Directive 021
Directive 021: Standards for
the Submission of Digital Log
Data to the EUB
November 1992
Effective June 17, 2013, the Energy Resources Conservation Board
(ERCB) has been succeeded by the Alberta Energy Regulator (AER).
As part of this succession, the title pages of all existing ERCB directives
now carry the new AER logo. However, no other changes have been
made to the directives, and they continue to have references to the
ERCB. As new editions of the directives are issued, these references
will be changed.
Some phone numbers in the directives may no longer be valid. Contact
AER Inquiries at 1-855-297-8311 or [email protected].
Directive 021
Standards for the Submission
of Digital Log Data to the EUB
November 1992
Effective January 1, 2008, the Alberta Energy and Utilities Board (EUB)
has been realigned into two separate regulatory bodies, the Energy
Resources Conservation Board (ERCB), which regulates the energy
industry, and the Alberta Utilities Commission (AUC), which regulates
the utilities industry.
As part of this realignment, the title pages of all existing EUB directives
now carry the new ERCB logo. However, no other changes have been
made to the directives, and they continue to have references to “EUB.”
As new editions of the directives are issued, these references will be
changed.
ENERGY RESOURCES CONSERVATION BOARD
Directive 021: Standards for the Submission of Digital Log Data to the EUB
November 1992
Published by
Energy Resources Conservation Board
640 – 5 Avenue SW
Calgary, Alberta
T2P 3G4
Telephone: 403-297-8311
Fax: 403-297-7040
[email protected]
Web site: www.ercb.ca
Directive 021
Standards for the Submission
of Digital Log Data to the EUB
November 1992
GUIDE RENAMED AS A DIRECTIVE
As announced in Bulletin 2004-02: Streamlining EUB Documents on Regulatory Requirements, the
Alberta Energy and Utilities Board (EUB) will issue only “directives,” discontinuing interim directives,
informational letters, and guides. Directives set out new or amended EUB requirements or processes to
be implemented and followed by licensees, permittees, and other approval holders under the jurisdiction
of the EUB.
As part of this initiative, this document has been renamed as a directive. However, no other changes
have been made. Therefore, the document text continues to have references to “guides.” These
references should be read as referring to the directive of the same number. When this directive is
amended, these references will be changed to reflect their renaming as directives.
BLANK PAGE
Standards for the Submission
of Digital Log Data to the EUB
November 1992
Imp~)ltant Message
The EUB is updating publications that pre-dated the
amalgamation of the Energy Resources Conservation Board
(ERCB) and the Public Utilities Board (PUB) in 1995. The
Alberta Energy and Utilities Board (EUB) takes the place of
any references to the ERCB, PUB, or their full names.
Major revisions to EUB documents are occurring as part of
regulatory re-engineering and streamlining initiatives. In
some cases, older publications are withdrawn or integrated
into new ones. This document has not yet gone through the
revision process. Please consult the latest Acts and
Regulations to interpret and apply legal requirements.
To find out a current contact name for this publication,
please call 297-8311.
ERCB Guide G-21
STANDARDS FOR THE SUBMISSION OF
DIGITAL LOG DATA TO THE ERCB
First Printing:
Second Printing:
November 1992
July 1993
Geology Department
Energy Resources Conservation Board
640 - Fifth Avenue SW
Calgary, Alberta
T2P3G4
DIGITAL LOG DATA SUBMISSION
Revised: July 8, 1993
TABLE OF CONTENTS
Page
GENERAL
· ...................................... 1
DATA TO BE CAPTURED-
· .... : ................................. 2
INCOMING DISKETIES
· ...................... : ............... 3
DATA FORMAT
· ...................................... 3
DEFICIENCIES
· ...................................... 5
ATTACHMENTS
· ...................................... 7
- Curve Codes Defined for Capture
- Log Header Infonnation to be Requested from the Industry
- LAS Version 2.0 - A Floppy Disk Standard for Log Data
- Example of Acceptable Data in Wrapped Mode
- Example of Acceptable Data in Unwrapped Mode
- Example of Unacceptable (Merged) Data
- Example of Unacceptable (Zoned) Data
BLANK PAGE
DIGITAL LOG DATA SUBMISSION
Page 1
Reviged:
8 Jriy 19)3
GENERAL
1.
The ERCB requires industry submission of digital log data pursuant to Section 11.140 of
the Oil and Gas Regulations for all new wells drilled in the province of Alberta. This
document defines the standards for the submission of such data. The standards defined
here are subject to change, but the ERCB will give as much advance notice to the
industry as possible in case of changes.
2.
If there are any questions or- comments regarding the standards, please call Mr. Andrew
Bau at 297-8106, or write to the same person at the ERCB.
3.
Submission of digital log data will be in addition to the submission of paper logs. No
timeframe has been established for the elimination of paper log submission.
4.
The paper logs and digital log data should be considered separate and independent
systems, although in general the log digits should be comparable to the optical curves on
the final prints of paper logs-.
5.
Digital log data submitted to the ERCB will be subject to the same conditions of
confidentiality as paper logs.
6.
Digital log data must be submitted to the ERCB within the same timeframe as paper logs
as outlined in Section 11.140 of the Oil and Gas Regulations, i.e., within thirty (30) days
of logging or finished drilling date.
7.
Digital log data should be on floppy diskettes and forwarded to:
Geology Department,
Energy Resources Conservation Board,
640 - Fifth Avenue SW,
Calgary, Alberta. TIP 3G4
8.
There is no requirement for submitting both the paper and digital log data at the same
time or in the same package. However, all log data must be forwarded to the address
shown above.
9.
It is the responsibility of the well licensees to ensure that digital log data are submitted to
the ERCB and to correct any deficiencies.
DIGITAL LOG DATA SUBMISSION
Page 2
Revis;rl:
8 Jtiy 1993
10. Diskettes that have been processed without triggering any deficiencies will be ERASED
of their contents as a security measure and will not be returned. Furthermore, the ERCB
does not guarantee that all data submitted by industry will be captured or retained on the
ERCB database. Therefore, licensees should only submit COPIES of their digital log
data.
11. If any of the logging or data requirements cannot be met, Section 11.140 of the Oil and
Gas Regulations stipulates that the ERCB may allow substitution or grant relief from the
requirements when special circumstances warrant.
DATA TO BE CAPTURED
1.
The ERCB's digital log system will be CURVE-BASED rather than log-based.
American Petroleum Institute (API) codes as published in API"BUL D9, Tables 20-23
(February 1981) will be used to identify the curves to be captured.
2.
The ERCB' s digital log system will only capture what are generally known as optical
curves on the final prints of paper logs. Attachment 1 shows a list of curve codes that
are defined for capture on the database. Other curves submitted will be bypassed.
3.
The ERCB system is designed to capture multiple curves with the same curve code,
provided that the curves are not exact duplicates. For example, if a well has eight
induction curves and they are all different but coded with the same code, they will all be
captured under that code.
4.
Although Section 11.140 of the Oil and Gas Regulations stipulates that all log data
need to be submitted to the ERCB, the current design of the digital log database will
allow capture of only those curve codes listed in Attachment 1. However, licensees are
still required to submit ALL paper logs that are run in a well.
5.
All curves associated with a particular log will not necessarily be captured.
6.
Repeat sections are to be properly coded so that they can be captured.
7.
Logging companies' curve mnemonics will be captured. However, they are not used as
capture criteria; only the curve codes are used as capture criteria.
DIGITAL LOG DATA SUBMISSION
8.
Page 3
Reviged:
8 Jtiy 1993
Log header infonnation, similar to that on paper logs, is required. Attachment 2 shows
the infonnation needed. The UNIQUE WELL IDENTIFIER (UWI), LICENCE
NUMBER and DATE LOGGED must be properly and correctly encoded in the data,
otherwise the data will be considered deficient and no capture will take place.
INCOMING DISKETTES
1. Digital log data must be submitted on floppy diskettes. Each diskette must be clearly
labelled with the following infonnation:
a. The UWI of the well logged.
b. The licensee name.
c. The licence number.
2.
Digital log data must be submitted on diskette with the following characteristics:
a. The diskette may be either 3.5 or 5.25 inches.
b. The diskette must be double-sided!double-density or
double-sided/high-density.
c. The diskette must be MSIDOS or PCIDOS fonnatted and readable on IBM
personal computers or compatibles.
DATA FORMAT
1. The ERCB will be accepting log data in LOG ASCII STANDARD (LAS) VERSION 2.0
as described in standards published by the Canadian Well Logging Society (CWLS;
Attachment 3). Two examples of acceptable data are shown in Attachments 4 and 5. It
is strongly recommended that any vendors or operators preparing digital log data for
submission to run the cvyLS's LAS CERTIFY program prior to submitting the data to
the ERCB. The CWLS should be contacted regarding any problems, questions, or
infonnation on the LAS fonnat and the CERTIFY program; the ERCB is not responsible
DIGITAL LOG DATA SUBMISSION
Page 4
Revis:d: 8 Jtiy 1993
for either of these.
2.
A diskette may contain data for NO MORE than one well but may contain more than one
file for the same well. Each file must be a 'standalone LAS file with all the necessary
sections and format of the LAS standards. No directory structure is allowed in the
diskette.
3.
Only three filename extensions are allowed. They are '.exe' for those files that are selfextracting, '.zip' for those that are compressed, in which case a decompression program
has to be provided in the diskette also, and '.las' for those that are in the non-compressed
standard ASCn format. All files must follow the CWLS's LAS guidelines.
4.
As mentioned previously, API codes are used to distinguish curves for capture
(Attachment 1). It is up to the logging industry to inform the ERCB what type of curve
it is (for example, gamma, bulk density and so on) and to code it appropriately for
capture. This applies to both existing curves and new curves in the future.
5.
An API code does not exist for the measured depth. A curve code of 001 must be
assigned to MEASURED DEPTH and a curve code of 960 for TRUE VERTICAL
DEPTIi (TVD). One of these curves must be the FIRST curve present in a file.
Otherwise a deficiency flag will be triggered and no data will be captured.
6.
If MEASURED DEPTIi (code (01) is present as the first curve, then all other curves will
be treated as 'data' curves, such as gamma, porosity and INCLUDING TVD (code 960).
If TVD (code 960) is present as the first curve, it will be used as the depth curve and
other curves will then be captured as 'data' curves.
7.
Measured depth data and TVD data can be presented as separate files on the same
diskette or different diskettes.
8.
Only the curve codes need to be specified. However, the log code, curve class and curve
modifier CANNOT be omitted. At the very least, a double zero '00' is needed for each
of these. A space is also needed between log code, curve code, curve class and curve
modifier. It is strongly recommended that all the codes are properly filled in. This will
make it much easier for potential users to identify the curves and to properly associate
the curves with logs.
9.
Data submitted must be in appropriate metric units.
10. The UWI, LICENCE NUMBER and DATE LOGGED must be properly and correctly
encoded in the data, otherwise the data will be considered deficient and no capture will
DIGITAL LOG DATA SUBMISSION
PageS
Revi<fd: 8 Jtiy 1993
take place.
11. Data may be submitted in either top-to-bottom or bottom-to-top representation.
12. All t:4e mnemonics and units may be of any length, but will be truncated to the first four
characters for capture on the ERCB database.
13. Repeat sections can be presented ETIHER as separate files on the same diskette or
different diskettes, OR as separate curve entries in the '-C' and '-A' sections of the same
file as the main pass.
14. Each run must be presented with its header infonnation followed by curve digits of the
same run. Although the LAS fonnat allows for 'merged' or 'zoned' log data with header
infonnation of different runs or zones presented sequentially followed by the 'merged' or_
'zoned' curve data, the ERCB database does not allow these modes of presentation
(Attachments 6 and 7).
15. When one di~kette is insufficient for storing a well's data, multiple diske~es may be used
with the data segmented either vertically or horizontally. However, each diskette must be
separately and independently processable
Example 1:
Diskette 1 contains curves A, B and C in their entirety. Diskette 2
contains curves D and E in their entirety, etc. The diskettes can be
loaded in any sequence and not necessarily consecutively, and both
diskettes contain full header infonnation.
Example 2:
Diskette 1 contains curves A, B, C, D and E from depth X to depth Y.
Diskette 2 contains curves A, B, C, D and E from depth Y to depth z.
The diskettes can be loaded in any sequence and not necessarily
consecutively, and both diskettes contain full header infonnation.
DEFICIENCIES
1.
Digital log data will not be loaded and diskettes will be returned with a deficiency
letter to the licensee if:
DIGITAL LOG DATA SUBMISSION
Page 6
a. There is a physical problem with the diskette rendering it unreadable.
b. The data representation does not confonn to LAS Version 2.0 standard. A fatal error
in the CWLS's LAS CERTIFY program will trigger this deficiency.
c. Log header information is totally missing.
d. Curve digits are totally missing.
e. The measured depth or TVD curve is not the first curve in the data.
f. There is a data gap or overlap in the depth readings.
g. UWI is missing in the data, or it does not exist on the ERCB database.
h. Licence number is missing in the data, or it does not exist on the ERCB
database.
i. There is a discrepancy between UWI and licence number for a well.
J. Date logged is missing in the log header section.
This list is not intended to be pennanent or exclusive. Data may be returned for
reasons not foreseen at this point. However, an attempt will be made to identify and
infonn the licensees of the problems.
2.
Deficiency letters will also be sent out to the licensees if required log digits are not
received within thirty (30) days of logging or finished drilling date.
DIGITAL LOG DATA SUBMISSION
ATTACHMENTS
Page?
Revmt 8 Jlly 19)3
BLANK PAGE
AlTACHMENT 1. CURVE CODES DEFINED FOR CAPTURE
(Curve codes and descriptions, except for MEASURED DEPTH, are taken from APIBUL D9.)
November 20, 1992
CURVE CODE
001
010
040
041
060
061
070
071
120
121
220
221
222
250
252
270
280
310
330
350
356
358
520
522
523
530
532
620
630
631
632
660
719
790
792
890
960
CURVE DESCRIPTION
MEASURED DEPTH
SELF POTENTIAL
SHORT NORMAL
SHORT NORMAL AMPLIFIED
LONG NORMAL
LONG NORMAL AMPLIFIED
LATERAL
LATERAL AMPLIFIED
INDUCTION RESISTIVITY .
INDUCTION RESISTIVITY AMPLIFIED
FOCUSSED RESISTIVITY
FOCUSSED RESISTIVITY AMPLIFIED
FOCUSSED RESISTIVITY AVERAGED
INVERSE
NORMAL
MICRO-FOCUSSED RESISTIVITY
CALIPER
GAMMA RAY
NEUTRON (pOROSITY)
DENSITY (BULK)
DENSITY CORRECTION
PHOTOELECTRIC CROSS SECTION
ACOUSTIC INTERVAL TRANSIT TIME COMPRESSIONAL WAVE COMPENSATED
ACOUSTIC INTERVAL TRANSITTIME COMPRESSIONAL WAVE, NON-COMPENSATED
ACOUSTIC INTERVAL TRANSIT TIME COMPRESSIONAL WAVE LONG SPACED
ACOUSTIC INTERVAL TRANSIT TIME WAVE orr COMPRESSIONAL COMPENSATED
ACOUSTIC INTERVAL TRANSIT TIME WAVE orr COMPRESSIONAL NON-COMPENSATED
HOLE DEVIATION
HOLE AZIMUTH
HOLE RELATIVE BEARING
TOOL AZIMUTH
TEMPERATURE
POTASSIUM
THORIUM
URANIUM
POROSITY (DENSITY AND OTHERS, NO NEUTRON)
TRUE VERTICAL DEPTH
BLANK PAGE
ATIACHMENT 2. LOG HEADER INFORMATION TO BE REQUESTED FROM INDUSTRY
November 20, 1992
MNEMONIC
DESCRIPTION
FIELD WIDTH ERCB'S DEFAULT VALUE
AND TYPE
IF MISSING
UWI .
Unique Well Identifier
a (16)
LIC •
Licence Number
annnnnnna
None
DATE.
Date Logged
nn-aaa-nn
None
STRT.M
Log Interval Start
nnnnn.nnnn
Compute from Curve Data
STOP.M
Log Interval Stop
nnnnn.nnnn
Compute from Curve Data
STEP.M
Log Step
+n.nnnn
Compute from Curve Data
NULL.
Null Value
+nnn.nnnn
-999.2500
COMPo
Licensee Name
a (56)
Blank
WELL.
Well Name
a(36)
Blank
FLD •
Field Name
a (20)
Blank
LOC •
Location
a (20)
Blank
PROVo
Province
a (15)
Alberta
SON •
Service Order Number
a (10)
Blank
SRVC.
Logging Company
a (56)
Blank
NOTE:
,.
None
a · alphanumeric
n • numeric
* • The 'Licence Number' requires a minimum of seven numeric characters.
page A2-1
ATTACHMENT 2. LOG HEADER INFORMATION TO BE REQUESTED FROM INDUSTRY
November 20, 1992
MNEMONIC
DESCRIPTION
FIELD WIDTH ERCD'S DEFAULT VALUE
AND TYPE
IF MISSING
RUN •
Run Number
nn
01
DREF.
Depth Reference
a(20)
KB
EREF.M
Elev of Depth Reference
nnnnn.nn
-9999.99
GL
Ground Elevation
nnnnn.nn
Ground-Elev
TDD .M
TD (Driller)
nnnnn.nn
-9999.99
TDL .M
TD (Logger)
nnnnn.nn
-9999.99
CSGD.M
Casing Bottom (Driller)
nnnnn.nn
-9999.99
CSGL.M
Casing Bottom (Logger)
nnnnn.nn
-9999.99
CSGS.MM
CaSing Size
nnnn
-999
CSGW.KG/M
Casing Weight
nnn.nn
-99.99
BS
Bit Size
nnnn
-999
MUD •
Mud Type
a (30)
Blank
MUDS.
Mud Sample Source
a (30)
Blank
MUDD.KG/M3
Mud Density
nnrrn.nn
-999.99
MUDV.SEC/L
Mud Viscosity
nnn
-99
.M
.MM
PH
.
Mud pH
nn.nn
07.00
FL
. ML/30MIN
Mud Fluid Loss Rate
nn.nn
-9.99
Page A2-2
ATfACHMENT 2. LOO HEADER INFORMATION TO BE REQUESTED FROM INDUSTRY
November 20, 1992
MNEMONIC
DESCRIPTION
FIELD WIDTH BRCD'S DEFAULT VALUE
AND TYPE
IF MISSING
RM
.OHMM
Mud Resistivity
nn.nnn
-9.999
RMT .DEGC
Mud Sample Temp
nnn.n
-99.9
RMF .OHMM
Mud Filtrate Resistivity
nn.nnn
-9.999
RMFT.DEGC
Mud Filtrate Sample Temp
nnn.n
-99.9
RMC .OHMM
Mud Cake Resistivity
nn.nnn
-9.999
RMCT.DEGC
Mud Cake Sample Temp
nnn.n
-99~9
TMAX.DEGC
Max Recorded Temp
nnn.n
-99.9
TIMC.DAY/HR
Time Circulation Ended
a (20)
Blank
TIML.DAY/HR
Time Logger on Bottom
a (20)
Blank
UNIT.
Equipment ID
a (20)
Blank
BAS:E:.
Equipment Base Location
a (20)
Blank
ENG •
Recording Engineer
a (20)
Blank
WIT •
Witnessed By
a (20)
Blank
Page 1\2-3
BLANK PAGE
ATTACHMENT 3
LAS VERSION 2.0
SEPT 25,1992
A FLOPPY DISK
STANDARD FOR LOG DATA
BY
Canadian Well Logging Society, Floppy Disk Committee
Suite 229, 640 - 5 Avenue, S.W.
Calgaty, Alberta T2P 3G4
Canada
ABSTRACI'
The Canadian Well Logging Society's Floppy Disk Committee has designed a standard format
for log data on floppy disks. It is known as the LAS format (Log ASCII Standard). LAS consists
of files written in ASCII containing minimal header information and is intended for optical .
presented log curves. Details of the LAS format are described in this paper.
The purpose of the LAS format is to supply basic digital log data to users of personal computers
in a format that is quick and easy to use.
INTRODUCTION
Log analysts who u.se personal computers have, in the past, been entering log data into their
machines mainly through a hand digitizing procedure because most personal computers are
unable to handle data from magnetic tapes. The industry was beginning to address this
inefficiency by making log data available on floppy disks in a variety of. formats. rt was at
this point that the Canadian Well Logging Society set up the Floppy Disk Committee to design
a standard for log data on floppy disks that would meet the needs of personal computer users.
Various standards for digital well log data already exist. The LIS format (Log Information
Standard) is one of the more popular standards. A more complete standard has been designed by
the American Petroleum Institute and is known as the DLIS format (Digital Log Interchange
Standard). Both of these standards are very useful but because of their completeness, and
resulting complexity, they do not address the needs of most personal computer users.
Users of personal computers have serious space limitations and are normally only interested in
the optically presented curves. They also want to get this data into their machines quickly and
easily. The LAS format addresses these needs and can be compared to a "Reader's Digest"
version of the LIS or DLIS formats. If more detailed log information is required, then the LIS or
DLIS format should be used. The LAS format is intended to complement the LIS or DLIS
formats as each has its own specific purpose.
GENERAL DESCRIPTION
The LAS format was designed to be easily understood by the user and at the same time contain
enough flags to assist the programmer. The LAS format must always be written in ASCI. If it is
written using a compression routine, in binary, or in any other fonn, an executable program must
exist on the floppy disk that will convert the file back to LAS format.
The LAS format consists of files. For example, a repeat section would make up one file and the
main pass another. Each of the file names end in ".LAS" so that they can be easily recognized.
An individual floppy disk must not contain partial files that continue onto a second floppy
disk. Large files that do not fit on one floppy must be split into two or more files.
Each file consists of numerous sections. These sections are not order specific except that the last
section must always be the data section. The first section is usually the "VERSION" section
containing the version number of the LAS format and identifies whether the data is in wrap
mode. The "WELL INFORMATION" section contains information on the well name, location,
and the start and stop depths of the data in this file. The "CURVE INFORMATION" section
contains the curve mnemonics, units used, and the definitions of these mnemonics, in the order
that they appear in the data section. The"PARAMETER" section contains information on
parameters or constants (such as mud resistivities) and is optional. The "OTHER" section is
also optional and contains any other information or comments. The last section is always the
"ASCll LOG DATA" section. Depth values normally appear in the first column and each
column of data must be separa~ by a space.
More detailed LAS format specifications can be found in the Appendix.
REFORMAT AND CERTIfY PROGRAMS
To assist users of LAS formatted. data, a program was written to modify LAS files into forms
that may be more compatible to the user's needs. This program is called REFORMAT and
performs the following tasks:
1) Extract a specific depth interval
2) Extract specific curves
3) Reverse depth direction
4) Change sampling interval
5) Convert wrap mode to unwrap mode
6) Scan for non-standard characters that may be causing difficulties for some programs.
7) Convert LAS version 1.2 to LAS version 2.0
The CERTIFY program was designed to verify that files meet the LAS standard. If the LAS
standards are not met, it will identify the errors. In case of disagreement between this program
and the printed LAS standard document, the document will be deemed to be correct. The
CERTIFY program also includes documentation on the LAS standard.
-2-
The REFORMAT and CERTIFY programs were written by Robin Winsor of Gulf Canada
Resources Ltd. in ANSI standard "C' and compiled with a Microsoft C 5.1 compiler. TIlese
programs are not part of the LAS standard.
The author of these programs does not reserve any rights and does not warrant the program for
any specific purpose. An LAS infonnation package is available for $10.00 through the
C.W.LS. The package includes an executable fonn of the REFORMAT and CERTIFY programs,
source code for REFORMAT, and two test LAS files on a 3.5 inch 720K DOS compatible floppy
disk.
The address is as follows:
. Canadian Well Logging Society
#229,640 - 5 Avenue, S.W.
Calgary, Alberta
CANADA T2P 3G4
CONCLUSIONS·
The latest version of the LAS standard is version 2.0 which first became available in
September 1992. The CWLS Floppy Disk Committee will continue to monitor the LAS standard
to address problems and make modifications as required. Feedback concerning the user's likes or
dislikes would be greatly appr~ted and should be sent to the CWLS to the attention of the
Floppy Disk Committ~.
It is hoped that by creating the LAS. standard, more widespread use will be made
of digital log. data.
-3-
BLANK PAGE
APPENDICES
Appendix 1
LAS Format Specifications for Version 2.0
Appendix 2
Example LAS Files
Appendix 3
REFORMAT Program
Appendix 4
CERTIFY Program
Appendix 5
Updates
-4-
BLANK PAGE
APPENDIX 1
LAS FORMAT SPECIFICATIONS FOR
VERSION 2.0
PARr 1
GENERAL DESCRIPTION
- The LAS Fonnat is designed to store log data on floppy disks. This standard is intended to
simplify the exchange of digital log data between users. The general specifications of this
format are as follows:
- The floppy disk size, type, or density is not specified because conversion between them is
straightforward.
- It is the intent of this standard to stor~ optically presented log curves although other curves
may also be stored. Raw count rates, wave fonn data etc. are more efficiently stored on magnetic
tape using US or DLIS format.
- Floppy disks in the LAS fonnat must be MS/DOS or PC/DOS compatible
- The file must be written in ASOI. If the file is written using a compression routine, in binary,
or in any other fonn, an executable program must exist on the floppy to convert it back to LAS
format.
- An individual floppy disk must not contain partial files that continue onto a second floppy.
Large files that do not fit onto one floppy must be split into two or more separate files. This
may be achieved by splitting the curves or segmenting the depths.
- All files in LAS format must end in ".LAs" so that they may be easily recognized.
- The LAS fonnat is a minimum standard. It is expected that most users and suppliers will
exceed this minimum standard.
PARr 2
MAIOR COMPONENTS OF AN LAS FILE
- Each LAS file contains numerous sections and each section begins with a tilde (-) mark. The
last section in an LAS file must always be the log data section.
- The sections that make up an LAS file are as follows:
-
V
W
C
P
0
A
- contains version and wrap mode information
- contains well identification
- contains curve infonnation
,
- contains parameters or constants (this section is optional)
- contains other infonnation such as comments (this section is optional)
- contains ASOI log data
- These sections are described in more detail in part four of this appendix.
-5-
PARI'3
FLAGS
Flags are used to assist computers in identifying specific lines in a file. The following flags are
used in the LAS format:
"_" (tilde): The ASCll equivalent of this flag is decimal 126 or hexadecimal 7E. This flag
when used will be the first non-space and non-quotation character on a line. It is used to
mark the beginning of a section in a file. The first letter directly after the tilde
identifies the section. (See part two.) All upper case letters in the space follOwing a
tilde mark are reserved for use by the committee. TIle remainder of the line will be
treated as comments.
"I" (pound): The ASCII equivalent of this flag is decimal 35 or hexadecimal 23. This flag when
used will be the first non-space and non-quotation character on a line. TIle pound sign is used to
indicate that the line is a comment line. Comment lines can appear anywhere above the-A
section.
"." and ":": In the "VerSion", "Well", "Curve", and Parameter", sections the dots, colons,
and spaces are used to delimit the information within the line. Each non-<:omment line
in these sections must contain one dot and one colon, and have their lines laid out as
follows:
MNEM.UNITS
Where
DATA
:DESCRIPTION OF MNEMONIC
MNEM =mnemonic. This mnemonic can be of any length but must not contain any
internal spaces, dots, or colons. Spaces are permitted in front of the
mnemonic and between the end of the mnemonic and the dot.
UNITS
=units of the mnemonic (if applicable). TIle units if used, must be located
directly after the dot. TIlere must be no spaces between the units and the
dot. The units can be of any len&th but must not contain any colons or
internal spaces.
DATA
=value of, or data relating to, the mnemonic. This value or input can be of
any length and can contain spaces or dots as appropriate, but must not
contain any colons. It must be preceded by at least one space to
demarcate it from the units and must be to the left of the colon.
=
DESCRIPTION description or definition of the mnemonic. It is always located
to the right of the colon. Its length is limited by the total line length
limit of 256 characters which includes a carriage return and a line feed.
PARI' 4
DETAILS
The actual format for each of the sections discussed in this part of the paper is best understood
by looking at the examples in the boxed areas. The exact spacing is not critical because computer
programs will use the dots, colons, and spaces to decipher each line.
-6-
-v <Version Infonnation)
-This section is mandatory and usually appears at the very beginning of the file.
-It identifies which version of the LAS fonnat is being used and whether wrap mode is used.
-This section must contain the following lines:
·VERS.
2 . 0 : eWLS LOG ASCII STANDARD - VERSION 2.0·
Refers to which version of LAS was used.
·WRAP.
Y E S : Multiple lines per depth step·
OR
"WRAP.
NO
: One line per depth step"
Refers to whether a wrap around mode was used in the data section. If no wrap mode
is used the line will have a maximum length of 256 characters (including the carriage
return and line feed). If wrap mode is used the depth value will be on its own line and
all lines of data will be no longer than 80 characters (including carriage return and line
feed).
-Additional lines in the version section are optional.
-The following is an example of a Version Information Section.
.
.
-----------------------------------------------------------------------------
-Version Information Section
VERSo
2.0:
CWLS log ASCII Standard -VERSION 2.0
WRAP.
NO : One line per depth step
-W (Well Infonnation)
-This section is mandatory.
-It identifies the well, its location and indicates the start and stop depths of the file.
-"I:his section must contain the following lines with the mnemonics as indicated:
"STRT.M .
nnn.nn : START DEPTH"
Refers to the first depth in the file. The "nnn.nn" refers to the depth value. The number
of decimals used is not restricted. The ".M" refers to metres and can be replaced when
other units are used. The start depth ~ be either greater or less than the stop depth.
"STOP..M
nnn.nn : STOP DEPTH"
Refers to the last depth in the file. The "nnn.nn" refers to the depth value. The number
of decimals used is not restricted. The ".M" refers to metres and can be replaced when
other units are used.
-7-
"STEP.M
nnn.nn : STEP"
Refers to the depth increment used. A minus sign must precede the step value if the
start depth is greater than the stop depth (ie, from 1D to casing has a minus step
value). A step value of zero indicates a variable step.
"NULL.
nnnn.nn: NULL VALUE"
Refers to null values. Two common ones in use are -9999 and -999.25.
"COMP.
aaaaaaaaaaaaaaaaaaaaa
Refers to company name.
: COMPANY"
"W ELL.
aaaaaaaaaaaaaaaaaaaaa
Refers to the well name.
WELL"
aaaaaaaaaaaaaaaaaaaaa
FIELD"
"F L 0 •
Refers to the field name
aaaaaaaaaaaaaaaaaaaaa
"L 0 C.
LOCATION"
Refers to the well location.
"P R 0 V •
aaaaaaaaaaaaaaaaaaaaa : PROVINCE"
Refers to the province. For areas outside Canada this line may be replaced by:
"CNTY.
aaaaaaaaaaaaaaaaaaaaa
COUNTY""
"S TAT.
aaaaaaaaaaaaaaaaaaaaa
STATE"
aaaaaaaaaaaaaaaaaaaaa
COUNTRY"
"CTRY.
"S RV C.
aaaaaaaaaaaaaaaaaaaaa
SERVICE COMPANY·
Refers to logging company.
"0 ATE.
aaaaaaaaaaaaaaaaaaaaa
Refers to date logged.
"UWI •
"API.
DATE"
aaaaaaaaaaaaaaaaaaaaa : UNIQUE WELL 10"
Refers to unique well identifier. (See References.) For areas outside of Canada this may
be replaced by:
aaaaaaaaaaaaaaaaaaaaa
: API NUMBER"
-Additional lines in the well information section are optional. There is no limit set on the
number of additional lines.
-The following is an example of a Well Information Section in LAS version 2.0
-Well Information Section
______________
._n_______
DESCRIPTION
OF MNEMONIC
DATA
'MNEM.UNIT "
#
STRT.M
635.0000
4'00.0000
STOP.M
STEP.M
-0.1250
NULL.
-999.25
COMPo
ANY OIL COMPANY INC.
WELL.
ANY ET AL 12-34-12-34
FLO •
WILDCAT
:START DEPTH
:STOP DEPTH
:STEP
:NULL VALUE
:COMPANY
:WELL
:FIELO
-8-
LOC •
PROVo
SRVC.
DATE.
UWI •
12-34-12-34W5M
ALBERTA
ANY LOGGING COMPANY INC.
13-DEC-86
.
10012341234W500
:LOCATION
.:PROVINCE
:SERVICE COMPANY
:LOG DATE
:UNIQUE WELL 10
-C (Curve Infonnation)
-This section is mandatory.
-It describes the curves and their units in the order they appear in the data section of the file.
-The mnemonics used are not restricted but must be defined on the line in which they appear.
-API codes are optional. (See References.)
-The curves described in this section must be present in the data set.
-The first curve described is normally depth.
- The units mnemonics if used must be directly to the right of the dot No spaces must occur
between the dot and the units mnemonic.
-The following is an example of a Curve Information Section with API codes.
-------------------------------------------------Curve Information Section
#MNEM.UNIT
# .
DEPTH.M
RHOB .KlM3
NPHI
.VOLNO
MSFL .OHMM
SFLA .OHMM
ILM
.OHMM
ILD
.OHMM
SP
.MV
GR
.GAPI
CALI .MM
DRHO .KlM3
API CODE
---
45
42
20
07
07
07
07
45
45
45
350
890
270
222
120
120
010
310
280
356
02
00
01
01
44
46
01
01
01
01
00
00
00
00
00
00
00
00
00
00
Curve Description
1
2
3
4
5
6.
7
8
9
10
11
DEPTH
BULK DENSITY
NEUTRON POROSITY - SANDSTONE
Rxo RESISTIVITY
SHALLOW RESISTIVITY
MEDIUM RESISTIVITY
DEEP RESISTIVITY
SPONTANEOUS POTENTIAL
GAMMA RAY
CALIPER
DENSITY CORRECTION
-p (Parameter Information)
-This section is optional. It defines the input values of various parameters relating to this well
These input values can consist of numbers or words.
-The mnemonics used are not restricted but must be defined on the line on which they appear.
-There is no limit on the number of lines that can be used.
-9-
-The following is an example of a Parameter Information Section.
--------------.. .- - --------------------Parameter Information Section
,
'MNEM.UNIT
MUD •
BHT • DEG
BS· .MM
FD
.KlM3
MDEN.KlM3
MATR.
FNUM.
FEXP.
DFD .KlM3
DFV .S
DFL
.C3
DFPH.
RMFS .OHMM
EKB .M
EGL .M
Value
GEL CHEM
114.0000
222.0000
999.9999
2650.0000
SAND
1.0000
2.0000
1200.0000
50.0000
8.0000
10.0000
2.8200
566.9700
563.6799
Description
Mud type
BoHom Hole Temperature
Bit Size .
Fluid Density
Logging Matrix Density
Neutron Matrix
Tortuosity COnstant Archie's (a)
Cementation Exponent Archie's (m)
Mud Weight
Mud Viscosity
Mud Fluid Loss
Mud pH
Mud Filtrate Resistivity
Elevation Kelly Bushing
Elevation Ground Level
-0 (Other Information)
-This section is optional. It is intended as a remarks or comments section.
-The following is an example of an "Other Information Section"
-Other Information Section
The log digits for this well were hand digitized from very poor half scale log
prints. This was the best Information available at the time. Every aHempt should
be made to track down the original fllms •• Dec. 12,1990 John Doe, Petrophysics
-A (ASCII LOG DATA)
-The data section will always be the last section in a file.
-Each column of data must be separated by at least one space.
-A line of less than 256 characters (including a carriage return and line feed) will normally not
be wrapped. Wrap mode will be used if the data is longer than 256 characters.
-In wrap model depth will be on its own line.
-In wrap model a line of data will be no longer than 80 characters. This includes a carriage
return and line feed.
-If wrap mode is usedl the decimal points should be aligned for ease of reading.
-Exponents are not pennitted. The curve section can be used to overcome this limitation by
changing the units.
-10-
REFERENCES
UWI codes: ''Formation Water Resistivities of Canada", CWLS, 1987.
API codes : "Recommended Standard Fonnat for Recording Digital Well Log
Data on Magnetic Tape", API - Bul. 0-9, 3rd edition, 1981.
-11-
BLANK PAGE
APPENDIX 2
EXAMPLE LAS FILES
EXAMPLE #1- THE LAS STANDARD IN UNWRAPPED MODE
-VERSION INFORMATION
VERS •
2.0
WP.I>P.
NO
-WELL INFORMATION
#MNEM.~IT
: CWLS LOG ASCII STANDARD -VERSION 2.0
: ONE LINE PER DEPTH STEP
DESCRIPTION OF MNEMONIC
DATA
#-:START DEPTH
1670.0000
:STOP DEPTH
1660.0000
-0.1250
:STEP
:NULL VALUE
-999.25
:COMPANY
ANY OIL COMPANY INC.
:WELL
ANY ET /JJ.. 12-34-12-34
:FIELD
WILDCAT
:LOCATION
12-34-12-34W5M
:PROVINCE
ALBERTA
:SERVICE COMPANY
ANY LOGGING COMPANY INC.
:LOGDATE
13-DEC-86
:UNIQUE WELL 10
UWI.
100123401234W500
-CURVE INFORMATION
#MNEM.UNIT
API CODES
CURVE DESCRIPTION
STRT .M
STOP .M
STEP .M
NULL •
COMP •
WELL.
FLO
LOC.
PROV .
SRVC •
DATE •
#
DEPT
60 520 32
RHOS.K1M3
45 350 01
NPHI
.VN
42 890 00
.OHMM
07 220 04
SFLU
SFLA
.OHMM
07 222 01
ILM
.OHMM
07 120 44
ILD
.OHMM
07 120 46
-PARAMETER INFORMATION
#MNEM.UNIT
VALUE
#
MUD
BHT
:
:
:
:
:
:
:
:
.M
DT.USiM
.
.DEGC
00
00
00
00
00
00
00
GELCHEM
35.5000
200.0000
1000.0000
SAND
2710.0000
0.2160
1525.0000
1
2
3
4
5
6
7
8
DEPTH
SONICTRANSITTIME
BULK DENSITY
NEUTRON POROSllY
SHALLOW RESISTIVITY
SHALLOW RESISTIVITY
MEDIUM RESlSTlVllY
DEEP RESISTIVITY
DESCRIPTION OF MNEMONIC
:
:
:
:
:
:
:
:
MUDlYPE
BOTTOM HOLE TEMPERATURE
BlTSIZE
FLUID DENSllY
NEUTRON MATRIX
LOGGING MATRIX DENSITY
MUD FILTRATE RESISTIVITY
DRILL FLUID DENSI1Y
BS
.MM
FD
.K1M3
MATR
MOEN .
RMF
.OHMM
DFD
.KlM3
-OTHER
Note: The logging tools became stuck at 625 metres causing the data between 625 metres and
615 metres to be invalid.
NPHI
SFLU
SFlA
l.M
ILD
-A DEPTH DT
RHOB
1670.000 123.450 2550.000 0.450 123.450 123.450 110.200 105.600
1669.875 123.450 2550.000 0.450 123.450 123.450 110.200 105.600
1669.750 123.4502550.000 0.450 123.450 123.450 110.200 105.600
-12-
EXAMPLE #2 - ILLUSTRATING THE LAS STANDARD WITH
MINIMUM HEADER REQUIREMENTS IN UNWRAPPED MODE.
"'V
VERS .
WRAP.
2.0
NO
: ·CWLS log ASCII Standard -VERSION 2.0
: One line per depth step
"'W
STRT.M
SfOP.M
STEP.M
NULL
COMPo
WELL
FLO .
LOC •
PROVo
SRVC.
DATE.
UWI
"'C
DEPT
RHOB
NPHI
MSFL
SFLA
ILM
ILD
SP
635.0000
400.0000
-0.1250
-999.25
ANY OIL COMPANY INC.
ANY ET AL 12-34-12-34
WILDCAT
12-34-12-34W5
ALBERTA
ANY LOGGING COMPANY INC.
13-0EC-86
100123401234VV.500
•
.M
.KIM3
.VOLNOL
.a-iMM
.a-iMM
.a-iMM
.00MM
}SI/
"'A
635.0000
634.8750
:
:
:
:
:
:
:
:
:START DEPTH
:STOP DEPTH
:STEP
:NULL VALUE
:COMPANY
:WELL
:FIELD
:LOCATION
:PROVINCE
:SERVICE COMPANY
:LOGDATE
:UNIQUE WELL 10
DEPTH
BULK DENSITY
NEUTRON POROS1TY - SANDSTONE
Rxo RESISTIVITY
SHALLOW RESISTIVITY .
MEDIUM RESISTIVITY
DEEP RESISTIVITY
SPONTANEOUS POTENTIAL
2256.0000 0.4033 22.0781 22.0781 20.34383.6660123.4
2256.0000 0.4033 22.0781 22.0781 20.3438 3.6660 123.4
-13 -
EXAMPLE #3 - ILLUSTRATING THE WRAPPED VERSION
OF THE LAS STANDARD
-VERSION INFORMATION
VERS.
2.0
CWLS log ASCII Standard -VERSION 2.0
WRAP.
YES
Multiple lines per depth step
.
-WELL INFORMATION
#MNEM.UNIT
DESCRIPTION OF MNEMONIC
DATA
#-:START DEPTH
STRT .M
910.0000
:STOP DEPTH
909.5000
STOP .M
:STEP
STEP .M
-0.1250
:NULLVALUE
NULL •
-999.25
:COMPANY
COMP •
ANY OIL COMPANY INC.
:WELL
WELL •
ANY ET AL 12-34-12-34
:FIELD
FLO
WILDCAT
:LOCATION
LOC.
12-34-12-34W5
:PROVINCE
ALBERTA
PROV .
:SERVICE COMPANY
ANY LOGGING COMPANY INC.
SRVC .
:SERVICE ORDER NUMBER
SON.
142085
DATE .
13-DEC-86
:LOGDATE
:UNIQUE WELL 10
UWt'.
100123401234W500
-CURVE INFORMATION
#MNEM.UNIT
CURVE DESCRIPTiCJ'J
#
DEPT
.M
: Depth
DT
.USh.1
: 1 Sonic Travel Time
RHOS .Kh.4
.: 2 Density-Bulk Density
NPHI
.VN
: 3 Porosity -Neutron
: 4 Resistivity -Rxo
.0l-t.4M
RXO
: 5 Resistivity -5hal1ow
RESS
.OI-NM
RESM .QI-f.1M
: 6 Resistivity -MediJm
RESD
.0I-f.1M
: 7 Resistivity -Deep
: 8 Spon. Potential
SP
.MV
.GAP!
: 9 GaITmi Ray
GR
CALI
.MM
: 10 Caliper
DRHO .KtM3
: 11 Delta-Rho
: 12 EPT Attenuation
EATT
.DBM
: 13 TP -EPT
TPL
.NSM
PEF
: 14 Photoelectric Factor
: 15 Porosity -NML Ffl
.VN
FA
: 16 Caliper-Differential
DCAL
.MM
: 17 Density-Formation
RHGF .KIM3
: 18 Density-Apparent
RHGA .KtM3
.MV.
: 19 Baselined SP
SPBL
: 20 Gamma Ray BHC
.GAP!
GRC
: 21 Porosity -Apparent
PHIA
.VN
PHID
: 22 Porosity -Density
.VN
PHIE
: 23 Porosity -Effective
.VN
: 24 Porosity -Neut BHC
PHIN
.VN
: 25 Porosity -Total HCC
PHIC
.VN
:26Ro
RO
.OHMM
:27Rfa
RWA
.OHMM
: 28 Sw -Effective
SW
: 29 Sh Idx -Min
MSI
:30BVW
BVW
.
~
14-
FGAS
PIDX
FBH
FHCC
LSWB
•
: 31 Flag -Gas Index
: 32 Prod Idx
: 33 Flag -Bad Hole
: 34 Flag -He Correction
: 35 Flag -Limit SWB
"'A Log data section
910.000000
-999.2500 2692.7075 0.3140 19.4086 19.4086 13.1709 12.2681
-1.5010 96.5306 204.7177 30.5822 -999.2500 -999.2500 3.2515
-999.2500 4.7177 3025.0264 3025.0264 -1.5010 93.1378 0.1641
0.0101 0.1641 -0.3140 0.1641 11.1397 0.3304 0.9529
0.0000 0.1564 0.0000 11.1397 0.0000 0.0000 0.0000
909.875000
-999.2500 2712.6460 0.2886 23.3987 23.3987 13.6129 12.4744
-1.4720 90.2803 203.1093 -18.7566 -999.2500 "-999.2500 3.7058
-999.2500 3.1093 3004.6050 3004.6050 - -1.4720 86.9078 0.1456
-0.0015 0.1456 0.2886 0.1456 14.1428 0.2646 1.0000
0.0000 0.1456 0.0000 14.1428 0.0000 0.0000 0.0000
909.750000
-999.2500 2692.8137 0.2730 22.5909 22.5909 13.6821 12.6146
-1.4804 89.8492 201.9287 3.1551 -999.2500 -999.2500 4.3124
-999.2500 1.9287 2976.4451 2976.4451 -1.4804 86.3465 0.1435
0.0101 0.1435 "0.2730 0.1435 14.5674 0.2598 1.0000
0.0000 0.1435 0.0000 14.5674 0.0000 0.0000 0.0000
909.625000
-999.2500 2644.3650 0.2765 18.4831 18.4831 13.4159 12.6900
-1.5010 93.3999 201.5826 -6.5861 -999.2500 -999.2500 4.3822
-999.2500 1.5826 2955.3528 2955.3528 -1.5010 89.7142 0.1590
0.0384 0.1590 0.2765 0.1590 11.8600 0.3210 0.9667
0.0000 0.1538 0.0000 11.8600 0.0000 0.0000 0.0000
909.500000
"
-999.2500 2586.2822 0.2996 13.9187 13.9187 12.9195 12.7016
-1.4916 98.1214 201.7126 -4.5574 -999.2500 -999.2500 3.5967
-999.2500 1.7126 2953.5940 2953.5940 -1.4916 94.2670 0.1880
0.0723 0.1880 0.2996 0.1880 8.4863 0.4490 0.8174
0.0000 0.1537 0.0000 8.4863 0.0000 0.0000 0.0000
.. 15 -
EXAl\1l'LE#4 LAS FILE-FOR TIME BASED DATA
-VERSION INFORMATION
VERS •
WRAP.
#
2.0
NO
CWLS LOG ASCII STANDARD -VERSION 2.0
ONE UNE PER TIME STEP
-WELL INFORMATION
STRT .S
0.0000
STOP .S
39.9000
STEP .S
0.3000
NULL.
-999.25
COMP.
ANY OIL COMPANY INC.
WELL.
ANY ET AL 12-34-12-34
FLO
WILDCAT
LOC
•
12-34-12-34W5
PROV •
ALBERTA
SRVC •
ANY LOGGING COMPANY INC.
DATE .
13-DEC-86
UVVI
100123401234W500
:STARTTIME
:STOPTIME
:STEP
:NULL VALUE
:COMPANY
:WELL
:FIELD
:LOCATION
:PROVINCE
:SERVICE COMPANY
:LOG DATE
:UNIQUE WELL 10
#
-CURVE INFORMATION
ETIM .S
BFR1 .OHMM
BSG1 .PSIG
: 1 ELAPSED TIME
: 2 SINGLE PROBE 1 RESISTIVITY
: 3 SINGLE PROBE 1 STRAIN GAUGE PRESSURE
#
-PARAMETER INFORMATION
MRT .DEGC
67.0
GDEPT .M
3456.5
DFD
.KGlM3
1000.0
: BOTTOM HOLE TEMPERATURE
: GAUGE DEPTH
: MUD WEIGHT
#
-A
0.0000
0.3000
0.6000
0.9000
1.2000
1.5000
16564.1445
16564.1445
16564.2421
16564.0434
16564.0430
16564.0435
0.2125
0.2125
0.2125
0.2125
0.2125
0.2125
-16-
BLANK PAGE
APPENDIX 3
REFO'RMAT PROGRAM
The REFORMAT program was designed to manipulate LAS formatted files into a form which may
be more compatible with the user's needs. The REFORMAT program is not part of the LAS
standard.
The REFORMAT program is capable of doing the following things:
1) Extract a depth interval
- This allows the userto build a new LAS file covering a specific depth interval of the input
file. It works on unwrapped data only.
2) Extract one or more curves
- This allows the user to build ~ new LAS file containing only the curves specified by him. It
will handle input data with lines up to 1200 characters long. It works only on unwrapped
data.
3) Reverse depth direction
- Logs can be recorded from bottom to top or visa versa. This routine reverses the depth
direction. It works on unwrapped data only.
4) Change depth step (i.e. depth increment)
.
- The depth step refers to the depth increment. This routine works only on unwrapped
data.
5) Convert wrap to unwrap mode
- Wrap mode refers to the mode where the depth value is on its own line and all of the
curve data for that depth value are on the lines that follow (see TEST02.LAS for an
example). Unwrap mode means there is only one line of curve data for each depth step
and the depth value is the first value in that line. This routine converts wrapped data to the
unwrapped mode provided that the resulting lines are not longer than 1200 characters
6) Scan for non-standard characters
- Non ASCll or unprintable characters can cause difficulties to some programs. This
routine allows the user to find them and delete them.
7) Convert LAS version 1.2 to LAS version 2.0
The REFORMAT program was written in ANSI standard 'C' and has been compiled with Microsoft
C5.1 compiler. The author of the program does not reserve any rights and does not warrant the
program for any specific purpose. The executable as well as the code for REFORMAT is included
on the enclosed floppy disk.
-17 -
BLANK PAGE
APPENDIX 4
CERTIFY PROGRAM
The CERTIFY program was designed to read LAS files and establish whether all of the LAS
specifications are being adhered to. This program also points out where the LAS specifications
are not being followed
This program issues two types of messages. One is a ~ARNING" and the other is a "FATAL
ERROR". The "WARNING" is used to point out items that meet the LAS standard but could be
improved upon to make the file more infonnative to the user. For example, if the 'location"
field in the Well Infonnation Section is left blank the CERTIFY program will issue a
WARNING. The "FATAL ERROR" message is issued on items that fan to meet the LAS
specifications. For example if the 'location" field is omitted from the Well Infonnation
Section, the CERTIFY program will issue a "FATAL ERROR" message.
The CERTIFY program is not part of the LAS Standard. It is being made available to assist the
user in locating and identifying the most commonly occurring errors.
-18 -
BLANK PAGE
APPENDIX 5
UPDATES
AUGUST14~ '1991
LAS
-version 1.2
REFORMAT -version 2.0 (correcting errors in resampling and unwrap options)
CERTIFY -version 1.0
APRIL 22e 1992
LAS
-version 1.2
REFORMAT -version 2.0
CERTIFY -version 2.0
MAY18e 1992
LAS
-version 1.2
REFORMAT -version 2.0
CERTIFY -version 3.0 (improve data section checking)
JUNE 8e 1992
LAS
-version 1.2
REFORMAT -version 2.1 (fix minor bug in resample. Stop depth set correctly)
CERTIFY -version 3.0
SEPTEMBER 25, 1992
LAS
-version 2.0
REFORMAT -version 2.2 (modified to handle LAS v 2.0)
CERTIFY -version 3.1 (modified to handle LAS v 2.0)
Please address any problems to:
C.W.LS. Floppy Disk Committee
Suite 229, 640 - 5 Avenue, S.W.
Calgary, Alberta T2P 3G4
Canada
-19 -
BLANK PAGE
ATTACHMENT 4: EXAMPLE OF ACCEPTABLE DATA IN UNWRAPPED MODE
-VERSION INFORMATION
VERS.
2. 0
WRAP.
NO
: CWLS LOG ASCII STANDARD VERSION 2.0
: ONE LINE PER DEPTH STEP
f--------------------------------------------------------------------------
-WELL INFORMATION
IMNEM.UNIT
VALUE/NAME
1--------STRT.M
DESCRIPTION
----------
----------:START DEPTH
2861.0000
2000.0000
-0.2500
-.999.2500
STOP.M
STEP.M
NULL.
COMP.
WELL.
FLD .
LOC .
PROVo
SRVC.
DATE.
OWl .
LIC .
GOOD OIL COMPANY
GOOD NONAME 1-11-65-5
NONAME
1-11-65-5W5
ALBERTA
FBN LOGGING COMPANY
03-SEP-92
100011106505W500
0152569
:STOP DEPTH
: STEP
:NULL VALUE
: COMPANY
: WELL
: FIELD
: LOCATION
: PROVINCE
: SERVICE COMPANY
:LOG DATE
:UNIQUE WELL ID
:LICENCE NUMBER
IMNEM.UNIT
API
CURVE DESCRIPTION
DT .US/M
SFLA.OHMM
ILM .OHMM
ILD .OHMM
SP .MV
GR . GAP I
00
60
07
07
07
07
07
1--------------------------------------------------------------------------CURVE INFORMATION
f--------DEPT.M
001
520
222
120
120
010
310
00
32
01
44
46
01
01
00
00
00
00
00
00
00
----------------: 1 DEPTH
:2
:3
:4
:5
:6
:7
SONIC TRANSIT TIME
SHALLOW RESISTIVITY
MEDIUM RESISTIVITY
DEEP RESISTIVITY
SPONTANEOUS POTENTIAL
GAMMA RAY
1--------------------------------------------------------------------------PARAMETER INFORMATION
MATR.
0
:NEUTR MATRIX (O=LlME l=SS 2-DOL)
MDEN . KG/M3
2710.0
:MATRIX DENSITY
DFD .KG/M3
1525.0
:DRILL FLUID DENSITY
IERCB REQUIRED INFORMATION------------------------------------------------RUN .
01
: RUN NUMBER
GL .M
805.20
:GROUND LEVEL ELEVATION .
DREF .
KB
: DEPTH REFERENCE (E. G. KB, DF)
EREF.M
809.60
:ELEVATION OF DEPTH REFERENCE
TDL .M
2861.00
:TOTAL DEPTH LOGGER
TDD .M
2865.00
:TOTAL DEPTH DRILLER
CSGL.M
296.20
:CASING BOTTOM LOGGER
CSGD . M
296 • 00
: CASING BOTTOM DRILLER
CSGS.MM
244
:CASING SIZE
CSGW.KG/M
53.00
:CASING WEIGHT
BS .MM
222
:BIT SIZE
MUD .
GEL CHEM
:MUD TYPE
MUDD.KG/M3
1100.00
:MUD DENSITY
MUDV.SEC/L
92
:MUD VISCOSOTY
FL .ML/30MIN
9.60
:FLUID LOSS
PH
9.50
:PH
MUDS.
FLOW LINE
:MUD SOURCE
RM .OHMM
1. 600
:RESISTIVITY OF MUD
RMT .DEGC
30.0
:TEMPERATURE OF MUD
RMF .OHMM
1.200
:REST. OF MUD FILTRATE
RMFT.DEGC
30.0
:TEMP OF MUD FILTRATE
Page A4-1
RMC .OHMM
1.800
:REST. OF MUD CAKE
RMCT . DEGC
27 . 0
: TEMP. OF' MUD CAKE
TMAX.DEGC
83.0
:MAX RECORDED TEMP.
TIMC.DAY/HR
24/1400
:DATE/TIME CIRCULATION STOPPED
TIML.DAY/HR
25/0330
:DATE/TIME LOGGER TAGGED BOTTOM
UNIT.
334
: LOGGING UNIT NUMBER
BASE.
GRANDE PRAIRIE
:HOME BASE OF LOGGING UNIT
ENG .
BELL
: RECORDING ENGINEER
WIT .
BOSS
: WITNESSED BY
f-------------------------------------------------------~------------------OTHER INFORMATION
4 FIELD PRINTS
6 FINAL PRINTS
f-------------------------------------------------------------------------DT
SFLA
ILM
ILD
SP
GR
-A DEPTH
2861.000
2860.500
2860.000
2859.500
2859.000
2858.500
2858.000
2857.500
2857.000
2856.500
2856.000
2855.500
2855.000
2854.500
2854.000
2853.500
2853.000
2852.500
2852.000
2851.500
2851.000
2850.500
2850.000
2849.500
2849.000
2848.500
2848.000
2847.500
2847.000
2846.500
2846.000
2845.500
2845.000
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
78.1250
78.1250
78.1250
78.1250
78.1250
78.125Q
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78~1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
Page A4-2
ATTACHMENT 5: EXAMPLE OF ACCEPTABLE DATA IN WRAPPED MODE
-VERSION INFORMATION
VERS.
2.0
WRAP.
YES
:CWLS LOG ASCII STANDARD VERSION 2.0
:MULTIPLE LINES PER DEPTH STEP
f--------------------------------------------------------------------------WELL INFORMATION
fMNEM.UNIT
VALUE/NAME
DESCRIPTION
STRT.M
STOP.M
STEP.M
NULL.
COMPo
WELL.
FLD .
LOC .
PROVo
SRVC.
DATE.
UWI .
LIC .
2861.0000
2000.0000
-0.2500
-999.2500
GOOD OIL COMPANY
GOOD NONAME 1-11-65-5
NONAME
1-11-65-5W5
ALBERTA
FBN LOGGING COMPANY
03-SEP-92
100011106505W500
0152569
:STOP DEPTH
: STEP
:NULL VALUE
: COMPANY
: WELL
: FIELD
: LOCATION
: PROVINCE
: SERVICE COMPANY
:LOG DATE
:UNIQUE WELL ID
:LICENCE NUMBER
fMNEM.UNIT
API
DT .US/M
SFLA.OHMM
ILM .OHMM
ILD .OHMM
SP .MV
GR . GAP I
00
60
07
07
07
07
07
f---------
----------
----------:START DEPTH
f--------------------------------------------------------------------------CURVE INFORMATION
f--------DEPT.M
CURVE DESCRIPTION
001
520
222
120
120
010
310
00
32
01
44
46
01
01
00
00
00
00
00
00
00
----------------:1 DEPTH
:2
:3
:4
:5
:6
:7
SONIC TRANSIT TIME
SHALLOW RESISTIVITY
MEDIUM RESISTIVITY
DEEP RESISTIVITY
SPONTANEOUS POTENTIAL
GAMMA RAY
f--------------------------------------------------------------------------PARAMETER INFORMATION
MATR.
0
:NEUTR MATRIX (O=LlME l=SS 2-DOL)
MDEN.KG/M3
2710.0
:MATRIX DENSITY
DFD .KG/M3
1525.0
:DRILL FLUID DENSITY
fERCB REQUIRED INFORMATION------------------------------------------------RUN .
01
: RUN NUMBER
GL .M
805.20
:GROUND LEVEL ELEVATION
DREF .
KB
: DEPTH REFERENCE (E. G. KB, DF)
EREF.M
809.60
:ELEVATION OF DEPTH REFERENCE
TDL .M
2861.00
:TOTAL DEPTH LOGGER
TDD .M
2865.00
:TOTAL DEPTH DRILLER
CSGL.M
296.20
:CASING BOTTOM LOGGER
CSGD.M
296.00
:CASING BOTTOM DRILLER
CSGS.MM
244
:CASING SIZE
CSGW.KG/M
53.00
:CASING WEIGHT
BS .MM
222
:BIT SIZE
MUD .
GEL CHEM
:MUD TYPE
MUDD.KG/M3
1100.00
:MUD DENSITY
MUDV.SEC/L
92
:MUD VISCOSOTY
FL .ML/30MIN
9.60
:FLUID LOSS
PH
9.50
:PH
MUDS.
FLOW LINE
:MUD SOURCE
RM .OHMM
1.600
:RESISTIVITY OF MUD
RMT .DEGC
30.0
:TEMPERATURE OF MUD
RMF .OHMM
1.200
:REST. OF MUD FILTRATE
RMFT .DEGC
30.0
:TEMP OF MUD FILTRATE
Page AS-l
RMC .OHMM
RMCT . DEGC
'TMAX.DEGC
TIMC.DAY/HR
TIML.DAY/HR
UNIT.
BASE.
ENG .
WIT .
1.800
27 • 0
83.0
24/1400
25/0330
334
GRANDE PRAIRIE
BELL
BOSS
:REST. OF MUD CAKE
: TEMP. OF MUD CAKE
:MAX RECORDED TEMP.
:DATE/TIME CIRCULATION STOPPED
:DATE/TIME LOGGER TAGGED BOTTOM
:LOGGING UNIT NUMBER
: HOME BASE OF LOGGING UNIT
:RECORDING ENGINEER
: WITNESSED BY
#--------------------------------------------------------------------------
-OTHER INFORMATION
4 FIELD PRINTS
6 FINAL PRINTS
#--------------------------------------------------------------------------
-A DEPTH DT SFLA ILM ILD SP
2861.000
406.00 2.5262
2.4769
2860.500
406.00 2.5262
2.4769
2860.000
406.00 2.5262
2.4769
2859.500
406.00 2.5262
2.4769
2859.000
406.00 2.5262
2.4769
2858.500
406.00 2.5262
2.4769
2858.000
406.00 2.5262
2.4769
2857.500
406.00 2.5262
2.4769
2857.000
406.00 2.5262
2.4769
2856.500
406.00 2.5262
2.4769
2856.000
406.00 2.5262
2.4769
2855.500
406.00 2.5262
2.4769
2855.000
406.00 2.5262
2.4769
2854.500
406.00 2.5262
2.4769
2854.000
406.00 2.5262
2.4769
2853.500
406.00 2.5262
2.4769
2853.000
406.00 2.5262
2.4769
2852.500
406.00 2.5262
2.4769
2852.000
406.00 2.5262
2.4769
2851.500
406.00 2.5262
2.4769
2851.000
406.00 2.5262
2.4769
2850.500
406.00 2.5262
2.4769
2850.000
406.00 2.5262
2.4769
2849.500
GR
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.075~
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
2.0758
-0.5005
78.1250
Page AS-2
406.00
2849.000
406.00
2848.500
406.00
2848.000
406.00
2847.500
406.00
2847.000
406.00
2846.500
406.00
2846.000
406.00
2845.500
406.00
2845.000
406.00
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
2.5262
2.4769
2.0758
-0.5005
78.1250
Page AS-3
BLANK PAGE
ATTACHMENT 6: EXAMPLE OF UNACCEPTABLE (MERGED) DATA
-VERSION INFORMATION
VERS.
2.0
: CWLS LOG ASCII STANDARD VERSION 2.0
WRAP.
NO
: ONE LINE PER DEPTH STEP
if
-WELL INFORMATION
ifMNEM.UNIT
VALUE/NAME
DESCRIPTION
if---------------------------STRT.M
2861.0000
: START DEPTH
STOP.M
2859.7500 .
:STOP DEPTH
STEP.M
-0.2500
:STE~
·NULL.
-999.2500
:NULL VALUE
COMP.
GOOD OIL COMPANY
: COMPANY
WELL.
GOOD NONAME 1-ll-65-5
: WELL
FLD .
NONAME
: FIELD
LOC .
1-11-65-5W5
: LOCATION
PROVo
ALBERTA
: PROVINCE
SRVC.·
FBN LOGGING COMPANY
:SERVICE COMPANY
DATE.
03-SEP-92
:LOG DATE
UNI •
100011106505W500
:UNIQUE WELL ID
LIC .
0152569
:LICENCE NUMBER
if--------------------------------------------------------------------------CURVE INFORMATION
ifMNEM.UNIT
API
CURVE DESCRIPTION
if------------------------DEPT.M
00 001 00 00
: 1 DEPTH
DT .US/M
60 520 32 00
:2 SONIC TRANSIT TIME
SFLA.OHMM
07 222 01 00
:3 SHALLOW RESISTIVITY
ILM .OHMM
07 120 44 00
:4 MEDIUM RESISTIVITY
07 120 46 00
:5 DEEP RESISTIVITY
ILD .OHMM
SP .MV
07 010 01 00
:6 SPONTANEOUS POTENTIAL
GR . GAP I
07 310 01 00
:7 GAMMA RAY
if--------------------------------------------------------------------------PARAMETER INFORMATION
MATR.
0
:NEUTR MATRIX (O=LIME l=SS 2=DOL)
MDEN .KG/M3
2710.0
:MATRIX DENSITY
DFD .KG/M3
1525.0
:DRILL FLUID DENSITY
ifERCB REQUIRED INFORMATION------------------------------------------------RUN .
01
:RUN NUMBER
DATE.
01-AUG-92
:LOG DATE
GL .M
805.20
:GROUND LEVEL ELEVATION
DREF.
KB
:DEPTH REFERENCE (E.G. KB,DF)
809.60
:ELEVATION OF DEPTH REFERENCE
EREF.M
TDL .M
1000.00
:TOTAL DEPTH LOGGER
TDD .M
1001.00
:TOTAL DEPTH DRILLER
CSGL.M
296.20
:CASING BOTTOM LOGGER
CSGD.M
296.00
:CASING BOTTOM DRILLER
CSGS.MM
244
:CASING SIZE
CSGW.KG/M
53.00
:CASING WEIGHT
BS .MM
222
:BIT SIZE
MUD .
GEL CHEM
:MOD TYPE
MUDD.KG/M3
1100.00
:MOD DENSITY
MUDV.SEC/L
92 .
:MOD YISCOSOTY
FL .ML/30MIN
9.60
:FLUID LOSS
PH
9.50
:PH
MUDS.
FLOW LINE
:MOD SOURCE
RM .OHMM
1. 600
:RESISTIVITY OF MUD
RMT .DEGC
30.0
:TEMPERATURE OF MOD
RMF .OHMM
1.200
:REST. OF MOD FILTRATE
Page A6-1
RMFT.DEGC
30.0
:TEMP OF MUD FILTRATE
RMC .OHMM
1.800
:REST. OF MUD CAKE
RMCT.DEGC
27.0
:TEMP. OF MUD CAKE
TMAX.DEGC
30.0
:MAX RECORDED TEMP.
TIMC.DAY/HR
10/1500
:DATE/TIME CIRCULATION STOPPED
TIML.DAY/HR
11/0430
:DATE/TIME LOGGER TAGGED BOTTOM
UNIT.
201
:LOGGING UNIT NUMBER
BASE.
GRANDE PRAIRIE
:HOME BASE OF LOGGING UNIT
ENG .
LUKEWARM
:RECORDING ENGINEER
WIT .
FOS
: WITNESSED BY
JERCB REQUIRED INFORMATION------------------------------------------------RUN .
02
: RUN NUMBER
DATE.
22-AUG-92
:LOG DATE
GL .M
805.20
:GROUND LEVEL ELEVATION
DREF.
KB
:DEPTH REFERENCE (E.G. KB,DF)
EREF.M
809.60
:ELEVATION OF DEPTH REFERENCE
2000.00
:TOTAL DEPTH LOGGER
TDL .M
TDD .M
2001.00
:TOTAL DEPTH DRILLER
1000.20
:CASING BOTTOM LOGGER
CSGL.M
1000.00
:CASING BOTTOM DRILLER
CSGD.M
CSGS.MM
244
:CASING SIZE
53.00
:CASING WEIGHT
CSGW.KG/M
222
:BIT SIZE
BS .MM
GEL CHEM
:MUD TYPE
MUD .
1100.00
:MUD DENSITY
MUDD.KG/M3
MUDV.SEC/L
89
:MUD VISCOSOTY
FL .ML/30MIN
9.00
:FLUID LOSS
PH
8.50
:PH
MUDS.
FLOW LINE
:MUD SOURCE
RM .OHMM
1.550
:RESISTIVITY OF MUD
RMT .DEGC
30.0
:TEMPERATURE OF MUD
RMF .OHMM
1.3"00
:REST. OF MUD FILTRATE
RMFT.DEGC
30.0
:TEMP OF MUD FILTRATE
2.100
:REST. OF MUD CAKE
RMC .OHMM
RMCT.DEGC
27.0
:TEMP. OF MUD CAKE
TMAX.DEGC
75.0
:MAX RECORDED TEMP.
TIMC.DAY/HR
24/0200
:DATE/TIME CIRCULATION STOPPED
TIML.DAY/HR
25/0700
:DATE/TIME LOGGER TAGGED BOTTOM
334
:LOGGING UNIT NUMBER
UNIT.
GRANDE PRAIRIE
:HOME BASE OF LOGGING UNIT
BASE.
ENG .
OOPS
:RECORDING ENGINEER
WIT •
KNOWITALL
:WITNESSED BY
JERCB REQUIRED INFORMATION------------------------------------------------03
:RUN NUMBER
RUN •
03-SEP-92
:LOG DATE
DATE.
805.20
:GROUND LEVEL ELEVATION
GL .M
KB
:DEPTH REFERENCE (E.G. KB,DF)
DREF.
809.60
:ELEVATION OF DEPTH REFERENCE
EREF.M
2861.00
:TOTAL DEPTH LOGGER
TDL .M
2865.00
:TOTAL DEPTH DRILLER
TDD .M
2001.50
:CASING BOTTOM LOGGER
CSGL.M
2001.50
:CASING BOTTOM DRILLER
CSGD.M
244
:CASING SIZE
CSGS.MM
53.00
:CASING WEIGHT
CSGW.KG/M
222
:BIT SIZE
BS .MM
GEL CHEM
:MUD TYPE
MUD .
1100.00
:MUD DENSITY
MUDD.KG/M3
94
:MUD VISCOSOTY
MUDV.SEC/L
9.10
:FLUID LOSS
FL .ML/30MIN
9.00
:PH
PH
FLOW LINE
:MUD SOURCE
MUDS.
1.650
:RESISTIVITY OF MUD
RM .OHMM
Page A6-2
RMT .DEGC
RMF .OHMM
RMFT .DEGC
RMC .OHMM
,RMCT . DEGC
TMAX.DEGC
TIMC.DAY/HR
TIML.DAY/HR
UNIT.
BASE.
ENG.
WIT .
30.0
1.100
30.0
1. 900
29 . 0
83.0
01/1800
02/0700
366
GRANDE PRAIRIE
IZOK
KNOWNO
:TEMPERATURE OF MOD
:REST. OF MOD FILTRATE
: TEMP OF MOD FILTRATE
: REST. OF MOD CAKE
: TEMP. OF MOD CAKE
:MAX RECORDED TEMP.
:DATE/TIME CIRCULATION STOPPED
:DATE/TIME LOGGER TAGGED BOTTOM
:LOGGING UNIT NUMBER
:HOME BASE OF LOGGING UNIT
:RECORDING ENGINEER
:WITNESSED BY
#--------------------------------------------------------------------------OTHER INFORMATION
4 FIELD PRINTS
6 FINAL PRINTS
#-------------------------------------------------------------------------DT
SFLA
ILM
ILD
SP
GR
-A DEPTH
2861.000
2860.500
2860.000
2859.500
2859.000
2858.500
2858.000
2857.500
2857.000
2856.500
2856.000
2855.500
2855.000
2854.500
2854.000
2853.500
2853.000
2852.500
'2852.000
2851.500
2851.000
2850.500
2850.000
2849.500
2849.000
2848.500
2848.000
2847.500
2847.000
2846.500
2846.000
2845.500
2845.000
2844.500
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00,2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
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406.00
2.5262
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406.00
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406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
406.00
2.5262
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
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2.4769
2.4769
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2.4769
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2.4769
2.4769
2.4769
2.4769
2.0758
2.0758
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2.0758
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2.0758
2.0758
2.0758
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2.0758
2.0758
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2.0758
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2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.5005
78.1250
-0.-5005
78.1250
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78.1250
-0.5005
78.1250
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-0.500~
78.1250
-0.5005
78.1250
-0.5005
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78.1250
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78.1250
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-0.5005
78.1250
Page A6-3
BLANK PAGE
ATTACHMENT 7: EXAMPLE OF UNACCEPTABLE (ZONED) DATA
-VERSION INFORMATION
VERS.
2.0
WRAP.
NO
: CWLS LOG ASCII STANDARD VERSION 2.0
: ONE LINE PER DEPTH STEP
f--------------------------------------------------------------------------WELL INFORMATION
fMNEM.UNIT
VALUE/NAME
DESCRIPTION
STOP.M
STEP.M
NULL.
COMP.
WELL.
FLD .
LOC .
PROVo
SRVC.
DATE.
OWl .
LIC .
2000.0000
-0.2500
-999.2500
GOOD OIL COMPANY
GOOD NONAME 1-11-65-5
NONAME
1-11-65-5W5
ALBERTA
FBN LOGGING COMPANY
03-SEP-92
100011106505W500
0152569
:STOP DEPTH
: STEP
:NULL VALUE
: COMPANY
: WELL
: FIELD
: LOCATION
: PROVINCE
: SERVICE COMPANY
:LOG DATE
:UNIQUE WELL ID
:LICENCE NUMBER
fMNEM. UNIT
API
CURVE DESCRIPTION
DT .US/M
SFLA.OHMM
ILM .OHMM
ILD .OHMM
SP .MV
GR . GAP I
00
60
07
07
07
07
07
f--------STRT.M
---------2861.0000
----------:START DEPTH
f--------------------------------------------------------------------------CURVE INFORMATION
f--------DEPT.M
001
520
222
120
120
010
310
00
32
01
44
46
01
01
00
00
00
00
00
00
00
----------------: 1 DEPTH
:2
:3
:4
:5
:6
:7
SONIC TRANSIT TIME
SHALLOW RESISTIVITY
MEDIUM RESISTIVITY
DEEP RESISTIVITY
SPONTANEOUS POTENTIAL
GAMMA RAY
f--------------------------------------------------------------------------PARAMETER INFORMATION
fERCB REQUIRED INFORMATION------------------------------------------------RUN .
01
: RUN NUMBER
GL .M
805.20
:GROUND LEVEL ELEVATION
DREF .
KB
: DEPTH REFERENCE (E . G. KB, DF)
EREF.M
809.60
:ELEVATION OF DEPTH REFERENCE
TDL .M
2861.00
:TOTAL DEPTH LOGGER
TDD .M
2865.00
:TOTAL DEPTH DRILLER
CSGL.M
296.20
:CASING BOTTOM LOGGER
CSGD.M
296.00
:CASING BOTTOM DRILLER
CSGS.MM
244
:CASING SIZE
CSGW.KG/M
53.00
:CASING WEIGHT
BS .MM
222
:BIT SIZE
MUD .
GEL CHEM
:MUD TYPE
MUDD.KG/M3
1100.00
:MUD DENSITY
MUDV.SEC/L
92
:MUD'VISCOSOTY
FL .ML/30MIN
9.60
:FLUID LOSS
PH
9.50
:PH
MUDS.
FLOW LINE
:MUD SOURCE
RM .OHMM
1. 600
:RESISTIVITY OF MUD
RMT .DEGC
30.0
:TEMPERATURE OF MUD
RMF .OHMM
1.200
:REST. OF MUD FILTRATE
RMFT . DEGC
30.0
: TEMP OF MUD FILTRATE
RMC .OHMM
1.800
:REST. OF MUD CAKE
RMCT.DEGC
27.0
:TEMP. OF MUD CAKE
TMAX.DEGC
83.0
:MAX RECORDED TEMP.
Page A7-1
TIMC.DAY/HR
24/1400
:DATE/TIME CIRCULATION STOPPED
TIML.DAY/HR
25/0330
:DATE/TIME LOGGER TAGGED BOTTOM
UNIT.
334
: LOGGING UNIT NUMBER
BASE.
GRANDE PRAIRIE
: HOME BASE OF LOGGING UNIT
ENG .
BELL
: RECORDING ENGINEER
WIT .
BOSS
: WITNESSED BY
#ZONE ONE INFORMATION-----------------------------------------------------ZONE.
1
: ZONE NUMBER
STRT.M
2861.0000
:START DEPTH (ZONE)
STOP.M
2422.0000
:STOP DEPTH (ZONE)
MATR.
0
:NEUTR MATRIX (Q=LIME l=SS 2=DOL)
MDEN .KG/M3
2710.0
:MATRIX DENSITY
DFD .KG/M3
1525.0
:DRILL FLUID DENSITY .
#ZONE TWO INFORMATION-----------------------------------------------------ZONE.
2
: ZONE NUMBER
STRT.M
2422.0000
:START DEPTH (ZONE)
STOP.M
2000.0000
:STOP DEPTH (ZONE)
MATR.
1
:NEUTR MATRIX (O=LIME l=SS 2=DOL)
MDEN .KG/M3
2650.0
:MATRIX DENSITY
DFD .KG/M3
1511. 0
:DRILL FLUID DENSITY
#--------------------------------------------------------------------------
-OTHER INFORMATION
4 FIELD PRINTS
6 FINAL PRINTS
#-------------------------------------------------------------------------DT
SFLA
ILM
ILD
SP
GR
-A DEPTH
2861.000
2860.500
2860.000
2859.500
2859.000
2858.500
2858.000
2857.500
2857.000
2856.500
2856.000
2855.500
2855.000
2854.500
2854.000
2853.500
2853.000
2852.500
2852.000
2851.500
2851.000
2850.500
2850.000
2849.500
2849.000
2848.500
2848.000
2847.500
2847.000
2846.500
2846.000
2845.500
2845.000
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
406.00
2.5262
2.5262
2.5262
2.5262
2~5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.5262
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769
2.4769.
2.4769
2.4769
2.4769
2.4769
2.0758
2.0758
2.0758
2.0758
2.0758
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2.0758
2.0758
2.0758
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2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
2.0758
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-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
-0.5005
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-0.5005
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-0.5005
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-0.5005
-0.5005
78.1250
78.1250
78.1250
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78.1250
78.1250
78.1250
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78.1250
78.1250
78.1250
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78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
78.1250
Page A7-2