Main Header Page, Top Half
Note: When using HPUTIL plotting packages (HEAD/
MPLOT), carefully inspect the information on your headers. There are character string restrictions which tend to chop off the end of words in customer
information, permanent datum, elevations, and rig name when data are copied over from the M-SERIES Job Data disk.
Service Type
Service type is plotted adjacent to the company logo in the box at the top of the header. Only the services (or log traces) presented on the log should appear in this box. For example, if a triple combo service was run but only DPR data was plotted on the log, then the box should read “Dual
Propagation Resistivity, Gamma Ray.” Any other service that was run but not presented on the log should appear in the “Other Services” box, in this case Neutron Porosity, Density, and Directional Surveys (note that
“Directional” no longer appears in the Service Type box as a default!).
Additionally, there is adequate space to record the hole size or hole section, a common request for international clients who prefer final log distribution for each hole section, as opposed to composite logs for the entire well.
Customer Information
It is very important that the correct customer information be on the final log header. Although you should have reasonable confidence in the information given on the master job sheet, mistakes are common. It is encouraged that you to double and triple check your well information by cross referencing with other sources on the rig. Areas to check are the directional driller's well plot, the mud report, and the IADC report. Give little faith in a sign on the company man's wall with the well information on it or signs on the derrick of the rig. These are seldom updated from well to well, especially for operators who tend to go from well to well very quickly.
Well Numbers
Well numbers may be designated as either No. A-34 or # A-34.
Log Quality and Data Management Standards Headers Field
The “bottom-hole” location block number should always be provided here.
In other words, if the rig is located in block 60, but the bottom-hole location is block 59, use block 59 here. Avoid abbreviations unless a character string overflow exists, which is a common problem here.
County
Once again avoid abbreviations. If the field is offshore, write OFFSHORE.
Country
Country can be abbreviated due to character string restrictions.
Well Location
Always use the surface location coordinates. Make sure to identify clearly these coordinates as “Surface Location.” Double and triple check the block numbers to avoid confusion between surface and bottom-hole locations (this is a common problem!). Well location coordinates can always be found in the well prognosis, which the company man should have. Final logs without well locations will not be accepted. If well locations are not available on the rig site, then call the office. The marketing representative responsible for the account will be contacted.
North America
Lease line coordinates (such as 1250' FEL, 1100' FSL of South Pass Block 65) are typically preferred by the customer. If lease line coordinates are not available, then Lambert coordinates (more commonly referred to as X,Y coordinates) can be used. If lease line coordinates or Lambert coordinates are not available, then latitude and longitude, which is a universal
coordinate system, should be used. Format this as follows:
00deg 00min 00sec North 00deg 00min 00sec East
International
International typically uses longitude and latitude. See the above format for this. Additionally, there is a specific UTM format as follows:
UTM Zone 00 UTM Zone 00
0 000 000.00m North 0 000 000.00ft North 0 000 000.00m East 0 000 000.00ft East
Headers Log Quality and Data Management Standards If the location is related to any other position, such as a platform center, use the oil company format and make note in the “Well Location” stating this (e.g., Ref to Platform Center).
Sect./Twp./Range
This is a terrestrial coordinate system used primarily in the United States.
Lease line coordinates that are used for a “land or onshore” location should be accompanied by this. If this information is not provided at the rigsite, call the office.
API Number
American Petroleum Institute number is used as a well reference number for wells drilled in the United States. Although not required in the past, it is quickly becoming a standard part of the log header among many
companies. If they do not have this information on location, call the office.
Other Services
This space is designated to list other measurements or services used but not provided on the log. In the past, we used this to designate things such as pore pressure detection, etc. If you notice the header pic.fil has been changed, directional has been omitted from the header. Therefore,
“Directional Surveys” should be included in the other services box.
When triple combo logs are generated, the modular neutron porosity and modular density lithology traces are typically excluded from the
correlation log presentation but provided on the quantitative log presentation. Therefore, when plotting the correlation log for these
services, “Modular Neutron Porosity” and/or “Modular Density Lithology”
should be listed in the other services box.
Drilling Information
Log is measured from R.K.B. (Rotary Kelly Bushing) unless a top drive is used, then log is measured from D.F. (drill floor). This should be followed by elevation above permanent datum (this value should match the values in the “Elevation” box).
Example: Log measured from R.K.B., 92 ft Above Perm. Datum.
Elevation KB 92 ft.
Permanent Datum will have to be abbreviated as M.S.L. for mean sea level and G.L. for ground level (land locations). All numbers that represent depths should be followed by abbreviated units (for example: 8080 ft).
All dates should be expressed as DD MMM YY. Make sure your “depth in” on the header is the depth at which “Formation Evaluation Logging Services” begin, not where “Directional Services” begin.
Log Quality and Data Management Standards Headers Elevation Information
“Elev. KB” is the elevation of the kelly bushing above the permanent datum (i.e., if you are offshore, the permanent datum would be mean sea level). However, in some areas, this number represents the elevation of the kelly bushing above the sea bed (i.e., the number is the summation of water depth and the elevation of the kelly bushing above mean sea level). The Elev. KB is always listed as one foot higher than Elev. DF (elevation of the drill floor). Both of these are displayed as positive numbers. If you are drilling with a top drive unit, you will reference your depth from the drill floor; therefore list “Elev. KB” as N/A.
“Water depth/GL” is the water depth (offshore) or elevation of ground level above sea level (onshore) at the rigsite. If you are on a land job, it is very important that you obtain the ground elevation at the rigsite. If it is not available at the rigsite, call either the geologist or engineer watching the well. If they are not available, call the office. The Marketing Rep or Technical Rep will be contacted and requested to obtain the information.
Both of these numbers are usually listed as positive numbers, although local variations may exist. Consult company geologists for guidance if it is unclear how to represent the elevation information.
Note: This information must be accurate. It is used by
geologists to compensate for differences in depth between logs. These differences occur when wells are logged on rigs with different air gaps and water depths. Knowing the elevation of the kelly bushing and the correct water depth allows geologists to reference all logs to a permanent datum. This is essential for accurate depth correlation between logs.
Main Header Page, Bottom Half Borehole Record
All borehole size numbers are expressed in inches (in.) and all depths expressed as abbreviated units (for example: 8080 ft). Avoid expressing inches in decimal form (such as 10.75 in.). The conventional method is preferred (such as 10-3/4 in.). Always begin your borehole record from the first hole section.
Casing Record
All casing size numbers are expressed in inches (in.) and all depths expressed as abbreviated units (for example: 8080 ft). As with Borehole Record, avoid expressing inches in decimal form. Additionally, begin the casing record from the first hole section; typically this would be drive pipe.
Headers Log Quality and Data Management Standards Drilling Contractor/Rig
Avoid abbreviating the name of the drilling contractor or the rig whenever possible. However, there are character string restrictions in “Rig” so list only the rig name or number. For example, instead of Zapata Yorktown, list it as Yorktown.
Log Type/Scale
The Make Log configuration menu in HPUTIL gives you the capability to manually modify some options such as log scale (e.g., modify 1:1200 to read 1 IN = 100 FT). Use the default setting unless otherwise requested by the client.
Print Type
Options are field or final print. Any log prints left on location at the end of a job should have field print headers. Any logs that are intended to be distributed to the customer from the office at the completion of a job will have final print headers. However, any final logs distributed to the
customer without the proper quality assurance checks will have field print headers. Final field prints should never be made with miniheaders.
Company Representative/Teleco Representative
It is recommended that both first and last names be listed. Where
appropriate, first initials may be substituted for the first name. Likewise, first initials or first name may be preceded by “Mr.” Most importantly, make sure the spelling of company personnel is correct.
Job Number
Double check to make sure that the correct job number is represented.
Main Header, Bit Run Summary
Always make sure that bit numbers are accurately listed. Bit numbers are easily found on the IADC report in the company man or tool pushers office. List rerun bits with the number of the bit followed by RR (i.e., 8RR).
Surface Gear
Do not use Teleco run codes (such as MCC or MCB) to list surface gear.
Surface gear should be listed as TR-3201 or TR 2306.
Log Quality and Data Management Standards Headers Eastman Teleco OD/Type
Because of a lack of space, inches must be expressed using a quotation mark ( ” ) instead of the conventional (in.). Avoid expressing inches in decimal form (such as 7.75 in.); use the conventional method (7-3/4”). Use the standard Teleco three-letter abbreviation for tool type (such as RGD).
Run Data
All depths should be expressed as abbreviated units (for example: 8080 ft).
Use conventional standards to express bit diameter as inches (such as 9-7/8 in.). Log times should be expressed as hh:mm (such as 05:30 hrs).
Always follow up time numerics with hrs. Dates should be expressed as DD MMM YY (14 FEB 92). Measured “Depth In/Out” is bit depth. “Top/
Bottom Interval Logged” should be the depth of the F.E. sensor, which is closest to the bit. For example, in a standard triple combo configuration, this will be the DPR sensor.
Mud Data
Because of a lack of space, mud type will have to be abbreviated such as lignosulfonate (Ligno) or polymer (Poly). Chloride counts should always be followed by abbreviated units (e.g., parts per million abbreviated
“ppm”). Eventually this will be moved to the Environmental Parameters page.
Water Loss
Water loss and mud filtrate are synonymous. Mud filtrate can be found on the mud report. The units for water loss are cc/30min, which can be abbreviated as cc. Eventually this will be moved to the Environmental Parameters page.
Rm @ Temp
List surface recorded mud resistivities and temperatures. Most customers prefer to make there own environmental corrections. Providing the
customer with mud resistivities that have already been corrected for depth does not permit this option. See “Main Header, Environmental Parameters”
on page 3-8 on the method for collecting and measuring mud data.
Company Representative/Eastman Teleco Field Engineer
List the company representative and Teleco field engineer who was on location during the course of that particular run. There is not much space provided for this information, so first initials may be necessary. There is enough room for one engineer's name. Therefore, it has been left optional to the engineers on location to alternate their names with each run. If the
Headers Log Quality and Data Management Standards last names of both engineers are short, you may be able to list both for each run (such as Jones/Smith).
Main Header, Equipment Equipment Serial Numbers
Record individual serial numbers for each sub, source, detector, etc. “Drill Collar Number” is redundant with Eastman Teleco DHA No. in the Bit Run Summary (this will be removed in later versions of software).
“Modular Assembly No.” should begin with “1” for the first Modular Assembly used and incremented sequentially only when the modular assembly changes between runs. For example, one modular assembly was used for three runs (no changes in the assembly were made in between runs). The number “1” should appear in the columns for the first three runs.
However, prior to running in the hole for run number four, the neutron sub was exchanged. Then a “2” should appear in the column for run number four. These numbers will correspond to modular tool diagrams that will be plotted out on the header (this capability is scheduled for a later P-SERIES release).
Sensor Offsets to Bit/Memory Acquisition Rates
Sensor offset is the distance of the sensor to the bit. Additionally, place memory acquisition rates for sensors here. Remember, the MDL and MNP acquisition rates are not the same as DPR.
Other Tool Information
Disregard “Total Weight” and “Stab/Location.” Fill in with N/A.
Main Header, Environmental Parameters
Rm and Rmfshould be recorded at least twice a day, or anytime mud weight, potassium content, or chloride content of the mud system changes. This can become significant when drilling into salt or changing a mud system over from fresh to salt saturated. These data should be documented on the miniheaders of daily logs (see “Miniheader” on page 3-1) as well as the full header for final logs.
Note: Rm and Rmfshould always be recorded from a meter. Do not calculate these from mud chlorides. This may result in inconsistent results. Once the surface measurement has been made, correct Rmand Rmffor the bottom hole circulating temperature (CDS temperature) using Arp's equation. Present these parameters on the Environmental Parameters page as Rmand Rmf@ BHCT (bottom hole
Log Quality and Data Management Standards Headers circulating temperature). Also record the measured depth of the BHCT. In order to guarantee consistency in your measurement of Rm , it is recommended to allow the mud sample to cool to surface temperature (i.e., room
temperature, typically 75 to 80°F) before measuring the mud resistivity. The mud filtrate should be easily
collected from the mud engineer on location.
It is important that both measurements ( Rmand Rmf) be taken from mud that has been collected from the same location. By convention, mud samples for these measurements should be collected from the flowline.
However, your mud sample should be consistent with where the mud engineer (who is providing you with filtrate samples) collects his sample.
Check with the mud engineer for his collection point. If he is sampling only from the active pit, then take your samples from the active pit. If he is sampling from both the active pit and the flowline, request filtrate from the flowline.
Once you have established a sample location, maintain that same location for the duration of the job. The key is consistency!
Main Header, Calibration Verification
Note: See P-SERIES 2.0 Operators Guide, Chapter 10, Displays/Reports/Logs
DPR
Calibration verification data is captured in the P-SERIES database and automatically displayed in the Calibration Verification page from the Displays/Reports/Logs menu. Select Calibration Verification, then press [F9] for “Getdata.”
Gamma Ray
Calibration verification data is captured in the P-SERIES database and automatically displayed in the Calibration Verification page from the Displays/Reports/Logs menu. Select Calibration Verification, then press [F9] for “Getdata.”
Neutron Porosity
Calibration verification data is captured in the P-SERIES database and automatically displayed in the Calibration Verification page from the Displays/Reports/Logs menu. Select Calibration Verification, then press [F9] for “Getdata.”
Headers Log Quality and Data Management Standards Density
Calibration verification data is captured in the P-SERIES database and automatically displayed in the Calibration Verification page from the Displays/Reports/Logs menu. Select Calibration Verification, then press [F9] for “Getdata.”
Main Header, Remarks Mnemonics
At the top of the remarks page should be a listing of the mnemonics used on the log. See Appendix A for an updated listing of the mnemonics for M-SERIES 1.33 and P-SERIES 2.01. Use the mnemonics definitions provided in Appendix A for the mnemonics listing on the Remarks page.
Remarks
The objective of the remarks page is to document as clearly as possible any events that might affect the measurement of our sensors. We want to ensure, in our documentation, that we eliminate ambiguities, not add to them. Therefore, take time to organize your remarks. (It becomes obvious when you do not!) Please make note of the example header formats. You should attempt to follow these as accurately as possible.
List only those remarks that are relevant to the log. For example, it is not necessary to list the number of Directional Only runs prior to logging runs.
Also provide a space in between each remark for easier reading.
Remarks should be numerically listed and referenced on the log with a
“See Remark,” etc. Organize the remarks so they are listed sequentially with depth. In other words, remark number 3 should not reference a depth that is shallower than remark number 2.
Your documentation should be written for the geologist or petrophysicist who will be analyzing this data six months from now and may not be familiar with the drilling operations that took place on the rig. So be concise and avoid using rig slang during documentation. For example, instead of saying the hole was backlogged or backreamed on the way in the hole, write: “The interval from 2020 to 2040 ft was logged while reaming during the trip in the hole for run No. 1. Bottom drilling and logging began at 2040 ft.” This clarifies when, where, and what events took place.
• Include both measured depth and TVD depths when referencing specific depth intervals. List measured depths first, followed by TVD depths in parentheses. For example, 8400 to 8900 ft MD (7200 to 7600 ft TVD).
Log Quality and Data Management Standards Headers
• Items that should be documented in the Remarks page * are as follows:
1. Casing depth of driller / casing depth of logger: Traditionally, there is almost always a discrepancy between the driller's casing depth and an open hole logger’s casing depth. Always record the driller’s casing depth and below it indicate where Teleco logged out of casing. Additionally, always place casing labels at the depth where Teleco logged out of casing, not the driller’s casing depth. This means you must enter the depth where Teleco logs out of casing under casing data on the main header page. This is the depth MPLOT uses to place casing labels on the log.
1. Casing depth of driller / casing depth of logger: Traditionally, there is almost always a discrepancy between the driller's casing depth and an open hole logger’s casing depth. Always record the driller’s casing depth and below it indicate where Teleco logged out of casing. Additionally, always place casing labels at the depth where Teleco logged out of casing, not the driller’s casing depth. This means you must enter the depth where Teleco logs out of casing under casing data on the main header page. This is the depth MPLOT uses to place casing labels on the log.