1、Standard Form for Hardcopy Presentation of Downhole Well Log DataAPI RECOMMENDED PRACTICE 31AFIRST EDITION, AUGUST 1997REAFFIRMED, JANUARY 2012Standard Form for HardcopyPresentation of DownholeWell Log DataExploration and Production DepartmentAPI RECOMMENDED PRACTICE 31AFIRST EDITION, AUGUST 1997REA
2、FFIRMED, JANUARY 2012STD-API/PETRO RP 3lA-ENGL 1777 0732270 05b8244 384 Development of Recommended Practice 3 1A was initiated by the API Executive Commit- tee on Drilling and Production Practices. This document was prepared by the API Subcom- mittee on Standard Format for Electromagnetic Logs. This
3、 document was derived in part from API Recommended Practice 31, which was orig- inally adopted in 1947, and revised in 1967. Recommended Practice 31 is being superseded by API Recommended Practice 31A. API Recommended Practice 31A provides significant enhancements to both the content and format of t
4、he standard log heading and data presenta- tion sections of the original API Recommended Practice 3 1. The revised heading will allow more complete and convenient reporting of data that should accompany each log in order to facilitate its comct interpretation and use. The revised format has been des
5、igned to apply not only to electric logs, but also to all wireline-logging measurements commonly obtained in either cased or open holes. Additionally, the revised format applies to downhole measure- ments obtained while drilling. Together these changes will allow greater ease of merging information
6、from multiple logging runs, or from multiple tools in a single run. The recommendations within API Recommended Practice 31A have been developed to apply to a wide range of commonly obtained logging measurements. Additional recommen- dations regarding content and format of data presentation may be co
7、ntained in other API documents relating to specific classes of logging measurements. Finally, all of the informa- tion content recommended within API Recommended Practice 31A for hardcopy presenta- tion is recommended also for inclusion within digital presentation of the same well log data. The reco
8、mmended digital formats to be used are provided in API Recommended Practice 66. API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; how- ever, the Institute makes no representation
9、, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or dam- age resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict. Suggested revisions ar
10、e invited and should be submitted to the director of the Explora- tion and Production Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005. iii . STD.API/PETRO RP 3LA-ENGL 1777 0732270 05b8245 2LO CONTENTS Page 1 SCOPE . 1 2 REFERENCES 1 3 STANDARDHEADING 1 3.1 Intro
11、duction . 1 3.2 General Information 1 3.3 Cover Panel . : . 2 3.4 Well Logging Operations Panel . 2 3.5 Special Notifications and Remarks Panel . 3 3.6 Borehole Fluid Data Panel . 7 3.7 Wellbore Diagrams 10 3.8 Equipment Data Panel . 10 3.9 Instrument Diagram Panel 10 3.10 Curve Specification Panel
12、11 4 STANDARDLOGRECO RD 11 4.1 LogFormat 11 4.2 Organization of Hardcopy Information 16 4.3 Calibration and Quality Assurance Records 18 Figures 1 Cover Panel Format (Portrait) . 4 2 Cover Panel Format (Landscape) . 5 3 Well Logging Operations Panel . 6 4 Special Notification and Remarks Panel 8 5 B
13、orehole Fluid Data Panel . 9 6 Wellbore Diagram 12 7 Completion Design . 13 8 Equipment Data/instrument Diagram Panel 14 9 10 StandardLogReCord . 17 Equipment DaWInstrument Panel (MWD Version) 15 Tables 1 Curve Specification Panel 16 V STD-APIIPETRO RP 3LA-ENGL 1997 0732270 05bA29b 157 Standard Form
14、 for Hardcopy Presentation of Downhole Well Log Data 1 Scope The variety, use, and value of log recordings of subsurface properties have been greatly increased and expanded since the last revision of Recommended Practice 3 1. A wide diver- sity of log measurements (from both open and cased hole) are
15、 routinely being combined to interpret the original status of newly drilled wells and to evaluate performance and potential throughout each wells life. Standardization of the log form and data presentation will allow the user to conveniently com- bine log data from various devices and dates. Recogni
16、zing the wide variability in the tools covered by these recosnmenda- tions, this document attempts to preserve flexibility wherever possible. The format selected allows for presentation of data that can be measured as a series of values at specified well depths. Consequently, this document can be ea
17、sily applied to most logging measurements, and will serve as a reference document to technology-specific documents. This document makes no recommendations concerning the standard log record (refer to Section 4) for measurements that are data series at individual depths (for example, pressure transie
18、nts, video images, sonic traces, and so forth). To the extent that recommended practices for the presentation of such data are appropriate, they should be included within separate Recom- mended Practices for the technologies involved. In addition to the recommendations concerning the format for pres
19、entation of log data, this document provides several enhancements to the standard log heading. These changes are designed to provide the user with a more complete set of information in consistent locations on all logs. Due to the increasing use of tool calibration and data processing while logging,
20、recommendations are provided concerning docu- mentation of equipment history and processing software. One should identify tool-specific information in other appropriate recommended publications. The recommended additions to the content of the support information included with hardcopy presentations
21、of well log data, as described in the following, should also be included with digital recordings of the same well logs. The recom- mended digital formats to be used are provided in API Rec- ommended Practice 66. The recommendations contained within API Recom- mended Practice 31A provide some flexibi
22、lity regarding the dimensions of the actual print field used in the hardcopy pre- sentation of well log data. This flexibility will accommodate the use of commonly available printers and paper sizes as optional alternatives to the 6.25-inch by 9.25-inch fanfold paper on which log data has been tradi
23、tionally printed. Exam- ple figures conforming to this document and printed at the dimensions required for 8.5-inch by ll-inch paper are pro- vided. The changes made to accommodate this flexibility in paper and printer selection will in no way alter the actual scal- ing of the log data. Log data cur
24、ves will precisely “overlay,” regardless of the choice of paper or print field dimensions. Any hardcopy presentation of log data that meets all of the information content and format specifications described in the text of this document shall be considered to be in con- formance with it. 2 References
25、 Unless otherwise specified, the most recent editions or revi- sions of the following standards, codes, and specifications shall, to the extent specified herein, form a part of this standard. API RP 13B- 1 Recommended Practice for Standard Procedure for Field Testing Water-Based Drilling Fluids RP 1
26、3B-2 Recommended Practice for Standard Procedure for Field Testing Oil-Based Drilling Fluids P 13G Recommended Practice for Standard Procedure for Laboratory Testing Drilling Fluids Interchange RP 66 Exploration and Production Data Digital 3 Standard Heading 3.1 INTRODUCTION A recommended standard h
27、eading has been developed for all downhole well log data, which provides space for infor- mation pertinent to the interpretation of these logs. This infor- mation should be recorded on field copies as well as on final prints because considerable log interpretation is made from field copies. The logg
28、ing company is normally responsible for recording complete standard-heading data. However, the logging company depends upon the operator for much of these data. Thus the operator shares the responsibility for pro- viding complete and accurate data. 3.2 GENERAL INFORMATION The recommended standard lo
29、g heading has four parts consisting of a cover panel, followed consecutively by panels for well logging operations, borehole fluid properties, and a wellbore diagram. Generally, the length of each panel is between 8 inches and 8.25 inches, and the width is between 5.5 inches and 6 inches. Acceptable
30、 alternative formats are identified for specific panels in the detailed descriptions pro- vided in the following. 1 2 API RECOMMENDED PRACTICE 31 A 3.3 COVER PANEL 3.3.1 Format Two optional formats (portrait and landscape, see Figures 1 and 2 respectively) are provided for the Cover Panel. Both form
31、ats contain space for identical information. The well operator has the responsibility to select the preferred option. Each panel includes six fields as follows: 3.3.2 Service Company companys name, company logo, and log name. The field at the top of the cover panel is for the logging 3.3.3 Well Iden
32、tification The well identification field includes the unique API well number, well name, operator, producing field, county/parish, state/province, and country. If the well is not drilled in a pro- ducing field, the term wildcat may be placed in the space for field name. 3.3.4 Location The location f
33、ield contains space for a description of the wells surface location. Data may include grid coordinates, latitude and longitude, section, township, and range or other detailed survey description. 3.3.5 Elevation The elevation fields design affords accurate vertical refer- ence for both drilling and l
34、ogging operations. The permanent depth datum and its elevation, as designated by the well oper- ator, should be recorded so that removal of the rig or other equipment will not result in loss of datum. The permanent datum should be ground level, mean sea level, or a specific point on permanent wellhe
35、ad equipment. Where possible all logs and drillers measurements should relate to the top of the rotary tables kelly drive bushing. When there is no kelly bushing, the drilling floor elevation should be used for refer- ence and the space on the heading for kelly bushing elevation should be entered wi
36、th N/A. 3.3.6 Other Services The other services field is provided for the logging engi- neer to list logging services performed in the well that are not included on this presentation. Each service should be identi- fied by a unique mnemonic, as well as a brief English description (for example, DLL =
37、 dual laterolog). 3.3.7 Intervals, Dates, and Scales The intervals, dates, and scales field is for information about the logged interval, print type, acquisition dates, depth units, depth scale ratios, and depth scaling. The log interval should identify the shallowest and the deepest logged depths p
38、resented. Acquisition dates refer to the beginning and con- clusion of the acquisition of presented data. Depth scale ratio is a unitless ratio of depth on the log to depth in the borehole. For example, a ratio of 1:240 is the same as that commonly referred to in the United States as a 5- inch scale
39、 where 5 inches of log equal 100 feet of borehole. If more than one depth scale is presented, each should be speci- fied. 3.4 WELL LOGGING OPERATIONS PANEL 3.4.1 The Well Logging Operations Panel is placed imme- diately after the Cover Panel. This panel is a table for compi- lation of certain data a
40、bout each log presented. Each column in the table relates to a single logging tool, including its auxil- iary devices. Additional panels can be added as needed (see Figure 3). Definitions and instructions for the data entries contained within this panel are provided in the following paragraphs. 3.4.
41、2 The log is an individual logging tool run in the bore- hole. Combination tool runs should be reported by individual tools. Auxiliary logs such as spontaneous pontential (SP), gamma ray, and caliper should not be included unless they are run separately. 3.4.3 The date: record the date when the logg
42、ing job begins. 3.4.4 The loggingjob refers to the group of logs run from the time the service company begins the logging operation until the time the service company is released from the wellsite. Logging jobs are numbered consecutively. In most downhole measurements obtained during drilling operat
43、ions, the logging job number will be 1. 3.4.5 The logging suite refers to the group of logs run in the same borehole environment during a single logging job. The borehole environment is controlled by the borehole diameter and fluid composition and may change during the logging operation. Possible re
44、asons to change the logging suite number include (a) drilling ahead (after bit size change), (b) changing mud properties, and/or (c) performing clean-out trips. Suite numbers increase consecutively throughout the process of drilling and evaluating a well. The suite number should be 1 only for the rs
45、t logging suite of the first logging job. For downhole measurements obtained while drilling, the logging suite number should change each time there is a sig- nificant change in bit diameter or mud properties. The following is a logging-suite example: During the first logging job, a clean-out trip wi
46、th drill pipe was made. The logs obtained before the cleanout trip are included in Suite 1. logs run after the trip are included in suite 2. The logging job STANDARD FORM FOR HARDCOPY PRESENTATION OF DOWNHOLE WELL LOG DATA 3 performed after the final portion of hole was drilled is logging job 2. if
47、no changes in mud properties occurred during this logging job and no clean out trips were made, all logs from logging job 2 would be in suite 3. 3.4.6 A logging run: a set of measurements by an individ- ual tool, during which the formation properties are considered to be static. Runs are numbered co
48、nsecutively for each tool (but not each tool string). The following is a logging run example: A well is to be drilled with two intermediate logging jobs, the first requiring a dual induction tool, and the second requiring a dual induc- tiodporosity combination tool. The final logging job requires a
49、dual laterolog logging tool. The two intermediate logging jobs would include logging run 1 and logging run 2 for the dual induction tool even though the dual induction tool was run by itself on logging job 1 and was run as part of a combi- nation tool on logging job 2. logging job 3 would include log- ging run 1 for the dual laterolog tool because this would be the first instance where that tool was used. 3.4.7 The Number of repeats: enter the number of repeat measurement passes made within each logging run. Repeat passes are considered to be identical within the precision of the
