_RP_31A-1997_2012.pdf

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 1997REAFFIRMED,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 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API Recommended Practice 31,which was orig-inally adopted in 1947,and revised in 1967.Recommended Practice 31 is being superseded by API Recommended Practice 31A.API Recommended Practice 31A provides significant enhancements to both the content and format of the standard log heading and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 designed 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 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 contained 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 recommended 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,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 are 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 Introduction.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.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 Borehole 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 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 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.Recognizing 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 easily 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 transien