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时间:2019-05-24
《钻井液密度及电阻率对测井解释精度的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、2015年8月大庆石油地质与开发Aug.,2015第34卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingVo1.34No.4DOI:10.3969/J.ISSN.1000.3754.2015.04.029钻井液密度及电阻率对测井解释精度的影响杨宝侠(大庆油田有限责任公司采油工程研究院,黑龙江大庆163453)摘要:为研究钻井液密度及电阻率对测井曲线读值的影响,开展了钻井过程中钻井液侵入模拟实验和钻井液滤液电阻率与侵入带电阻率之间变化关系实验。结果表明:同一渗透率岩心侵入深度随压力增加而不断增大,但当渗透率达到某一数值时各级
2、别岩心的钻井液侵入深度则近似相等;在泥饼未形成时钻井液侵入深度急剧增加,后随时间推移泥饼变厚,钻井液侵入深度增加速率变慢,最后趋于停止;侵入带电阻率随钻井液电阻率增大而增大。建立了侵入深度与岩石渗透率、压力、侵入时间等的函数关系以及侵入带电阻率与钻井液滤液电阻率的关系式。校正方法使储层厚度解释精度提高7.3%,为射孔方案编制提供了可靠依据。关键词:钻井液密度;电阻率;侵入深度;储层厚度;测井解释中图分类号:TE348文献标识码:A文章编号:1000—3754(2015)04-0148—04INFLUENCESoFTHEDRILLING.FLUIDDENSITYANDRESI
3、SITIVITYONTHELOGINTERPRETATIoNPRECISIONYANGBaoxia(OilProductionEngineeringResearchInstituteofDaqingOilfieldCo.Ltd.,Daqing163453,China)Abstract:Inordertostudytheinfluencesofthefluiddensityandresistivityonthereadingsofthewelllogging,theexperimentsofthedrillingmudinvasionandchangedrelationshi
4、pbetweenthedrillingmudfiltrateandinvadedbeltresl’stl‘vl—tlesinthecourseofthedrillingareengaged.Theresultsshowthatforthesamepermeabilitycores1withtheriseofthepressure,thepenetrationdepthalsoincreases,butwhenthepermeabilityreachingacertainvalue,thedrillingfluidpenetrateddepthsofallgradesofth
5、ecoresarealmostthesame;whenthemudcakesarenotformed,theinvadeddepthsarerapidlyincreased,afterthat,thecakesbecomethickwiththetime,theincrementalratesofthepenetrateddepthislower,andmoreovercometotheendfinally;withtheriseofthedrillingfluidresistivity,theinvadedbeltresistivityisalsoenhanced,thu
6、sthefunctionalrelationsbetweenthepenetrationdepth,rockpermeabili-ty-pressureandinvasivetimehavebeenestablished;SOhasbeentherelationalexpressionbetweentheinvadedzoneresistivityandthefiltrateresistivity.Bythecorrectingmethod,theinterpretedprecisionofthereservoirthicknessisupto7.3%,thesoundev
7、idencehasbeenprovidedforthecompilationoftheperforatingprogram.Keywords:drilling—fluid/muddensity;resistivity;invasion/penetrationdepth;reservoirthickness;loginterpre-tatjon收稿日期:2015.03—22改回日期:2015-04-24基金项目:国家重大科技专项“大型油气田及煤气层开发”(2011ZX05021-006)。作者简介:杨宝侠,女,197
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