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1、第27卷 第5期 大庆石油地质与开发 P1G1O1D1D12008年10月·135·文章编号:100023754(2008)0520135204油层注聚后测井曲线异常及水淹层解释校正1,222方 亮,王 华,任海滨(11中国科学院广州地球化学研究所,广东广州 510640;21大庆油田有限责任公司第六采油厂,黑龙江大庆 163114)摘要:针对注聚区块新钻井水淹层解释异常的问题,通过注聚前后的测井曲线资料对比和取心井资料分析,研究了注聚后储层特征和测井响应的变化规律,发现深三侧向等电阻率曲线值没有因水淹影响而降低,反而升
2、高;自然电位曲线幅度值减小。测井曲线异常变化对测井解释的影响主要表现为水淹程度偏低,综合注聚前后储层特征变化和聚驱油层岩石电性特征研究,归结出聚合物在孔隙中的滞留是引起测井响应变化的主要原因。研究建立了测井响应异常的判别公式、测井响应复原图版和水淹层解释校正方法,使注聚后水淹层解释精度达到了85%,较原方法提高了20个百分点。研究成果在喇嘛甸油田得到推广应用,为聚驱效果评价、聚驱后剩余油研究与挖潜提供了可靠依据。关键词:水淹层解释;聚合物驱;测井响应异常;聚驱后剩余油+中图分类号:P631181 文献标识码:AWelll
3、oggingcurveanomalyandwatered2outoillayerinterpretationcorrectingmethodafterpolymerflooding1,222FANGLiang,WANGHua,RENHai2bin(11GuangzhouGeochemicalResearchInstituteofChineseAcademyofSciences,Guangzhou510640,China;21No16OilProductionPlantofDaqingOilfieldCompanyLtd1,D
4、aqing163114,China)Abstract:Inviewsoftheproblemofwatered2outlayerinterpretationanomalyfornewly2drilledwellintheblockofpoly2merflooding,throughcomparingofwellloggingdatabetweenbeforeandafterpolymerfloodingandeventheanalysisofcoredwelldata,thepaperstudiesthechangingla
5、wsofreservoircharacteristicsandwellloggingresponseafterpolymerflooding,andthendiscoversthatthevalueofresistancecurveofdeepthree2lateralloggingisnotreducedbywaterflood2ingbutincreasedonthecontrary;amplitudevaluesofspontaneouspotentiallogslowerdownabit1Theinfluenceof
6、welllogginganomalyonlogginginterpretationdisplaysasfollows:thedegreeofwaterfloodingisratherlower1Byintegratingwithreservoircharacteristicschangesbeforeandafterpolymerfloodingandthestudiesofrockelectricityfeaturesofpoly2merfloodedoillayer,theprincipalreasoncausingwe
7、llloggingresponsechangeistheremainedpolymerinpores1Throughtheabovestudies,theidentifyingformulaofloggingresponseanomaly,resettingmapplateofwelllog2gingresponseandwatered2outlayerinterpretationcorrectingmethodhavebeenestablished,sotheinterpretationaccura2cyafterpoly
8、merfloodinghasreached85%,increasing20%thanbefore1TheresearchresultshavebeenpopularizedinLamadianOilfieldandfurthermorehaveprovidedreliableevidenc
