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《过套管电阻率测井资料预处理方法研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、科技导报2012。30(03)研究论文(Articles)研.过套管电阻率测井资料预处理方法研究谢关宝。李三国,李永杰中国石化石油工程技术研究院,北京100101摘要近几年。随着电子技术的发展和油田中后期寻找剩余油分布的需要,过套管电阻率测井作为一种新技术迅速发展起来。该技术在套后剩余油监测、老井挖潜、油层水淹规律确定、油层生产动态监测等方面具有独特的优势,并取得了较好的应用效果。但在采集过程中其有效信号为纳伏级。套管、测量频率、测量电极距、水泥环、套管非均质性等都会使测量信号发生严重的畸变,在过套管电阻率资料预处理中
2、必须对这些因素进行校正。本文针对俄罗斯EC0S一31—7过套管测并资料特点。分析了原始离散数据筛选方法、离散数据插值原则.探讨了套管非均质性、水泥环及固井质量校正方法。对实际过套管测井原始资料的处理效果表明,该处理方法有效可行。关■词过套管电阻率测井;资料预处理;非均质校正;水泥环校正中圈分类号P631.811文献标识码Adoi10.3981~.issn.1000—7857.2012.03.009DataPre—pr0cessingMethodforCasedHoleFormationResistivityLoggin
3、gXIEGuanbao,LISanguo,LIYongjieSinopecResearchInstituteofPetroleumEngineering,Beo'ing100101,ChinaAbstmotWiththerecentlydevelopmentofelectronictechnology,thecasedholeformationresistivitylogginghasbeenrapidlydevelopedinordertodiscoverthedistributionofresidualoilint
4、hemiddleorlateexploitationstageoftheoilfields.Theloggingtechnologyhasmanyadvantagesthatincludethemonitorofresidualoilthroughcasing,tappingpotentialofoldwell,thedeterminationofsubmergedoillayer,andtheproductiondynamicmonitoring.Theyhaveallreceivedquitegoodapplica
5、tioneffects.However,theeffectivesignalduringtheacquisitionprocessisinthelevelofnano—volt,thecasing,measuring~equency,measuredfromtheelectrodes,cementmantle,andtheheterogeneityofcasedhole1willmakemeasuredsignal’distort,thecasedholeresistivitydatainthepre—processi
6、ngmustbecorrectedforthesefactors.BasedonthelogginginformationcharacteristicsoftheRussianECOS一31~7,thefilteringandinterpolatingmethodsfortheoriginaldiscretedatahavebeenanalyzed.Furthermore,thecorrectionmethods,suchastheheterogeneityofcasing,cementmantle,andcement
7、quality,havebeendiscussed.TheprocessingresultsoftheoriginaldatabymeansofactualcasingtsintheoilfieldindicatethatthemethodiSfeasibleandeffectiveKoywordscasedholeformationresistivitylogging;datapre-processing;heterogeneitycorrection;cementmantlecorrection0引言国石油天然气集
8、团公司)等l】-3J。过套管电阻率测井是在钢套管内测量地层电阻率从而过套管电阻率测井采用逐点多次测量方式采集数据.采对含水饱和度进行评价和对油藏进行监测的一种新的测井集信号弱,同时受套管、测量频率、测量电极距、水泥环、套管方法。由于其在剩余油监测、老井挖潜、油层水淹规律确定、非均质性等多种因素影响,在过套管电阻率资料预处理中油层生
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