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时间:2019-05-31
《基于动电效应的岩芯渗透率实验测量》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据第53卷第8期地球物理学报V01.53。No.82010年8月CHINESEJOURNAl.OFGEOPHYSICSAug.,2010王军,胡恒山。徐小蓉等.基于动电效应的岩芯渗透率实验测量.地球物理学报,2010,53(8):1953~1960。DOI:10.3969/j.issn.0001—5733.2010.08.02lWangJ,HuHS,XuXR,eta1.Experimentalmeasurementstudyonrockpermeabilitybasedontheelectrokineticeffect.ChineseJ.Geophys.(inC
2、hinese),2010,53(8):1953~1960,DOI:10.3969/j.issn.0001—5733.2010.08.021基于动电效应的岩芯渗透率实验测量王军1,胡恒山H,徐小蓉2,李新2,程希2,孙宝佃21哈尔滨工业大学航天学院。哈尔滨1500012中国石油集团测井有限公司,西安710021摘要根据孑L隙介质的动电耦合理论设计了一套岩芯渗透率测量系统.实验采用交流锁相放大技术,在低频12~42Hz范围内完成r砂岩岩样流动电势和电渗实验,得到r流动电势系数K。和电渗压力系数Kr,进『f
3、i计算出岩样动电渗透率,对于中、高渗透牢岩样。测量得出的动电渗透率
4、与常规气测渗透率差异较小,两者具有很好的相关性.实验表明,动电测量可作为岩样渗透率测量的一种方法,同时揭示了利用地层动电测井信号反演地层参数的可能性,实验结果对于分析天然地震动电效应也有参考意义.关键词动电耦合效应,渗透率,锁相技术,流动电势,电渗压力130I:10.3969/j.issn.0001—5733.2010.08.021中图分类号P631收稿日期2010-01—06,2010-06-09收修定稿ExperimentalmeasurementstudyonrockpermeabilitybasedontheelectrokineticeffectWANGJu
5、nl,HUHeng—Shan¨,XUXiao—Ron92,LIXin2,CHENGXi2,SUNBao—Dian21DepartmentofAstronauticsandMechanics,HarbinInstituteofTechnology。Harbin15000l。China2ChinaPetroleumLoggingCo.Ltd.,Xi'An710021,ChinaAbstractAnexperimentaltestsystemisdevisedtomeasuretherockpermeabilityonthebasisofrockelectrokinetic
6、effects.ByemployingtheAClock—intechnique,thestreamingpotentialandelectroosmosispressureexperimentsareconductedatthelowfrequencyrangebetween12Hzand42Hz.ThestreamingpotentialcoefficientKsandelectroosmoticpressurecoefficientK£areobtained.Therockpermeabilityisthencalculatedfromthesecoeffici
7、entsandthemeasuredconductivityoftherockbasedontheelectrokinetictheory.Forthemiddleandhighpermeabilitysamples,therearelittledifferencesbetweentheeleetrokineticpermeabilityandgaspermeability,andthereisagoodcorrelationbetweenthem.Thisexperimentalstudynotonlyshowsthatrockpermeabilitycanbeme
8、asuredwiththeelectrokinetictechnique,butalsorevealsthepossibilitytoinversetheformationparametersfromelectrokineticwellloggingsignals.Theelectrokineticexperimentsarealsousefulfortheunderstandingofearthquake—excitedelectricfield.KeywordsElectrokineticeffects,Permeability,Lock—int
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