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时间:2020-05-20
《铜川地区油页岩地层电性断面特征及勘查-论文.pdf》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、西南石油大学学报(自然科学版)2014年6月第36卷第3期JournalofSouthwestPetroleumUniversity(Science&TechnologyEdition)钳撑出熙缸V_o1.36No.3Jun.2014DO1:10.11885~.issn.1674—5086.2012.10.11.04文章编号:1674.5086(2014)03—0059.09中图分类号:P319文献标志码:A铜川地区油页岩地层电性断面特征及勘查沫王凯,张旭,唐圣松,姜亭西安地质矿产研究所,陕西西安710054摘要:为了研究电阻率测深方法
2、在油页岩地区的适用性及分辨率,在鄂尔多斯盆地南缘铜川地区开展了电阻率测深工作。结合钻孔录井和见矿情况,分析了油页岩地段两种勘查方法获得的电阻率断面特征,在电性断面上固定了油页岩层的特定部位。油页岩层厚度相对埋深而言属薄层、高阻目标体,其厚度与埋深纵向比小,在获得的电阻率测深断面上,高阻电性的油页岩层在电阻率测深断面上分辨率不清晰,其层位与电阻率等值线梯度变化带对应较好,从而间接指示了油页岩层位置。同时,通过岩性与测井参数综合分析,认为测深断面上这种电阻率值随深度的渐变特征,从电性角度描述了油页岩层由浅湖沉积环境到半深湖环境的变迁过程,提
3、出电阻率测深方法可以达到勘查油页岩层之目的。关键词:电阻率测深;电阻率梯度带;油页岩;浅湖相沉积;鄂尔多斯盆地ResistivitySectionCharacteristicsandExplorationoftheOilShaleLayerinTongchuanAreaWangKai,ZhangXu,TangShengsong,JiangTingXianInstituteofGeologyandMineralResources.Xian.Shaanxi7J0054.ChinaAbstract:Inordertostudythesuita
4、bilityandresolutionofresistivitysoundingmethodinoilshaleregion,wecarriedouttheresistivitysoundinginTongchuanArea,thesouthofOrdosBasin.Combinedwithdrillingmudlogginganddiscoveryoresituation,analysisoftheoilshalesectionresistivityfeaturesbytwomethodsismade。andthespecificar
5、easofoilshalelayerintheelectricalsectionareselected.Oilshalelayerthicknessisthinandhighresistancelayerintargetbody,comparedtoburydepth.Intheobtainedelectricalsection,theresolutionofhighresistanceelectricaloilshalelayerisnotveryclear,butresistivityisolinechangeofgradientz
6、onecorrespondswelltooilshalelayerposition,indicatingtheoilshalelayerpositionindirectly.Andthroughthecomprehensiveanalysisoflithologyandloggingparameters,wethinkthegradientchangesofresistivityvalueswithdepthchangesresistivityvaluewithdepthdescribesfromelectricalaspectthee
7、volutionofoilshalelayerfromshallowlakesedimentaryenvironmenttohalfdeeplacustrineenvironment.Thereforeweconcludethatresistivitysoundingmethodcanachievethepurposeoftheexplorationofoilshalelayer.Keywords:resistivitysoundingmethod;gradientzoneofresistivityisolinechange;oilsh
8、ale;shallowlakesedimentary;OrdosBasin网络出版地址:http://www.cnkimet/kcms/doi/1011885/j.issn1674-5086.2012101
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