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大小:1.71 MB
页数:9页
时间:2020-03-26
《鄂尔多斯盆地陕北地区长101高渗储层的控制因素.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、第32卷第5期地质通报Vo1.32.No.52013年5月GEoLoGICALBULLETINOFCHINAMav.2013鄂尔多斯盆地陕北地区长101高渗储层的控制因素朱静,一,牛小兵。,张振红。,淡卫东。,汪伶俐ZHUJing。,NIUXiao—bing3,ZHANGZhen—hong。,DANWei—dong。,WANGLing—li,1.西北大学地质学系.陕西西安710069:2.低渗透油气田勘探开发国家工程实验室.陕西西安710018:3.长庆油田分公司勘探开发研究院.陕西西安7100211.DepartmentofGeolo
2、gy,NonhwestUniversity,Xi"an710069,Shaanxi,Chino;2.NationalEngineeringLaboratoryofExplorationandDevelopmentofLow-permeabilityOil—Gaszd.Xi"an710018,Shaanxi,China;3.ResearchInstituteofExplorationandDevelopment,ChangqingOilfieldCompany,Xi"an710021,Shaanxi,China摘要:鄂尔多斯盆地中部的陕北
3、地区,是盆地中生界油藏最为丰富的区带之一,主要含油层系为三叠系延长组长6层,其次是侏罗系延安组,以往的研究也多集中于以上含油层。长10层是近几年勘探评价的新层系,利用现代测试技术和数理统计研究了长10层的沉积、成岩特征,分析高渗储层控制因素。结果表明,沉积环境控制长10,高渗储层分布,成岩作用对长10高渗储层的形成起主导作用。主河道砂岩厚度大、粒度粗、孔喉大、孔隙连通性好,河道侧翼砂岩厚度薄、粒度细、孔喉小、孔隙连通性差。因此,压实作用后主河道砂岩粒间孔含量多于河道侧翼砂岩,导致主河道砂岩胶结作用弱于河道侧翼砂岩,而溶蚀作用强于河道侧翼
4、砂岩,主河道砂岩物性明显好于河道侧翼。沉积、成岩作用共同造成长10高渗储层发育于河道主带和分流交汇部位。关键词:鄂尔多斯盆地;长1O层;高渗储层;成岩作用;定量表征中图分类号:TEl22.2+21文献标志码:A文章编号:1671—2552(2013)05—0815—09ZhuJ,NiuXb,ZhangZH,DanWD,WangLL.Controlfactorsforthehigh-permeabilityreservoirsofChanglO1ReservoirGroupofYanchangFormationinnorthernShaa
5、nxiProvince,Ordosbasin.GeologicalBulletinofChina,2013,32(5):815-823Abstract:NorthernShaanxiareaincentralOrdosbasinisoneof出erichestMesozoichydrocarbonaccumulationzones.wherethepreviousstudiesofMesozoicoil—bearingseriesfocusedonChang6andJurassicYananFormation.TheChang10,re
6、servoirgroupisanewlayerexploredandevaluatedinthepastfewyears.Inthispaper,sedimentarycharacteristicsanddiagenesisofChang101reservoirgroupwerestudiedandcontrolfactorsforthehigh——permeabilityreservoirswereanalyzedbyusingvariousmodernanalytictechniquesandmathematicalstatisti
7、cs.Theresearchresultsindicatethatthedistributionofthehigh—permeabilityreservoirswascontrolledbythesedimentaryenvironment,andtheformationofhigh—permeabilityreservoirswasmainlyafectedbydiagenesis.Thesandbodyofthemainchannelischaracterizedbygreatthickness,coarsegrainsize,la
8、rgeporethroatandgoodconnectivitybetweenthepores,whereasthedistributarychannelhasthinthickness,finegrain
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