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时间:2020-04-12
《《车排子周缘白垩系清水河组砂体油气输导特征》.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51卷第3期兰州大学学报(自然科学版)、b1.51No.32015年6月JournalofLanzhouUniversity(NaturalSciences)Jun.2015文章编号:0455—2059(2015)03—0327—07车排子周缘白垩系清水河组砂体油气输导特征周长啸,刘洛夫,吴康军,肖飞,徐正建中国石油大学(北京)油气资源与探测国家重点实验室,盆地与油藏研究中心,北京102249摘要:综合测井,录井、物性分析、地层水和地球化学等资料,在现代油气运移理论的基础上,从宏观与微观、平面与剖面等方面,研究了准噶尔盆地车排子周缘白垩系清水河组砂体的油气输导特征.清水河
2、组发育扇三角洲分流河道砂体,顺物源的北西一南东方向连通性好,垂直物源方向的砂体受河道间泥岩的阻隔,连通性较差,底部发育一套连续稳定的砂砾岩是油气的优势运移通道.清水河组砂体主要为方解石胶结,处于中成岩阶段,发育较多溶孔,孔隙度均值为17.6%,为高孔中喉特征,微观连通性好.清水河组砂体地层水水型相同,均为NaHCOa型,证实砂体的连通性好.来自沙湾凹陷深部的二叠系油气经断裂和不整合面运移至白垩系后,沿清水河组砂体从凹陷向凸起、由东南向西北部运移.综合多种因素分析,建立了清水河组砂体的油气输导模式.关键词:地球化学;砂体;油气输导;清水河组;车排子凸起中图分类号:TEl22.
3、1文献标识码:AD0I:10.13885/j.issn.0455—2059.2015.03.004HydrocarbonmigrationinsandlayersoftheCretaceousQingshuiheFormationinChepaizianditssurroundingareasZhouChang—xiao,LiuLuo-fu,WuKang-jun,XiaoFei,XuZheng-jianStateKeyLaboratoryofPetroleumResourcesandProspecting,BasinandReservoirResearchCenter,Ch
4、inaUniversityofPetroleum(Bering),Beijing102249,ChinaAbstract:Onthebasisofthemoderntheoryonoilandgasmigration,thecharacteristicsofhsdrocarbonmigrationofQingshuiheFormationinChepaiziupliftanditssurroundingareaswerestudiedfromthemacroscopicandmicroscopicplaneandprofile,combinedwiththeloggingd
5、ata,petrophysicalanalysisdata,formationwaterdataandgeochemical,etc.DistributarychannelsandbodiesoffandeltadevelopedinQingshuiheFormation,whichhavegoodcontinuityinthenorthwesttosoutheastdirectionalongthesedimentstransportation.Thechannelsareseparatedbytheinter—channelmud—stones,sothattheyar
6、elesscontinuousintheperpendiculardirectiontotheprovenance.AsetofcontinuousandstableglutenitesatthebottomofQingshuiheFormationisanadvantageousoilandgasmigrationpath.Sandbodiesaremainlyofcalcitecementationandareinthemiddlediageneticstage,sotheyhavedevelopedmanysolutionpores.andtheaverageporo
7、sityis17.6%.Theypossessthecharacteristicsofhighporosity—mediumthroatandgoodmicroconnectivity.SandbodiesintheQingshuiheFormationhavethesametypeofformationwater,NaHCO3type,indicatingtheirgoodcontinuity.ThepermianhydrocarboninShawansagmigratedupwardsalongfaultsan
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