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时间:2020-01-14
《川中地区磨溪气田嘉二段砂屑云岩储集层成因.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、石油勘探与开发2682011年6月PETROLEUMEXPLORATIONANDDEVELOPMENTV_01I38No.3文章编号:1000—0747(2011)03—0268-07川中地区磨溪气田嘉二段砂屑云岩储集层成因谭秀成1,2,罗冰2,李卓沛2丁熊2,聂勇2,吴兴波2,邹娟3,唐青松4f1.油气藏地质及开发工程国家重点实验室;2.西南石油大学资源与环境学院;3.中国石油西南油气田公司川西北气矿;4.中国石油西南油气田公司川中油气矿)基金项目:四川省重点学科建设项目(SZD0414)摘要:对四川盆地磨溪气田嘉陵江组嘉二段二亚段c层(Tj2)砂屑云岩
2、宏观与微观特征进行深入分析,建立滩相碳酸盐岩优质储集层的成因模式。原生粒间孔是滩相碳酸盐岩储集层的主要储集空间,其主要特征及判识标志包括:储集层发育严格受沉积微相控制、孔隙以残余粒间孔和溶扩残余粒间孔为主、颗粒接触处仅有海底胶结物发育、初期压实使颗粒呈线.凹凸接触的格架支撑及部分孤立粒间孔隙的埋藏胶结物不具溶蚀现象等。原生粒间孔的保存机制为:在海底胶结后,初期压实使具早期环边胶结物的颗粒呈格架支撑、喉道减小;压实流体胶结使滩体周缘致密化,并且粒间孔内有限的浅埋藏胶结物使喉道堵塞,成岩流体达到溶蚀.胶结平衡后胶结作用终止;后期埋藏溶蚀主要调整、优化改造先期孔
3、隙层,其对单个储渗体储集空间的绝对增加值仅占次要地位,并不改变这类储集层的储渗体时空分布图6参32关键词:滩相碳酸盐岩;砂屑云岩;储集空间;原生粒间孔;成因机制;嘉陵江组;磨溪气田中图分类号:TEl21.1文献标识码:AJia-2MemberdoloarenitereservoirintheMoxigasfield,middleSichuanBasinTanXiucheng,LuoBing,LiZhuopei,DingXiong,NieYong,WuXingbo,ZouJuan,TangQingsong(1.StateKeyLaboratoryofOila
4、ndGasReservoirGeologyandExploitation,SouthwestPetroleumUniversity,Chengdu610500,China;2.CollegeofResourceandEnvironment,SouthwestPetroleumUniversity,Chengdu610500,China;3.NorthwestSichuanMiningDistrict,PetroChinaSouthwestOilandGasFieldCompany,fliangyou621700,China;4.CentralSichuan
5、MiningDistrict,PetroChinaSouthwestOilandGasFieldCompany,Suining629000,China)Abstract:BasedonanalysisonthemacroscopicandmicrocosmicfeaturesofdoloareniteinClayer,sub.member2.Jia一2MemberoftheJialingjiangFormationintheMoxigasfield,thegeneticmechanismoffavoritereservoirsinbeachfaciesca
6、rbonaterockisestablished.Primaryinter-granularporesarethemainreservoirspacesinthebeachfaciescarbonates,whichhavethefollowingkeycharacteristicsandidentificationsigns:thereservoirdevelopmentwasstrictlycontrolledbythedepositionalmicrofacies;themainporetypesareresidualinter-granularpo
7、resanddissolved—enlargedresidualinter-granularpores;onlysubmarinecementexistedinthegraincontact;initialcompactionledtograinsunderframeworksupportinline-·concave·convexcontactandtheburialcementinsomeseparateinter-granularporesbeingnotdissolved.Theconservationmechanismofprimaryinter
8、-granularporesisdescribedasfollow
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