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ID:33812456
大小:2.16 MB
页数:8页
时间:2019-03-01
《文安-杨村斜坡石炭-二叠系煤成气成藏模式》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第44卷第12期煤炭科学技术Vol.44No.122016年12月CoalScienceandTechnologyDec.2016地质与测量文安-杨村斜坡石炭-二叠系煤成气成藏模式1223钱铮,张松航,唐书恒,李昭(1?中国石油华北油田勘探开发研究院,河北任丘062552;2?中国地质大学(北京)能源学院,北京100083;3?中国地质调查局油气资源调查中心,北京100029)摘要:基于沉积组合、构造演化和盆地模拟技术,分析了冀中坳陷文安-杨村斜坡石炭-二叠系煤成气成藏模式。结果表明:石炭-二叠系内部本溪组、太原组和山西组中煤层和暗色泥岩层构成有效烃源岩;储层分布于煤系砂岩
2、-粉砂岩中,原生孔隙不发育,储集空间以次生孔隙为主;煤层、上石盒子组上部泥岩、石千峰组及下三叠统紫红色泥岩及粉砂质泥岩组成有效盖层,与储集层匹配形成储盖组合。石炭-二叠系烃源岩一次生烃发生在三叠纪末,生烃量有限,无成藏意义;二次生烃分别发生在古近纪沙河街岩浆热液侵入期和新近纪以来的深成变质作用发生期。区内圈闭主要为形成于孔店期-沙1期的断背斜和断块圈闭,成藏要素配置良好,保存条件是成藏主控因素。关键词:冀中坳陷;成藏配置;生烃期次;成藏演化中图分类号:TE133文献标志码:A文章编号:0253-2336(2016)12-0160-07AccumulationmodeofCa
3、rboniferous-Permiancoal-formedgasinWen’an-YangcunSlope1223QianZheng,ZhangSonghang,TangShuheng,LiZhao(1?ResearchInstituteofExplorationandDevelopment,PetroChinaHuabeiOilfieldCompany,Renqiu062552;2?SchoolofEnergyResouresChinaUniversityofGeosciences(Beijing),Beijing,100083;3?OilandGasSurvey,Ch
4、inaGeologicalSurvey,Beijing100029)Abstract:Basedonthesedimentarycomposition,tectonicevolutionandbasinsimulationtechnology,theCarboniferous-Permiancoal-formedgasaccumulationmodeinWen’an-YangcunSlope,JizhongDepressionwasanalyzed?TheresultsshowthatthecoalseamsanddarkshaleoftheBenxi,Taiyuanand
5、ShanxiFormationsconstitutevalidsourcerocks?ThereservoirdistributesintheCarboniferous-Permi⁃anclasticsandandfinesandrocks,andtheprimaryporosityisnotdeveloped,thereservoirspaceisdominatedbysecondaryporosity?Coalseams,thepurplemudstoneandsiltymudstoneintheShangshiheziFormation,ShiqianfengForm
6、ationandLowerTriassicistheeffectivecaprock?Sotherearevalidsource-reservoir-capasemblages?ThefirsthydrocarbongenerationoftheCarboniferous-PermiansourcerockswasinthelateTriassic,andalimitedamountofhydrocarbonwasgenerated,noaccumulationsignificance?Thesecondaryhydrocarbongen⁃erationoccurredin
7、ShahejieAge,PaleogenewhenmagmaintrusionoccurredandNeogenetonowwhenplutonicmetamorphismoccurred,strespectively?Thestructuraltrapsintheareaaremainlyblockfaultedtrapsandanticlinetraps,whichmainlyformedinKongdianAgeto1memberofShahejieAge?TheOil-gasreservoir-formin
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