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四川盆地元坝-通南巴地区关键构造构造特征及陆相致密砂岩天然气成藏响应
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  • 英文篇名:Critical Tectonic Periods and the Response of Gas Accumulation in Non-Marine Tight Sandstone Reservoir in Yuanba-Tongnanba Area,Sichuan Basin
  • 作者:刘昭茜 ; 罗开平 ; 唐永 ; 杨帆 ; 梅廉夫 ; 沈传波
  • 英文作者:Liu Zhaoqian;Luo Kaiping;Tang Yong;Yang Fan;Mei Lianfu;Shen Chuanbo;Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences;Wuxi Research Institute of Petroleum Geology,SINOPEC Petroleum Exploration and Production Research Institute;School of Geosciences,Yangtze University;
  • 关键词:元坝-通南巴地区 ; 关键构造 ; 致密砂岩天然气 ; 构造-成藏响应 ; 石油地质
  • 英文关键词:Yuanba-Tongnanba area;;critical tectonic period;;tight sandstone gas;;hydrocarbon accumulation response to tectonism;;petroleum geology
  • 中文刊名:DQKX
  • 英文刊名:Earth Science
  • 机构:中国地质大学构造与油气教育部重点实验室;中国石化石油勘探开发研究院无锡石油地质研究所;长江大学地球科学学院;
  • 出版日期:2019-03-26 08:41
  • 出版单位:地球科学
  • 年:2019
  • 期:v.44
  • 基金:国家自然科学基金项目(No.41302112);; 国家科技重大专项(No.2016ZX05002-006);; 中央高校基本科研业务费专项资金资助项目(No.CUG160228)
  • 语种:中文;
  • 页:DQKX201903006
  • 页数:17
  • CN:03
  • ISSN:42-1874/P
  • 分类号:78-94
摘要
中国多旋回叠合盆地陆相致密碎屑岩层系油气资源丰富,多期、多属性构造作用使其具有复杂而特殊的油气地质特征,四川盆地元坝-通南巴地区位于多旋回、多属性构造作用交接部位,是揭示叠合盆地内多期复杂构造作用与陆相致密碎屑岩油气成藏作用关系和油气富集规律的典型地区.基于地震资料、磷灰石裂变径迹年代学和成藏特征对比,厘定元坝-通南巴地区陆相层系存在燕山晚期(晚白垩世100~70Ma)和喜山早期(始新世-渐新世40~25Ma)两个关键构造期.陆相致密砂岩天然气富集主要受这两次关键构造作用的控制,燕山晚期形成NE向主体构造,是NE向弱变形区、NW-SN向过渡变形带(通南巴西部)和NW向密集变形带的关键成藏期,构造-成藏响应模式为早期成藏、陆源充注、背斜控藏、褶皱控缝.喜山早期形成NW向构造和局限在早期NE向构造之间的近SN向构造,是SN向过渡变形带和NW-SN向过渡变形带(元坝东部)的关键成藏期,也是NW-SN向过渡变形带(通南巴西部)和NW向密集变形带的关键改造期,构造-成藏响应模式为晚期成藏、海相混源、断裂控藏、断裂控缝.
        Most of the non-marine tight sandstone strata in the polycyclic superimposed basins in China is rich in hydrocarbon resources and exhibits complicated and specific hydrocarbon geological characteristics.Yuanba-Tongnanba area is located in a polycyclic and multi-attribute tectonic intersection.It is a typical region which could reveal the respond relationship between multiphase tectonization and non-marine tight gas accumulation in the polycyclic superimposed basin.Based on the seismic data,apatite fission track(AFT)geochronology and hydrocarbon accumulation characterizes analysis,two critical tectonic periods have been identified which are the Late Yanshan epoch(Late Cretaceous about 100-70 Ma)and the Early Himalayan epoch(Eocene to Olgocene about 40-25 Ma).The gas accumulation in the non-marine tight sandstone reservoirs was controlled by the tectonization of two critical tectonic periods.NE-trending structures were built in the Late Yanshan epoch which is the critical hydrocarbon accumulation period of NE-trending weak deformation zone,NW-SN trending transitional deformation belt(the west area of Tongnanba block)and NW-trending concentrated deformation belt.The respond pattern of Late Yanshan epoch could be expressed as earlier accumulation,terrestrial source,anticline control response on gas trap and fold control response on fractures.NW-trending and nearly SN-trending structures were built in the Early Himalayan epoch which is not only the critical hydrocarbon accumulation period of SN-trending transitional deformation belt and NW-SN trending transitional deformation belt(the east area of Yuanba block),but also the critical hydrocarbon reconstruction period of NW-SN trending transitional deformation belt(the west area of Tongnanba block)and NW-trending concentrated deformation belt.The respond pattern of Himalayan epoch could be expressed as late accumulation,marine-terrestrial mixed source,fault control response on gas trap and fault control response on fractures.
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