天然气地球科学 ›› 2005, Vol. 16 ›› Issue (6): 719–725.doi: 10.11764/j.issn.1672-1926.2005.06.719

• 天然气地质学 • 上一篇    下一篇

渝东碳酸盐岩区油气运聚体系

陈瑞银; 徐思煌; 梅廉夫;   

  1. 1.中国科学院油气资源研究重点实验室,北京 100029;2.中国地质大学资源学院,湖北 武汉 430074
  • 收稿日期:2005-08-11 修回日期:2005-09-28 出版日期:2005-12-20 发布日期:2005-12-20
  • 通讯作者: 陈瑞银sdcrychen@sohu.com. E-mail:sdcrychen@sohu.com.
  • 作者简介:陈瑞银(1976-),男,山东泰安人,博士研究生,主要从事石油地质与成藏动力学研究

HYDROCARBON MIGRATION AND ACCUMULATION SYSTEM INCARBONATE FORMATION, EASTERN CHONGQING

CHEN Rui-yin, XU Si-huang,MEI Lian-fu   

  1. 1.Key Laboratory of Petroleum Resources, Institute of Geology and Geophysics, CAS, Beijing 100029, China;
    2.China University of Geosciences, Wuhan 430074, China
  • Received:2005-08-11 Revised:2005-09-28 Online:2005-12-20 Published:2005-12-20

摘要:

因受多期构造变动、碳酸盐岩及超压发育等因素影响,渝东地区油气运聚体系有其特殊性。通过对古岩溶发育、成岩作用及断裂的分析,认为油气运移的通道除高孔渗岩层、不整合面、断裂系统外,岩溶系统也可为有利运移通道;浮力与超压释放产生的水动力是油气二次运移的驱动力。运用单井埋藏史、包裹体测温等手段分析了运聚期次和构造期的关系以及各运移期流体势的变化后认为,志留系、二叠系油气在T3末和J2s晚期发生2期大规模运移,志留系油气在燕山晚期张性作用阶段的K1晚期再次在石炭系充注,总体运移指向石柱及其它继承性隆起区;二叠系油气为自生自储型,三叠系油气藏由于燕山晚期以来的张性断裂开启而发生强烈的改造和逸散。

关键词: 渝东地区, 碳酸盐岩, 油气运聚, 运移通道, 异常压力, 流体势

Abstract:

The characteristics of hydrocarbon migration and accumulation system in carbonate formation, eastern Chongqing can be traced from these factors: disturbance ofmulti-tectonics, lithologic character of carbonate formation and existence of abnormal pressure. Besides of permeable formations, plane of unconformity andframework of faults, karst cave is another important type of migration pathway according to the analysis of paleo-karst cave, diagenesis and fault. Buoyancy andhydropower from release of overpressure drive the fluids to migrate in formation. The relationships between hydrocarbon migration stages and tectonic movementsbased on the data of burial history of well and fluid inclusions and the changes of fluid potential in all migration periods indicate that: Under the force of  buoyancy and hydropower, hydrocarbon in Silurian and Permian migrated extensively in late Triassic and middle Jurassic. Silurian hydrocarbon was injected intoCarboniferous again when late Yanshan extension movement took place in the end of late Cretaceous. And its accumulation place is Shizhu and other doming zones.Hydrocarbon sourced from Permian formed reservoir in itself. But hydrocarbon reservoir from Triassic destroyed due to the opened framework of faults.

Key words: Eastern chongqing, Carbonate formation, Hydrocarbon migration and accumulation system, Migration pathway, Abnormal pressure, Fluid potential.

中图分类号: 

  • TE122.1+2

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