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鄂尔多斯盆地上古生界天然气成藏
引用本文:李振宏,席胜利,刘新社.鄂尔多斯盆地上古生界天然气成藏[J].世界地质,2005,24(2):174-181.
作者姓名:李振宏  席胜利  刘新社
作者单位:长庆油田公司,勘探开发研究院,陕西,西安,710021
基金项目:国家重点基础研究发展规划973项目资助(2001CB209104-5)
摘    要:鄂尔多斯盆地上古生界烃源岩具有广覆式生烃特征;储集层在宏观上受沉积相带的控制,微观上受同沉积火山物质的影响;油气成藏经历了从异常高压向异常低压的演化,异常高压控制着油气的初次运移方向。根据包裹体均一温度及成份分析,油气成藏过程主要经历了常温常压、异常高温高压、次异常高温次高压和常温低压4个阶段。在此基础上,根据岩性圈闭与烃源岩的关系,将上古生界的成藏组合划分为源储互层式、近源式和远源式3种组合类型。

关 键 词:鄂尔多斯盆地  上古生界  烃源岩  储集层  异常压力  成藏组合
文章编号:1004-5589(2005)02-0174-08

Formed pool of natural gas in Upper Paleozoic of Ordos Basin
LI Zhen-hong,XI Sheng-li,LIU Xin-she.Formed pool of natural gas in Upper Paleozoic of Ordos Basin[J].World Geology,2005,24(2):174-181.
Authors:LI Zhen-hong  XI Sheng-li  LIU Xin-she
Institution:LI Zhen-hong,XI Sheng-li,LIU Xin-she Research Institute of Exploration and Development,Changqing Oifield Branch,Xi'an 710021,Shaanxi,China
Abstract:The source rocks are distributed widely in the Upper Paleozoic of Ordos Basin. Macroscopically,the reservoir rocks are controlled by sedimentary facies zones and influenced by the volcanic matter of synsedimentary microscopically. The formed pool of natural gas has the course from abnormal high pressure to abnormal low pressure. The initial movement direction of the natural gas was controlled by abnormal high pressure. According to the homogeneous temperature of inclusion and the element analysis,the course of formed natural gas pool has four phases:ordinary temperature and pressure,abnormal high temperature and high pressure,secondary abnormal high temperature and high pressure,ordinary temperature and low pressure. Thus the connection litho trap and the source rocks,the combination of the formed natural gas pools can be divided to three types:the alternating beds of source and reservoir rocks,near the source rocks and remote source rocks.
Keywords:Ordos Basin  Upper Paleozoic  source rocks  reservoir rocks  abnomal pressure  combination of formed natural gas pool
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