天然气地球科学

• 天然气地质学 • 上一篇    下一篇

乐山—龙女寺古隆起构造演化与新元古界震旦系天然气成藏

姜华,汪泽成,杜宏宇,张春明,王瑞菊,邹妞妞,王铜山,谷志东,李永新   

  1. 1.中国石油勘探开发研究院石油地质研究所,北京 100083;
    2.中海油研究总院,北京 100027;3.中国科学院油气资源研究重点实验室,甘肃 兰州 730000
  • 收稿日期:2013-03-25 修回日期:2013-05-10 出版日期:2014-02-10 发布日期:2014-02-10
  • 通讯作者: 姜华sorcerer_2004@126.com. E-mail:sorcerer_2004@126.com.
  • 作者简介:姜华(1977-),男,吉林四平人,工程师,博士,主要从事层序地层学、沉积学方面的研究. E-mail:sorcerer_2004@126.com.
  • 基金资助:

    国家科技重大专项“四川、塔里木等盆地及邻区海相碳酸盐岩大油气田形成条件”(编号:2011ZX05004);横向课题“四川盆地乐山—龙女寺古隆起构造演化及对大气区形成的控制作用研究”联合资助.

Tectonic Evolution of the Leshan-Longnvsi Paleo-uplift and Reservoir Formation of Neoproterozoic Sinian Gas

JIANG Hua,WANG Ze-cheng,DU Hong-yu,ZHANG Chun-ming,WANG Rui-ju,ZOU Niu-niu,WANG Tong-shan,GU Zhi-dong,LI Yong-xin   

  1. 1.PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;
    2.CNOOC Research Institute,Beijing 100027,China;
    3.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,
    Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2013-03-25 Revised:2013-05-10 Online:2014-02-10 Published:2014-02-10

摘要:

以乐山—龙女寺古隆起新元古界震旦系灯影组为对象,研究古隆起演化与其油气成藏过程的关系。乐山—龙女寺古隆起经历了多期构造运动:桐湾(Ⅰ幕、Ⅱ幕)运动控制着灯影组古岩溶的发育,加里东运动期形成了古隆起的雏形,其后海西、印支、燕山运动期古隆起总体继承发育,轴线不断由西北向东南迁移,并最终在喜马拉雅运动后定型,控制着油气成藏过程。通过流体包裹体和埋藏史研究,认为乐山—龙女寺古隆起经历了3个关键生排烃期:志留纪、早三叠纪和侏罗纪—白垩纪。伴随着乐山—龙女寺古隆起的构造演化过程,新元古界灯影组成藏经历了7个阶段:初次充注、生烃停滞、二次充注、古油藏形成、古油藏迁移、古油藏裂解及气藏形成。结合油藏数值模拟和油气勘探实践,建立了乐山—龙女寺古隆起震旦系灯影组的成藏模式,在高石1井所在的斜坡区,发育集群展布的气藏群,横向上总体表现为层状分布特征,是天然气勘探的重要领域。同时认为,以四川盆地为代表的中国新元古界含油气系统具有重要的油气勘探价值。

关键词: 乐山—龙女寺古隆起, 桐湾运动, 古油藏, 原油裂解气, 新元古界, 震旦系

Abstract:

Taking Dengying Formation of Neoproterozoic Sinian of Leshan-Longnvsi paleo-uplift as a target,relationship between the evolution of paleo-uplift and hydrocarbon accumulation has been studied.It has undergone several periods of tectonic movements during the Leshan-Longnvsi paleo-uplift:Tongwan movement,including episode I and episode Ⅱ,controlling the development of paleo-karsting;Caledonian movement,controlling the formation of embryonic paleo-uplift;Hercynian movement,Indo-China movement and Yanshanian movement,controlling the oil and gas reservoir process.During these periods,paleo-uplift generally inherently developed,while paleo-uplift axis continuously migrated from northwest to southeastward and finally set in Himalayan.Based on the researches on fluid inclusions and burial history,it was recognized that there were three key generation or expulsion periods,i.e.,Silurian,early Triassic and Jurassic-Cretaceous sedimentary stages,respectively.There were seven periods during the Sinian Dengying Formation: initial charge,hydrocarbon stagnation,secondary charge,formation,migration and cracking of paleo-oil reservoir,and formation of gas reservoir.Combined numerical simulation with oil and gas exploration,gas reservoir modeling of Dengying Formation in Sinian was established.Gas reservoir group were distributed as a cluster block in the slope of paleo-uplift where Well Gaoshi1 existed.They showed as layered distribution in plane.The slope of paleo-uplift was an important gas exploration area.And it was also recognized that petroleum system of neoproterozoic in China would play a significant role for oil prospecting.

Key words: Leshan-Longnusi paleo-uplift, Tongwan movement, Paleo-oil reservoir, Cracking gas, Neoproterozoic, Sinian

中图分类号: 

  • TE121.1+1

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