天然气地球科学 ›› 2008, Vol. 19 ›› Issue (1): 70–74.doi: 10.11764/j.issn.1672-1926.2008.01.70

• 天然气地质学 • 上一篇    下一篇

致密砂岩气藏高渗透带与古构造关系探讨—以川中川南过渡带内江—大足地区上三叠统须二段致密砂岩气藏为例

罗文军1,李延钧1,李其荣2,杨坚2,袁霞1,郭瑞超1   

  1. (1.西南石油大学,四川 成都 610500;2.中国石油西南油气田分公司蜀南气矿,四川 泸州 646001)
  • 收稿日期:2007-09-22 修回日期:2007-12-29 出版日期:2008-02-10 发布日期:2008-02-10
  • 通讯作者: 罗文军lcu@163.com. E-mail:lcu@163.com.
  • 基金资助:

    中国石油西南油气田公司科研项目(编号:20050302-02-03)资助.

Relationship between High Permeability Zones and Palaeostructures in Tight Gas Reservoirs

LUO Wen-jun1,LI Yan-jun1,LI Qi-rong2,YANG Jian2,YUAN Xia1,GUO Rui-chao1   

  1. (1. Southwest Petroleum University, Chengdu 610500, China; 
    2. South Sichuan Gas Field, Southwest Oil and Gas Field Branch, CNPC, Luzhou 646001, China)
     
  • Received:2007-09-22 Revised:2007-12-29 Online:2008-02-10 Published:2008-02-10

摘要:

通过对川中川南过渡带内江—大足地区上三叠统须二段低渗透致密砂岩气藏的研究,指出:该区高产井呈带状分布并与古构造有密切的关系;沉积作用中古构造带顶部及两翼为水体的高能带,沉积了成熟度较高的粗颗粒,并且在成岩过程中由差异压实作用形成了裂缝,使古构造带顶部及两翼变为有利的油气聚集区带;远离古构造带翼部的沉积成岩条件相对较差,储层物性变差,于是在古构造带上就形成了岩性油气藏.

关键词: 致密砂岩气藏, 甜点, 古构造带, 川中—川南过渡带

Abstract:

Research of the T3x2 tight gas reservoir of Neijiang-Dazu Region in the transitional zone of Chuanzhong and Chuannan reveals that high capacity wells are in zonal distribution and are closely related to palaeostructures. In the process of deposition, because of the water bodies with high-energy on both sides of the palaeotectonic belt, the higher maturity coarse particles were deposited. In the diagenesis, cracks were formed by differential compaction. These make the top and two wings of the palaeotectonic belt to be favorable oil and gas accumulation zones. Due to the relatively poor conditions of sedimentation and diagenesis away from the palaeotectonic belt, physical properties of the reservoirs became poor, so that a lithologic reservoir was formed on the palaeotectonic belt.

Key words: Tight gas reservoirs, Sweet spot, Palaeotectonic belt, Transition belt between Chuanzhong and Chuannan

中图分类号: 

  • TE122

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