石油学报 ›› 2011, Vol. 32 ›› Issue (6): 985-990.DOI: 10.7623/syxb201106008

• 地质勘探 • 上一篇    下一篇

柴达木盆地三湖地区第四系岩性气藏形成的主控因素

郭泽清 1,2  孙  平 2  徐子远 3  张  林 2  张绍胜 2  田继先 2   

  1. 1中国石油勘探开发研究院  北京  100083; 2中国石油勘探开发研究院廊坊分院  河北廊坊  065007; 3中国石油青海油田公司勘探开发研究院  甘肃敦煌  736200
  • 收稿日期:2011-04-20 修回日期:2011-07-24 出版日期:2011-11-25 发布日期:2012-01-17
  • 通讯作者: 郭泽清
  • 作者简介:郭泽清,男,1976年3月生,2004年获中国石油大学(华东)硕士学位,现为中国石油勘探开发研究院在读博士研究生,主要从事天然气地质研究。
  • 基金资助:

    国家科技重大专项(2008ZX05007)资助。

GUO Zeqing 1,2  SUN Ping 2  XU Ziyuan 3  ZHANG Lin 2  ZHANG Shaosheng 2  TIAN Jixian 2   

  • Received:2011-04-20 Revised:2011-07-24 Online:2011-11-25 Published:2012-01-17

摘要:

柴达木盆地三湖地区第四系是在第三纪末期新构造运动作用下,盆地沉积中心由西向东整体迁移的产物,在第四系中发现了世界上最大的生物气田(背斜气田)。近年来,在三湖地区第四系发现了岩性气藏,现已发现的岩性气(层)藏可分为砂岩上倾尖灭型、砂岩透镜体型和物性侧向变化型3种类型。该地区岩性气藏平面上分布受控于流体运移方向和构造背景,纵向上分布受控于砂体类型和埋藏深度,最终能否成藏受控于天然气聚散的动态平衡。

关键词: 三湖地区, 第四系, 早成岩, 岩性气藏, 主控因素

Abstract:

The Quaternary in the Sanhu area of Qaidam Basin, a product of the basin depositional center shifting from west to east under neotectonic movements at the end of Tertiary, has trapped the largest worldwide biologic gas accumulation(an anticline gasfield). In recent years, 3 types of lithologic gas reservoirs, including the updip pinch-out sand, lens sand and sand with lateral change in physical properties, have been identified. It has been found that in the study area the orientation of fluid migration and the tectonic background controlled the lateral distribution of lithologic gas reservoirs while the vertical distribution of these reservoirs was dominated by sand types and burial depths, but it was the dynamic equilibrium between the accumulation and dispersion of natural gases that substantially controlled the final formation of these reservoirs. This study is of theoretical significance in further exploration of lithologic gas reservoirs.

Key words: Sanhu area, Quaternary, early diagenesis, lithologic gas reservoir, controlling factor