西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (1): 6-12.

• 地质勘探 • 上一篇    下一篇

龙女寺构造须家河组天然气成藏主控因素

袁海锋1,倪根生2,邓小江3   

  1. 1.“油气藏地质及开发工程”国家重点实验室 成都理工大学,四川成都6100592. 中国石油西南油气田分公司低效油气开发事业部,四川成都6100593. 中国石油川庆钻探工程有限公司地球物理勘探公司,四川成都610225
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-02-01 发布日期:2012-02-01

Control Factor of Natural Gas Accumulation in Xujiahe Formation,Longnüsi Structure,Sichuan Basin

Yuan Haifeng1, Ni Gensheng2, Deng Xiaojiang3   

  1. 1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China2. Low-Efficiency Hydrocarbon Development Department,Southwest Oil & Gas Field Company,Petrochina,Chengdu,Sichuan 610017,China3. Geophysical Exploration Company,Chuanqing Engineering Company Limited,Chengdu,Sichuan 610225,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-02-01 Published:2012-02-01

摘要: 龙女寺构造须家河组天然气藏为较典型的岩性油气藏,其圈闭闭合高度低、储层致密、气水分布关系复杂。分析了须家河组气藏的烃源岩、储集岩、盖层和圈闭条件,认为其成藏条件优越;利用磷灰石裂变径迹技术和Easy%Ro化学动力学模拟技术重建了烃源岩的生烃演化史,结合构造演化再现了须家河组气藏的充注过程,将其分为3 个成藏阶段,中侏罗世末期的油气初次充注期,白垩纪末的大规模充注期和喜马拉雅期的气藏改造和重新定位阶段。指出了须家河组岩性气藏成藏的主控因素:优质烃源岩的发育是物质基础,古今构造均处于油气运移的有利指向区,储集物性和圈闭闭合高度控制了气水的分布,局部裂缝发育带则是成藏及高产的关键因素。

关键词: 四川盆地, 龙女寺构造, 须家河组, 成藏主控因素, 磷灰石裂变径迹

Abstract: The natural gas reservoir in Xujiahe Formation of Longnüsi structure is a typical lithologic gas reservoir,with the low trap closure,the tight reservoir,and the complicated gas-water contact. The paper analyzes the source rocks,reservoir rocks,cap rocks and trap conditions of gas reservoir of Xujiahe Formation,and conculdes that the Xujiahe Formation is advantageous
play. The Apatite Fission Track and Easy%Ro Chemical Kinetics Simulatiom are both used to reconstruct the hydrocarbongeneration
history of source rock. Combined with the structural evolution,the charging process of Xujiahe Formation gas
reservoir was reproduced. The accumulation process is divided into three phases:early hydrocarbon charging at the end of
middle Jurassic,the dominant hydrocarbon charging period at the end of Cretaceous,and the final accumulation of gas pools
during Himalayan. The main controlling factors of gas accumulation in Xujiahe Formation are analyzed in the paper. Highquality
hydrocarbon source rock is the primary material,the ancient and present structural high are the available zones for
the hydrocarbon migration,the reservoir physical property and the trap closure control the gas-water distribution in the gas
reservoir,and the fractures developed locally is a key factor of gas accumulation and high productivity in the Xujiahe Formation.

Key words: Sichuan Basin, Longnüsi structure, Xujiahe Formation, the controlling factors of gas accumulation, apatite fission track

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