天然气地球科学

• 天然气地质学 • 上一篇    下一篇

四川盆地震旦系—寒武系大气田形成条件、成藏模式与勘探方向

魏国齐,杨威,谢武仁,谢增业,曾富英,莫午零,沈珏红,金惠   

  1. 中国石油勘探开发研究院廊坊分院,河北 廊坊 065007
  • 收稿日期:2014-10-14 修回日期:2015-03-12 出版日期:2015-05-10 发布日期:2015-05-10
  • 作者简介:魏国齐(1964-),男,河北乐亭人,教授级高级工程师,博士,主要从事石油天然气地质研究. E-mail:weigq@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05007-002)|中国石油天然气股份公司重大专项(编号:2011B-0603)联合资助.

Formation Conditions,Accumulation Models and Exploration Direction of Large Gas Fields in Sinian-Cambrian, Sichuan Basin

WEI Guo-qi,YANG Wei,XIE Wu-ren,XIE Zeng-ye,ZENG Fu-ying,MO Wu-ling,SHEN Jue-hong,JIN Hui   

  1. Langfang Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Langfang 065007,China
  • Received:2014-10-14 Revised:2015-03-12 Online:2015-05-10 Published:2015-05-10

摘要:

通过对四川盆地震旦系—寒武系沉积相、储集体和储层、烃源岩、古隆起演化等成藏条件的综合研究,认为:①长期继承性发育的大型古隆起、大型克拉通内裂陷、4套大面积分布的优质烃源岩、3套大面积分布的岩溶储层、原油裂解气是形成大面积高丰度油气聚集的有利条件;②古隆起不同部位发育不同的气藏成藏模式,继承性古隆起核部以古油藏“原位”裂解聚集成藏为主,继承性古隆起斜坡以晚期构造圈闭分散液态烃裂解成藏为主;③古隆起不同部位有不同的勘探方向,古隆起核部以寻找继承性古构造圈闭为主,也具备岩性地层气藏勘探的基础,古隆起斜坡以寻找大型高幅度喜马拉雅期构造圈闭为主。

关键词: 大气田, 形成条件, 成藏模式, 勘探方向, 震旦系—寒武系

Abstract:

According to comprehensive research on forming conditions including sedimentary facies,reservoirs,source rocks and palaeo-uplift evolution of Sinian-Cambrian in the Sichuan Basin,it is concluded that:(1)large-scale inherited palaeo-uplifts,large-scale intracratonic rifts,three widely-distributed high-quality source rocks,four widely-distributed karst reservoirs and oil pyrolysis gas were favorable conditions for large-scale and high-abundance accumulation|(2)diverse accumulation models were developed in different areas of the palaeo-uplift.In the core area of the inherited palaeo-uplift,“in situ” pyrolysis accumulation model of paleo-reservoir was developed,while in the slope area,pyrolysis accumulation model of dispersed liquid hydrocarbon was developed in the late-stage structural trap|(3)there were different exploration directions in different areas of palaeo-uplift.Within the core area of palaeo-uplift,we should mainly search for the inherited paleo-structural trap,which was also the foundation of lithological-stratigraphic gas reservoirs,while in the slope areas,we should mainly search for the giant structural trap in the Himalayan Period.

Key words: Large gas fields, Formation condition, Accumulation model, Exploration direction, Sinian-Cambrian

中图分类号: 

  • TE122

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