中国石油勘探 ›› 2009, Vol. 14 ›› Issue (4): 34-39,9.

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松辽盆地南部长岭断陷深层碎屑岩天然气成藏特征及主控因素

李晶秋,苗宏伟,李立立,王立鹏   

  • 出版日期:2009-08-15 发布日期:2009-08-15

Characteristics and Main Controlling Factors of Gas Accumulation in Deep Clastic Rocks of Changling Fault Depression in Southern Songliao Basin

Li Jingqiu,Miao Hongwei,Li Lili and Wang Lipeng   

  1. Li Jingqiu, Miao Hongwei, Li Lili, Wang Lipeng Exploration and Development Research Institute, PetroChina Jilin Oilfield Company, Songyuan City, Jilin Province 138001
  • Online:2009-08-15 Published:2009-08-15

摘要: 在总结现有勘探成果的基础上,从烃源岩条件、储层条件、盖层条件、输导条件及成藏期次5个方面,对松辽盆地南部深层登娄库组碎屑岩的天然气成藏条件进行探讨。认为深层碎屑岩领域具有生、储、盖条件优越、输导路径畅通、成藏期相对较晚等有利于天然气成藏的条件,勘探前景广阔。同时指出该区天然气运移和聚集受到沙河子组烃源岩的展布、深大断裂分布、储层物性和有利沉积微相以及成藏条件与供烃时限的有效配置等多种因素的控制。最终归纳出"多灶供烃、复合输导、物性控藏","单灶供烃、垂向输导、构造控藏"和"单灶供烃、侧向输导、不整合控藏"3种成藏模式。

关键词: 深层, 碎屑岩, 成藏条件, 主控因素, 松辽盆地南部, 长岭断陷, 登娄库组

Abstract: Based on the current exploration results, the gas accumulation conditions of clastic rocks in Denglouku Formation in southern Songliao Basin are discussed from the perspectives of source rocks, reservoirs, cap rocks, transporting conditions, and accumulation periods of time. In addition to superior source-reservoir-cap conditions, unrestricted carrying paths, and late accumulation period, the deep clastic rocks have other conditions favorable for gas accumulation and as a result have broad prospect for exploration. The gas migration and accumulation is controlled by the distribution of source rock in Shahezi Formation, the distribution of inherited fundamental faults, the physical property of reservoir bed, favorable microfacise and the effective matching of reservoir formation conditions to the time-limit of hydrocarbon supplying. To summarize, there are three accumulation modes, that is, "multiple source, compound migration, physical property controlling reservoir formation", "single source, erect migration, structure controlling reservoir formation" and "single source, lateral migration, unconformity controlling reservoir formation".

Key words: deep zone, clastic rock, conditions of gas accumulation, main controlling factors, southern Songliao basin, Changling fault depression, Denglouku Formation

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