EXPLORATION PROSPECT AND GAS RESERVOIR CHARACTERISTICS OF XUJIAHE FORMATION IN SICHUAN BASIN
EXPLORATION PROSPECT AND GAS RESERVOIR CHARACTERISTICS OF XUJIAHE FORMATION IN SICHUAN BASIN
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发表时间：
2008
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通讯作者：
Peng Jun
中科院分区：
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作者：
Peng Jun
本文阐述了四川盆地须家河组的成岩特征，指出该组是在上扬子地台西缘海相碳酸盐台地基础上形成的一套含煤碎屑岩架层，具有独特的生、储、盖组合，是四川盆地最具勘探前景的层系之一。须家河组气藏发育三套以岩性气藏、构造-岩性复合气藏为主要赋存方式的“三型”成藏组合，具有成藏组合多、含水饱和度高、气水演化复杂、气藏类型多样、受烃源、储层、研究表明，四川盆地须家河组天然气成藏条件和匹配性总体较好，存在5个天然气有利聚集区，具有良好的勘探前景。
The reservoir-formimg characteristics of Xujiahe Formation in Sichuan Basin are stated in this paper,and also,it is pointed out that the formation is a set of coal- bearing clastic rack strata formed on the base of marine facies carmonate platform in the western margin of upper Yantz platform,it is one of the most prospective formations in Sichuan Basin due to the exclusive hydrocarbon generation,reservoir and cap association.Vertically,in the Xujiahe Formation gas reservoirs,three sets of sandwich-like reservoir-forming associations develop,which takes lithologic gas reservoir,structural-lithologic combination gas reservoir as the main existing way,and is of the characteristics of multiple reservoir-forming associations,high water saturation,complicated gas and water eolation,diverstified gas reservoir types,and controlled by hydrocarbon source,reservoirs,ancient and present structures and foreland basin texture.The research indicates the reservoir-forming conditions and the matching of Xujiahe Formation in Sichuan Basin are generally good.There exist five favorable gas accumulation areas with bright explorative prospect.