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地质论评  2001 

塔里木盆地库车坳陷下侏罗统砂岩储层性质的控制因素

Keywords: 砂岩储集性埋藏史构造侧向挤压库车坳陷下侏罗统塔里木盆地

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Abstract:

通过对4口钻井,4条地表剖面的地层沉积详细描述及相应的3000余块储层浅钻样品和近万个岩矿分析测试数据等翔实资料的分析认为,库车坳陷下侏罗统发育辫状三角洲沉积体系,三角洲平原的辫状分流河道和三角洲前缘的水下分流河道是主要的储集砂体。这套储层以吐孜洛克地区为界,东,西两区在成岩作用,储集性质和成因机制上均存在显著差异。经研究表明,砂岩粒径,地层埋藏史和构造侧向挤压是引起此差异的关键控制因素;时间域上主要表现为砂岩粒径对储集性质的影响,而空间域上储层特征的显著差异受控于地层埋藏史和构造侧向挤压。

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