库车前陆盆地下侏罗统成岩作用

下侏罗统阳霞组和阿合组为库车前陆区的主要储层之一，为了证明成岩作用是控制储层发育的主要因素，文章通过野外露头及普通薄片、铸体薄片、扫描电镜和阴极发光等微观特征的研究，分析认为对储层影响较大的成岩作用是压实作用、溶蚀作用、胶结作用和破裂作用，其中压实作用是原生粒间孔隙的主要破坏者，溶蚀作用是储集空间的主要生产者。该储层主要发育4类成岩相：破裂--溶蚀相、溶蚀相、压实--溶蚀相和压实相，其中破裂--溶蚀相区的储层最有利，主要分布于吐格尔明及明南地区；而压实相区为非储层区，主要分布于依奇克里克构造带的西侧和吐孜洛克构造带南部。

DIAGENESES OF LOWER JURASSIC IN KUCHE FORELAND BASIN

The Yangxia Formation and Ahe Formation of Lower Jurassic are the main reservoirs in Kuche Foreland Basin. In order to prove that the diagenesis is the principal factor of controlling reservoir development， the microvisual characteristics of the reservoirs were studied by the aid of outcrop observation， common thin section analysis， cast thin section analysis， scanning electron micrography and cathodoluminescence analysis， etc. Through investigation， it was considered that the diageneses affecting obviously the petrophysical property of reservoir include compaction， cementation， corrosion and fracturing， in which the compaction was the main destroyer of primary intergranular pores， but the corrosion the principal constructor of reservoir rooms. There are four diagenetic facies in the reservoirs， i.e. fracturing corrosion facies， corrosion facies， compaction corrosion facies and compaction facies， in which the fracturing corrosion facies area is the most favourable reservoir area being mainly distributed in the Tuge’erming and Mingnan regions， but the compaction facies area is the nonreservoir area being mainly distributed in the western side of Yiqikelike structural belt and in the south part of Tuziluoke structural belt.