巴喀地区西山窑组致密砂岩储层成岩作用研究

通过岩芯及薄片的观察，结合扫描电镜、X 衍射和阴极发光等资料分析，对巴喀地区西山窑组致密砂岩储层成岩作用进行了研究。结果表明：巴喀地区西山窑组在辫状河三角洲相和湖泊相环境下形成了一套低孔、低渗的长石质岩屑砂岩和岩屑砂岩；成岩作用主要处于中成岩A 期，主要的成岩作用类型有压实作用、胶结作用和溶蚀作用，其中，压实作用对储层的破坏性最大，溶解作用对储层有一定的建设性作用。

Diagenesis of Tight Sandstone in Xishanyao Formation of Baka Aera

Diagenesis of tight sandstone in Xishanyao Formation Baka aera is carried out by observing the core in the field andidentifying thin section as well as analyzing scanning electron microscope（SEM），X-ray diffraction and cathodoluminescence.The results indicate that feldspathic litharenite and litharenite with low porosity and permeability are reservoirs in XishanyaoFormation in Baka area under the environmental effect of braided river delta and lacustrine facies. Diagenesis is at mesogenetic Astage，and its types involve compaction，cementation，dissolution with compaction as the most destructive effect and dissolutionas main constructive diagenesis.