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以苏里格气田桃X区块上古生界二叠系盒8段储层为例,采用铸体薄片鉴定、电镜扫描、阴极发光、镜质体反射率、X线衍射及流体包裹体测温等多种分析测试手段,对储层的成岩作用、成岩序列及孔隙演化进行研究.研究结果表明:造成储层致密的主要原因是成岩期强烈的压实作用、压溶作用及石英、方解石和高岭石的胶结作用,而溶蚀作用对储层次生孔隙形成起到建设性作用;储层成岩作用阶段已达中成岩B亚期,根据控制孔隙演化的主要成岩作用,将储层成岩相划分为6种类型,阐述了各成岩相类型的孔隙演化模式,其中溶蚀-胶结相、高岭石-硅质胶结相为形成储层主要成岩相.1
Taking the 8th Permian Box 8 reservoir in the Upper Paleozoic of the Tao X block in the Sulige gas field as an example, the authors used the identification of castings, electron microscopy, cathodoluminescence, vitrinite reflectance, X-ray diffraction and fluid inclusion temperature measurement And other analysis and test methods to study the diagenesis, diagenesis and pore evolution of reservoirs.The results show that the main reason for the tight formation of reservoirs is the strong compaction during diagenesis, the compaction and dissolution of quartz, calcite and Kaolinite cementation and dissolution plays a constructive role in the formation of secondary pores in reservoirs. The reservoir diagenesis stage has reached mid-diagenetic B sub-stage. According to the major diagenesis that controlled the evolution of porosity, the reservoir diagenetic facies The types of pores are divided into six types, and the pore evolution patterns of each diagenetic facies are expounded, in which dissolution-cementation phase and kaolinite-siliceous cementation phase are the main diagenetic facies of reservoirs.1