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苏里格庙地区二叠系山西组山 1、山 2段和石盒子组盒 8段储层岩石类型主要有石英砂岩、砂屑石英砂岩和岩屑砂岩 ,其成分成熟度较好 ,结构成熟度中等 ,并经历了压实作用、胶结作用和溶解作用等成岩作用 ,发育次生溶蚀孔、原生残余粒间孔和晶间孔。根据物性参数、毛管压力曲线及孔隙组合关系等 ,将苏里格庙地区储层划分为 4种类型。研究发现 ,辫状河和曲流河河道砂坝、辫状河三角洲和曲流河三角洲平原分流河道、辫状河三角洲和曲流河三角洲前缘水下分流河道是区内天然气的有利储集相带 ,并控制着高渗储层的分布 ,分选好、石英含量高、粒度较粗的石英砂岩是形成有利储层的基础 ,次生孔隙的发育是形成高渗储层的关键。
The Suligemiao area, Permian, Shanxi Province, the first group of Shan 1, 2 and Shixinzi Formation Box 8, are mainly composed of quartz sandstone, sand quartzite sandstone and lithic sandstone. The maturity of the reservoir is good and the structure is mature Medium degree, experienced diagenesis such as compaction, cementation and dissolution, developed secondary dissolution pores, primary residual intergranular pores and intergranular pores. Based on physical parameters, capillary pressure curve and pore combination, the reservoirs in Suligemiao area are divided into four types. The study found that braided and meandering river sand bars, braided river delta and meandering delta plain distributary channel, braided river delta and meandering delta front distributary channel are favorable reservoirs of natural gas in the area And controls the distribution of high permeability reservoirs. Well sorted quartz sandstone with high quartz content and coarse grain size is the foundation for the formation of favorable reservoirs. The development of secondary pores is the key to the formation of high permeability reservoirs.