苏里格东区召51-统41井区储层特征及影响因素

Features and Influencing Factors of Reservoirs in the Zhao 51–Tong 41 Well Block, Sulige Gasfield

苏里格东区召51-统41井区气藏为典型的岩性气藏,主要勘探层位是盒8段、山1段。通过对岩心、铸体薄片、扫描电镜及物性资料的分析,对该区储层岩石学特征、孔隙类型、储层物性及其影响因素进行了研究。结果表明:该区储层岩石类型主要为岩屑砂岩、岩屑石英砂岩;储层为孔隙型储层,孔隙以残余粒间孔、溶蚀孔、晶间孔为主;孔隙结构具有中-小孔喉、分选中等、排驱压力高和主贡献喉道小的特点;同时储层具有低孔、低渗的特点。沉积环境和成岩作用是影响储层物性的主要因素。

The Zhao 51 -Tong 41 well block, east Sulige gasfield is a typical lithologic gas reservoir, He-8 Member and Shan-1 Member are the main exploration objects. Study of various data such as core, cast thin section, SEM and physical properties indicates that the block consists dominantly of lithic sandstone and lithic quartz sandstone with intergranular pore, intragranular pore and dissolution pore and pore structures characterized by medium to small throat, moderate sorting, high displacement pressure and small major throat. The reservoirs are characterized by low porosity and low permeability. Sedimentary environment and diagenesis is the main controlling factors of reservoir physical properties.