Study On The Storage Of Continental Shale In Block H

Songliao basin is a large Cenozoic continental depression basin and an important oil and gas development area in China.The study area of this paper is in the deep lake semi deep lake shale development section of Qingshankou formation.In view of the problems that the main controlling factors affecting the reservoir property of Block H are not determined,the pore size distribution characteristics of shale reservoir are not clear,and the porosity test results are different,this paper analyzes the reservoir of block h by means of scanning electron microscope,low-temperature nitrogen adsorption experiment,high-pressure mercury injection experiment,total organic carbon content test,vitrinite reflectance test,XRD whole rock analysis and so on.The results of geochemical geological experiments show that the study horizon mainly develops clay silt shale containing carbonate rock and clay shale containing carbonate rock silt.The average abundance of organic matter is 2.19%,the type of organic matter is mainly typeⅡ₁,and the average reflectance of vitrinite is 0.92%.SEM results show that interlayer pores of clay minerals,intragranular pores of inorganic minerals and a small amount of organic matter pores are widely developed in the study area.The results of low-temperature nitrogen adsorption experiment and high-pressure mercury injection experiment show that the pore type with the largest contribution to pore volume and specific surface area of shale in the study area is mesoporous.Based on the experiment,this paper finally analyzes the influencing factors of reservoir parameters,and establishes the prediction model of reservoir parameters.The application results of the model show that the prediction of pore volume is effective and feasible,and there is a large deviation compared with the prediction of surface area.