Abstract：Using rock thin section and scanning electron microscopy analysis of micro-testing techniques, Jiyang Depression Luojia area shale reservoir space can be divided into two major categories of pores and fractures. Pores can be divided into intercrystalline pores of clay minerals, carbonates minerals intercrystalline pores, pyrite intercrystalline pores, dissolved pores in clastic grains and micro-dissolved pores of grains five sub-categories. The fractures can be divided into diagenetic fractures and structure fractures, and the former can be subdivided into interlaminar fractures and grain boundary fracture. Fractures and matrix porosity exist between a micron scale coincides with, reflecting the development of reservoir space inherited characteristics. Oil and gas accumulate in a framework, where inter-layer cracks as the center, grain boundary cracks and other cracks and larger secondary carbonates intercrystalline pores for the skeleton, various types of intercrystalline porosity, clay pores and dissolved pores as the matrix. Lithologic reservoir space development are closely related with laminated argillaceous limestone and argillaceous limestone has better properties, physical properties, the corresponding shale has very low matrix permeability and good fracture conductivity.
Wang Yongshi,Wang Weiqing,Hao Yunqing. Shale reservoir characteristics analysis of the Paleogene Shahejie Formation in Luojia area of Zhanhua sag, Jiyang Depression[J]. JOPC, 2013, 15(5): 657-662.
