Classification and controlling factors of organic pores in continental shale gas reservoirs based on laboratory experimental results

The controlling factors of organic pores in the study area are vitrinite reflectance and the rock brittleness index. Particularly, thermal evolution controls the development of organic pores through different vitrinite reflectances (Ro) with specific total organic carbon (%) of shale. In addition, relative brittleness indexes combined with the degree of diagenesis and evolution are calculated using a mineral constituent method. The results show a positive correlation between the gas pore groups distribution and the rock brittleness index based on the relationship between relative brittleness indexes and the number of organic pores in the samples.