The Whole-Aperture Pore Structure Characteristics and Their Controlling Factors of the Dawuba Formation Shale in Western Guizhou

Since shale gas mainly occurs in pores, research on pore structure characteristics is the key to understanding accumulation mechanism. The of Lower Carboniferous Dawuba Formation Qianxi area, represented by well QSD-1, which obtains a daily flow 10,000 m3 and represents an important breakthrough investigation marine Upper Paleozoic region southern China, characterized high-pressure mercury compression experiments low-temperature adsorption (N2 CO2) with whole size. main controlling factors affecting development are discussed. (i) micropores mesopores more developed shale, macropores second most shales among contribute volume pore-specific surface area. (ii) microfractures interlayer pores clay minerals Formation, storage spaces for hydrocarbon gases. (iii) capacity area organic carbon content mineral shales, both have obvious positive correlation variation structure.