Sedimentary Facies and Sand Body Distribution Characteristics of He8 Member of Sulige Gas Field, Ordos Basin

He 8 is an important gas-bearing position of Sulige gas field. This study analyzed the sedimentary facies and sand distribution based on the core drilling, logging and logging data. It suggested that from north to south, the He8 member of the basin turned from braided river sedimentary facies to blanket shallow braided river delta, and to braided fluvial sedimentary facies include river and flood depositing two sub-phases, then to blanket shallow braided river delta, including delta plain, delta front, and pro-delta facies. The study of sand body distribution showed that the source direction along the plane of the distribution of the strip showed a change in the thickness of the differences, while the plane distribution was more continuous.