Taking the B bed of the second submember of the second member of Triassic Jialingjiang Formation in Moxi gas field as an example,the basic characteristics and controlling factors of the Khali powder dolomite reservoir is analyzed systematically,and the genesis and forming mechanism of the powder crystal dolomite are examined.Logging and core analysis show that the reservoir has intercrystalline pores and intercrystalline dissolved pores as the main storage space,mainly lamellar throats,good configuration be...