Coal bed gas and sandstone gas simultaneous production pipe column and simultaneous production method

The invention relates to the technical field of coal bed gas exploration and development in unconventional oil gas, in particular to a coal bed gas and sandstone gas simultaneous production pipe column and a simultaneous production method.The coal bed gas and sandstone gas simultaneous production pipe column comprises an outer-layer casing pipe, an inner-layer casing pipe, an oil pipe, a first distribution system, a second distribution system and packers.The outer-layer casing pipe and the inner-layer casing pipe form a first annulus, and the outer-layer casing pipe and the inner-layer casing pipe form a second annulus; the inner-layer casing pipe and the oil pipe form a second annulus, the first distribution system, the second distribution system and the packer are located in the first annulus, the packer can separate two gas reservoir resources of coal bed gas and sandstone gas, and the first distribution system and the second distribution system can selectively communicate the two gas reservoir resources,