Addressing the problems of different pressure systems and great reservoir difference of coal-bearing gas strata,and the poor adaptability of conventional gas production technology,a multi-layer and co-production technology of coal-series gas is put forward to further improve the development benefit of coal-bearing strata gas.According to the superposition type of coal-bearing gas in the study area and utili-zing the foundation of"three-pumping"equipment,a three-gas co-production technology pipe string based on the hollow sucker rod string is designed.The technology of pressure-divided and separate pro-duction in the same shaft with a"three-pumping+self-injection carrying liquid"combination is realized,which provides a technical reference for the three-dimensional development of coal-bearing strata gas res-ervoirs with different pressure systems in the same shaft.
Coal-bearing strata gasmulti-gas combined production technologysame wellbore systemseparate and combined mining
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