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本文通过研究韩城区块煤层气井抽油机平均冲次与日产气量的关系,揭示了抽采制度对煤层气井产能的影响。当抽采能力较强时,煤层中容易形成稳定水相流动,导致排水泄压效果差,不利于煤层气产出;当抽采能力较强时,产水阶段煤层压力充分释放,煤层气解析量大,气体相对渗透率大,气体产量高。
In this paper, we study the relationship between the average number of pumping times and the daily gas production in Hancheng block coal-bed gas well and reveal the influence of gas drainage system on the productivity of coalbed methane wells. When the pumping capacity is strong, the formation of stable aqueous phase tends to form in the coal seam, resulting in poor drainage pressure relief effect, which is not conducive to the output of coalbed methane. When the pumping capacity is strong, the coal seam pressure in the production stage is fully released and the CBM is analyzed Large amount of gas relative permeability, high gas production.