...井筒压降 注气开采 [gap=643]ilateral wells；coalbed methane；matrix shrinkage and swelling；mixed gas sorption；wellbore pressure loss；gas flooding ...
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Based on the model to calculate mixture loss, a new calculation model of pressure drop for stratified flow in horizontal wellbore has been developed by applying the momentum conservation equation.
在混合损失计算模型的基础上，应用动量守恒原理推导出了新的水平井筒气液两相分层流型压降计算模型。
Under production with constant pressure, the pressure loss in the wellbore has obvious effect on the production rate at the initial period.
当定压生产时，井筒压降损失在生产初期对产量影响较为明显。
Through an analysis on both seepage and pressure distribution of gas formation, we found that the pressure loss is mainly in near-wellbore area.
通过对气层渗流特征和压力分布特征进行分析，认识到气层压力的损耗绝大部分在近井区域。
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