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欠平衡钻井过程中由于井眼压力始终低于地层孔隙压力,可明显降低钻井作业对地层的伤害。欠平衡钻井作业需要额外的地面设备,如分离器和处理储存油藏流体的储罐。而选择欠平衡分离器和储罐的依据是地层流体的流入速度和总体积,但在现有文献中还没有预测油藏流体的流入速度和总体
During the underbalanced drilling process, the wellbore pressure is always lower than the pore pressure of the formation, which can obviously reduce the damage to the formation caused by the drilling operation. Underbalanced drilling operations require additional surface equipment such as separators and tanks to handle reservoir fluids. The selection of underbalanced separators and tanks is based on the inflow velocity and the total volume of the formation fluids, but in the existing literature there is no prediction of the inflow velocity of the reservoir fluids and the overall