沿水平井简从趾端至跟端存在压力降,且水平井射孔完井沿整个水平井简射孔参数一般相同,导致水平井跟端过早见水,因此研究水平井射孔参数分段组合优化控制沿水平井筒入流速度剖面对水平井稳油控水尤为重要。基于水平井筒入流速度剖面控制原理,综合考虑水平井筒管流、井壁入流、地层渗流等因素的相互影响,建立了水平井射孔参数分段组合优化模型。对比分析不同射孔参数组合条件下分段优化调控入流剖面的效果,结果表明,射孔密度是调控水平井入流速度剖面最重要的参数,射孔枪弹类型、射孔相位角、射孔方位角是调控水平井入流速度剖面的次要参数,且优化参数越多,水平井入流速度剖面优化效果越好。图6表3参20
Because of the pressure loss from the heel to the toe of the horizontal well, and the uniformity of perforating parameters along the whole horizontal wellbore, the earlier water breakthrough and higher water cut will be caused. So the sectional combination of perforating parameter to control the inflow profile along the wellbore is very important to control the water cut in the horizontal well. Based on the inflow control theory of horizontal well, considering the wellbore pipe flow, the wellbore inflow, formation filtration and other factors comprehensively, the sectional combination optimization model of perforating parameters of horizontal well was established, and the results of sectional optimization to control inflow profile with different perforating parameters combination were compared and analyzed. The result shows that the perforating density is the most important parameter in the controlling of inflow profile, besides that, the charge type, the perforating phase angle and the perforating angle of orientation are also important. With more parameters, the result of the optimization of inflow profile gets better.