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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低渗透气藏水平井气水两相产能研究
Keywords: 低渗透,水平井,气水两相,产水量,启动压力梯度,应力敏感,滑脱,水气质量比
Abstract:
？低渗透含水气藏开发过程中，水平井底见水不仅增加了地层流体渗流的复杂性，而且降低了水平井产量。以气水两相渗流理论为基础，建立了气水两相运动方程，定义气水两相启动压力梯度以及气水两相广义拟压力，考虑应力敏感、滑脱效应、紊流效应和表皮效应对气水同产水平井产能的影响，利用保角变换方法推导出低渗透气藏中水平井气水两相三项式产能新公式。通过实例计算，利用新公式计算的无阻流量结果与实际产能测试结果相对误差较小，仅为5.13%，说明新公式精确可靠，且敏感性分析表明，水平气井产水量随着滑脱因子以及水气质量比的增大而增大，而随着启动压力梯度以及应力敏感指数的增大而减小，但启动压力梯度对产水量影响较小，若生产压差较大，启动压力梯度可以忽略不计。？
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