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基于非达西渗流和压力敏感性的页岩油压裂水平井产能计算方法

JIANG Boming,MU Langfeng,YAN Yiqun,LI Qi,WU Zhongbao, CHEN Jianyang

Petroleum Geology & Oilfield Development in Daqing(2023)

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Abstract
为了对页岩油压裂水平井产能进行定量评价,考虑非达西渗流和压力敏感性对页岩油产能的影响,运用保角变换方法和复势叠加理论,推导出存在启动压力梯度和压力敏感性的压裂水平井产能公式.运用该公式定量地计算出各个裂缝的产能,此外还分析了启动压力梯度、压力敏感系数、裂缝半长、裂缝条数等因素对产能的影响.结果表明,水平井的产能随着启动压力梯度、压力敏感系数的增大而减小;随裂缝半长和裂缝条数的增加而增大,但增大幅度逐渐减小.研究成果为页岩油压裂水平井的产能预测提供了依据.
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Key words
shale oil,horizontal well,startup pressure gradient,pressure sensitivity,productivity prediction
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