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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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火山岩气藏压裂水平井产能预测新方法
Keywords: 火山岩气藏,压裂水平井,启动压力梯度,应力敏感,紊流效应,裂缝干扰
Abstract:
？火山岩气藏发育多尺度孔、洞、缝介质，压裂水平井投产具有多重介质接力排供气与非线性渗流的特征。引入新的拟压力函数，以等值渗流阻力法及叠加原理为基础，综合考虑气体滑脱效应、启动压力梯度、应力敏感效应及裂缝内紊流效应，构建了火山岩气藏水平井压裂多条横向裂缝相互干扰的产能预测新方法。结果表明：在气井生产过程中，近井筒附近，裂缝内需考虑紊流效应影响，启动压力梯度对气井产能影响最大，其次是应力敏感效应与紊流效应，滑脱效应影响最小|随着水平井段长度减小，裂缝条数增加，裂缝间干扰越严重，水平井段长度与裂缝条数存在一最佳匹配关系|随着裂缝半长增加，气井产量增大|裂缝导流能力变化对气井产量影响最明显，导流能力越大，气井累计产量越高，裂缝导流能力增加到一定程度时，气井产量随着导流能力增加幅度减小。
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