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Geothermal wells with water hammer during injection fall-off test: Numerical pressure transient analysis
Geothermics ( IF 3.9 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.geothermics.2020.101838
Azhari S. Adiputro , Sadiq J. Zarrouk , Richard J. Clarke , Virginie Harcouët-Menou , Stijn Bos

Abstract Extended pressure fall-off test data of low permeability wells can display oscillations that cannot be easily interpreted by using the existing analytical pressure transient analysis (PTA) methods. Additionally, water hammer effects resulting from wellhead valve shutting off are observed immediately after valve closure. Numerical PTA applied to well MOL-GT-03, Belgium, using 1-D radial model with fractional dimension grid gave a good match with field data clearly indicating low reservoir permeability and the fractured nature of the reservoir. In addition, the water hammer effect was investigated by solving the wave equation to help identifying the extent of the well reach providing an estimate to the reservoir boundary.

中文翻译:

注入衰减试验期间具有水锤的地热井:数值压力瞬态分析

摘要 低渗透井的扩展压力下降试验数据可以显示使用现有分析压力瞬态分析(PTA)方法无法轻易解释的振荡。此外,在阀门关闭后立即观察到由井口阀门关闭引起的水锤效应。数值 PTA 应用于比利时 MOL-GT-03 井,使用带分数维网格的一维径向模型与现场数据很好地匹配,清楚地表明低储层渗透率和储层的裂缝性质。此外,通过求解波动方程来研究水锤效应,以帮助确定井段的范围,从而估计储层边界。
更新日期:2020-09-01
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