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.
Published Version
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