PROCESSING OF OIL WELL PRESSURE RECOVERY CURVES
Abstract
In the article the development of a mathematical model describing the PRC is studied on the base of pressure recovery curve method.
Detailed processing of the pressure recovery curve made it possible to determine the deterioration of reservoir permeability in many wells. Here two methods are considered - stationary (steady conditions of selection) and non- stationary.
The article proves that the use of these methods allows to develop a mathematical model to increase the determination of this task.
On the base of numerical simulation, the following facts had impact on the results of the pressure recovery curve: well shutdown time, taking into account the initial transition section, taking into account curve change section before well shutdown.
The study of variable factors impact on the results is carried out by interval estimation.
The mathematical model describing the pressure recovery curve is local and changes its structures. This model can be used in industry conditions.
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