Application of Hall plot method to monitor and forecast the efficiency of water injection
Water injection is the most commonly used method to maintain reservoir pressure when reservoir pressure is under saturated pressure in most oil fields in Vietnam and in the world. Therefore, monitoring and rapid prediction of the efficiency of water injection are a very important task to improve oil recovery. An effective and simple method that can be applied to monitor and predict the efficiency of water injection is the Hall graph. The methods which are presented in this paper are Hall Plot (1963) and Derivative Hall Plot (2009). Hall proposed a qualitative method to analyse injector well performance based on plot between cumulative drawdown pressure against cumulative water injected. This paper analyses the advantages and disadvantages of the Hall method, and thereby builds a programme to analyse the performance of a water injection well.
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