Evaluating Waterflood Efficiency with Multiwell Retrospective Pressure Analysis

The efficiency of waterflood becomes crucially important when initial reservoir pressure is depleted and the aquifer is proven to be weak. In order to maintain pressure, one must carefully calculate injection / production wells rate, injection targets, define the optimal locations for new injection wells or justify switching producers to water injection. All of these tasks require the cross-well pressure impact data. Paper describes solution of these tasks on a field in Aktobe region, Kazakhstan.