Study On Drilling Stopped Recovery Method During The Polymer Flooding Period In The Western Part Of Second Southern Region In Sanan Of Daqing Oilfield

Be aimed at the problem that the high permeable strip is easy to form monolayerbreakthrough which mainly shows that monolayer breakthrough in the injection wells andwater cut rise in the production wells, due to the effect of the reservoir heterogeneity,which often happens during and after the drilling stopped recovery stage in the polymerflooding block, we studied the dynamic changes characteristics、the variety law of thestratum pressure before and after the period of drilling stopped and also in the process ofthe drilling stopped, by the dynamic analysis and numerical simulation method. Accordingto the analysis of the dynamic variety law on the well district during the period of thedrilling stopped in the polymer flooding block, formulated the recovery rules of thedrilling stopped recovery in the polymer flooding block, solved the problems that thewater cut changed great in the well district whose plane and interlayer contradictions wereoutstanding, further deepen the geological understanding of the block, so that we couldguide the developing adjustment schemes in different period of polymer floodingeffectively, and ensure the output steadily and also ensure the developing effect of thepolymer flooding block.