The Fine Numerical Simulation Study Of Tapping The Potential In Water Flooding After Polymer Flooding In Areal Well Pattern Of Xing4-6

Polymer flooding has played a great role for high and stable yield in Daqing Oilfield. After polymer flooding enhances further oil recovery, there is still a part of remaining oil in the formation which is not produced. Therefore, to carry out the research on water flooding fine potential tapping measures after polymer flooding for tapping the potential of remaining oil of polymer flooding, enhance further oil recovery and has a vital significance to guide polymer flooding exploitation in the subsequent polymer injection block.In this paper, the target block is area well pattern of Xing4-6 in Daqing oilfield and carries out polymer flooding after water flooding. Using the geological modeling software Petrel to establish 3D geological model of the target block water flooding stage which was sedimentary facies controlled, combined with numerical simulation software Eclipse to make the history match of the water flooding stage and study the causes and types of the remaining oil distribution after water flooding. Establish 3D geological model of the target block polymer flooding stage which was sedimentary facies controlled, using the history matching technology of the separated layer polymer injection to make the history match of the polymer flooding stage and study the causes and types of the remaining oil distribution after polymer flooding to make prediction of the subsequent water flooding development. Aim at water flooding fine potential tapping measures adjustment after polymer flooding, this paper study mainly from these five aspects which includes stopping high permeability formation, fracturing, water plugging, injection production system adjustment and cyclic waterflooding. First of all, analyze the distribution of target block subsequent water flooding potential, aim at subsequent water flooding potential larger regions to respectively carry out the above adjustment measures. Analyze typical stop hyperosmotic injection wells flooding effect and put forward the measure schemes. Selecting oil and water wells according to the principle of fracturing, water plugging and injection production system adjustment to make measure adjustment, and analyze the measures effects.Finally giving area well pattern of Xing4-6 the optimal measure scheme for tapping potential adjustment according to the above water flooding effect comprehensive analysis results...