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Effect of pressure systems on the development effectiveness of 125m polymer blocks

Since the industrial polymer drive development in the oilfield, eight blocks have experienced polydrive development successively. With the extension of the development time, the extraction well spacing of polymer drive blocks has been reduced. After the reduction of well spacing, the influence of whether an effective pressure system can be established on the development effect gradually increases, and the minimum value of pressure space rises from about 0.5 MPa to 1.5 MPa, and the value of improved recovery rate is nearly 3 percentage points less with the same subsurface pore volume PV number injected. In this paper, we study the pressure system to find out the influence of pressure system on the development effect of 125m polymer block, and take adjustment measures to improve the development effect of poly-drive.