Method for injection wells injectivity determining enlarges foundation covering by waterflooding
Background The complexity of the problem of coverage of water flooding over the thickness of layers increasing is explained by the difficulty of modeling the processes occurring with fluid the pressure difference in the reservoir. Aims and Objectives: to create a model of controlled water injection, adjusting the thickness of the reservoir from injection pressure and reservoir pressure; to optimize the amount of water pumped into injection wells that provide the greatest coverage reservoir flooding in thickness. Methods Comparison of the calculated (model) parameters of the working thicknesses of the layers and injectivity in the various injection wells of Arlanskiy oilfield pressure pumping and reservoir pressure with the actual data. Results 1. Method for determining acceleration, providing the greatest coverage of flooding reservoirs, is used in the feasibility study of reconstruction of the flooding system. 2. Perforated layers of thickness less than 2... 3 m in some wells in the existing pump stations pressures do not accept water, the reservoir pressure does not increase, enrollment and injectivity decreases. This is due to the increased content of clay fractions with a decrease in permeability. The separate wells binding penetrated the «thin» layers, and the organization of differentiated water pumping with pressures on the mouths of wells up to 25 MPa. 3. The step-by-step water injection organization program in the oil field with increased waterflood covering is composed.