METHOD OF INCREASING FORMATION OIL RECOVERY Russian patent published in 1997 - IPC

FIELD: oil producing industry; applicable in increasing of oil recovery at early and late periods of deposit development. SUBSTANCE: in the course of water supply through injection wells, continuous registration of pressure in injection pipeline and flow rate of each water portion is carried out. Water flow rate is registered on each well in injection of the design volume of water at any stage of formation of the front of oil displacement with water. Value of the intake efficiency of wells is calculated. Comparison of the values of the intake efficiency of wells watered at the initial, intermediate and final stages of formation of the front of oil displacement with water, allows estimation of quality of this front. EFFECT: reduced oil losses in deposit development, increased production rate and decreased terms of deposit operation, simplified control with use of process parameters determining the formation of front of oil displacement with the use of the standard methods. 4 cl, 1 dwg