METHOD OF DETERMINATION OF OIL EXTRACTION FACTOR AT NONLINEAR FILTRATION

摘要

FIELD: oil-and-gas industry.;SUBSTANCE: proposed method comprises lab and geophysical studies of rock porosity, permeability, oil saturation and oil displacement and determination of pressure gradient field over the deposit area. Note here that collector and filtration-capacitive properties are defined in expanded pressure range and linear speed to make 1*10^-4 MPa/m and 1*10-4 m/days. Defined are statistic porous hydrodynamic and energy structure of rock including reserves of hydrocarbons in the filed of pressure gradients while said factor is calculated as the portion of threshold deposit volume per one producing well.;EFFECT: higher accuracy, reliability and accelerated determination.;1 ex, 3 tbl, 3 dwg