Production of reserves of oil- water zones of low-viscosity oil deposits

Abstract

Abstract The authors state that during the production there is the process of transition of deposits to the category of bottom water-drive reservoirs due to frontal displacement by the injected water. As a result, the nature of water flooding becomes similar to the primary areas of bottom water-drive reservoirs. It is shown that for water-drive areas, the development is characterized by unfavorably high input values of water flooding and its intensive growth in the range of oil recovery factor from 0.1 to 0.3 fractions of units. The nature of the displacement curves of areas with water-oil zones (WOZ) is identical and differs only by the amount of water flooding of oil reserves in a deposit or area, which allows drawing a conclusion about a similar mechanism of oil displacement, which is characteristic of oil reservoir. It is shown that the main feature that characterizes the development of areas and deposits with water-oil zones is the increase in water flooding at the first stage of production.