ОЦЕНКА ЭФФЕКТИВНОСТИ МЕТОДА ФИГУРНОГО ЗАВОДНЕНИЯ

Abstract

Methods of regulating the development of oil and gas fields play an important role in ensuring rational selection rates at the highest values of reservoir component recovery coefficients. The applied methods allowed the most rapid selection of recoverable oil reserves, but nevertheless, over time, many individual areas of the deposit were identified, whose reserves were developed at a low rate. Therefore, to improve the development of hard-to-recover reserves in these areas, zones, additional methods of influence are used by injecting a certain volume of water into the reservoir through new injection wells created by drilling them or transferring existing high-water wells for injection. At the same time, work is being carried out in existing wells to increase their productivity. This article discusses the application of figure flooding method as an additional method of regulating the development process of the Uzen deposit. The authors presented the results ДОБЫЧА 112 НЕФТЬ И ГАЗ 2020. 3–4 (117–118) of analysis of exploitation of oil areas of figure flooding. A study was conducted to identify the technological effect of the use of the figure flooding method. Figure flooding contributed to unsteady state fluid flow in reservoirs, which led to the reduction of water production wells before working intervals and also in some areas.This method hashad a positive impact on the development process by connecting new production intervals to the operation. The inclusion in the development of new productive formations and layers led to an increase in the flow rates of wells and oil production, as well as simultaneously to a decrease in the flow rates, liquid production and water cut. The quantitative assessment of efficiency was carried out by comparing the corresponding actualandcalculatedtechnological indicators.Thepaperpresentsanalyticalformulas thatwereused to calculate changes in the analyzed data in case there was no specified method. The calculated values of oil and liquid flow rates and water level of sections of the XIV and XV horizons were determined under the assumption that there would be no figure flooding. The results of calculations of technological indicators and processing of actual data, as well as the technological advantages of individual sections are presented. It is established that the use of shaped flooding in the complex will allow full connection to the work of new oil-saturated reservoirs, if new independent systems of arrangement are created to ensure the appropriate hydrodynamic parameters of pressure at the mouths and faces of injection and production wells