Use of precipitate formation technology to increase oil recovery under Tarasovskoye field conditions

[摘要] The article presents data about using the technology of precipitate formation on the basis of sodium sulfate under conditions of the Tarasovskoye field, located in the Yamalo-Nenets Autonomous District. This technology consists in a sequential injection into the formation of sodium sulfate and calcium chloride, which leads to the formation of a precipitate of calcium sulfate, which eventually blocks flushed zones and water-saturated zones, thereby enabling intensification of oil-saturated areas development. Injection of precipitation systems was carried out in injection well N0 775, the focus of which includes 6 producing wells. The daily production rate of the test production wells after the event has increased more than 2 times. In addition, the authors noted the positive results of changes in formation characteristics: a decrease in permeability, pressure conductivity factor and hydraulic conductivity in a water-saturated zone.

[发布机构] Oktyabrskiy Affiliate of Ufa State Petroleum Technological University, 54a, Devon Av., Oktyabrskiy; 452607, Russia^1

[效力级别] 电工学

[关键词] Calcium sulfate;Daily production;Field conditions;Formation characteristics;Injection wells;Precipitation systems;Sequential injection;Test production