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

Innovations and Prospects of Development of Mining Machinery and Electrical Engineering

矿业工程;电工学

Almukhametova, E.M.^1 ; Gizetdinov, I.A.^1 ; Kilmamatova, E.T.^1 ; Akimov, A.V.^1 ; Kalinina, S.V.^1 ; Fatkullin, I.F.^1

Oktyabrskiy Affiliate of Ufa State Petroleum Technological University, 54a, Devon Av., Oktyabrskiy

452607, Russia^1

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

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/87/5/052001/pdf
DOI  :  10.1088/1755-1315/87/5/052001

来源: IOP

【 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.