METHOD FOR DEVELOPMENT OF OIL DEPOSIT

摘要

FIELD: oil production industry. SUBSTANCE: according to method, undertaken is displacement of oil by means of gas-liquid fringe which is pushed along bed by water. Gas-liquid fringe is created by successive injection into bed through injection wells of water solution of sodium carbonate and water solution of muriatic acid in equal volumes. Concentration of sodium carbonate and concentration of muriatic acid are determined from conditions of full saturation of fringe being created with carbon dioxide at bed pressure and bed temperature. Application of aforesaid method ensures increase of oil recovery due to larger embracing of deposit by flooding. EFFECT: higher efficiency. 1 tbl