METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2003 - IPC

FIELD: development of oil pools; applicable in development of water-flooded pools. SUBSTANCE: method includes setting-up systems of monitoring and control of pressure between oil- and water-bearing parts of formation; maintenance of pressure in formation at level of values ensuring stabilization of static level in producing well wellhead zone; periodic oil withdrawal from wellhead zones of producing wells; determination of well water encroachment rate; filling of well with aqueous solution of mixture of nonionic and anionic surfactants with increased fraction of nonionic or anionic surfactant in mixture within 30-70% and their concentration from 0.01 to 5.0% depending on rate of well water encroachment; formation of interphase layer of microemulsive fringe with viscosity close to oil viscosity on oil-water contact. EFFECT: reduced rate of water cutting of oil. 3 cl, 3 ex