METHOD OF DEVELOPING NONUNIFORM OIL FORMATION Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, microbiological and hydrodynamic methods increasing formation oil production. SUBSTANCE: method of development of nonuniform oil formation drilled-out at least by one injection and several producing wells includes alternation of periods of increase of pressure due to water injection into injection well with shut-in producing wells, and periods of pressure reduction to withdrawal of fluid from producing wells with shut-in injection well. Method includes injection of microorganism culture in solution of nutrients into injection well during raising of pressure so that injection ending combines with completion of period of pressure increase. Culture of microorganisms in solution of nutrients is injected not only into injection well but also into reducing producing wells. In this case, injection of culture of microorganisms into solution of nutrients into reacting producing wells is carried out so that start of injection is combined with end of pressure reduction period, i.e. with start of shut-in of producing wells, and after completion of injection to start of operation of producing wells remains not less 3-5 days. In so doing, for high-temperature oil formation, injected into injection well is culture of mesophilous and into producing well, thermophilous microorganism culture is injected. EFFECT: higher efficiency. 2 cl, 1 dwg, 1 ex