METHOD OF FLUID INJECTION INTO FORMATION Russian patent published in 2003 - IPC

FIELD: oil producing industry, particularly, development of oil deposits; applicable in maintaining of formation pressure by means of injection into formation of water or reagents for increase of oil recovery from formations. SUBSTANCE: method includes drilling of injection well, tapping of oil and water-bearing formations, lowering of pipe string, installation of interstratol packer, injection of fluid into formation. Lowered into injection well is double pipe string. Installed above drilled-in formations is additional packer. Lower end of one of pipes is installed within interval of water-bearing formation. This pipe is connected with accumulation vessel at wellhead for water or reagents for increase of oil withdrawal. Well pump is provided for supply of water from water-bearing formation into accumulating vessel. Lower end of other pipe is installed within interval of oil-bearing formation. This pipe is also connected with accumulating vessel. Injection into oil formation is carried out under continuous, or cyclic, or pulse conditions with monitoring from control panel. EFFECT: higher efficiency due to variation of conditions of fluid injection of fluid into formation, extended functional potentialities due to reagent injection and prolonged term of effective operation. 2 cl, 1 dwg