WELL FLOW RATE INCREASING METHOD Russian patent published in 2010 - IPC E21B47/10 E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: flow rate increasing method of oil and gas wells consists in the fact that all productive formations of the well are brought into simultaneous operation. For that purpose, the well is drilled to one formation, offshoots are drilled, and in case of lower formations the well is drilled ahead, and annular space in the zone of formations is cemented. Secondary drilling of all formations is performed. Prior to the beginning of production, there installed are geophysical instruments in the zone of each drilled formation. Fluid level in the well is smoothly decreased by swabbing or by means of jet pump; then instruments are removed and as per their readings there determined are values of bottom-hole pressures in wells, at which formations are brought into operation. As per the same data there determined are formations subject to formation cross flows, and the latter are eliminated. Then geophysical instruments are again installed in the zone of each formation, and a jet pump is lowered to the well to design depth. During the repair period of jet pump there analysed are readings of geophysical instruments, and if formation cross flows are detected due to production of formations, formation cross flows are eliminated. Jet pump is lowered again and production is continued with the specified repetition of repair periods and with elimination of formation cross flows.

EFFECT: increasing production efficiency of oil and gas owing to shifting single-formation wells to multiple-formation production and detection and elimination of cross flows prior to production.