OIL AND GAS DEPOSIT DEVELOPMENT METHOD Russian patent published in 2005 - IPC

FIELD: oil and gas production industry, particularly to develop oil and gas deposits in which gas, oil and water reservoirs are separated with impermeable rock layers.

SUBSTANCE: method involves drilling horizontal wells of two types. Well of the first type has cased side hole with sealed hole annuity directed upwards to cross impermeable layer and to open-up gas reservoir. Wells of this type are used as production ones. Well of the second type additionally have cased side holes with sealed hole annuity directed downwards to cross down impermeable layer and to open-up high-pressure water reservoir. Above wells are initially used as production ones, then as injection wells and once again as production ones. Control of gaseous or liquid product cross flow between reservoirs and inside reservoir is performed with the use of bypass regulating devices installed in wells between production reservoirs and energy-supply ones. The devices are operated from ground surface.

EFFECT: increased flowing time and oil output due to possibility to save reservoir energy, to control cross flow of gaseous or liquid product between reservoirs and inside reservoir.

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