METHOD OF DEVELOPING WELL OIL RESERVOIR WITH HORIZONTAL TERMINATION Russian patent published in 2016 - IPC E21B43/16 E21B43/12 E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in developing heterogenous terrigene or carbonate producing beds with horizontal wells. In method of oil formation development with horizontal wells drilling or selection of already drilled horizontal well are carried out. Extracted at horizontal shaft intervals of productive formation, differing in properties. Tubing string is run in well with packer. Separated intervals of productive formation with packer. Pump, control devices in form of electric valves and pressure gauges-thermometers are lowered into well. Product is lifted to surface using pump via inter-tube space. Preliminary between intervals of productive formation there equipment for well local reinforcement is installed. Layout is lowered into well, consisting of packer, tubing string, casing valve equipment with lower electric valve for regulation of inflow via tubing string, pressure gauge-thermometer for measurement of pressure in tubing string in front of housing, upper electric valve for regulation of inflow from annular space in cavity of housing, pressure gauge-thermometer for measurement of annulus pressure, pressure gauge-thermometer for measurement of pump suction pressure and tubing string to wellhead. Development of well is performed in three stages with extraction of product via tubing string and annular space, only via tubing string and then only through annular space. Results of yields and water cut measurements are analysed. Interval of well is operated with lower water cut at shutdown interval with high water cut at initial high flow rate until bottom hole pressure and fluid level below optimum and during subsequent working flow rate with maintenance of stable bottom hole pressure. Well is operated to excess water cut of operated interval above water cut of second interval. Then both intervals are operated simultaneously and watering of both intervals is maintained at same level.

EFFECT: improvement of oil resources withdrawal along horizontal shaft of production well.

1 cl, 1 ex, 1 dwg