| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: method for obtaining production of high-viscosity oil or bitumen includes drilling and preparation of the formation for operation, at least by two adjacent pairs of horizontal parallel wells including injection well and production well located in formation below for production of high-viscosity oil, creation of permeable zone between injection well and production well of each pair of wells, pumping-in of water steam into injection wells and simultaneous extraction of product via production wells, pressure of water steam pumping-in in the injection well of the first pair of wells exceeds pumping pressure in injection well of the second adjacent pair of wells. At critical reduction of high-viscosity oil production rate and product watering of production wells into injection well of the first pair of wells there pumped in insulation compound and water steam pumping pressure is reduced, and in injection well of the second pair of wells water steam pumping pressure is increased. At repeated critical reduction of high-viscosity oil production rate and product watering of production wells into injection well of the second pair of wells there pumped in insulation compound and water steam pumping pressure is reduced, and in injection well of the first pair of wells water steam pumping pressure is increased. Alternating cycles of water steam pumping pressure reduction and increase into injection wells of adjacent pairs of wells with preliminary pumping-in of insulation compound into injection well, in which reduction of pumped water steam pressure is planned, are repeated not less than once.EFFECT: increase of high-viscosity oil production from underground formation due to extension of formation areas heated by steam and containing moveable oil.1 ex, 2 dwg |
