PROCEDURE FOR DEVELOPMENT OF HEAVY OIL AND BITUMEN DEPOSITS Russian patent published in 2011 - IPC E21B43/24 

FIELD: gas and oil production.

SUBSTANCE: procedure consists in construction of horizontal producer and vertical pressure wells, in pumping working substance into pressure wells and in withdrawal of product from producer. The pressure wells are arranged with a grid 50-100 m above the horizontal producer. Also, end wells are 5-10 m higher, while the middle ones are positioned between the end wells in an upper quarter of a pay. Pressure wells opening up is performed along total interval of the pay opened with them. The horizontal well is equipped with temperature sensors along total length with analysis of temperature at sections corresponding to end pressure wells. When temperature at the section is close to temperature of outbreak, the pressure well corresponding to a given zone, and end one from bottomhole, is insulated in interval of 5-15 m. Further, temperature in the producer is controlled and interval-by-interval cut-off in end pressure wells is performed similarly to a level of the medium pressure wells.

EFFECT: raised recovery of oil.

4 dwg