METHOD OF EXTRA-HEAVY OIL AND/OR BITUMEN DEPOSITS DEVELOPMENT WITH HELP OF INCLINED WELLS Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises drilling ascending well section in oil hole with two exposed zones equipped with filters, filtration zone and steam injection zone and bottom located under roof at least 2 m, locating of production string with centralisers in said section for cyclic injection of heat carrier via them and oil string for oil extraction and before lowering said heat insulated string with pump, isolation of pipe space between filter and string, and locating the pump in oil string abode the filter in the boundaries of productive bed toe but under ascending section bottom. In compliance with this invention, identical design inclined wells are located at the angle to each other so that productive bed space accommodates one well steam injection zone is located above extraction zone of the other well by 5-10 m and 2-10 m lower then bed roof. Note here that spacing between adjacent inclined directed wells is kept equal to 30-100 m. Thick oil and bitumen are extracted with intermittent or continuous injection of steam and oil extraction.

EFFECT: higher efficiency.

2 cl, 1 ex, 1 tbl, 2 dwg