PROCEDURE FOR DEVELOPMENT OF HIGH VISCOUS OIL DEPOSIT Russian patent published in 2011 - IPC E21B43/24 

FIELD: oil and gas production.

SUBSTANCE: according to procedure for development of high viscous oil prior to well drilling payout bed is analysed to determine level of WOC - water oil contact and for elevations of bed top in form of cupola. Multi-bottomhole pressure well with differently directed horizontal sections is constructed. Horizontal producers are arranged perpendicular and lower to the said horizontal sections nearer to periphery of the cupola and above the level of the WOC. Horizontal pressure wells in the same interval are constructed between the horizontal producers with step between horizontal wells 50-400 m. Heat carrier is pumped into the pressure wells, while bed fluids are extracted from the producers. Temperature mode and pressure of pumped heat carrier are maintained during development of the bed in the multi-bottomhole well to miantain the level of the WOC below the level of horizontal producers as long, as possible.

EFFECT: reduced extracted product watering during development of high viscous oil deposit due to reduced controlled level of water-oil contact - WOC - in payout bed.

2 dwg