DEVELOPMENT METHOD OF HIGH-VISCOUS OIL DEPOSIT Russian patent published in 2013 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: in the course of deposit development there drilled are horizontal production and injection wells by pairs parallel to each other one above the other, heat-transfer medium is pumped through injection wells and the product is extracted through production wells. Prior to drilling the pairs of horizontal wells, along the future horizontal bores there drilled are vertical exploratory bores alternatively from one and the other side at a distance of 10-30 m from future trajectory of horizontal bores with the distance between vertical exploratory bores 80-120 m. The profile of production oil horizon bedding and the profile of water-oil contact are defined by exploratory bores. Vertical exploratory bores are eliminated. The bottom horizontal bore of production well is drilled under water-oil contact. At the deposit there marked are the following horizontal bores of production and injection wells mainly parallel to the drilled horizontal bores. In the course of drilling of the next horizontal bores there performed are operations like drilling the first bores with location of the following bores mainly in parallel at the distance of 80-120 m from the drilled horizontal bores.

EFFECT: increasing oil recovery of deposit.

1 ex, 1 dwg