METHOD OF DEVELOPMENT OF OIL POOLS OBSTRUCTED BY EROSION TRENCH Russian patent published in 2008 - IPC E21B43/20 

FIELD: mining.

SUBSTANCE: method involves oil-bearing pool contour amendment and defining oil saturation thickness of reservoir rock in erosion trench, drilling production and injection wells, well product withdrawal and working agent injection to the stratum. According to the invention, a branched horizontal production well is drilled in highly permeable trench zone with branches reaching outside the trench to the low-permeable Tournaisian zone at the distance not exceeding two thirds of one branch length. The branches are positioned at one horizontal plane with ascending or descending main horizontal hole, and are perpendicular to the extrusion flow of working agent from vertical or tilted injection wells.

EFFECT: increased oil withdrawal due to reduction of well number and investment into drilling.

1 ex, 1 dwg