METHOD FOR DEVELOPMENT OF OIL DEPOSITS COMPLICATED WITH VISEAN EROSIONAL DOWNCUTS Russian patent published in 2007 - IPC E21B43/20 E21B43/30 

FIELD: oil production, particularly to develop layer-uplifted Bobrikovsko-Radaevsky oil pools made of terrigenous reservoirs and Tournaisian massive oil pool including carbonate reservoirs complicated with visean erosional downcut in the case of hydrodynamic oil pools communication.

SUBSTANCE: method involves more exactly determining oil presence outlines of oil pools and determining oil-saturation thickness of Bobrikovsko-Radaevsky reservoirs in visean erosional downcut; drilling producing and injection wells in visean erosional downcut side area; extracting product and injecting working agent in formation. At least one horizontal producing well and two injection wells are drilled. Horizontal producing well bore in located within the limits of Bobrikovsko-Radaevsky pool in visean erosional downcut in parallel to visean erosional downcut side line and obliquely to displacing working agent flow from horizontal or deviating injection well located outside the visean erosional downcut of Tournaisian oil pool. Horizontal bore is drilled in parallel to downcut side line and producing horizontal well bore. The second injection well is deviating within the limits of Bobrikovsko-Radaevsky pool in visean erosional downcut according to corrected designed network.

EFFECT: increased oil recovery due to effective development of above oil pools confined to visean erosional downcut sides, decreased oil production costs due to reduced number of wells to be drilled and decreased capital oil drilling costs.

1 ex, 2 dwg