METHOD TO OPERATE HYDROCARBON ACCUMULATION Russian patent published in 2012 - IPC E21B43/16 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of the oil and gas industry and may be used at the final stage of developing massive and bedded-massive accumulations with a cap of large thickness and underlaid with a bottom water actively introducing into a productive part of a reservoir, in particular, to increase a drained area of the bottomhole formation zone - BFZ. The concept of the invention is as follows: the method includes arrangement of a horizontal well, its perforation and formation of cracks with the help of reservoir hydraulic rupturing - RHR, subsequent operation of the horizontal well via cracks of the reservoir rupture. When operating an accumulation with an active bottom water and low oil and gas recovery coefficient in a horizontal well, one or more side shafts are drilled in parallel to the plane of a gas oil of an oil and water contact, where RHR is carried out. At the same time RHR in each interval of the side shaft is carried out from its minimum possible rated value in the farthest section from the horizontal shaft to the maximum possible value in the nearest section. Besides, the maximum rupture pressure is accepted as the value that does not exceed the permissible limit value for breakage of a rock skeleton in the area of this side shaft arrangement. Accumulation operation is carried out with depressions at a reservoir that do not permit tightening of a bottom water.

EFFECT: increased drained area of a productive reservoir BFZ and provision of maximum possible yield of oil or gas from a hydrocarbon accumulation.

1 dwg