METHOD OF OIL-POOL DEVELOPMENT Russian patent published in 2008 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to development of oil-pools related to surface doming, and can be used at a final stage of oil pools operation. This invention facilitates reduction of material and financial costs with the implementation of this method and facilitates increased efficiency of oil-pool development. The essence of the invention is as follows: the method includes boring of pressure and producing wells. After that pumping of a working agent into pressure wells and oil extraction out of producing wells are performed. When reserves of oil in a payout bed are exhausted, the sections of surface doming are selected; at that these sections exceed absolute marks of a payout bed; then the boundaries of residual oil are determined in them and additional wells are located on the sections of surface doming, allowing irregularity of planned network uniformity. Further side bores are made in the additional wells in the direction of tops of surface doming and this section of the payout bed is exposed. At that, boring of the side bores in the payout bed is carried out from its water bearing part. After that the wells with the side bores are used as producing wells up to reduction of oil yield below its economically feasible value. The side bores, located in water bearing part of the bed, are exposed at a length from the boundary of residual oil, which is determined on analytic form. Then the wells with side bores are transferred into pressure wells. Besides, the side bores or their part are executed as branch bores within the boundaries of surface doming.

EFFECT: implementation of this method reduces material and financial costs and increases efficiency of oil-pool development.

2 cl, 1 dwg