METHOD OF DEVELOPMENT OF GAS CONDENSATE-OIL DEPOSIT Russian patent published in 2001 - IPC

FIELD: development of hydrocarbon deposits complicated with presence of zones with different rock permeabilities. SUBSTANCE: method includes tapping of producing section with central vertical and peripheral inclined wells. They have parts located within continuous formation along its strike. Wells are to be perforated. Producing section is tapped by wells according to regular geometric pattern and from one derrick substructure. Peripheral inclined wells are drilled at preset zenith angle. It provides for getting of bottom-hole to designed depth in foot of continuous producing formation to corners of regular hexagon. In three wells located through 120 deg along occurrence of continuous formation, in direction of its maximum saturation with hydrocarbons, gently sloping areas are drilled with wells from roof to foot of formation, and they are provided with strainers. Perforation of wells is made in two stages. At the first stage, subject to perforation are intervals in all wells in zone of discontinuous formations. At the second stage, continuous formations in vertical well and in inclined wells having no sloping areas are perforated. EFFECT: increased well production rate and hydrocarbon recovery factor from producing formation, reduced expenditures for well drilling and for field equipment. 5 dwg