METHOD OF CONTROLLING DEVELOPMENT OF NONUNIFORM OIL FORMATION Russian patent published in 2007 - IPC E21B43/22 

FIELD: oil and gas production.

SUBSTANCE: invention relates to methods for developing permeability-nonuniform formations. In a method of controlling development of nonuniform oil formation comprising consecutively alternating injection of insulating composition, working substance, and water into formation, consecutively alternating injection is effected through injecting and producing wells supplemented by 24-h ageing performed after injection of insulating composition, said working substance and water utilized being a system formed by adding 0.5 to 99% of all-purpose reagent used in oil production (RDN-U) to fresh, waste, or formation water, and said insulating composition being a grouting composition based on cement materials or organosilicon compounds, or aqueous solution of polyacrylamide and chromium-containing crosslinking agent, or solution of alkali metal silicate and activator, or oil-in-water emulsion.

EFFECT: increased development efficiency due to increased coverage of formation by isolating high-permeability portions of formation both from withdrawal side and from injection side and due to more complete displacement of oil from low-permeability formations.

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