METHOD OF DEVELOPING NONUNIFORM OIL FORMATION Russian patent published in 2000 - IPC

FIELD: oil-producing industry, particularly, methods of development of oil fields. SUBSTANCE: fluid is withdrawn through producing wells and displacement agent is injected through injection wells. Bottom-hole formation zones of producing and ejection wells are periodically treated with cross-linked polymers. First, bottom-hole formation zones of all injection wells are treated. After reduction of water encroachment of neighboring producing wells by 5-10%, bottom-hole formation zones of these wells are treated with cross-linked polymers. Then periodic shutdown and renewal of operation of injection wells are accomplished with half-cycle calculated by piezoconductivity of formation and distance between wells. EFFECT: higher efficiency due to increased sweep of formation and operation of low-permeable interlayers.