RU95108732A - Method for development of oil deposit - Google Patents

Abstract

FIELD: oil production industry. SUBSTANCE: this can be used in development of structurally complex oil deposit. According to method, oil is taken through producing wells, some producing wells are converted into injection wells, and working agent is pumped in through injection wells. Separated in deposit are developing sections limited by lowered sections of reservoir saturated with water. Determined in developing sections is direction of natural fussuring caused by vertical fractures. Oil is taken through producing wells until reservoir pressure reaches 0.50-0.65 of initial reservoir pressure value. Up to 20% of producing wells are converted into injection wells. Formed are rows of injection wells perpendicularly to direction of natural fissuring. For conversion into injection wells, selected are those producing wells which are perforated in zone of higher permeability of oil-bearing stratum, or wells are additionally perforated in zone of higher permeability or in water-bearing zone. Used as working agent is Tournaisian brine water with density of 1.14-1.15 g/cm3. Working agent is pumped in cyclic operation alternately 10-20 days into injection wells in one developing section, 10-20 days into injection wells in other section of development. EFFECT: high efficiency.

Claims (1)

The invention relates to the oil industry and may find application in the development of complex oil deposits. In the method of developing an oil deposit, oil is taken through production wells, part of the production wells are transferred to injection wells, and a working agent is pumped through injection wells. Deposits are identified in the development areas limited by lowered sections of the formation saturated with water. At the development sites, the direction of natural fracturing formed by vertical fractures is determined, oil is taken through production wells until formation pressure of 0.50 - 0.65 from the initial formation pressure is reached, and up to 20% of the production well fund is transferred to injection wells. Rows of injection wells are formed perpendicular to the direction of natural fracture, while production wells with perforation in the zone of increased permeability of the oil reservoir are selected for translation or wells are additionally perforated in the zone of increased permeability or in the aquifer. As a working agent used Tournaisian produced water with a density of 1.14 - 1.15 g / cm ³ . The injection of the working agent is carried out cyclically alternately 10 to 20 days. to injection wells of one development site, 10 to 20 days. into injection wells of another development site.