METHOD FOR DEVELOPMENT OF HIGH DEPOSITS OF HIGH VISCOSITY OIL WITH WATER CONSISTENT ZONES Russian patent published in 2018 - IPC E21B43/24 E21B7/04 E21B33/138 E21B47/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry. Method of developing a reservoir of high-viscosity oil with water-saturated zones includes the construction of horizontal production and higher injection wells with the installation of casing strings, injection of a displacing agent with a specific gravity below the specific gravity of the formation water into the injection well and the selection of products from the production well, carrying out of researches for definition of the water-saturated zones adjoining a producing chink, after that, in the casing adjacent to the water-bearing zones of this well, they consistently overlap these zones by filling from the face to the mouth with a waterproofing composition that breaks down under a certain influence, followed by technological aging. Prior to the research, the heat carrier in the form of a vapor with a temperature of not less than 180 °C is pumped into both wells until a steam chamber is formed. Geophysical studies are conducted before the selection of products in the form of removing the thermogram along the wellbore of the producing well to determine at least one water-saturated zone with a lowered warm-up temperature. After that, a heat-resistant water-insulating compound that is destroyed under the influence of hydrochloric acid is pumped closer to at least 10 m to the mouth of the identified zones. In operation after the establishment of a stable thermohydrodynamic connection between the wells, characterized by an increase in the temperature of the produced liquid, as well as by increasing the thermogram along the wellbore, the waterproofing composition is destroyed by the action of hydrochloric acid, after which the production well is again operated in the selection mode.

EFFECT: expansion of functionality due to the stability of the waterproofing composition when exposed to it for a long time at high temperatures of not less than 180 °C, the elimination of self-destruction of the waterproofing composition before the creation of a stable thermohydrodynamic connection between the wells, increasing the efficiency of submersible well pumps by eliminating the entry of waterproofing to the pump inlet while reducing material costs.

1 cl, 2 dwg, 1 ex