OREANDA-NEWS. February 18, 2011. TATNEFT continues to use the proven effective new technologies. Among them there is a system of dual completion and production of two or more layers through one borehole and a dual completion and injection system to maintain reservoir pressure, reported the press-centre of TATNEFT, reported the press-centre of TATNEFT.

Application of dual completion and production installations allows TATNEFT to concurrently produce both horizons with different reservoir characteristics and properties, increase profitability of individual wells operations through involvement of other development targets, or production of formations different in terms of productivity within the same target of development. Application of these installations also allows reducing the drilling volumes through the use of one wellbore and arrangement of simultaneous (concurrent) production of hydrocarbon reserves of various development targets within a single spacing pattern. This technology has already been implemented in 765 producing wells, including 215 wells introduced in 2010.

New for the system of reservoir pressure maintenance is application of dual completion and injection system for concurrent injection. This technology has been implemented at 230 injection wells of the Company. The cumulative additional oil production of the influenced production wells amounted to 402 thousand tons of crude oil. In 2011, the plans provide for increasing the total number of dual completion and production installations by 185 units, while the number of dual completion and injection systems will increase by 78 units.

The Company also continues to introduce the technology of downhole pump-aided dump-flooding, which has been applied for the reservoir pressure maintenance system in 15 individual remote sites of development.

The program of introducing highly reliable packers M1-X for the purpose of protecting the production casing is being actively implemented with the packers installed in 2,569 injection wells. Currently operating packers of various designs have been introduced at 43 percent of the operating injection wells stock.