Barrier water flooding
BARRIER WATER FLOODING (EN: barrier flooding, barrier water-flood operation; DE: Barrieren-Wasserfluten, Barrieren-Wassereinpressen, -Wassereinpumpen; FR: noyage à l'aide d'un barrage; ES: barrera para conseguir inundacion; RU: барьерное заводнение) is the method for the development of the petroleum-gas reservoirs, which is based on the pumping of the water into the gas-petroleum contact through the water injection drilled wells, which are usually situated on the line of the internal contour of the gas-bearing capacity.
The barrier water flooding is purposed for the creation of the water barrier, which is separating mainly the reserves of the petroleum within the petroleum fringe, and of the gas within the gas cap, thus preventing the breach of the gas into the petroleum drilled wells, and the intrusion of the petroleum into the gas cap. The barrier water flooding permits to accelerate the tempos of the extraction of the petroleum, and to increase the coefficient of the petroleum recovery. The usage of the barrier water flooding is most effective at the petroleum-gas reservoirs of the tabular type with the wing-type petroleum fringes, narrow under-gas zones, and large gas caps.
The major advantage of the barrier water flooding is the possibility of the simultaneous development of the reserves of the petroleum and independent gas. The disadvantage of the barrier water flooding is the pinching of the significant quantity of the gas during its displacement by the water. The barrier water flooding is sometimes used in combination with the external and other types of the water flooding.
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