OIL RESERVOIR DEVELOPMENT METHOD (VERSIONS)

FIELD: oil-and-gas industry.SUBSTANCE: present invention relates to oil industry, in particular to microbiological methods of oil recovery. The process includes four possible methods forof development of oil reservoir, where in each case the injectivity of the injection well and water salinity are clarified in advance. The first and the second methods comprise depending the well injectivity 100 - 300 m/day and the water salinity 0.15 - 100 g/l or 100-220 g/l, pre-injection of the mixture of hydrogen peroxide in the mineral salt solution in the volume 5-10 mor 10-15 mis performed then the cyclic injecting by alternating fringes is performed in the volume ratio 1: 1 of hydrocarbon oxidizing microorganism in the solution of mineral salts and in the mixture of hydrogen peroxide in the solution of mineral salts, and punching into the reservoir by the water with the salinity 0.15 - 100 g/l or 100-220 g/l in the volume 10-15 mand well shutdown for production seasoning within for 10-12 days. According to the third and the forth methods depending the well injectivity 300 - 500 m/day and the water salinity 0.15 - 100 g/l or 100-220 g/l, pre-injection into the formation of the the water dispersion of wood flour with the concentration ot 0.005 - 1.0 wt.% is performed, then the mix of hydrogen peroxide solution in the mineral salt solution in the volume 5-10 mor 10-15 mis injected, then the cyclic injecting by alternating fringes is performed in the volume ratio 1: 1 of hydrocarbon oxidizing microorganism in the solution of mineral salts and in the mixture of hydrogen peroxide in the solution of mineral salts, and punching into the reservoir by the water with the salinity 0.15 - 100 g/l or 100-220 g/l in the volume 10-15 mand well shutdown for production seasoning for 10-12 days.EFFECT: invention improves the efficiency of microbial stimulation, increases the coverage of the reservoir and minimize the watering.12 cl, 3 tbl Предложенное изобретение относится к нефтедобывающей промышленности, в частности к микробиологическим способам разработки нефтяных пластов. Технический результат заявленного изобретения заключается в повышении эффективности микробиологического воздействия на пласт и увеличения охвата пласта, снижении обводненности. Способ включает четыре варианта разработки нефтяного пласта, где по каждому варианту предварительно уточняют приемистость нагнетательной скважины и минерализацию воды. Первый и второй способ включает в зависимости от приемистости скважины