Application of physico-chemical methods of increasing oil recovery with joint periodic shutdown of injection wells and changing the operating mode at the producing fund in order to involve non-drained oil reserves in operation

Relevance. The need to increase the efficiency of impact on previously undrained oil reserves by using systemic demand. The principles of integration should be based on a set of measures that are implemented at the facility, taking into account the inadmissibility of increasing their cost with a systemic approach. One of such approaches is the use of physical and chemical impact on the reservoir together with cyclic injection, as well as regulation of the technological modes of operation of the production and injection fund. With a complex impact on the deposit, it is possible to involve previously undrained reserves in operation due to the redistribution of pressures, changing the direction of flows, isolating washed areas. A systemic approach allows to cover 80–90% of the deposit with impact, which is impossible to achieve with the use of point geological and technical measures without a multiple increase in annual planned costs. Aim. Application of complex impact on the reservoir to redistribute pressures, change the direction of flows, isolate washed areas in order to involve previously undrained oil reserves in operation. Methods. Analytical methods, conducting work on a pilot site. Results and conclusions. Work has been carried out for five months at the site of field X. Positive results were obtained: an increase in additional oil production, a decrease in water injection and reduction of produced water. A high value of the net present value for the production of a ton of oil was obtained, as well as savings associated with a decrease in the share of injected and produced water. It is proposed to replicate the method to other objects and deposits in Western Siberia, and impact programs and planned indicators are considered.