MODERNIZATION OF BUSHES OF WELLS ON THE LATE STAGE OF DEVELOPMENT

Abstract

Many oil deposits of Russia quickly become mature production fields having an adverse effect on the economic feasibility of their development. This fact makes the oil companies improve methods and recovery techniques of these fields to lower the costs of oil reservoir engineering. Large oil companies apply for well clusters modernization to decrease well service costs. With time the extracted oil becomes more and more viscous therefore there is a problem of decreasing this viscosity. The article considers the transition from the scheme of one-line crude oil gathering system to separate gathering. The modernized cluster has a special water feed station providing a decrease in oil viscosity up to the values comparable to water viscosity by injecting purified and treated water from water-injection pumping station. The price of the equipment after modernization is more expensive due to a large number of expensive motor operated valves, but it is justified by metering units’ maintenance with non-stop production. Also, the maintainability of the equipment is improved, because the most of the installations are on the surface now. The repair teams do not need to remove faulty items from the ground for troubleshooting. The corrosion protection of the equipment is also improved because the modernized cluster is supplied by inhibiting corrosion protection of pipelines made by chemical injection skid. Thus, the optimization of oil and gas well clusters organization could become an expensive enterprise, but it is quite justified as in the long term it is favourable.