Deep sea multiphase multistage separation and reinjection system

Abstract

The invention belongs to the field of offshore oil and gas field development, and in particular relates to a deep-sea multiphase and multistage separation reinjection system. Deep-sea multi-phase multi-stage separation and reinjection system includes: overall support structure, vertical separator, gas-liquid cyclone separator, coil liquid-liquid separator, buffer tank and booster reinjection pump, of which: vertical Separator, gas-liquid cyclone separator, coil type liquid-liquid separator, buffer tank and booster recharge pump are located in the overall support structure, vertical separator, gas-liquid cyclone separator, coil type The liquid-liquid separator, buffer tank and booster refill pump are connected in sequence. The oil well production fluid of the present invention is directly subjected to multiphase separation in it, avoiding lifting the water contained in the production fluid to the platform and occupying valuable platform area, which can save a lot of energy for deep sea areas, especially wells with high water cut At the same time, the static pressure of the standpipe and the back pressure of the wellhead are greatly reduced, and the risks of pipeline leakage and deformation are reduced, which is conducive to the stability of production.

Description

technical field [0001] The invention belongs to the field of offshore oil and gas field development, and in particular relates to a deep-sea multiphase and multistage separation reinjection system. Background technique [0002] As the most important energy sources in the world today, oil and natural gas have always been the foundation and strategic position of national development. As the exploration and exploitation of onshore oil resources enters the middle and later stages, offshore oil has gradually become the focus of energy exploration due to its abundant reserves. Some organizations predict that 44% of future oil and gas resources will come from deep-water areas of the ocean. [0003] In the current development stage of offshore oil and gas resources, the oil well output is mainly transported to the offshore platform or shore-based facilities for subsequent processing, which will cause a lot of energy loss and occupy valuable offshore platform area. The static pressu...

AI Technical Summary

Problems solved by technology

[0004] At present, the research time of this technology in foreign countries is still short, and most of them are in the experimental stage, and the efficiency cannot be guaranteed. However, the research on the deep-sea multi-phase separation and reinjection system in my country is in a blank period. Therefore, it is necessary to develop an efficient and reasonable deep-sea multi-phase multi-stage The separated reinjection system can effectively solve the problems faced by offshore oilfield development, and has strong development space and application value

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