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Deep sea parallel multiphase multistage separation reinjection system

A technology of multi-phase separation and parallel connection, which is applied in the direction of production fluid, wellbore/well parts, earthwork drilling and production, etc., can solve problems in deep water field, reduce standpipe static pressure and wellhead back pressure, save energy, reduce small length effect

Active Publication Date: 2019-12-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the current subsea oil-gas-water three-phase separation technology has been successfully applied in conventional deep water environments, it still faces huge problems in the deep water field

Method used

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  • Deep sea parallel multiphase multistage separation reinjection system
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  • Deep sea parallel multiphase multistage separation reinjection system

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Embodiment Construction

[0026] like figure 1 As shown, the deep-sea parallel multi-stage multi-phase separation and reinjection system includes: base platform 2, vertical parallel separator 4, horizontal gravity separator 5, buffer tank 6, boosted reinjection pump 7 and boosted reinjection pump 8; where: vertical parallel separator 4, horizontal gravity separator 5, buffer tank 6, booster reinjection pump 7 and booster return pump 8 are fixed on the base platform 2; vertical parallel separator 4 is set The mixture inlet 401, the liquid outlet 406 of the vertical gravity separator, the gas outlet 407 of the vertical gravity separator, the delivery pipeline of the subsea oil tree is connected with the mixture inlet 401 of the vertical parallel separator 4, and the produced liquid is discharged from the mixture inlet 401 Send to the deep sea parallel multi-stage multi-phase separation and reinjection system; the horizontal gravity separator 5 is equipped with a horizontal gravity separator inlet 501, a ...

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Abstract

The invention relates to a deep sea parallel multiphase multistage separation reinjection system. The deep sea parallel multiphase multistage separation reinjection system comprises a base platform, avertical parallel separator, a horizontal gravity separator, a buffer tank, a pressurized reinjection pump and a pressurized reinfusion pump, wherein the vertical parallel separator, the horizontal gravity separator, the buffer tank, the pressurized reinjection pump and the pressurized reinfusion pump are fixedly arranged on the base platform; a delivery line of an undersea christmas tree is connected with a mixture inlet of the vertical parallel separator; produced liquid is fed into the deep sea parallel multiphase multistage separation reinjection system from the mixture inlet; a horizontal gravity separator inlet is connected with a vertical gravity separator liquid outlet; a horizontal gravity separator oil phase outlet is connected with a delivery line two-way pressurized reinfusionpump; and oil is delivered to an offshore platform for processing through an oil passage. The deep sea parallel multiphase multistage separation reinjection system is arranged on deep-sea underwaterand directly separates produced liquid of an oil well in close distance without first lifting, so that great area of the offshore platform is prevented from being occupied and the stabilization of production is facilitated.

Description

technical field [0001] The invention belongs to the field of deep-sea oil and gas field development, and in particular relates to a deep-sea parallel multi-phase multi-stage separation reinjection system. Background technique [0002] As the most important strategic material in the world today, petroleum occupies a very important position in every country in the world. affect economic and political development. With the deepening of the exploitation of various oilfields, onshore oilfields have entered the middle and late stages of exploitation, and the center of gravity of exploitation has gradually extended to the ocean with abundant reserves. According to relevant statistics, the oil and gas resources in the South China Sea alone are equivalent to one-third of China's total oil and gas resources. In recent years, my country has been strengthening the research on deep-sea oilfield drilling, which also indicates that future oil and gas production will largely depend on dee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/40E21B43/36
CPCE21B43/36E21B43/40
Inventor 张黎明赵崯橙王塞塞张凯
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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