Water-gas separation technology for production and injection in same well through electric submersible pump

Abstract

The invention discloses a water-gas separation technology for production and injection in the same well through an electric submersible pump. The water-gas separation technology includes an electric submersible pump unit, a gas-liquid separation guiding device, a gas-liquid diversion device, a gas-liquid channel and a packer layered sealing system, the packer layered sealing system is composed ofa first packer, a second packer and a screen pipe, and the first packer is located on the upper part of the second packer; and the gas-liquid diversion device is located between the first packer and the second packer. According to the water-gas separation technology for production and injection in the same well through the electric submersible pump, the advantages of wide displacement range and high delivery head of the electric submersible pump are used, well fluid is subjected to water-gas separation coordinated with a gas-liquid separator, separated gas continues up along a casing pipe anddischarges from a wellhead through an oil pipe or the casing pipe, and separated water is pressurized by a centrifugal pump and injected into an injection layer; and wide application fields are achieved, the current vigorously advocated requirements for building a resource-conserving and environment-friendly society are met, a good technology for drainage and gas production fields is provided, themarket demands are met, and the bright prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of separation of water and gas in the same well production and injection, in particular to a technology for separating water and gas in the same well production and injection using a submersible electric pump. Background technique [0002] During the production process of gas wells, it is easy to produce gas and water simultaneously. The water production of gas wells will cause liquid accumulation in gas wells, which will seriously damage the production of gas wells, and eventually cause gas wells to stop production due to water flooding. Currently, drainage gas production is commonly used The lifting system is to discharge the separated liquid to the ground, but the water (well fluid) cannot be effectively used, or even discharged randomly, which pollutes the environment and does not meet the current requirements of building a resource-saving and environment-friendly society. . Moreover, the current liftin...

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Problems solved by technology

[0002] During the production process of gas wells, it is easy to produce gas and water simultaneously. The water production of gas wells will cause liquid accumulation in gas wells, which will seriously damage the production of gas wells, and eventually cause gas wells to stop production due to water flooding. Currently, drainage gas production is commonly used The lifting system is to discharge the separated liquid to the ground, but the water (well fluid) cannot be effectively used, or even discharged randomly, which pollutes the environment and does not meet the current requirements of building a resource-saving and environment-friendly society.

Moreover, the current lifting system for drainage and gas production cannot meet the requirements of "zero" emission for production and injection in the same well

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