High-temperature reservoir chemical flooding airtight polymer preparation device

A chemical flooding, high-temperature oil technology, applied in the production of fluids, wellbore/well components, earthwork drilling, etc., can solve the problem of high dissolved oxygen concentration, and achieve the effect of avoiding thermal oxygen degradation and reducing dissolved oxygen content

Active Publication Date: 2015-04-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-temperature oil reservoir chemical flooding airtight compounding device to solve the problem of high dissolved oxygen concentration in the polymer solution obtained from the existing open hydraulic jet compounding device

Method used

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  • High-temperature reservoir chemical flooding airtight polymer preparation device

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Embodiment 1

[0022] The high-temperature oil reservoir chemical flooding airtight compounding device of this embodiment, such as figure 1 As shown, it includes a dry powder storage tank 3, a screw feeder 4, a water supply system, a hopper 5, an ejector 6 and a curing tank 7; the dry powder storage tank 3 is a closed polymer dry powder storage tank, and the screw feeder 4 It is a closed frequency conversion screw feeder, the ejector 6 is a plug-in Venturi ejector, the aging tank 7 is a dynamic sealing stirring and dissolving aging tank, and an agitator 33 is installed in the aging tank 7; the receiving hopper 5 is a closed container, The inlet and outlet of the screw feeder 4 are located inside the receiving hopper 5;

[0023] The feeding port of the dry powder storage tank 3 is connected with the inlet of the screw feeder 4 through a pipeline, and the pipeline is provided with a storage tank outlet valve 26; the outlet of the screw feeder 4 is connected with the inner cavity of the receivi...

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Abstract

The invention discloses a high-temperature reservoir chemical flooding airtight polymer preparation device. The high-temperature reservoir chemical flooding airtight polymer preparation device comprises a dry powder storage tank, a screw feeder, a receiving hopper, a jet device, a curing tank and a water supply system; the water supply system is communicated with the water inlet of the jet device; the dry powder storage tank, the screw feeder, the receiving hopper, the jet device and the curing tank are orderly communicated with each other to form an airtight polymer preparation system; the high-temperature reservoir chemical flooding airtight polymer preparation device further comprises a nitrogen supply system which is communicated with the dry powder storage tank, the receiving hopper and the curing tank by use of a nitrogen supply pipeline, respectively; a nitrogen sealing pressure control system is arranged on the nitrogen supply pipeline. The high-temperature reservoir chemical flooding airtight polymer preparation device is capable of preparing polymers under the working condition of nitrogen isolated from oxygen, and therefore, the nitrogen airtight preparation of a polymer solution is realized, the content of dissolved oxygen in the polymer solution is greatly reduced, the problem of relatively high oxygen concentration in the polymer solution obtained by use of an open hydraulic jet flow polymer preparation device is solved and the requirement indexes of high-temperature reservoir chemical flooding on the oxygen content of the polymer solution are satisfied.

Description

technical field [0001] The invention belongs to the technical field of oilfield surface coordination and polymerization, and in particular relates to a closed polymerization device for chemical flooding of high-temperature oil reservoirs. Background technique [0002] Research and application of chemical flooding technologies such as polymer flooding, polymer weak gel control flooding, polymer and surfactant and alkali, polymer and surfactant composite flooding at home and abroad to improve oilfield ultimate recovery It has been quite extensive and in-depth, but the research and application of chemical flooding technology for high temperature reservoirs above 80 °C has not yet broken through. Among them, the key issue in the preparation of the polymer solution in the injected flooding agent system is to prevent the chemical degradation of the polymer and reduce the viscosity during the preparation process. The chemical degradation of polymers refers to the occurrence of red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 刘家恒高景德李涛方云安发全刘元宝余江南
Owner CHINA PETROLEUM & CHEM CORP
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