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Carbon dioxide response type intelligent gel channeling sealing agent and preparation method and application thereof

An intelligent gel sealing agent and intelligent gel sealing technology are applied in the field of wellbore sealing to achieve the effects of low viscosity, strong fluidity and good injectability

Inactive Publication Date: 2020-07-10
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, conventional remedial measures have certain limitations in selectivity, operability, applicability, and economy.

Method used

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  • Carbon dioxide response type intelligent gel channeling sealing agent and preparation method and application thereof

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Embodiment 1

[0031] This embodiment provides a CO 2 Responsive smart gel channeling agent, which is prepared through the following steps:

[0032] Dissolve polyacrylamide, xanthan gum, and cationic starch with a degree of hydrolysis of 30% in deionized water to form three solutions with a weight concentration of 0.5%, 0.5%, and 0.5%, respectively. Take a certain amount of each solution and place it in the reaction Stir uniformly in the device, and simultaneously feed nitrogen into the system to remove oxygen for 30 minutes. While stirring, slowly add aluminum citrate and nanoclay with a mass concentration of 1.5% to the system successively (3 drops / second), and then Stir for more than 120 minutes, put the reactor into a 60°C constant temperature water bath, pass nitrogen into the reactor to remove oxygen, and when the temperature of the aqueous solution in the reactor reaches 60°C, continue to stir for more than 120 minutes to obtain a water-soluble sol.

[0033] Continuously inject CO in...

Embodiment 2

[0040] This embodiment provides a CO 2Responsive smart gel channeling agent, which is prepared through the following steps:

[0041] Dissolve polyacrylamide, xanthan gum, and cationic starch with a degree of hydrolysis of 30% in deionized water to form three solutions with a mass concentration of 1.5%, 1.5%, and 1.5%, and each take a certain amount of solution and place it in the reactor Stir uniformly inside the system, and at the same time pass nitrogen to the system to remove oxygen for 30 minutes. While stirring, slowly add aluminum citrate and nanoclay with a mass concentration of 1.5% respectively (4 drops / second) into the system successively, and then stir After more than 120 minutes, put the reactor into a constant temperature water bath at 60°C, pass nitrogen into the reactor to remove oxygen, and when the temperature of the aqueous solution in the reactor reaches 60°C, continue to stir for more than 120 minutes to obtain a water-soluble sol. Continuously inject CO i...

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Abstract

The invention provides a carbon dioxide response type intelligent gel channeling sealing agent and a preparation method and application thereof. The channeling sealing agent is prepared from the following raw materials in parts by weight: 0.5 to 10 parts of a component A, 0.5 to 5 parts of a CO2 stimulation response component, 0.5 to 5 parts of a reinforcing agent and 0.5 to 5 parts of a cross-linking agent, wherein the component A is partially hydrolyzed polyacrylamide and / or xanthan gum. The invention also provides a preparation method of the channeling sealing agent. The channeling sealingagent can be used for effectively sealing carbon dioxide in a shaft.

Description

technical field [0001] The present invention relates to a channel blocking agent, in particular to a CO 2 A responsive intelligent gel channel sealing agent belongs to the technical field of wellbore channel sealing. Background technique [0002] CO 2 Capture, utilization and storage (CCUS) is an emerging technology that is expected to realize the low-carbon utilization of fossil energy, and it is currently the only feasible measure that can reduce greenhouse gas emissions on a large scale and slow down global warming. From a technical perspective, although CO 2 The technology of capture and geological storage has become mature, but the main reason that restricts its large-scale promotion and application is the safety of storage. Therefore, how to effectively prevent and control gas leakage and ensure the safety of storage is an important issue in the research of CCUS technology. content. [0003] CO 2 Potential leakage is mainly caused by the failure and incompleteness...

Claims

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Application Information

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IPC IPC(8): C09K8/44E21B33/13
CPCC09K8/44E21B33/13
Inventor 刘琦赵莉杨磊磊彭勃张声威李林坤贾冀辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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