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Liquid temporary plugging agent for rubber plugs, and preparation method thereof

A technology for temporary plugging agent and rubber stopper, which is applied in the field of liquid rubber stopper temporary plugging agent and its preparation, can solve problems such as insufficient glue-forming performance, and achieve the effects of high pressure bearing, simple and easy operation in the preparation process, and good pumping performance.

Inactive Publication Date: 2019-10-15
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiment of the present application is to provide a liquid rubber plug temporary plugging agent and its preparation method, which aims to improve the problem of insufficient gelation performance of the existing liquid rubber plug temporary plugging agent under medium and low temperature conditions

Method used

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  • Liquid temporary plugging agent for rubber plugs, and preparation method thereof
  • Liquid temporary plugging agent for rubber plugs, and preparation method thereof
  • Liquid temporary plugging agent for rubber plugs, and preparation method thereof

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preparation example Construction

[0057] The present application also provides a preparation method of the above-mentioned temporary plugging agent for liquid rubber plugs, which mainly includes:

[0058] Mix the raw materials of the liquid rubber stopper temporary plugging agent.

[0059] The preparation method of the liquid rubber stopper temporary plugging agent is relatively simple, and the operation is relatively easy.

[0060] Further, in order to make the cross-linking reaction more uniform and the gel strength of the whole system as consistent as possible, in some embodiments of the present application, the monomer, inorganic aggregate and water are mixed first, and then mixed with the initiator, cross-linking agent, Additives are mixed, and the system obtained by the cross-linking reaction is more uniform, and the problem of too fast or too slow part of the gel reaction caused by inhomogeneity is avoided as much as possible.

[0061] The application also provides a temporary plugging agent for liquid...

Embodiment 1

[0071] The present embodiment provides a temporary plugging agent for liquid rubber plug; the temporary plugging agent for liquid rubber plug includes the following components in terms of mass percentage:

[0072] 18% acrylamide, 0.05% N,N'-methylenebisacrylamide, 0.2% ammonium persulfate, 4% nano-silica, 0.02% thiourea, unavoidable impurities and the rest of water, the total volume of the system for 100ml.

Embodiment 2

[0074] The present embodiment provides a temporary plugging agent for liquid rubber plug; the temporary plugging agent for liquid rubber plug includes the following components in terms of mass percentage:

[0075] 18% acrylamide, 0.05% crosslinking agent 1, 0.2% initiator ammonium persulfate, 1% nano silicon dioxide, 0.02% thiourea, unavoidable impurities and the rest of water, the total volume of the system is 100ml.

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Abstract

The invention relates to the field of oil and gas chemical industry, and concretely relates to a liquid temporary plugging agent for rubber plugs, and a preparation method thereof. The raw materials of the liquid temporary plugging agent for rubber plugs mainly include, by mass, 10-25% of a monomer, 0.05-0.5% of a crosslinking agent, 0.1-0.5% of an initiator 1-5% of inorganic aggregates and 0.01-0.1% of an additive, wherein the additive comprises at least one of ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, thiourea and sodium citrate. At least one of ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, thiourea and sodium citrate is combined with the monomer, the crosslinking agent, the initiator and the inorganic aggregates to make the liquid temporary plugging agent for rubber plugs have the advantages of fast gel formation and high strength. The liquid temporary plugging agent can fast form a gel at a low oil reservoir temperature, and hasstable gel properties.

Description

technical field [0001] The present application relates to the field of oil and gas chemical industry, in particular to a liquid rubber stopper temporary plugging agent and a preparation method thereof. Background technique [0002] For well completion and workover in formations with low pressure or fractures and karst caves that are easy to leak, there is often a serious problem of wellbore working fluid loss. At present, the cross-linked polymer gel system is widely used at home and abroad for the prevention and plugging of well completion and workover, which can form gel quickly at high temperature and easily achieve high strength; Under certain conditions, there is a risk of leaking into the formation and failing to gel. Contents of the invention [0003] The purpose of the embodiments of the present application is to provide a liquid temporary plugging agent and a preparation method thereof, which aims to improve the problem of insufficient gel forming performance of ...

Claims

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Application Information

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IPC IPC(8): C09K8/512C08F220/56C08F222/38C08F120/38
CPCC08F120/38C08F220/56C09K8/5083C09K8/512C08F222/385
Inventor 贾虎杨欣雨李三喜冯大龙葛俊瑞李艳飞
Owner SOUTHWEST PETROLEUM UNIV
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