Flexible particle diverter and preparation method thereof

A technology of flexible particles and diverting agents, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high toxicity, high particle hardness, and large damage to the wellbore wall, and achieve the effect of long stabilization time.

Active Publication Date: 2014-04-30
北京国海能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing diverting agent has the advantages of convenient construction, deep reservoir depth and good dynamic sweep effect; but at the same time, it has the following defects: 1. The particle hardness is large, which is harmful to the wellbore wall; 2. The sealing effect for narrow and small fractures is poor, 3. High toxicity; 4. Poor temperature resistance, mineralization resistance and shear resistance

Method used

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  • Flexible particle diverter and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0052] A flexible particle diverting agent, which comprises the following raw materials formulated in parts by weight: 30 parts of polyacrylate liquid rubber, 100 parts of bisphenol A epoxy resin, 0.05 parts of peroxide initiator and epoxy resin 0.5 parts of curing agent; the polyacrylate liquid rubber includes the following raw materials according to the preparation: n-butanol, butyl acrylate, ethyl acrylate, glycidyl acrylate, azobisisobutyronitrile and nitrogen; the peroxide The compound initiator is benzoyl peroxide; the epoxy resin curing agent is polysebacic anhydride. The polyacrylate liquid rubber comprises the following raw materials formulated in parts by weight: 20 parts of n-butanol, 5 parts of butyl acrylate, 5 parts of ethyl acrylate, 2.5 parts of glycidyl acrylate, 0.01 parts of azobisisobutyronitrile parts and 20 parts of nitrogen. The preparation method comprises the following steps:

[0053] 1. Put butyl acrylate, ethyl acrylate and glycidyl acrylate into n...

Embodiment 2

[0061] A flexible particle diverting agent, which comprises the following raw materials formulated in parts by weight: 5 parts of polyacrylate liquid rubber, 110 parts of bisphenol A type epoxy resin, 0.08 parts of peroxide initiator and epoxy resin 1.3 parts of curing agent; the polyacrylate liquid rubber comprises the following raw materials according to the preparation: n-butanol, butyl acrylate, ethyl acrylate, glycidyl acrylate, azobisisobutyronitrile and nitrogen; the peroxide The compound initiator is tert-butyl peroxybenzoate; the epoxy resin curing agent is polyazelaic anhydride. The polyacrylate liquid rubber comprises the following raw materials formulated in parts by weight: 20 parts of n-butanol, 5 parts of butyl acrylate, 5 parts of ethyl acrylate, 2.5 parts of glycidyl acrylate, 0.01 parts of azobisisobutyronitrile parts and 20 parts of nitrogen. The preparation method comprises the following steps:

[0062] 1. Put butyl acrylate, ethyl acrylate and glycidyl a...

Embodiment 3

[0070] A flexible particle diverting agent, which comprises the following raw materials formulated in parts by weight: 40 parts of polyacrylate liquid rubber, 120 parts of bisphenol A type epoxy resin, 0.1 part of peroxide initiator and epoxy resin 2 parts of curing agent; the polyacrylate liquid rubber includes the following raw materials according to the preparation: n-butanol, butyl acrylate, ethyl acrylate, glycidyl acrylate, azobisisobutyronitrile and nitrogen; the peroxide The compound initiator is benzoyl peroxide; the epoxy resin curing agent is maleic anhydride. The polyacrylate liquid rubber comprises the following raw materials formulated in parts by weight: 20 parts of n-butanol, 5 parts of butyl acrylate, 5 parts of ethyl acrylate, 2.5 parts of glycidyl acrylate, 0.01 parts of azobisisobutyronitrile parts and 20 parts of nitrogen. The preparation method comprises the following steps:

[0071] 1. Put butyl acrylate, ethyl acrylate and glycidyl acrylate into n-but...

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Abstract

The invention belongs to a flexible particle diverter and a preparation method thereof. The diverter is prepared from the following raw materials in parts by weight: 30-40 parts of polyacrylate liquid rubber, 100-120 parts of bisphenol A epoxy resin, 0.05-0.1 part of a peroxide initiator and 0.5-2 parts of an epoxy resin curing agent, wherein the polyacrylate liquid rubber is prepared from the following raw materials: n-butyl alcohol, butyl acrylate, ethyl acrylate, glycidyl acrylate, azodiisobutyronitrile and nitrogen; the peroxide initiator is either benzoyl peroxide or tert-butyl peroxybenzoate; the epoxy resin curing agent is one of polysebacic polyanhydride, polyazelaic polyanhydride, maleic anhydride and tung oil anhydride. The flexible particle diverter, which has flexible particles, has the advantages of no toxicity, good plugging effect on narrow cracks, temperature resistant, mineralization resistant and excellent in shearing resistance.

Description

technical field [0001] The invention belongs to the technical field of oil field chemical industry, and in particular relates to a flexible particle diverting agent and a preparation method thereof. Background technique [0002] Refracturing, as a technical measure for the comprehensive management of old oil and water wells (oil wells and water injection wells), is a major problem that oilfields face urgently to be solved. According to research and experiments at home and abroad, appropriate refracturing for such old wells can continue to achieve a relatively large increase in production or injection. [0003] Extending the original fractures is a common concept of refracturing before, but this kind of refracturing has a short period of stable production after fracturing, and the effect of increasing production is not ideal; The increase is restricted by many factors and cannot be increased without limit, so the effect of refracturing carried out under this guiding ideology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C08F220/18C08F220/32C08J3/24
CPCC08F220/18C08F220/1804C09K8/5083C08F220/325
Inventor 张春雨张聪忠
Owner 北京国海能源技术研究院
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