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Plugging resin system and application thereof

A system and resin technology, applied in chemical instruments and methods, drilling composition, etc., can solve problems such as poor effect

Inactive Publication Date: 2020-10-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the drilling speed can only be improved through optimization techniques such as large displacement, high drilling speed, and low drilling pressure, but the effect is slightly poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a plugging resin system, which is obtained by reacting component A and component B, the mass ratio of component A to component B is 1:1-3:2, and component A is at least An epoxy resin is included, and the B component includes at least an epoxy resin curing agent.

[0035] The plugging resin system of the present invention is that the epoxy resin and the curing agent are mixed and stirred in different proportions, and then pumped into the leakage section of the casing, and the resin and the curing agent undergo addition polymerization reaction within a specified time and under appropriate formation temperature conditions. A cured product with a network structure is generated to achieve the purpose of plugging.

Embodiment 2

[0037] On the basis of Example 1, this example provides a plugging resin system, the A component includes the following substances in parts by mass:

[0038] 100 parts of epoxy resin, 24-40 parts of diluent and 1-3 parts of defoamer.

[0039] The epoxy equivalent of component A is 210-260g / eq. In this embodiment, the defoamer is a polyether-modified polysiloxane defoamer, and the manufacturer is Xiamen Rickman Chemical Technology Co., Ltd.

[0040] Component A is light yellow liquid, soluble in ethanol, acetone, ether, benzene and dilute lye, slightly soluble in carbon tetrachloride, almost insoluble in water. It can be replaced with water when the leak is plugged.

Embodiment 3

[0042] On the basis of Example 1, this example provides a resin system for plugging, and the B component includes the following substances in parts by mass:

[0043] 10-15 parts of amide imidazoline, 18-33 parts of epoxy resin curing agent, 5-10 parts of amino-terminated nitrile rubber.

[0044] B component is a dark red liquid. When in use, mix and stir components A and B evenly. The plugging resin system introduces hydrophobic functional groups into the cationic single molecular chain and changes the molecular structure. After polymerization, a high-strength network solid structure is formed. The gelling time can be determined by The amount of component A and component B is controlled.

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PUM

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Abstract

The invention provides a plugging resin system and application thereof. The plugging resin system is obtained by a reaction of a component A and a component B, the mass ratio of the component A to thecomponent B is 1: 1 to 3: 2, the component A at least comprises epoxy resin, and the component B at least comprises an epoxy resin curing agent. Epoxy resin and a curing agent are mixed and stirred according to different proportions, the mixture is pumped into a casing leakage breaking section, the resin and the curing agent are subjected to addition polymerization reaction within specified timeand under the condition of proper formation temperature to generate a cured product of a net structure, and the purpose of plugging is achieved. And the gelling time can be controlled by the dosages of the components A and B. The compressive strength is greater than 80 MPa, and the chemical plugging construction requirements of the casing damage well are met. According to the plugging resin system, the compressive strength is met, meanwhile, the resin hardness is reduced, the resin toughness is improved, and the resin drillability is improved. And the plug drilling speed can reach 2.5 m / h under the same condition of the plug drilling process, so that the plug drilling time is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of petroleum development, and in particular relates to a plugging resin system and its application. Background technique [0002] For wells with casing damage such as casing leakage and casing transformation in oil fields, chemical plugging is required for casing damage wells. However, since oil and water often coexist in the wellbore, the produced fluid has high salinity and many corrosive media (such as carbon dioxide, hydrogen sulfide, bacteria), so governance is complex. [0003] Chemical plugging of casing damaged wells is a technological measure that injects chemical plugging agent into the leakage section of the casing to form a high-strength, micro-expandable plugging layer, which solidifies to form a high-strength solidified body, and finally reaches the damaged part of the plugging pipe. Chemical plugging agents mainly include conventional inorganic cementitious materials (oil well cement) and the...

Claims

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Application Information

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IPC IPC(8): C09K8/42C08G59/50
CPCC09K8/426C08G59/5033C08G59/504C08G59/5026
Inventor 卢文伟李琼玮郭钢何淼孙雨来周佩付彩利姜毅程碧海刘宁
Owner PETROCHINA CO LTD
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