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Anti-channeling well cementation resin cement paste and application thereof

A cement slurry and resin technology, which is applied in the field of anti-channeling cementing resin cement slurry, can solve problems such as the adverse effects of fracturing and stratified mining, affecting the production of natural gas wells, and reducing the recovery rate.

Inactive Publication Date: 2018-08-07
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Annulus pressure or downhole interlayer channeling will seriously affect the production of natural gas wells, reduce the recovery rate, and adversely affect the follow-up operations of oil and gas field development, such as fracturing and layered production.

Method used

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  • Anti-channeling well cementation resin cement paste and application thereof
  • Anti-channeling well cementation resin cement paste and application thereof
  • Anti-channeling well cementation resin cement paste and application thereof

Examples

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preparation example Construction

[0033] In the present invention, the preparation method of described water-soluble epoxy resin preferably comprises the following steps:

[0034] (1) Mix propylene oxide butyl ether, butyl acrylate, phloroglucinol and deionized water to carry out polycondensation reaction to obtain an epoxy resin precursor; the temperature of the polycondensation reaction is 80-90° C. The time is 3.5 ~ 4.5h;

[0035] (2) Mix the epoxy resin precursor obtained in the step (1) with an alkaline solution, and react to obtain a reaction feed liquid; the temperature of the reaction is 85 to 90° C., and the reaction time is 2 to 4 hours;

[0036] (3) washing and drying the reaction feed liquid obtained in the step (2) successively to obtain a solid resin;

[0037] (4) mixing the solid resin obtained in the step (3) with an organic solvent to obtain a water-soluble epoxy resin.

[0038] In the present invention, the mass ratio of the propylene oxide butyl ether, butyl acrylate, phloroglucinol and de...

Embodiment 1

[0054] Add 10 parts by weight of propylene oxide butyl ether, 10 parts by weight of butyl acrylate, 35 parts by weight of phloroglucinol, and 25 parts by weight of deionized water into the reactor, react at 80 ° C for 3 hours, and react Cool to 40°C after completion, then add 5 parts by weight of 30wt% sodium hydroxide solution to it, further react at 85°C for 2.5h, wash the obtained material with water after cooling, and then dry at 80°C for 30 minutes to reduce the moisture content. If it is less than 5%, solid resin particles are obtained, and half of the mass of solid resin is added to dissolve in ethanol to obtain liquid epoxy resin.

[0055] The obtained water-soluble epoxy resin has high toughness, and the impact strength reaches 65KJ / m 2 , the strength of the water-soluble epoxy resin after curing reaches 70MPa.

[0056] Preparation of anti-channeling cementing resin cement slurry: based on the weight of 100% G-grade cement, the percentage of each additive to the weig...

Embodiment 2

[0058] Add 20 parts by weight of propylene oxide butyl ether, 10 parts by weight of butyl acrylate, 30 parts by weight of phloroglucinol, and 20 parts by weight of deionized water into the reactor in proportion, and react at 85°C for 3h, and react Cool to 40°C after completion, then add 6 parts by weight of 30wt% sodium hydroxide solution therein, further react for 3h at 80°C, wash the material after cooling, then dry at 80°C for 30 minutes to make the water content less than 5% to obtain solid resin particles, and then add half of the solid resin mass in ethanol to dissolve to obtain liquid epoxy resin.

[0059] The water-soluble epoxy resin has high toughness, and the impact strength reaches 65KJ / m 2 , the maximum strength of the water-soluble epoxy resin after curing can reach 70MPa.

[0060] Preparation of anti-channeling cementing resin cement slurry: based on the weight of 100% G-grade cement, the percentage of each additive in G-grade cement weight is: AMPS and AA copo...

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Abstract

The invention provides an anti-channeling well cementation resin cement paste and application thereof. The anti-channeling well cementation resin cement paste comprises, by mass, 100 parts of G-gradecement, 2-3 parts of filtrate reducer, 0.5-3 parts of resin curing agent, 5-20 parts of resin, 0.5-1 part of dispersant, 0.5-1 part of retarder, 0-40 parts of weighting agent and 35-55 parts of water,wherein rein refers to one or multiple of water-soluble epoxy resin, organic silicon resin and phenolic resin. As the anti-channeling well cementation resin cement paste is added with the resin, toughness and cementing property of cement sheaths can be improved, and further, flow of formation fluid can be prevented effectively, and gas-channeling prevention effect can be improved. According to results of an embodiment of the invention, the viscosity of the anti-channeling well cementation resin cement paste is 190mPa.s, the cement paste has good flowability and its anti-channeling performancereaches up 18-22MPa / m.

Description

technical field [0001] The invention relates to the technical field of well cementing in oil and gas fields, in particular to an anti-channeling well cementing resin cement slurry and its application. Background technique [0002] Cementing operation refers to that during the drilling process of oil and gas exploration and development, the casing is put into the well, and the cement slurry is injected into the annular space between the wellbore and the casing. After the cement slurry returns to a certain height, it will become cement stone. The well wall is consolidated with the casing. Cementing operation is an indispensable and important link in the drilling operation process. [0003] The quality of cementing determines whether the subsequent oil and gas production is smooth and the length of production time. During cementing, the blocking effect of annular cement slurry on fluid and gas in the formation is directly related to whether the cement sheath can effectively s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C09K8/493
CPCC04B28/00C04B2111/00724C04B2201/20C04B2201/50C09K8/493C04B24/163C04B24/121C04B24/30C04B24/003C04B24/281
Inventor 许明标周贤海符合王晓亮
Owner YANGTZE UNIVERSITY
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