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Elastic modified resin for oil well cement and preparation method and application thereof

A technology for modifying resin and oil well cement, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of complex application environment of oil well cement, inability to use resin for cementing, high temperature and high pressure, etc., and achieve thickening time Adjustable, low cost, lowering the effect of elastic modulus

Inactive Publication Date: 2020-02-28
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Epoxy resins containing curing agents are often used in the field of building materials to improve the mechanical properties, impermeability and durability of cement paste, but the application environment of oil well cement is more complicated, often accompanied by complex conditions such as high temperature and high pressure, and it cannot be directly applied to buildings. The resin used in the material is used in cementing

Method used

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  • Elastic modified resin for oil well cement and preparation method and application thereof
  • Elastic modified resin for oil well cement and preparation method and application thereof
  • Elastic modified resin for oil well cement and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of elastic modified resin for improving the elasticity of oil well cement

[0033] In terms of the weight of the epoxy resin base liquid, weigh 100 parts of the epoxy resin base liquid, weigh 10 parts of the epoxy resin curing agent, and then add the epoxy resin curing agent into the epoxy resin base liquid at a rate of 500±30r / Stir evenly at the rotating speed of min, and then obtain the elastic modified resin for improving the elasticity of oil well cement.

[0034] 2. Preparation of elastic cement slurry

[0035] Weigh 100 parts by weight of cement, 0.6 parts by weight of dispersant, 4 parts by weight of early strength agent, 3 parts by weight of water loss reducing agent, and 5 parts by weight of reinforcing agent, dry mix into dry powder, measure 36 parts by weight of fresh water, and weigh 50 parts by weight The elastic modified resin, 0.2 parts by weight retarder, and 1.5 parts by weight defoamer are dissolved in water. Then pour the aqueous sol...

Embodiment 2

[0037] 1. Preparation of elastic modified resin for improving the elasticity of oil well cement

[0038] In terms of the weight of the epoxy resin base liquid, weigh 100 parts of the epoxy resin base liquid, weigh 15 parts of the epoxy resin curing agent, and then add the epoxy resin curing agent into the epoxy resin base liquid at a rate of 500±30r / Stir evenly at the rotating speed of min, and then obtain the elastic modified resin for improving the elasticity of oil well cement.

[0039] 2. Preparation of elastic cement slurry

[0040] Weigh 100 parts by weight of cement, 0.45 parts by weight of dispersant, 3.5 parts by weight of early strength agent, 4 parts by weight of water loss reducing agent, and 4 parts by weight of reinforcing agent, dry mix into dry powder, measure 38 parts by weight of fresh water, and weigh 40 parts by weight The elastic modified resin, 0.3 parts by weight retarder, and 1 part by weight defoamer are dissolved in water. Then pour the aqueous sol...

Embodiment 3

[0042] 1. Preparation of elastic modified resin for improving the elasticity of oil well cement

[0043] In terms of the weight of the epoxy resin base liquid, weigh 100 parts of the epoxy resin base liquid, weigh 20 parts of the epoxy resin curing agent, and then add the epoxy resin curing agent into the epoxy resin base liquid at a rate of 500±30r / Stir evenly at the rotating speed of min, and then obtain the elastic modified resin for improving the elasticity of oil well cement.

[0044] 2. Preparation of elastic cement slurry

[0045]Weigh 100 parts by weight of cement, 0.35 parts by weight of dispersant, 2.5 parts by weight of early strength agent, 4 parts by weight of water loss reducing agent, and 3 parts by weight of reinforcing agent, dry mix into dry powder, measure 40 parts by weight of fresh water, and weigh 35 parts by weight The elastic modified resin, 0.4 parts by weight retarder, and 1 part by weight defoamer are dissolved in water. Then pour the aqueous solu...

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Abstract

The invention discloses elastic modified resin for oil well cement. The elastic modified resin comprises the following raw materials in parts by weight: 100 parts of an epoxy resin-based solution and10-25 parts of an epoxy resin curing agent. The invention further discloses well cementation cement paste. The ell cementation cement paste comprises the following raw material s in parts by weight: 100 parts of cement, 36-44 parts of fresh water, 3-6 parts of a fluid loss agent, 0.1-0.6 part of a dispersing agent, 1-4 parts of an early strength agent, 2-5 parts of a reinforcing agent, 0.2-0.6 part of a retarder, 0.5-1.5 parts of a defoaming agent and 20-50 parts of elastic modified resin. According to the invention, the elastic modified resin is used as an admixture functional material for oil well cement and is mixed with the oil well cement for use, so the damage resistance of a cement sheath is enhanced, and the cement paste has the advantages of good stability, no sedimentation phenomenon, good fluidity, adjustable thickening time and low water loss, and meets the requirements of cementing construction operation.

Description

technical field [0001] The invention relates to the technical field of elastic modification of oil well cement, in particular to an elastic modified resin for oil well cement. Background technique [0002] With the development of oil and gas fields, the cement sheath will be subjected to various loads such as the internal pressure transmitted by the casing, the confining pressure of the formation rock, the temperature strain caused by the temperature change of the wellbore, and the high pressure impact of the gas well during the drilling or production process. These effects will lead to changes in the stress state of the cement sheath sealing system, and in severe cases, the cement sheath sealing system will fail, interlayer channeling and casing damage will occur, and even the oil and gas well will be scrapped. Aiming at the risk of failure of cement in the wellbore, studies have shown that the cement slurry system with high elasticity and low modulus is the key to guarante...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/40C08G59/50C08G59/44C09K8/467C04B28/00C04B24/28C04B111/50
CPCC08G59/40C08G59/5033C08G59/5026C08G59/44C09K8/467C04B28/00C04B24/281C04B40/0039C04B2111/503C04B2111/00724C04B2103/408C04B2103/12C04B2103/46C04B2103/22C04B2103/50C04B18/146C04B18/141C04B24/121C04B24/04C04B24/287
Inventor 许明标宋建建王晓亮郭远曜徐鹏何淼刘卫红
Owner YANGTZE UNIVERSITY
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