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Polymer latex coagulant for oil-absorbing swelling of cement-based materials

A cement-based material and polymer glue technology, applied in the field of petroleum exploration, can solve the problems of strong retardation and gelation, and achieve the effects of good high temperature dispersion, early strength improvement, and high temperature rheology improvement.

Active Publication Date: 2019-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of gelation and strong retardation of polymer latex cement slurry that can absorb oil and expand at higher temperatures in the prior art, and meet the construction requirements under different conditions, the present invention provides a cement-based cement slurry for oil-absorbing expansion. The polymer latex coagulant of the material, which can obviously avoid the gelation and retardation phenomenon in the polymer latex cement slurry

Method used

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  • Polymer latex coagulant for oil-absorbing swelling of cement-based materials
  • Polymer latex coagulant for oil-absorbing swelling of cement-based materials
  • Polymer latex coagulant for oil-absorbing swelling of cement-based materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In 286g water, add 64g acrylate polymer latex (the molar ratio of its polymerization monomer methacrylic acid, butyl methacrylate, hexadecyl methacrylate and styrene is 6:48:12:115), 2.4 g of citric acid and 0.8 g of diethanolamine were stirred evenly, and 800 g of grade G oil well cement was added thereto, and stirred evenly at a uniform speed to obtain polymer latex cement slurry.

Embodiment 2

[0043] In 270g water, add 80g of acrylic acid ester polymer latex and its polymerization monomer (the mol ratio of its polymerization monomer acrylic acid, hexyl methacrylate and styrene is 5:92:115), 4g tartaric acid, triethanolamine 1.2g, stir Evenly, add 800g of G-grade oil well cement into it, and stir at a uniform speed to obtain polymer latex cement slurry.

Embodiment 3

[0045] Add 80g of acrylic acid ester polymer latex in 270g of water (the molar ratio of its polymerization monomer methacrylic acid, butyl methacrylate, hexadecyl methacrylate and styrene is 6:67:19:115), 4.8 g of gluconic acid and 1.6 g of triethanolamine were stirred evenly, and 800 g of grade G oil well cement was added thereto, and stirred evenly at a uniform speed to obtain polymer latex cement slurry.

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Abstract

The invention discloses a polymer latex solidification adjustive agent used for oil absorption expansion of a cement base material, and the polymer latex solidification adjustive agent includes 46-76 parts by weight of a hydroxy carboxylic acid component and 10-24 parts by weight of an organic alcohol amine component. The polymer latex solidification adjustive agent can effectively solve the problem of serious influence on rheological properties and thickening performance of cement slurry due to gelation and strong delayed coagulation phenomenon of polymer latex cement slurry caused by polymer latex effect at high temperature. The present invention also provides a combination additive used for the oil absorption expansion of the cement base material and cement base material slurry used for the oil absorption expansion of the cement base material and a preparation method and application thereof.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a polymer latex coagulant for oil-absorbing swelling of cement-based materials, a combined additive for oil-absorbing swelling of cement-based materials, and also to a cement-based cement-based material for oil-absorbing swelling of cement-based materials Material slurry and preparation method thereof. Background technique [0002] With the continuous deepening of domestic oil and gas exploration, the failure of the interlayer seal of the cement sheath and the damage of the cement sheath have brought great challenges to the safe, long-term and efficient development of oil and gas wells. The annular pressure problem caused by oil and gas cross-flow can shorten the life of oil and gas wells, require high remedial costs and long remedial time, and the success rate is low. By adding a special water-based polymer oil-absorbing swelling polymer latex to the cement, and adding it t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467C04B24/24C04B24/12
Inventor 刘伟王其春汪晓静曾敏刘学鹏刘建
Owner CHINA PETROLEUM & CHEM CORP
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