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Retarder with water loss reduction function and preparation method thereof

A technology for reducing water loss and setting retarder, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve single problems, and achieve the effects of simple production process, low dosage sensitivity and good compatibility

Pending Publication Date: 2021-01-22
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for controlling the dehydration of cement slurry, the existing methods are relatively simple, so a kind of retarding that can not only prolong the thickening time of cement slurry, but also not affect the dehydration of cement slurry or even have a certain function of reducing dehydration is needed. agent

Method used

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  • Retarder with water loss reduction function and preparation method thereof
  • Retarder with water loss reduction function and preparation method thereof
  • Retarder with water loss reduction function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] This embodiment discloses a retarder with the function of reducing water loss, including AMPS, AA and initiator, wherein the monomer molar ratio of AMPS to AA is (30-80):(20-70); It is a redox type initiator, and the initiator is a redox body of ammonium persulfate-sodium bisulfite, and its dosage is 0.5%-2.5% of the monomer mass.

[0034] In this example, the monomer molar ratio of AMPS to AA is 70:30; the amount of initiator added is 1% of the monomer mass.

Embodiment 2

[0036] This example is basically similar to Example 1, except that the monomer molar ratio of AMPS to AA is 80:20; the amount of initiator added is 0.5% of the monomer mass.

Embodiment 3

[0038] This example is basically similar to Example 1, except that the monomer molar ratio of AMPS to AA is 73:27; the amount of initiator added is 1.5% of the monomer mass.

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Abstract

The invention discloses a retarder with a water loss reduction function, which comprises AMPS (2-acrylamido-2-methylpropanesulfonic acid), AA (acrylic acid) and an initiator, wherein the monomer molarratio of AMPS to AA is (30-80): (20-70), wherein the initiator is a redox initiator, the initiator is a redox body of ammonium persulfate-sodium hydrogen sulfite, and the addition amount of the redoxbody is 0.5%-2.5% of the mass of the monomer. In addition, the invention further discloses a preparation method of the retarder with the water loss reduction function. According to the present invention, by researching the monomer ratio, the reaction pH value, the reaction temperature, the initiator addition amount and the reaction time, various parameters during the retarder preparation are precisely controlled, such that the prepared retarder can provide the thickening time prolonging effect on the cement slurry while the water loss of the cement slurry is not affected.

Description

technical field [0001] The invention relates to the technical field of oilfield cementing admixtures, in particular to a retarder with the function of reducing water loss; in addition, the invention also relates to a preparation method of the retarder with the function of reducing water loss. Background technique [0002] In the process of exploration and development of oil and gas fields, cementing engineering is an important part of drilling and completion engineering. The quality of cementing is not only the prerequisite for the normal implementation of engineering operations such as follow-up exploitation and enhanced reservoir stimulation, but also the normal operation of Yanchang oil and gas wells. It is an important guarantee for production life, discovery and full increase of production capacity, and improvement of oil and gas field exploration and development benefits. In the current cementing construction, the cementing retarder plays an important role, which is ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/06C08F4/40C09K8/467C04B24/16C04B103/22
CPCC08F220/585C08F220/06C08F4/40C09K8/467C04B24/163C04B2103/22
Inventor 王良才刘俊颜磊邓天安张云华姚勇洪少青吕聪焦建芳邓平罗龙尹艳汪玲黄琛
Owner 中石化石油工程技术服务有限公司
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