Heatproof salt-resistant oil well cement fluid loss agent, preparation method and application thereof

A fluid loss reducing agent, oil well cement technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as poor salt tolerance of the fluid loss reducing agent, and achieve a wide range of applicable temperature, good salt resistance, The effect of good adaptation

Inactive Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluid loss reducers disclosed in patents CN103881670A and CN104193897A have poor salt tolerance

Method used

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  • Heatproof salt-resistant oil well cement fluid loss agent, preparation method and application thereof
  • Heatproof salt-resistant oil well cement fluid loss agent, preparation method and application thereof
  • Heatproof salt-resistant oil well cement fluid loss agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 100 parts of water, 8 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 4 parts of acrylamide (AM); 4 parts of N,N-dimethylacrylamide (DMAA); vinyl sulfonate 1 part of acid (VSA); 2 parts of vinyl imidazole (VM); 1 part of methallyl polyoxyethylene ether (HPEG-2400); stir for 2 minutes. Add 1 part of hydroxide (NaOH), while heating to 40 ° C, and keep for 10 minutes; then, under stirring, add 0.1 parts of ammonium persulfate and sodium bisulfite at the same time, and react for 1 hour under stirring to obtain the present invention. Water loss reducer.

Embodiment 2

[0048] 100 parts of water, 9 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 5 parts of acrylamide (AM); 5 parts of N,N-dimethylacrylamide (DMAA); vinyl sulfonate 2 parts of acid (VSA); 3 parts of vinyl imidazole (VM); 2 parts of methallyl polyoxyethylene ether (HPEG-2400); stir for 15 minutes. Add 2 parts of hydroxide (NaOH), heat to 70°C and keep for 1 hour; then add 0.2 parts of ammonium persulfate and sodium bisulfite at the same time while stirring, and react for 5 hours under stirring to obtain the present invention. Water loss reducer.

Embodiment 3

[0050]100 parts of water, 10 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 6 parts of acrylamide (AM); 6 parts of N,N-dimethylacrylamide (DMAA); vinyl sulfonate 3 parts of acid (VSA); 4 parts of vinyl imidazole (VM); 3 parts of methallyl polyoxyethylene ether (HPEG-2400); stir for 5 minutes. Add 3 parts of hydroxide (NaOH), while heating to 50 ° C, and keep for 0.5 hours; then under stirring, add 0.3 parts of ammonium persulfate and sodium bisulfite at the same time, and react for 3 hours under stirring to obtain the present invention. Water loss reducer.

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Abstract

The invention relates to a heatproof salt-resistant oil well cement fluid loss agent. The salt-resistant oil well cement fluid loss agent comprises the following components in parts by weight: 100 parts of water, 8-12 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 4-6 parts of acrylamide (AM), 4-6 parts of N,N-dimethylacrylamide (DMAA), 1-3 parts of vinyl sulfonic acid (VSA), 2-4 parts of vinyl imidazole (VM), 1-3 parts of methyl allyl polyethenoxy ether (HPEG-2400), 1-3 parts of sodium hydroxide (NaOH), 0.1-0.3 parts of ammonium persulfate, and 0.1-0.3 parts of sodium bisulfate. The invention also relates to a preparation method of the additive and an application of the additive.

Description

technical field [0001] The invention relates to an additive, in particular to an additive in the field of oil and gas well cementing. The invention also relates to the preparation method and application of the additive. Background technique [0002] In the cementing operation of oil and gas wells, the cement slurry is pumped into the well through the pumping of the cement truck, and the cement slurry is replaced into the annular space between the casing and the wellbore through the process of replacing the slurry, so as to isolate the oil, gas and water layers The purpose of protecting the production layer and supporting the protective casing. [0003] Oil well cement fluid loss reducer is an admixture for oil well cement, usually used in cement slurry used in oil and gas well cementing operations. The fluid loss reducer for oil well cement slurry can control the fluid loss in the cement slurry to the permeable formation, so as to maintain the proper water-cement ratio of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/487C08F283/06C08F220/58C08F220/56C08F220/54C08F228/02C08F226/06
CPCC08F283/06C09K8/035C09K8/487C08F220/585
Inventor 张明昌刘学鹏方春飞刘伟周仕明
Owner CHINA PETROLEUM & CHEM CORP
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