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A temperature-resistant and salt-resistant oil well cement fluid loss reducer and its preparation method and application

A technology of fluid loss reducer and oil well cement, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor salt resistance of fluid loss reducer, achieve a wide range of applicable temperatures, and have little influence on thickening time , good effect of salt resistance

Active Publication Date: 2018-06-08
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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  • A temperature-resistant and salt-resistant oil well cement fluid loss reducer and its preparation method and application
  • A temperature-resistant and salt-resistant oil well cement fluid loss reducer and its preparation method and application
  • A temperature-resistant and salt-resistant oil well cement fluid loss reducer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 100 parts of water, 7 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 7 parts of N,N-dimethylacrylamide (DMAA); 4,4'-diaminostilbene- 3 parts of 2,2'-disulfonic acid; 2 parts of 4,4-stilbene dicarboxylic acid; 1 part of methallyl alcohol polyoxyethylene ether (TPEG-2400); stir for 2 minutes. Add 1 part of hydroxide (NaOH), heat to 50°C and keep for 10 minutes; then add 0.1 parts of ammonium persulfate and sodium bisulfite at the same time while stirring, and react for 1 hour under stirring to obtain the present invention Water loss reducer.

Embodiment 2

[0045] 100 parts of water, 8 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 8 parts of N,N-dimethylacrylamide (DMAA); 4,4'-diaminostilbene- 4 parts of 2,2'-disulfonic acid; 3 parts of 4,4-stilbene dicarboxylic acid; 2 parts of methallyl alcohol polyoxyethylene ether (TPEG-2400); stir for 10 minutes. Add 2 parts of hydroxide (NaOH), heat to 80°C and keep for 1 hour; then add 0.2 parts of ammonium persulfate and sodium bisulfite while stirring, and react for 5 hours under stirring to obtain the Water loss reducer.

Embodiment 3

[0047] 100 parts of water, 9 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS); 8 parts of N,N-dimethylacrylamide (DMAA); 4,4'-diaminostilbene- 5 parts of 2,2'-disulfonic acid; 4 parts of 4,4-stilbene dicarboxylic acid; 3 parts of methallyl alcohol polyoxyethylene ether (TPEG-2400); stir for 5 minutes. Add 3 parts of hydroxide (NaOH), heat to 60°C and keep for 0.5 hours; then, under stirring, add 0.2 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 heat-resistance and salt-tolerance oil well cement filtrate reducer, which comprises the following ingredients (by weight): 100 parts of water, 7-9 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 7-9 parts of N,N-dimethylacrylamide (DMAA), 3-5 parts of 4,4'-diaminostilbene-2,2'-disulfonic acid, 2-4 parts of 4,4-stilbene dicarboxylic acid, 1-3 parts of TPEG-2400, 1-3 parts of sodium hydroxide (NaOH), 0.1-0.3 part of ammonium persulfate and 0.1-0.3 part of sodium bisulfate. The invention also relates to a preparation method and 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 Patents(China)
IPC IPC(8): C08F220/58C08F220/56C08F212/32C09K8/487
Inventor 张明昌刘学鹏张林海周仕明刘伟
Owner CHINA PETROLEUM & CHEM CORP
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