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Oil well cement water-loss control agent compatible with AMPS (2-acrylamido-methylpropanesulfonic acid)-IA retarder and preparation method thereof

A technology of oil well cement and fluid loss reducer, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of high cement slurry consistency and poor compatibility with retarder AMPS-IA, etc.

Inactive Publication Date: 2015-12-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluid loss reducer synthesized by this method has good compatibility with the setting retarder AMPS-IA, which can solve the problem of poor compatibility between the conventional fluid loss reducer and the setting retarder AMPS-IA, and the fluid loss reducer has good Dispersion properties can improve the rheological properties of cement slurry while reducing the water loss of cement slurry, and solve the problem of high consistency of cement slurry caused by conventional fluid loss reducing agents. In actual construction, it can meet the construction requirements without using dispersants

Method used

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  • Oil well cement water-loss control agent compatible with AMPS (2-acrylamido-methylpropanesulfonic acid)-IA retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 61.4 parts of 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 18.3 parts of N, N'-dimethylacrylamide (DMAA), 13.07 parts of acrylamide (AM), maleic anhydride (MA ) 7.23 copies. Dissolve in 308 parts of deionized water, add an appropriate amount of sodium hydroxide solution, and adjust the pH value to 5. Add the solution into the three-necked flask, put the three-necked flask into a constant temperature water bath at 60°C, start stirring, and pass nitrogen gas into the three-necked flask to remove oxygen. After the temperature of the aqueous solution in the three-necked flask reaches 60°C, add 4 parts of The mass concentration of ammonium sulfate and sodium bisulfite is 10% of the mixed solution to initiate the reaction, and the reaction lasts for 5 hours to make a tetrapolymer solution, which is dried and pulverized to obtain oil well cement compatible with the retarder AMPS-IA Dehydration reducer powder. Code-named as sample 1.

Embodiment 2

[0017] Weigh 61.4 parts of 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 18.3 parts of N, N'-dimethylacrylamide (DMAA), 13.07 parts of acrylamide (AM), maleic anhydride (MA ) 7.23 copies. Dissolve in 308 parts of deionized water, add an appropriate amount of sodium hydroxide solution, and adjust the pH value to 2. Add the solution into the three-necked flask, put the three-necked flask into a constant temperature water bath at 60°C, start stirring, and pass nitrogen gas into the three-necked flask to remove oxygen. After the temperature of the aqueous solution in the three-necked flask reaches 60°C, add 4 parts of The mass concentration of ammonium sulfate and sodium bisulfite is 10% of the mixed solution to initiate the reaction, and the reaction lasts for 5 hours to make a tetrapolymer solution, which is dried and pulverized to obtain oil well cement compatible with the retarder AMPS-IA Dehydration reducer powder. Code-named sample 2.

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Abstract

The invention provides an oil well cement water-loss control agent compatible with an AMPS (2-acrylamido-methylpropanesulfonic acid)-IA retarder and a preparation method thereof. The water-loss control agent prepared by the method is used for lowering water loss of cement paste in the petroleum and natural gas well drilling and cementing process. The water-loss control agent prepared by the method is a quadripolymer prepared from comonomers of AMPS, N,N'-dimethylacrylamide (DMAA), acrylamide (AM) and maleic anhydride (MA) by using an ammonium persulfate-sodium bisulfite mixed solution as an initiator. The water-loss control agent provided by the invention has favorable water loss control capacity and favorable capacity for improving rheological properties of the cement paste, and has favorable compatibility with the retarder AMPS-IA.

Description

[0001] Inventors: Guo Shenglai, Bu Yuhuan, Guo Xinyang, Wang Chengwen technical field [0002] The invention relates to an oil well cement fluid loss reducing agent for oil field cementing and a preparation method thereof, belonging to the fields of oil field chemistry and oil gas well cementing. The fluid loss reducing agent prepared by the method is used for reducing the fluid loss of cement slurry in the cementing process of oil and gas wells. Background technique [0003] After oil and gas well drilling is completed, it is necessary to run casing and pump cement slurry to seal the annular space between the casing and the formation. Typically, the cement slurry is pumped downhole through the casing and back up the annulus. Due to the complex formation conditions and harsh downhole conditions, the free water in the cement slurry will filter out from the cement slurry and enter the formation under the action of the pressure difference during cementing. This process is usua...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F220/56C08F222/06C08F2/10C09K8/487
Inventor 郭胜来步玉环郭辛阳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)