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Special high-temperature suspending agent for oil well cement and preparation method thereof

A technology of oil well cement and suspending agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems that have not been solved well, and achieve the effect of simple operation, good compatibility, and high application temperature

Inactive Publication Date: 2020-05-15
四川安钮诺斯油气能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the settlement problem of cement slurry in the process of high temperature coagulation and the micro-annulus problem of cement cement caused by the shrinkage of cement stone have not been well solved in the cementing field at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Prepare high-temperature suspending agent raw materials, which are composed of the following components in parts by weight: 12.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of vinylpyrrolidone, 8 parts of acrylamide crystals, and 70 parts of deionized water 0.03 parts of potassium persulfate, 0.015 parts of white powder, 3.5 parts of sodium hydroxide, 75 parts of magnesium aluminum silicate;

[0018] (2) Put deionized water, 2-acrylamide-2-methylpropanesulfonic acid, vinylpyrrolidone, and acrylamide crystals into the reaction kettle in sequence, stir evenly, and neutralize with 40% sodium hydroxide solution until the pH is 5.5; heat up to 70°C, and under the protection of nitrogen, sequentially add dropwise a potassium persulfate solution with a concentration of 1%, and a solution of white powder with a concentration of 0.5%. Below ℃, the raw material A is obtained;

[0019] (3) Take 100 parts by weight of raw material A into the kneader, add 75 par...

Embodiment 2

[0021] (1) Prepare high-temperature suspending agent raw materials, which are composed of the following components in parts by weight: 12.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of vinylpyrrolidone, and 8 parts of acrylamide crystals , 70 parts of deionized water, 0.03 parts of potassium persulfate, 0.015 parts of white powder, 3.5 parts of sodium hydroxide, 75 parts of magnesium aluminum silicate;

[0022] (2) Put deionized water, 2-acrylamide-2-methylpropanesulfonic acid, vinylpyrrolidone, and acrylamide crystals into the reaction kettle in sequence, stir evenly, and neutralize with 40% sodium hydroxide solution until the pH is 5.5; raise the temperature to 68°C, under the protection of nitrogen, add dropwise potassium persulfate with a concentration of 1%, and a solution of 0.5% potassium persulfate successively, stir evenly, stand for polymerization for 3 hours, and cool down to 50°C with stirring Following, obtain raw material A;

[0023] (3) Take 1...

Embodiment 3

[0025] (1) Prepare high-temperature suspending agent raw materials, which are composed of the following components in parts by weight: 12.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of vinylpyrrolidone, and 8 parts of acrylamide crystals , 70 parts of deionized water, 0.04 parts of potassium persulfate, 0.022 parts of white powder, 3.5 parts of sodium hydroxide, 75 parts of magnesium aluminum silicate;

[0026] (2) Put deionized water, 2-acrylamide-2-methylpropanesulfonic acid, vinylpyrrolidone, and acrylamide crystals into the reaction kettle in sequence, stir evenly, and neutralize with 40% sodium hydroxide solution until the pH is 5.5; raise the temperature to 68°C, under the protection of nitrogen, add dropwise potassium persulfate with a concentration of 1%, and a solution of 0.5% potassium persulfate successively, stir evenly, stand for polymerization for 3 hours, and cool down to 50°C with stirring Following, obtain raw material A;

[0027] (3) Take 1...

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Abstract

The invention discloses a special high-temperature suspending agent for oil well cement and a preparation method thereof. The suspending agent is prepared from the following components in parts by weight: 10 to 20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 to 10 parts of vinyl pyrrolidone, 5 to 10 parts of acrylamide crystals, 60 to 80 parts of deionized water, 0.01 to 0.05 part of potassium persulfate, 0.01 to 0.05 part of formaldehyde sodium sulfoxylate, 2 to 5 parts of sodium hydroxide and 60 to 80 parts of magnesium aluminum silicate. The method is simple in principle, reliablein technology and easy and convenient to operate, the prepared high-temperature suspending agent is high in application temperature, has no influence on other properties of cement paste, is good in compatibility, particularly does not influence the rheological property of the cement paste at low temperature, can be well suitable for a high-temperature cement paste system, and overcomes the defectsof an existing oil well cement paste high-temperature suspending agent.

Description

technical field [0001] The invention relates to a cement admixture used in the cementing field of oilfield well completion technology, in particular to a special high-temperature suspending agent for oil well cement and a preparation method thereof, which is mainly used for improving the settlement stability of high-temperature cement slurry. Background technique [0002] In recent years, with the continuous deepening of exploration and development, the number of deep and ultra-deep wells has increased year by year, and the bottom hole temperature has become higher and higher. During the high-temperature and ultra-high-temperature cementing process, part of the admixture in the cement slurry degrades and fails at high temperature, causing the cement slurry particles to settle and stratify. Especially in high-temperature deep horizontal wells, due to the high-edge water zone produced by slurry settlement, the cement sheath loses its proper interlayer isolation. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/56C08F226/10C09K8/467
CPCC08F220/58C09K8/467
Inventor 付洪琼赵仕华
Owner 四川安钮诺斯油气能源技术有限公司
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