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High temperature resistant filtrate loss reducer for drilling fluid and preparation method thereof

A filtrate reducer, high temperature resistance technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the fluid loss reducer is difficult to meet the high temperature and high requirements, to achieve good adsorption stability, particle size The effect of small diameter and improved high temperature resistance

Active Publication Date: 2019-12-20
重庆威能钻井助剂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high temperature resistant fluid loss reducer for drilling fluid and its preparation method, in order to solve the problem that the existing fluid loss reducer is difficult to meet high temperature resistance and high requirements in deep well and ultra-deep well mining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The anti-high temperature fluid loss reducer for drilling fluid of this embodiment includes: by weight, 30 parts of humic acid resin, 10 parts of acrylamide, 10 parts of acrylic acid, 10 parts of 2-acrylamido-2-methylpropanesulfonic acid 10 parts of maleic anhydride, 5 parts of N-vinylpyrrolidone and 5 parts of nanomaterials.

[0021] Wherein, the preparation steps of humic acid resin include: adding methyl vinyl cyclosiloxane prepolymer, acrylic acid, acrylamide and humate into water, stirring and dissolving to obtain a mixed solution, and adjusting the pH value to 7 The mixed solution was heated to 50°C, nitrogen gas was introduced for 25 minutes, and the mixed initiator was added under the protection of nitrogen atmosphere, and the reaction was stirred for 2 hours to obtain a corrosion acid resin. The humic acid content in the humic acid resin is 5wt%-10wt% of the humic acid resin; wherein, the molar ratio of methyl vinyl cyclosiloxane prepolymer, acrylic acid and ac...

Embodiment 2

[0026] The anti-high temperature fluid loss reducer for drilling fluid of this embodiment includes: by weight, 40 parts of humic acid resin, 15 parts of acrylamide, 20 parts of acrylic acid, 15 parts of 2-acrylamido-2-methylpropanesulfonic acid 15 parts of maleic anhydride, 10 parts of N-vinylpyrrolidone and 7 parts of nanomaterials.

[0027] Wherein, the preparation step of humic acid resin comprises: adding methylvinylcyclosiloxane prepolymer, acrylic acid, acrylamide and humic acid salt into water, stirring and dissolving to obtain a mixed solution, and adjusting the pH value to 8 for The mixed solution was heated to 60°C, and nitrogen gas was introduced for 30 minutes, then the mixed initiator was added under the protection of nitrogen atmosphere, and the reaction was stirred for 3 hours to obtain a corrosion acid resin. The humic acid content in the humic acid resin is 7wt% of the humic acid resin; among them, the molar ratio of methyl vinyl cyclosiloxane prepolymer, acry...

Embodiment 3

[0032] The anti-high temperature fluid loss reducer for drilling fluid of this embodiment includes: by weight, 45 parts of humic acid resin, 27 parts of acrylamide, 25 parts of acrylic acid, 23 parts of 2-acrylamido-2-methylpropanesulfonic acid 15 parts of maleic anhydride, 17 parts of N-vinylpyrrolidone and 7 parts of nanomaterials.

[0033] Wherein, the preparation step of the acid resin comprises: adding methyl vinyl cyclosiloxane prepolymer, acrylic acid, acrylamide and humic acid salt into water, stirring and dissolving to obtain a mixed solution, and adjusting the pH value to 9 for the The mixed solution was heated to 65° C., and nitrogen gas was introduced for 30 minutes, then the mixed initiator was added under the protection of nitrogen atmosphere, and the reaction was stirred for 3 hours to obtain a corrosion acid resin. The humic acid content in the humic acid resin is 810wt% of the humic acid resin; among them, the molar ratio of methyl vinyl cyclosiloxane prepolym...

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Abstract

Belonging to the technical field of oilfield exploitation and drilling treatment agents, the invention discloses a high temperature resistant filtrate loss reducer for drilling fluid and a preparationmethod thereof. The high temperature resistant filtrate loss reducer comprises: 30-60 parts of humic acid resin, 10-50 parts of acrylamide, 10-40 parts of acrylic acid, 10-30 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10-20 parts of maleic anhydride, 5-20 parts of N-vinyl pyrrolidone and 5-10 parts of a nano-material. The filtrate loss reducer disclosed by the invention is formed by graft copolymerization of corrosive acid resin and other monomers, and contains the nano-material, can effectively improve the temperature resistance and salt resistance of the filtrate loss reducer, andensures good performance under the conditions of a high temperature of 220DEG C and high salt.

Description

technical field [0001] The invention relates to the technical field of drilling treatment agents for oilfield production, in particular to a high-temperature anti-fluid loss reducer for drilling fluids and a preparation method thereof. Background technique [0002] With the increase of oil extraction, many oil fields have entered high-temperature deep oil production areas, and the extraction is becoming more and more difficult. In some production areas, fluid loss control agents are required to resist high temperatures above 200 °C. Although there are many kinds of fluid loss control agents currently used in the field, most of them are used in oil wells below 180 °C. When the oil well is in an environment above 200 °C, the fluid loss control effect is significantly reduced. In order to ensure the fluid loss control effect of drilling fluid, it is necessary Increase the amount of oilfield chemicals, but the addition of too much will not only increase the economic cost, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C08F285/00C08F220/56C08F220/06C08F220/58C08F222/06C08F226/10C08F2/44
CPCC08F2/44C08F285/00C09K8/03C09K2208/10C08F220/56C08F220/06
Inventor 葛炼钱帆胡宗建肖沣峰蒋弈黎杨芮欧猛谢显涛吴义
Owner 重庆威能钻井助剂有限公司
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