High-temperature-resistant filtrate reducer and preparation method thereof

A filtrate reducer, high temperature resistance technology, applied in the field of drilling fluid additives, can solve the problems of high cost, lack of high temperature resistance, ester group stability easily affected by high temperature, etc.

Active Publication Date: 2022-01-07
JINGZHOU JIAHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the force between the polymer fluid loss control agent and the clay particles (action force including hydrogen bond, electrostatic attraction) is small, and it is easy to desorb under high temperature conditions.
[0004] Existing technology (Luo Xiao et al., Preparation and performance research of heat-resistant and salt-resistant organosilicon fluid loss reducer, new chemical materials, 2017 No. 8: 122-124) using γ-(methacryloyloxy)propyl trimethyl Oxysilane was used as a modifier to synthesize a silicone copolymer fluid loss control agent (PKANS) containing ester groups, bu...

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  • High-temperature-resistant filtrate reducer and preparation method thereof
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preparation example Construction

[0026] The raw materials for the preparation of the anti-high temperature fluid loss reducer provided by the present invention include 10-20 parts by weight of acrylamide, preferably 12-18 parts, more preferably 14-16 parts.

[0027] Based on the parts by weight of acrylamide, the raw materials for the preparation of the anti-high temperature fluid loss reducer provided by the present invention include 10 to 20 parts by weight of sodium styrene sulfonate, preferably 12 to 18 parts, more preferably 14 parts by weight. ~16 servings. Sodium styrene sulfonate monomer, the raw material for the preparation of high-temperature fluid loss reducer of the present invention, can make the fluid loss reducer molecules have rigid large side groups, and its steric hindrance is large. Under high temperature conditions, the molecular flexibility can be reduced. Then reduce the thermal movement of molecules, and finally improve the high temperature resistance of the fluid loss control agent.

...

Embodiment 1

[0050] Weigh 10g of acrylamide, 20g of sodium styrene sulfonate, and 15g of acrylic acid, dissolve them in 200g of deionized water, add them to a three-necked round-bottomed flask equipped with a reflux spherical condenser and a stirrer, adjust the pH of the solution to 7 with NaOH, and set the temperature Rise to 80°C, after 30 minutes of blowing nitrogen, add 2.0g of vinyltrimethoxysilane dropwise at a rate of 0.5g / min, then add 0.1g of benzoyl peroxide, keep the temperature constant, stir, and fill with nitrogen Under the following conditions, after 12 hours of free radical polymerization reaction, a free radical polymerization reaction feed liquid is obtained;

[0051] The free radical polymerization reaction feed liquid is filtered, and the obtained solid is placed in a vacuum drying oven to dry to obtain a light yellow solid, which is the target product high temperature resistant fluid loss reducer.

Embodiment 2

[0053] Weigh 15g of acrylamide, 10g of sodium styrene sulfonate, and 20g of acrylic acid, dissolve them in 200g of deionized water, add them to a three-necked round-bottomed flask equipped with a reflux spherical condenser and a stirrer, adjust the pH of the solution to 8 with NaOH, and set the temperature Rise to 70°C, after 30 minutes of blowing nitrogen, add 2.5g of vinyltrimethoxysilane dropwise at a rate of 0.5g / min, then add 0.2g of ammonium persulfate, under the conditions of keeping the temperature constant, stirring and filling with nitrogen , after free radical polymerization reaction 10h, obtain free radical polymerization reaction liquid;

[0054] The free radical polymerization reaction feed liquid is filtered, and the obtained solid is placed in a vacuum drying oven to dry to obtain a light yellow solid, which is the target product high temperature resistant fluid loss reducer.

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Abstract

The invention belongs to the technical field of drilling fluid additives, and provides a high-temperature-resistant filtrate reducer and a preparation method thereof. According to the preparation raw material sodium p-styrenesulfonate monomer of the high-temperature-resistant filtrate reducer, filtrate reducer molecules can have rigid large side groups, the steric hindrance of the filtrate reducer molecules is large, under the high-temperature condition, the molecular flexibility can be reduced, then molecular thermal motion is reduced, and finally the high-temperature-resistant performance of the filtrate reducer is improved. Compared with gamma-(methacryloyloxy) propyl trimethoxy silane and a gamma-(acrylamido) propyl triethoxy silane coupling agent, the vinyl trimethoxy silane disclosed by the invention is low in cost, and the preparation cost of the high-temperature-resistant filtrate reducer can be reduced. Besides, the vinyltrimethoxysilane is connected with the main chain of the filtrate reducer through a carbon-carbon bond, so that the defect that amide groups between other silane coupling agents and the main chain of the filtrate reducer are easy to decompose at high temperature is overcome, and the high-temperature resistance of the filtrate reducer is improved.

Description

technical field [0001] The invention relates to the technical field of drilling fluid additives, in particular to a high temperature resistant fluid loss reducer and a preparation method thereof. Background technique [0002] With the gradual development of oil and gas resources in high-temperature deep wells and complex wells, challenges are posed to drilling fluid technology. The performance of drilling fluid will deteriorate at high temperature, such as the decrease of viscosity, the deterioration of wall-building performance and the increase of filtration. The deterioration of the above-mentioned performance of drilling fluid may easily cause drilling safety accidents. The fluid loss reducer used in drilling fluid has a great influence on the wall-building performance and fluid loss of drilling fluid, especially under high temperature conditions. Therefore, the high temperature resistance performance of fluid loss control agent plays a decisive role in the performance o...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F212/14C08F230/08C09K8/035C09K8/24
CPCC08F220/56C08F220/06C08F212/30C09K8/035C09K8/24C08F230/085
Inventor 许明标由福昌高阳周书胜
Owner JINGZHOU JIAHUA TECH
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