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Preparation method of environment-friendly ultrahigh-temperature-resistant filtrate reducer for water-based drilling fluid

A technology of water-based drilling fluid and fluid loss control agent, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor cross-linking effect, insufficient high temperature resistance, and solution degradation failure, etc., and achieve excellent The effect of reducing fluid loss, improving hydrolysis resistance, and stabilizing colloidal particles

Active Publication Date: 2020-11-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, N,N-methylenebisacrylamide is prone to hydrolysis of the amide bond in the drilling fluid environment, resulting in poor crosslinking effect
[0006] At present, the existing polymer fluid loss reducers have the following disadvantages: (1) Insufficient high temperature resistance, solution degradation and failure under high temperature conditions, cannot meet the needs of deep formation drilling; (2) Poor environmental performance, cannot meet the needs of environmentally sensitive areas drilling requirements

Method used

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  • Preparation method of environment-friendly ultrahigh-temperature-resistant filtrate reducer for water-based drilling fluid
  • Preparation method of environment-friendly ultrahigh-temperature-resistant filtrate reducer for water-based drilling fluid
  • Preparation method of environment-friendly ultrahigh-temperature-resistant filtrate reducer for water-based drilling fluid

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Experimental program
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Effect test

Embodiment 1

[0041] A method for preparing an environment-friendly anti-ultra-high temperature fluid loss reducer for water-based drilling fluids, comprising the following steps:

[0042] (1) Preparation of nano-crosslinking agent:

[0043] Add 10g of nano-hectorite and 2g of silane coupling agent KH570 to 100mL of acetone in sequence, and react at 80°C for 6h under the stirring condition of 300r / min; after the reaction is completed, filter and wash the filtered product with ethanol, dry, And grind it into a powder smaller than 200 mesh to obtain the nanometer crosslinking agent.

[0044] (2) Preparation of oil phase:

[0045] 13g of Span 80 was dissolved in 300mL of white oil, and 5g of the nano-crosslinking agent prepared in step (1) was added to obtain an oil phase.

[0046] (3) Preparation of water phase:

[0047] Add 30g acrylamide, 20g 2-acrylamido-2-methylpropanesulfonic acid, 2g dimethyl diallyl ammonium chloride, 0.1g triallyl isocyanurate to 200mL distilled water successively,...

Embodiment 2

[0050] A method for preparing an environment-friendly anti-ultra-high temperature fluid loss reducer for water-based drilling fluids, comprising the following steps:

[0051] (1) Preparation of nano-crosslinking agent:

[0052] Add 10g of nano-hectorite and 2g of silane coupling agent KH570 to 100mL of acetone in sequence, and react at 80°C for 6h under the stirring condition of 300r / min; after the reaction is completed, filter and wash the filtered product with ethanol, dry, And grind it into a powder smaller than 200 mesh to obtain the nanometer crosslinking agent.

[0053] (2) Preparation of oil phase:

[0054] 13g of Span 80 was dissolved in 300mL of white oil, and 10g of the nano-crosslinking agent prepared in step (1) was added to obtain an oil phase.

[0055] (3) Preparation of water phase:

[0056] Add 30g of acrylamide, 20g of sodium styrene sulfonate, 2g of dimethyl diallyl ammonium chloride, and 0.2g of divinylbenzene to 200mL of distilled water in sequence, and ...

Embodiment 3

[0059] A method for preparing an environment-friendly anti-ultra-high temperature fluid loss reducer for water-based drilling fluids, comprising the following steps:

[0060] (1) Preparation of nano-crosslinking agent:

[0061] Add 10g of nano-hectorite and 2g of silane coupling agent KH570 to 100mL of acetone in sequence, and react at 80°C for 6h under the stirring condition of 300r / min; after the reaction is completed, filter and wash the filtered product with ethanol, dry, And grind it into a powder smaller than 200 mesh to obtain the nanometer crosslinking agent.

[0062] (2) Preparation of oil phase:

[0063] 13g of Span 80 was dissolved in 300mL of white oil, and 5g of the nano-crosslinking agent prepared in step (1) was added to obtain an oil phase.

[0064] (3) Preparation of water phase:

[0065] Add 40g acrylamide, 15g 2-acrylamido-2-methylpropanesulfonic acid, 2g dimethyl diallyl ammonium chloride, 0.1g triallyl isocyanurate to 200mL distilled water successively,...

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Abstract

The invention provides a preparation method of an environment-friendly ultrahigh-temperature-resistant filtrate reducer for a water-based drilling fluid, which comprises the following steps: reactingnano hectorite with a silane coupling agent to obtain a nano cross-linking agent; and in the presence of a nano cross-linking agent and an initiator, carrying out polymerization reaction on an amide monomer, a high-temperature-resistant monomer, a cationic monomer and a polyene monomer by using an inverse emulsion polymerization method to obtain the environment-friendly ultrahigh-temperature-resistant filtrate reducer. The filtrate reducer prepared by the preparation method disclosed by the invention can resist high temperature and has an excellent filtrate reduction effect and good environmental protection performance. The filtrate reducer disclosed by the invention is not only suitable for deep and ultra-deep oil and gas drilling, but also suitable for drilling of geothermal wells and environment-sensitive areas.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly anti-ultra-high temperature fluid loss reducer for water-based drilling fluid, belonging to the field of oilfield chemistry in the petroleum industry. Background technique [0002] High-temperature resistant water-based drilling fluid is a key technology for high-temperature formation drilling, and plays an irreplaceable role in the exploration and development of deep and ultra-deep oil and gas resources, geothermal resources, and continental scientific drilling. Among them, in the field of oil and gas resources, as exploration and development develop into deep and ultra-deep layers, the formation temperature is getting higher and higher, and the temperature of deep reservoirs can reach 200-260 °C (in drilling engineering, greater than 200 °C is considered ultra-high temperature). In high-temperature formation drilling projects, the high-temperature stability of drilling fluids is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/56C08F220/58C08F226/02C08F226/06C08F212/14C08F212/36C09K8/03C09K8/24
CPCC08F292/00C09K8/03C09K8/24C09K2208/10C08F220/56C08F220/585C08F226/02C08F226/06C08F212/30C08F212/36
Inventor 黄贤斌孙金声吕开河金家锋刘敬平白英睿王金堂
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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