Inorganic/polymer composite plugging agent for ultrahigh-temperature-resistant oil-based drilling fluid, and preparation method and application thereof

An oil-based drilling fluid and composite material technology, which is applied in the field of polymer composite plugging agents, can solve problems such as poor adaptability, insufficient adsorption performance, and poor temperature resistance, so as to overcome poor temperature resistance, increase deformability, and enhance The effect of force

Active Publication Date: 2020-12-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention utilizes emulsion polymerization to synthesize an inorganic / polymer composite plugging agent for ultra-high temperature oil-based drilling fluid. The plugging agent of the present invention is a high-temperature resistant plugging agent with a core-shell structure composed of acrylic resin and inorganic particles. , overcoming the shortcomings of existing plugging agents for oil-based drilling fluids, such as poor temperature resistance, poor adaptability, and insufficient adsorption performance

Method used

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  • Inorganic/polymer composite plugging agent for ultrahigh-temperature-resistant oil-based drilling fluid, and preparation method and application thereof
  • Inorganic/polymer composite plugging agent for ultrahigh-temperature-resistant oil-based drilling fluid, and preparation method and application thereof
  • Inorganic/polymer composite plugging agent for ultrahigh-temperature-resistant oil-based drilling fluid, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A method for preparing an inorganic / polymer composite plugging agent for ultra-high temperature oil-based drilling fluid, comprising the following steps:

[0044] (1) Heat 100g of quartz powder to 60°C, add 2g of ammonia water, stir for 30min at a stirring rate of 500r / min, and dry the resulting product at 120°C for 5h to obtain dried quartz powder; Heat the powder to 120°C, then add 0.5g of silane coupling agent KH570, and react for 60min at a stirring rate of 500r / min and a temperature of 120°C to obtain silane coupling agent-modified quartz powder;

[0045] (2) Mix 18g of styrene, 5g of methyl methacrylate, 5g of butyl acrylate, 1g of vinyltrichlorosilane, and 2g of polyetheramine D230 to obtain mixture A;

[0046] (3) Dissolve 2g of emulsifier MS-1 in 70mL of deionized water, stir evenly to obtain an emulsifier solution; then add 7g of silane coupling agent-modified quartz powder prepared in step (1) to the emulsifier solution and step (2) The obtained mixture A wa...

Embodiment 2

[0049] A method for preparing an inorganic / polymer composite plugging agent for ultra-high temperature oil-based drilling fluid, comprising the following steps:

[0050] (1) Heat 100g of dried quartz powder to 60°C, add 2g of ammonia water, stir for 30min at a stirring rate of 500r / min, and dry the resulting product at 120°C for 5h to obtain dried quartz powder; The quartz powder was heated to 120°C, and then 0.5g of silane coupling agent KH560 was added, and the stirring rate was 500r / min, and the temperature was 120°C for 60 minutes to obtain silane coupling agent modified quartz powder;

[0051] (2) Mix 18g of styrene, 5g of methyl methacrylate, 5g of lauryl acrylate, 1g of vinyltrichlorosilane, and 2g of polyetheramine D230 to obtain mixture A;

[0052] (3) Dissolve 2g of emulsifier MS-1 in 70mL of deionized water, stir evenly to obtain an emulsifier solution; then add 7g of silane coupling agent-modified quartz powder prepared in step (1) to the emulsifier solution and st...

Embodiment 3

[0055] A method for preparing an inorganic / polymer composite plugging agent for ultra-high temperature oil-based drilling fluid, comprising the following steps:

[0056] (1) Heat 100g of dried quartz powder to 60°C, add 2g of ammonia water, stir for 30min at a stirring rate of 500r / min, and dry the resulting product at 120°C for 5h to obtain dried quartz powder; The quartz powder was heated to 120°C, and then 0.5g of silane coupling agent KH570 was added, and the stirring rate was 500r / min, and the temperature was 120°C for 60 minutes to obtain silane coupling agent modified quartz powder;

[0057] (2) Mix 20g of styrene, 3g of methyl methacrylate, 5g of butyl acrylate, 1g of vinyltriethoxysilane, and 1g of polyetheramine D230 to obtain mixture A;

[0058] (3) Dissolve 2g of emulsifier MS-1 in 70mL of deionized water, stir evenly to obtain an emulsifier solution; then add 5g of silane coupling agent modified quartz powder prepared in step (1) to the emulsifier solution and ste...

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Abstract

The invention provides an inorganic / polymer composite plugging agent for an ultrahigh-temperature-resistant oil-based drilling fluid, and a preparation method and application thereof. The plugging agent has a core-shell structure, the core is silane coupling agent modified quartz powder, and the shell is an acrylic resin material; the acrylic resin material is prepared from styrene, a vinyl-containing organic silicon monomer and a high-temperature-resistant monomer; and the high-temperature-resistant monomer comprises an oil-soluble hard monomer and an oil-soluble soft monomer. The invention also provides a preparation method of the plugging agent. The plugging agent disclosed by the invention is high in lipophilicity and has relatively good dispersity in an oil-based system; and the plugging agent has the advantages of good high-temperature resistance, good adaptability, good adsorption performance and excellent plugging capability.

Description

technical field [0001] The invention relates to a polymer composite plugging agent for ultra-high temperature resistant oil-based drilling fluid, a preparation method and application thereof, belonging to the technical field of oilfield chemistry in the petroleum industry. Background technique [0002] Drilling fluid, known as the "blood" of drilling, is a complex colloid-suspension multi-stage dispersion system formed by clay particles and various chemical agents in the dispersed phase. Oil-based drilling fluid is a drilling fluid with oil as the dispersed phase. Compared with water-based drilling fluid, oil-based drilling fluid has better temperature resistance, strong anti-pollution ability, good lubricity, and strong inhibition, which is conducive to maintaining the wellbore wall. stability. As the number of wells drilled in complex formations increases, the need for oil-based drilling fluid systems also increases. [0003] In the process of conventional drilling, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/32C08F212/08C08F220/14C08F220/18C08F230/08C08F212/10C08F220/44
CPCC08F212/08C08F212/10C09K8/03C09K8/32C09K2208/18C08F220/14C08F220/1804C08F230/085C08F220/1812C08F220/44C08F220/1818
Inventor 黄贤斌李明孙金声吕开河刘敬平金家锋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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