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Thermosensitive resin inhibition plugging agent for drilling fluid and preparation method thereof

A drilling fluid and plugging agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low temperature resistance and strength, large particle size of plugging materials, insensitivity to heat, etc., and achieve good performance. , the effect of reducing plastic viscosity and high sensitivity

Pending Publication Date: 2020-03-17
四川巨力源能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a heat-sensitive resin for drilling fluid to inhibit the plugging material from the problems of large particle size, insensitivity to heat sensitivity, low temperature resistance and strength performance and poor stability in the prior art. Plugging agent and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preferred embodiment of the present invention provides a method for preparing a heat-sensitive resin inhibiting plugging agent for drilling fluid. The specific steps are as follows:

[0033] S1. Add 12g of methylphenylpolysiloxane into dichloromethane solvent, stir in an ice bath, add 100g of acryloyl chloride at the same time, heat up to 35°C for 1 hour, wash and dry to obtain product A;

[0034] S2. Soak the bentonite in 2mol / L sodium hydroxide solution for 3 hours at 300°C, and dry to obtain treated bentonite;

[0035] S3. Add 30 g of treated bentonite to 100 g of product A, then add 5 g of 0.3 g / L sodium carbonate solution, 12 g of sodium lauryl sulfate and 12 g of nonylphenol polyoxyethylene ether, and stir at 85° C. for 10 min to obtain product B ;

[0036] S4. Add 1 g of azobisisobutyronitrile to 10 g of product B, heat at 85°C for 3 hours, cool to 35°C, adjust the pH to 7.5 with ammonia water, and dry to obtain the product.

Embodiment 2

[0038] The preferred embodiment of the present invention provides a method for preparing a heat-sensitive resin inhibiting plugging agent for drilling fluid. The specific steps are as follows:

[0039] S1. Add 10g of methylphenyl polysiloxane into dichloromethane solvent, stir in an ice bath, add 80g of acryloyl chloride at the same time, heat up to 35°C for 1 hour, wash and dry to obtain product A;

[0040] S2. Soak the bentonite in 1.5mol / L sodium hydroxide solution for 4 hours at 300°C, and dry to obtain the treated bentonite;

[0041] S3. Add 40 g of treated bentonite to 100 g of product A, then add 4 g of 0.3 g / L sodium carbonate solution, 11 g of sodium lauryl sulfate and 11 g of nonylphenol polyoxyethylene ether, and stir at 85° C. for 10 min to obtain product B ;

[0042] S4. Add 0.8 g of azobisisobutyronitrile to 10 g of product B, keep the temperature at 85° C. for 3 hours, cool to 35° C., adjust the pH to 7.5 with ammonia water, and dry to obtain the product.

Embodiment 3

[0044] The preferred embodiment of the present invention provides a method for preparing a heat-sensitive resin inhibiting plugging agent for drilling fluid. The specific steps are as follows:

[0045] S1. Add 15g of methylphenylpolysiloxane into dichloromethane solvent, stir in an ice bath, add 120g of acryloyl chloride at the same time, heat up to 35°C for 1 hour, wash and dry to obtain product A;

[0046] S2. Soak the bentonite in 2mol / L sodium hydroxide solution for 3 hours at 300°C, and dry to obtain treated bentonite;

[0047] S3. Add 45g of treated bentonite to 120g of product A, then add 5g of 0.2g / L sodium carbonate solution, 14g of sodium lauryl sulfate and 14g of nonylphenol polyoxyethylene ether, and stir at 85°C for 10min to obtain product B ;

[0048] S4. Add 1 g of azobisisobutyronitrile to 10 g of product B, heat at 85°C for 3 hours, cool to 35°C, adjust the pH to 7.5 with ammonia water, and dry to obtain the product.

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Abstract

The invention discloses a thermosensitive resin inhibition plugging agent for drilling fluid and a preparation method thereof. The method comprises the steps of: performing modification treatment fororganic siloxane, and mixing treated bentonite to obtain an inhibition plugging agent for drilling fluid. The obtained inhibition plugging agent is high in sensitivity, good in temperature resistanceand high in strength, the affinity of the resin system is changed under the action of heat, the distance between fine liquid drops in the drilling fluid system and other oil-soluble dispersant particles is increased, the plastic viscosity of the drilling fluid is reduced, hydration expansion of clay is inhibited, the low-temperature low-pressure closed filtration loss and the high-temperature high-pressure permeation filtration loss are low, and the inhibition and plugging performance of the drilling fluid is improved.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid plugging agents, and in particular relates to a heat-sensitive resin inhibiting plugging agent for drilling fluids and a preparation method thereof. Background technique [0002] The increasingly complex geological conditions in the process of oil and gas exploration and development put forward higher requirements for the stability of the well wall. During the drilling process, the drilling fluid filtrate easily enters the formation through tiny pores under the action of the pressure difference. The transfer effect in the micro-fractures causes the development of fractures, which makes the stability of the wellbore wall worse, and in severe cases, it leads to drilling accidents such as wellbore collapse. [0003] Borehole wall instability is a major engineering problem that has plagued the drilling industry for many years and has yet to be solved. Well wall instability will lead to a serie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/32C09K8/502
CPCC09K8/03C09K8/32C09K8/502
Inventor 刘洋
Owner 四川巨力源能源科技有限公司
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