Oil-based asphalt resin anti-collapse agent and preparation method thereof

A technology of asphalt resin and anti-slump agent, applied in the field of petroleum additives, can solve the problems of poor plugging and anti-slump effect of anti-slump agent, poor anti-salt performance of anti-slump agent, well collapse, etc. Salt performance, the effect that is conducive to construction

Active Publication Date: 2022-03-01
北京宏勤石油助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salt resistance of sulfonated asphalt anti-slump agent is poor, and with the increase of drilling depth, the pressure and temperature of the bottom layer also increase. Under the condition of high temperature, a certain plastic flow deformation will be generated, which will cause the problem of well collapse, resulting in poor plugging and anti-collapse effect of the anti-slump agent under high temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of an oil-based asphalt resin anti-slump agent, comprising the following steps:

[0038] 20kg of asphalt and 25kg of oleum were mixed and reacted for 80min at a reaction temperature of 60°C, then 20kg of petroleum resin was added and stirred, then 5kg of water-soluble starch, 8kg of acrylamide, 6kg of cross-linking agent and 10kg of lignite resin and water were added. The addition amount and the addition amount of water-soluble starch are 1:0.3, and the above reaction temperature is kept stirring for 60 minutes to obtain an acidic colloidal solution;

[0039] Then slowly add sodium hydroxide solution to adjust the pH value to 7, then dry and pulverize to obtain the oil-based asphalt resin anti-slump agent.

[0040] Wherein, the cross-linking agent is selected from 2,5-dimethyl-2,5-di-tert-butylperoxyhexane;

[0041] The asphalt is a mixture of natural asphalt and petroleum asphalt with a mass ratio of 1:2.

Embodiment 2

[0043]A preparation method of an oil-based asphalt resin anti-slump agent, comprising the following steps:

[0044] 30kg of asphalt and 30kg of oleum were mixed and reacted for 90min, and the reaction temperature was 55°C, then 30kg of petroleum resin was added and stirred, and then 10kg of water-soluble starch, 10kg of acrylamide, 8kg of cross-linking agent and 20kg of lignite resin and water were added. The addition amount and the addition amount of water-soluble starch are 1:0.5, and the above reaction temperature is kept stirring for 70 minutes to obtain an acidic colloidal solution;

[0045] Then slowly add sodium hydroxide solution to adjust the pH value to 8, then dry and pulverize to obtain the oil-based asphalt resin anti-slump agent.

[0046] Wherein, the crosslinking agent is selected from 2,5-dimethyl-2,5-di-tert-butylperoxyhexane and N-methylolacrylamide with a mass ratio of 1:1;

[0047] The asphalt is a mixture of natural asphalt and petroleum asphalt with a ma...

Embodiment 3

[0049] A preparation method of an oil-based asphalt resin anti-slump agent, comprising the following steps:

[0050] 40kg of asphalt and 40kg of oleum were mixed and reacted for 100min, and the reaction temperature was 50°C, then 40kg of petroleum resin was added and stirred, and then 15kg of water-soluble starch, 15kg of acrylamide, 10kg of cross-linking agent and 30kg of lignite resin and water were added. The addition amount and the addition amount of water-soluble starch are 1:0.8, and the above reaction temperature is kept stirring for 80 minutes to obtain an acidic colloidal solution;

[0051] Then slowly add sodium hydroxide solution to adjust the pH value to 9, then dry and pulverize to obtain the oil-based asphalt resin anti-slump agent.

[0052] Wherein, the cross-linking agent selects N-methylolacrylamide;

[0053] Asphalt is a mixture of natural asphalt and petroleum asphalt with a mass ratio of 1:3.

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PUM

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Abstract

The invention relates to the technical field of petroleum auxiliaries, and particularly discloses an oil-based asphalt resin anti-collapse agent and a preparation method thereof.The anti-collapse agent is prepared from, by weight, 20-40 parts of asphalt, 25-40 parts of fuming sulphuric acid, 20-40 parts of petroleum resin, 5-15 parts of water-soluble starch, 8-15 parts of acrylamide, 6-10 parts of cross-linking agent and 10-30 parts of lignite resin; a preparation method of the anti-collapse agent comprises the following steps that asphalt and fuming sulphuric acid are mixed and react, then petroleum resin is added and stirred, then the remaining raw materials and water are added and stirred, then alkali liquor is added to adjust the pH value to be alkalescent, drying and smashing are conducted, and the anti-collapse agent is obtained, and the ratio of the adding amount of water to the adding amount of water-soluble starch is 1: (0.3-0.8). The obtained anti-collapse agent has the characteristics of better high temperature resistance and better salt resistance.

Description

technical field [0001] The application relates to the technical field of petroleum additives, more specifically, it relates to an oil-based asphalt resin anti-slump agent and a preparation method thereof. Background technique [0002] During the drilling process, since more than 75% of the formations encountered in drilling are mud shale, and more than 90% of them will have wellbore stability problems, so the wellbore stability during drilling is an important research content. Wellbore instability mainly includes mechanical instability, hydration cracking of shale caused by drilling fluid filtrate invasion into formation, and easy hydration expansion of clay. The anti-slump agent for drilling fluid, also known as shale inhibitor, can effectively inhibit the hydration expansion and dispersion of shale, fill the cracks in the borehole wall, and stabilize the borehole wall. [0003] There are many types of anti-slumping agents, mainly including inorganic salts, asphalt, etc. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/12
Inventor 曹何山曹红巧卢新玉
Owner 北京宏勤石油助剂有限公司
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