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Micro-nano viscosity-reducing plugging agent for oil-based drilling fluid and preparation method of micro-nano viscosity-reducing plugging agent

An oil-based drilling fluid, micro-nano technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve the effects of increasing demulsification voltage, reducing surface roughness, and reducing high-temperature and high-pressure filtration loss

Active Publication Date: 2022-01-18
山东得顺源石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Petroleum resin, as a common chemical product in recent years, can be widely used in rubber, adhesives, coatings, papermaking, ink, etc. industries and fields, but rarely used in the field of drilling fluids

Method used

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  • Micro-nano viscosity-reducing plugging agent for oil-based drilling fluid and preparation method of micro-nano viscosity-reducing plugging agent
  • Micro-nano viscosity-reducing plugging agent for oil-based drilling fluid and preparation method of micro-nano viscosity-reducing plugging agent
  • Micro-nano viscosity-reducing plugging agent for oil-based drilling fluid and preparation method of micro-nano viscosity-reducing plugging agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation:

[0029] Petroleum resin: 38 parts of C9 petroleum resin; organic acid: 15 parts of methacrylic acid; crosslinking agent: 0.5 part of γ-(methacryloyloxy)propyltrimethoxysilane; emulsifier: sorbitan oleate 6 parts; initiator: 0.6 parts of dibenzoyl peroxide; first solvent: 25 parts of acetone; second solvent: mineral spirits D100: 110 parts.

[0030] Processing:

[0031] Step 1) Weigh the petroleum resin and the first solvent in a three-necked flask, and dissolve at 130°C for 1 hour;

[0032] Step 2) Continue to add emulsifier and mix for 20 minutes;

[0033] Step 3) At 90°C, pass nitrogen gas into the feed solution obtained in step 2) for 1 hour, then add an initiator, dropwise add an organic acid and a crosslinking agent to obtain a mixed solution;

[0034] Step 4) Add the second solvent to the mixed solution obtained in step 3), stir and disperse at a high speed to obtain the final product.

Embodiment 2

[0036] Preparation:

[0037] Petroleum resin: 10 parts of C5 petroleum resin; organic acid: 5 parts of maleic anhydride; crosslinking agent: 0.25 parts of N,N-methylenebisacrylamide; emulsifier: 3 parts of sorbitan oleic acid triester ; Initiator: 0.2 parts of azobisisobutyronitrile; first solvent: 10 parts of acetone and toluene (mass ratio 3:2); second solvent: 50 parts of white oil 3#.

[0038] Processing:

[0039] Step 1) Weigh the petroleum resin and the first solvent in a three-necked flask, and dissolve at 80°C for 2 hours;

[0040] Step 2) Continue to add emulsifier and mix for 50 minutes;

[0041] Step 3) At 120°C, pass nitrogen gas into the feed solution obtained in step 2) for 30 minutes, then add an initiator, dropwise add an organic acid and a crosslinking agent to obtain a mixed solution;

[0042] Step 4) Add the second solvent to the mixed solution obtained in step 3), stir and disperse at a high speed to obtain the final product.

Embodiment 3

[0044] Petroleum resin: 24 parts of C5 / C9 copolymer resin; organic acid: 12.5 parts of methylbutenedioic acid; crosslinking agent: 0.2 parts of vinyl tris (β-methoxyethoxy) silane; emulsifier: sorbitol anhydride 3.5 parts of oleic acid ester and alkylphenol polyoxyethylene ether-10 (mass ratio 5:2); initiator: 0.5 parts of azobisisoheptanonitrile; first solvent: 17.5 parts of ethyl acetate; second solvent: white Oil 15#90 parts.

[0045] Processing:

[0046] Step 1) Weigh the petroleum resin and the first solvent in a three-necked flask, and dissolve at 120°C for 1 hour;

[0047] Step 2) Continue to add emulsifier and mix for 35 minutes;

[0048] Step 3) At 105°C, pass nitrogen gas into the feed solution obtained in step 2) for 30 minutes, then add an initiator, dropwise add an organic acid and a crosslinking agent to obtain a mixed solution;

[0049] Step 4) Add the second solvent to the mixed solution obtained in step 3), stir and disperse at a high speed to obtain the fi...

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Abstract

The invention relates to the technical field of drilling fluid treating agents, and discloses a micro-nano viscosity-reducing plugging agent for oil-based drilling fluid and a preparation method of the micro-nano viscosity-reducing plugging agent. The viscosity-reducing plugging agent is prepared from petroleum resin, organic acid, a cross-linking agent, an emulsifier, an initiator, a first solvent and a second solvent. The preparation method comprises the steps of dissolving petroleum resin in a first solvent; adding an emulsifier and mixing; introducing nitrogen into the feed liquid, adding an initiator, and dropwise adding organic acid and a cross-linking agent to obtain a mixed solution; and adding a second solvent, and stirring and dispersing at a high speed to obtain a final product. The product can effectively reduce the high-temperature and high-pressure filter loss and adjust the rheological property, and is good in temperature resistance; friction and wear coefficients are reduced; the viscosity of the system is reduced; and the demulsification voltage of the system is improved.

Description

technical field [0001] The invention relates to the technical field of drilling fluid treatment agents, in particular to a micro-nano viscosity reducing plugging agent for oil-based drilling fluid and a preparation method thereof. Background technique [0002] In recent years, the difficulty of drilling has gradually increased, and the exploitation of unconventional oil and gas has continued to increase, followed by the increasing difficulty of drilling. Because oil-based drilling fluids have better inhibition and lubrication capabilities than water-based drilling fluids, the frequency of oil-based drilling fluids is gradually increasing. Micro-fractures are commonly developed in shale, and the oil-based drilling fluid filtrate seeps into the micro-fractures under the action of pressure difference, which destroys the pressure balance of the borehole wall, thus leading to the instability of the borehole wall. As an important component of the oil-based drilling fluid system, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/03C09K8/32C09K8/42C09K8/512C08F289/00C08F220/06C08F230/08C08F222/06C08F222/38C08F222/02C08F2/30
CPCC09K8/035C09K8/03C09K8/32C09K8/426C09K8/512C08F289/00C08F2/30C09K2208/10C09K2208/12C09K2208/34C08F220/06C08F230/085C08F222/06C08F222/385C08F222/02
Inventor 郭东荣赵波李文明康乃静刘相兴缪江玉王海锋臧运刚李红蕾高士鲁陈亚飞林海萍李晓静
Owner 山东得顺源石油科技有限公司
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