Composite acidic blocking remover for oil well

A technology of compound acid and plugging agent, which is applied in wellbore/well parts, drilling composition, earthwork drilling and production, etc., can solve problems such as bottom layer damage, oil well production reduction, water well under-injection, etc., so as to facilitate popularization and application, Good anti-corrosion effect and low component cost

Inactive Publication Date: 2017-03-01
王娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the process of drilling, oil testing, well workover and oil production, drilling fluid, well killing fluid, injected water and polymers and other liquids that enter the well will cause damage to the bottom layer, resulting in blockage of oil and gas production channels, resulting in production reduction or shutdown of oil wells, and water well failure. Note

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0012] In terms of parts by mass, it includes the following components: 10 parts of hydrochloric acid, 2.5 parts of diatomaceous earth, 3 parts of bentonite, 4 parts of clay stabilizer, 12 parts of nano silicon dioxide, 20 parts of acetic acid, 2.1 parts of nitric acid, 25 parts of glass fiber, 8 parts of methyl methacrylate, 5 parts of polyoxyethylene alkyl alcohol ether.

Embodiment approach 2

[0014] In terms of parts by mass, it includes the following components: 15 parts of hydrochloric acid, 4.2 parts of diatomaceous earth, 9 parts of bentonite, 13 parts of clay stabilizer, 18 parts of nano silicon dioxide, 35 parts of acetic acid, 3.6 parts of nitric acid, 40 parts of glass fiber, 15 parts of methyl methacrylate, 10 parts of polyoxyethylene alkyl alcohol ether.

Embodiment approach 3

[0016] In terms of parts by mass, it includes the following components: 12 parts of hydrochloric acid, 3.2 parts of diatomaceous earth, 5 parts of bentonite, 6 parts of clay stabilizer, 13 parts of nano silicon dioxide, 25 parts of acetic acid, 2.6 parts of nitric acid, 30 parts of glass fiber, 9 parts of methyl methacrylate, 6 parts of polyoxyethylene alkyl alcohol ether.

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PUM

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Abstract

The invention especially relates to a composite acidic blocking remover for an oil well, belonging to the technical field of blocking removers. The composite acidic blocking remover comprises, by mass, 10 to 15 parts of hydrochloric acid, 2.5 to 4.2 parts of diatomite, 3 to 9 parts of bentonite, 4 to 13 parts of a clay stabilizing agent, 12 to 18 parts of nanometer silica, 20 to 35 parts of acetic acid, 2.1 to 3.6 parts of nitric acid, 25 to 40 parts of glass fiber, 8 to 15 parts of methyl methacrylate and 5 to 10 parts of polyoxyethylene alkyl alcohol ether. With such a formula, the composite acidic blocking remover for the oil well has good anticorrosion effect and can both remove blocking and cleaning the oil well; moreover, the components of the composite acidic blocking remover are low in cost and friendly to environment, so the composite acidic blocking remover is easy to promote and apply.

Description

technical field [0001] The invention relates to the technical field of plugging agents, in particular to a composite acid plugging agent for oil wells. Background technique [0002] The oil extraction industry is a complex system engineering, and keeping the oil and water wells unimpeded is the central link of the oil extraction engineering. During the process of drilling, oil testing, well workover and oil production, drilling fluid, well killing fluid, injected water and polymers and other liquids that enter the well will cause damage to the bottom layer, resulting in blockage of oil and gas production channels, resulting in production reduction or shutdown of oil wells, and water well failure. Note. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an oil well compound acid plugging remover. [0004] In order to solve the above-mentioned technical problems, a compound acid plugging agent for oil wells of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52C09K8/54
CPCC09K8/52C09K8/54
Inventor 王娟
Owner 王娟
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