Salt and blockage remover

A technology of plugging agent and salt solution, applied in drilling composition, chemical instruments and methods, etc., can solve the problems of untimely liquid drainage, reservoir damage, blockage, etc., to prevent secondary precipitation and inhibit expansion and migration. Effect

Inactive Publication Date: 2019-06-21
天津市擎华能源技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is proposed in order to overcome the disadvantages of inorganic acid acidification in the prior art, such as blockage caused by secondary pre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A desalting and plugging removal agent, the composition and mass percentage of the desalting and plugging removal agent are:

[0056] Chelating agent 75%;

[0057] Penetrant 10%;

[0058] Inhibitor 9%;

[0059] Mutual solvent 5%;

[0060] Multi-component high-efficiency corrosion inhibitor 1%.

Embodiment 2

[0062] A desalting and plugging removal agent, the composition and mass percentage of the desalting and plugging removal agent are:

[0063] Chelating agent 78%;

[0064] Penetrant 8%;

[0065] Inhibitor 8%;

[0066] Mutual solvent 5%;

[0067] Multi-component high-efficiency corrosion inhibitor 1%.

Embodiment 3

[0069] A desalting and plugging removal agent, the composition and mass percentage of the desalting and plugging removal agent are:

[0070] Chelating agent 80%;

[0071] Penetrant 9%;

[0072] Inhibitor 5%;

[0073] Mutual solvent 5%;

[0074] Multi-component high-efficiency corrosion inhibitor 1%.

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PUM

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Abstract

The invention discloses salt and blockage remover which consists of a high-efficiency compound complexing agent, a high-efficiency penetrating agent, an inhibitor, a mutual solvent, a multi-componenthigh-efficiency corrosion inhibitor and other components. The salt and blockage remover is a non-toxic and harmless pure organic green and environmentally-friendly product, has a strong inorganic scale corrosion ability and can interact with silicoaluminate aiming at inorganic material blockage in an oil-gas well and a water injection well to form soluble chelates and play a role in dissolving clay-like minerals; the salt and blockage remover can form a stable water soluble matter with Ca<2+>, Mg2<2+> and other ions to remove the blockage caused by inorganic scales; the salt and blockage remover can form a stable complexing system with iron ions to prevent secondary precipitation; the salt and blockage remover can interact with the clay-like minerals, inhibit the clay swelling migration and dissolve calcium sulfate, barium sulfate, strontium sulfate and other scales incapable of being dissolved by a strong acid system, thereby comprehensively removing the inorganic matter blockage andachieving the purpose of salt and blockage removal.

Description

technical field [0001] The invention belongs to an auxiliary agent for oil exploitation, and in particular relates to a desalting and plugging-removing agent. Background technique [0002] Acidizing technology is one of the main measures for the commissioning and stimulation of oil and gas wells and water injection wells. Acidizing is to dissolve various solid phase particles in the formation near the wellbore during drilling, completion, workover, water injection, and incremental injection through the flow and reaction of acid liquid in the intercrystals, cavities, and micro-fractures of the formation pores. It is a technology to remove the damage to the formation permeability and dredge the permeation channel of the fluid, so as to restore and improve the production capacity of the oil well. At present, the conventional acidification technology adopts inorganic acid acidification, which has the disadvantages of blockage caused by secondary precipitation, insufficient pene...

Claims

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Application Information

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IPC IPC(8): C09K8/528
Inventor 胡俊涛李伟亭
Owner 天津市擎华能源技术有限责任公司
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