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Comprehensive treating agent for water injection well and preparation method of comprehensive treating agent

A comprehensive treatment agent, water injection well technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc. The effect of safe transportation and strong wax removal and anti-wax performance

Active Publication Date: 2015-09-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor wax removal effect of the existing chemical wax remover and preventive agent in the background technology, which cannot solve the problem of water injection well blockage, the present invention provides a comprehensive treatment agent for water injection well, which has a large specificity, strong wax melting ability, and The functions of clearing, preventing wax and sterilizing and antiscaling can well solve the problem of blockage of water injection wells

Method used

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  • Comprehensive treating agent for water injection well and preparation method of comprehensive treating agent

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Experimental program
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Effect test

Embodiment 1

[0018] 85% compound organic solvent, 2% EVA220 (molecular weight is about 8500), 3% mixture of AR-36 and Tween-80 (mass ratio is 2:1), 10% methanol; sterilizing and antiscaling parts: 90% water , a mixture of 4% amino trimethylene phosphoric acid and polyaspartic acid (mass ratio is 1:1), a mixture of 5% O-30 and Span-65 (mass ratio is 3:1), 1% A mixture of dodecyldimethylbenzyl ammonium chloride and isothiazolinone (mass ratio 1:2).

[0019]Add xylene, cyclohexane, and petroleum ether into the container at a volume ratio of 3:1:4, and stir evenly to obtain a composite solvent. Subsequently, first add methanol in proportion to the composite organic solvent, and after stirring evenly, continue to add EVA220. After completely dissolving at 45°C, add a non-ionic surfactant and stir evenly to obtain the wax-removing part. At the same time, add the compound bactericide and antiscalant into the water in sequence, and after stirring evenly, continue to add emulsifier, and stir at a...

Embodiment 2

[0022] 80% composite organic solvent, 5% EVA230 (molecular weight around 9000), 5% mixture of AR-36 and Tween-80 (mass ratio is 2:1), 10% ethylene glycol monobutyl ether and ethanol mixture ( The mass ratio is 2:3); the sterilization and antiscaling part: 85% water, 3% mixture of amino trimethylene phosphoric acid and polyaspartic acid (mass ratio is 1:1), 10% O-30 and A mixture of Span-65 (mass ratio 3:1), a mixture of 2% dodecyldimethylbenzyl ammonium chloride and isothiazolinone (mass ratio 1:2). The specific preparation method is the same as above, wherein the stirring speed after adding the emulsifier is 80r / min; the stirring speed of the cleaning and anti-scaling parts mixed with the sterilization and anti-scaling parts is 300r / min.

Embodiment 3

[0024] 90% composite organic solvent, 2% EVA40W (molecular weight about 10000), 3% compound of AR-36 and Tween-80 (mass ratio 2:1), 5% isopropanol; bactericidal and anti-scaling parts: 87% water, 5% mixture of aminotrimethylene phosphoric acid and polyaspartic acid (mass ratio is 1:1), 7% mixture of O-30 and Span-65 (mass ratio is 3:1), 1% mixture of dodecyl dimethyl benzyl ammonium chloride and isothiazolinone (mass ratio 1:2). The specific preparation method is the same as above, wherein the stirring speed after adding the emulsifier is 100r / min; the stirring speed of the cleaning and anti-scaling parts mixed with the sterilization and anti-scaling parts is 500r / min.

[0025] Implementation Effect:

[0026]

[0027] The present invention has reached following beneficial effect through above-mentioned embodiment:

[0028] 1. The wax melting rate is fast, reaching 0.0278g / min; the wax preventing rate is high, 71.24%;

[0029] 2. The scale inhibition effect on calcium car...

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Abstract

The invention relates to a comprehensive treating agent for a water injection well and a preparation method of the comprehensive treating agent, and particularly relates to a comprehensive treating agent for chemically washing a water injection well to remove substances such as a filter material, chemical reaction precipitates, impurities, dead oil, paraffin and water scales. The comprehensive treating agent for the water injection well comprises a paraffin removal and control part and a sterilizing and anti-scale part. The comprehensive treating agent is characterized by comprising the following components by weight percent: the paraffin removal and control part: 80 to 90 percent of a composite organic solvent, 2 to 5 percent of ethylene-vinyl acetate, 3 to 5 percent of a non-ionic surfactant, and 5 to 15 percent of a mutual solvent, wherein the sum of weight percentages of all components is 100 percent; the sterilizing and anti-scale part: 85 to 90 percent of water, 3 to 5 percent of a composite anti-scale agent, 5 to 10 percent of a composite emulsifier, and 1 to 2 percent of a composite sterilizing agent, wherein the sum of weight percentages of all components is 100 percent; the weight ratio of the paraffin removal and control part to the sterilizing and anti-scale part is 3:1. The comprehensive treating agent has a paraffin removal and control function and an anti-scale and sterilizing function, is based on the organic solvent and is assisted by the emulsifier paraffin control and is wide in applicability.

Description

Technical field: [0001] The present invention relates to a preparation formula and preparation method of a comprehensive treatment agent for water injection wells, especially a preparation method for chemical well cleaning of water injection wells to remove filter materials, chemical reaction sediments, impurities, dead oil, paraffin, scale and other substances. A comprehensive treatment agent. Background technique: [0002] At present, the wellbore of the water injection well in the oil field is blocked due to wax deposits, scaling, and the proliferation of sulfate-reducing bacteria during the water injection production process. It is impossible to carry out routine testing and deployment of water injection, which has caused great difficulties in daily production. Since the blockage contains a large amount of wax deposits, scale, and sulfate-reducing bacteria, the conventional treatment methods include large-volume well washing, hot washing, mechanical wax removal, chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/528C09K8/54
CPCC09K8/524C09K8/528C09K8/54C09K2208/12C09K2208/32
Inventor 熊金平王毛毛熊青昀
Owner BEIJING UNIV OF CHEM TECH
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