CN106811186B - A kind of acidification blocking remover - Google Patents
A kind of acidification blocking remover Download PDFInfo
- Publication number
- CN106811186B CN106811186B CN201710020278.9A CN201710020278A CN106811186B CN 106811186 B CN106811186 B CN 106811186B CN 201710020278 A CN201710020278 A CN 201710020278A CN 106811186 B CN106811186 B CN 106811186B
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- Prior art keywords
- acid
- agent
- acidification
- detergent
- blocking remover
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The present invention relates to a kind of acidification blocking removers.Mainly solve the problems, such as that existing de-plugging agent is poor for area acid treatment of oil formation effect farther out.The acidification blocking remover, its component and proportion are as follows by weight percentage: inorganic acid 1-30%, organic acid 0.5-2.0%, complexing agent 0.5-2.0%, detergent 0.5-1.5%, corrosion inhibiter 0.5-1.5%, clay stabilizer 1-3%, demulsifier 0.3-0.5%, bleeding agent 0.3-0.5%, mutual solvent 0.3%-2%, surfactant 0.1-0.5%, surplus are water.The acidification blocking remover is long for area acid treatment of oil formation validity period farther out, acidification plugging removal effect is good.
Description
Technical field
The present invention relates to a kind of inorganic agent in oil extraction in oil field technical field, especially a kind of acidification blocking remover and its preparation side
Method.
Background technique
It can be caused under permeability because a variety of causes in production process causes oil layer blocking in oil extraction process
Drop, yield decline.In order to guarantee the normal exploitation in oil field, restores or increase the permeability on stratum, realize oil-water well volume increase and increase
Note, it is necessary to de-plugging be carried out to the contamination and plugging of oil reservoir, the blocking of oil reservoir is released, improve reservoir permeability.
It is that (hydrochloric acid, hydrofluoric acid are formulated mixed by a certain percentage for hydrochloric acid and mud acid that conventional acidulation block releasing technique, which relies primarily on,
Close liquid) acidification stratum, fast to reservoir rock corrosion speed, sour depletion rate is fast, but can only be acidified and imitate near wellbore zone
Fruit is good, and treatment radius is small, can only release the pollution of near wellbore zone, and cannot release the oil layer pollution blocking in area farther out, acidification
Effect is poor, is also easy to produce the new pollution such as secondary precipitation, and validity period is short.
Summary of the invention
The invention reside in overcome existing de-plugging agent present in background technique for area acid treatment of oil formation effect farther out difference
Problem, and a kind of acidification blocking remover is provided.The acidification blocking remover, acidification de-plugging long for area acid treatment of oil formation validity period farther out
Effect is good.
The present invention solves the problems, such as that it can reach by following technical solution: the acidification blocking remover, and component and proportion are pressed
Weight percent is as follows: inorganic acid 1-30%, organic acid 0.5-2.0%, complexing agent 0.5-2.0%, detergent 0.5-1.5%, inhibition
Agent 0.5-1.5%, clay stabilizer 1-3%, demulsifier 0.3-0.5%, bleeding agent 0.3-0.5%, mutual solvent 0.3%-2%, surface are living
Property agent 0.1-0.5%, surplus is water.
The inorganic acid is hydrochloric acid, hydrofluoric acid, one or more mixtures in nitric acid powder；Organic acid is acetic acid, lemon
One or two kinds of mixtures in acid；Complexing agent is ethanedioic acid tetraacethyl disodium；Corrosion inhibiter is YXH-1 type corrosion inhibiter, is suitable for salt
Acid, mud acid, nitric acid, acetic acid, citric acid；Demulsifier is SP-169 type demulsifier, i.e. octadecanol polyethylene oxide polyoxypropylene
Ether；Detergent is TCZ-1 detergent；Mutual solvent is butyl glycol ether and methanol；Surfactant is fluorocarbon surfactant；It seeps
Saturating agent is JFC type bleeding agent, i.e. C7~C9Mixed fatty alcohol polyethylene oxide ether.
The preparation method of acidification blocking remover: a variety of inorganic acids, organic acid, complexing agent, inhibition are sequentially added in water first
Agent, clay stabilizer, demulsifier；After mixing evenly plus successively detergent, bleeding agent, mutual solvent；It is eventually adding surfactant
This product is made.
The acidification blocking remover increases nitric acid, organic acid, bleeding agent, detergent than conventional acidification blocking remover, to mention
The dissolution rate of high dirt and formation blockage object, does not generate secondary precipitation；Surfactant is added, bleeding agent can increase the effective of acid solution
Operating distance realizes the purpose of earth formation deep acidification；Reaction speed is reduced, to extend the effective reaction time of acid, increases function
Effect；It can be by reducing the surface tension between acid solution and rock, the wetability of adjustment rock and acid solution contact surface can be effectively
Realize the row of returning of residual acid solution；Breaker component, which is added, can prevent from mixing the emulsion blocking generated with formation fluid because of de-plugging agent
Stratum can reduce and return exclusion power；Product itself has the function of stabilizer, can be effectively prevented the production of indissoluble hydroxide
It is raw, avoid new pollution and blocking；The complexing energy that complexing agent, the organic acid of addition have polyvalent metal ion in solution
Power has very strong adsorption capacity to all polycations, can inhibit sandstone acidizing secondary precipitation；The inhibition for being directed to a variety of acid is added
Agent, with good corrosion inhibiting ability, corrosion rate can under 90 DEG C, normal pressure, N80 steel disc, the stringent test condition such as 4 hours
Reach 2g/m2H is hereinafter, be much smaller than 8g/m2H(Oil and Natural Gas Corporation professional standard).The oil-water well that can reduce acid solution is set
Standby corrosion.
The present invention can have the following beneficial effects: the acidification blocking remover compared with above-mentioned background technique, for stratum and
Formation blockage object has stronger solvability, and can carry out deep formation acidification.The product does not destroy formation skeleton, will not be right
Secondary pollution is caused on stratum, the percolation ability for having the characteristics that Low Damage, improving oil reservoir.It is acidified validity period length, acidification de-plugging effect
Fruit is good.Can be used for bringing in a well de-plugging, old well blowdown de-plugging.The acidification blocking remover increases permeability, improve tar productivity and
Water injection rate.
Specific embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1:
Hydrochloric acid 100g, hydrofluoric acid 25g, nitric acid powder 10g, acetic acid 5g, citric acid 5g are sequentially added in 316g water first,
B diammonium disodium edta 2.5g, corrosion inhibiter 5g, clay stabilizer 5g, SP-169 demulsifier 2.5g, after mixing evenly plus according to
Secondary detergent 7.5g, JFC bleeding agent 2.5g, butyl glycol ether 2.5g, methanol 10g are eventually adding non-ion fluorin carbon surface active
Acidification blocking remover product 500g is made in agent 1.5g.Test surfaces tension: 17mN/m, demulsification efficiency: 94%, corrosion rate: 0.98 g/
m2·h。
Embodiment 2:
Hydrochloric acid 125g, hydrofluoric acid 35g, nitric acid powder 15g, acetic acid 5g, citric acid 5g are sequentially added in 275g water first,
B diammonium disodium edta 2.5g, corrosion inhibiter 6g, clay stabilizer 5g, SP-169 demulsifier 2.5g, after mixing evenly plus according to
Secondary detergent 7.5g, JFC bleeding agent 2.5g, butyl glycol ether 2.5g, methanol 10g are eventually adding non-ion fluorin carbon surface active
Acidification blocking remover product 500g is made in agent 1.5g.Test surfaces tension: 17mN/m, demulsification efficiency: 95%, corrosion rate: 1.2 g/
m2·h。
Corrosion inhibiter used in embodiment is the model YXH-1 inhibition of Shandong Binzhou Yu Cheng Chemical Industry Science Co., Ltd production
Agent；Detergent is the model TCZ-1 detergent of Shandong Binzhou Yu Cheng Chemical Industry Science Co., Ltd production；JFC bleeding agent is Shen
The production of Yang Mingyang anti-corrosion research institute.
The acidification blocking remover of above-described embodiment 1-2 preparation measures indices as it can be seen that surface tension is low: surface-active is added
Agent, bleeding agent increase the purpose, it can be achieved that earth formation deep acidification to the EFFECTIVE RANGE of acid solution；Acid liquid reaction speed can be reduced
Degree increases effect to extend the effective reaction time of acid；It can also be adjusted by reducing the surface tension between acid solution and rock
The wetability of whole rock and acid solution contact surface can effectively realize the row of returning of residual acid solution；Demulsification efficiency is high: breaker component is added can
It prevents from mixing the emulsion blocking stratum generated with formation fluid because of de-plugging agent, can reduce and return exclusion power；Corrosion rate is small: can
To reduce corrosion of the acidification blocking remover to oil-water well equipment.The acidification blocking remover of embodiment preparation measures indices and meets
Evaluation index.Well below evaluation index, demulsification efficiency is much higher than evaluation index for surface tension and corrosion rate.The acidification de-plugging
The evaluation index of each project of agent is shown in Table 1.
The acidification of table 1 evaluation index of de-plugging agent projects
| Project | Index |
| Surface tension, mN/m≤ | 30 |
| Corrosion rate, g/m2·h ≤ | 5 |
| Demulsification efficiency, % >= | 90 |
Claims (1)
1. a kind of acidification blocking remover, it is characterised in that: its component and proportion are as follows by weight percentage: inorganic acid 1-30%, it is organic
Sour 0.5-2.0%, complexing agent 0.5-2.0%, detergent 0.5-1.5%, corrosion inhibiter 0.5-1.5%, clay stabilizer 1-3%, demulsification
Agent 0.3-0.5%, bleeding agent 0.3-0.5%, mutual solvent 0.3%-2%, surfactant 0.1-0.5%, surplus are water；It is described inorganic
Acid is the mixture of hydrochloric acid, hydrofluoric acid, nitric acid powder；Organic acid is the mixture of acetic acid, citric acid；Complexing agent is ethanedioic acid four
Acetic acid disodium；Corrosion inhibiter is YXH-1 type corrosion inhibiter；Demulsifier is octadecanol polyethylene oxide polyethenoxy ether；Detergent is
TCZ-1 detergent；Mutual solvent is butyl glycol ether and methanol；Surfactant is fluorocarbon surfactant；Bleeding agent be C7~
C9 mixed fatty alcohol polyethylene oxide ether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710020278.9A CN106811186B (en) | 2017-01-12 | 2017-01-12 | A kind of acidification blocking remover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710020278.9A CN106811186B (en) | 2017-01-12 | 2017-01-12 | A kind of acidification blocking remover |
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| CN106811186A CN106811186A (en) | 2017-06-09 |
| CN106811186B true CN106811186B (en) | 2019-04-16 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108048071B (en) * | 2018-01-12 | 2021-01-26 | 中国海洋石油集团有限公司 | Chemical yield increasing liquid for low-permeability reservoir and preparation method thereof |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
| CN109796952A (en) * | 2019-03-28 | 2019-05-24 | 曹高维 | A kind of compound anti-salt production method for salt de-plugging anti-in pit shaft |
| CN110005385A (en) * | 2019-04-09 | 2019-07-12 | 延安顺盈石油工程技术服务有限公司 | A kind of pit shaft and reservoir blockages relieving process |
| CN109913192A (en) * | 2019-04-09 | 2019-06-21 | 天津市擎华能源技术有限责任公司 | Desalination de-plugging agent |
| CN110055043A (en) * | 2019-05-17 | 2019-07-26 | 西安奥德石油工程技术有限责任公司 | Multistage targeting Compound-acid and preparation method thereof |
| CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
| CN112048292B (en) * | 2020-08-17 | 2023-02-28 | 中海油田服务股份有限公司 | Blockage removing liquid and application thereof |
| CN115873572A (en) * | 2022-12-10 | 2023-03-31 | 庆阳华宇石油工程技术有限公司 | Deep penetration cleaning retarding acid deblocking agent and acidification deblocking method |
| CN116200178A (en) * | 2023-01-17 | 2023-06-02 | 中国海洋石油集团有限公司 | Reservoir reconstruction liquid and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102250602B (en) * | 2011-05-06 | 2013-06-26 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CN102775980B (en) * | 2012-07-17 | 2014-07-02 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN103013489A (en) * | 2012-12-17 | 2013-04-03 | 中国石油天然气股份有限公司 | Acidation blocking remover and preparation method thereof |
| CN104653164B (en) * | 2013-11-22 | 2018-07-13 | 中国石油天然气股份有限公司 | A kind of low pressure bottom water reservoir oil well control blockage method for increasing |
| CN103694979B (en) * | 2013-12-12 | 2016-06-08 | 中国石油天然气股份有限公司 | A kind of MH acid composition and application thereof |
| CN104232041B (en) * | 2014-08-19 | 2017-07-25 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of oil-water well strong corrosion acidifying unblocking liquid of low leak-off and preparation method thereof |
| CN105482801A (en) * | 2015-11-25 | 2016-04-13 | 中国海洋石油总公司 | Oil and water well polyacid blocking remover |
| CN105505360B (en) * | 2015-12-28 | 2018-11-16 | 中国石油化工股份有限公司 | A kind of fluoboric acid de-plugging agent and acidification method for removing blockage |
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