CN1216121C - Acidification blocking remover of sandstone thin difference oil layer compound acid - Google Patents
Acidification blocking remover of sandstone thin difference oil layer compound acid Download PDFInfo
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- CN1216121C CN1216121C CN 03106501 CN03106501A CN1216121C CN 1216121 C CN1216121 C CN 1216121C CN 03106501 CN03106501 CN 03106501 CN 03106501 A CN03106501 A CN 03106501A CN 1216121 C CN1216121 C CN 1216121C
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- acid
- blocking remover
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- acidification blocking
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Abstract
The present invention relates to an acidification blocking remover of composite acid for a sandstone thin and poor oil layer in the chemical yield increase and injection increase field of oil field development. The acidification blocking remover has the formula according to the following weight ratio: the ratio of hydrochloric acid to citric acid to acetic acid to organic phosphoric acid (PBTCA) to ammonium hydrogen difluoride to sodium dodecylbenzene sulfonate to ethanol to organic quaternary ammonium CT-3 to water is 10%: 1%: 5%: 3%: 6%: 1%: 1.5%: 1%: 71.5%. The blocking remover overcomes the defect that the conventional earth acid fluid has high activity, and is easy to form secondary precipitation. Acid fluid has weak activity, low reaction speed and no secondary precipitation. The acidification blocking remover has the advantages that a treatment scale can be enlarged; the permeation performance of the thin and poor oil layer is improved; the chemical yield increase and injection increase problem of the thin and poor oil layer is solved, etc.
Description
Technical field: the present invention relates to oil-field development chemical increasing production augmented injection field, is the compound sour acidification blocking remover of a kind of sandstone thin poor reservoir.
Background technology: the acidifying technology of sandstone hydrocarbon zone mainly is a mud acid, the regular mud acid acidifying is effective for high-permeability pay, but for thin poor reservoir, because low, the poor properties of its rate of permeation, susceptibility clay mineral content height, therefore, existing conventional soil acid acidizing technology is relatively poor for the plugging removal effect of thin difference reservoir, easily forms secondary sedimentation.And compound sour acidification blocking remover is the composite product of multiple acid solution, carries out reservoir blockages relieving and improves the immediate vicinity of wellbore penetrating quality by the characteristic of different acid solutions and the synergy between them.
Summary of the invention: the objective of the invention is to develop a kind of active high drawback that easily forms secondary sedimentation of regular mud acid acid solution that overcomes, the acid solution activity is weak, speed of response is slow, no secondary sedimentation, can enlarge treatment scale, improve the penetrating quality of thin poor reservoir, solve the compound sour acidification blocking remover of sandstone thin poor reservoir of a thin poor reservoir chemical increasing production augmented injection difficult problem.Prescription of the present invention is made up of hydrochloric acid, citric acid, acetate, organic phosphoric acid PBTCA, ammonium bifluoride, Sodium dodecylbenzene sulfonate, ethanol, organic quaternary amine CT-3, water, prescription by its weight ratio is hydrochloric acid: citric acid: acetate: organic phosphoric acid PBTCA: ammonium bifluoride: Sodium dodecylbenzene sulfonate: ethanol: organic quaternary amine CT-3: water=10%: 1%: 5%: 3%: 6%: 1%: 1.5%: 1%: 71.5%.This unblocking agent has overcome the active high drawback that easily forms secondary sedimentation of regular mud acid acid solution, the acid solution activity is weak, speed of response is slow, no secondary sedimentation, have and to enlarge treatment scale, improve the penetrating quality of thin poor reservoir, solve the advantages such as a chemical increasing production augmented injection difficult problem of thin poor reservoir.
Embodiment one: adopt hydrochloric acid 1000kg, citric acid 100kg, acetate 500kg, organic phospho acid (PBTCA) 300kg, ammonium bifluoride 600kg, Sodium dodecylbenzene sulfonate 100kg, ethanol 150kg, organic quaternary amine CT-3 100kg, clear water 7500kg, be made into compound sour acidification blocking remover 10m
3
Embodiment two: adopt hydrochloric acid 2000kg, citric acid 200kg, acetate: 1000kg, organic phospho acid (PBTCA) 600kg, ammonium bifluoride 1200kg, Sodium dodecylbenzene sulfonate 200kg, ethanol 300kg, organic quaternary amine CT-3 200kg, clear water 15000kg, be made into compound sour acidification blocking remover 20m
3
Embodiment three: adopt hydrochloric acid 1200kg, citric acid 120kg, acetate: 600kg, organic phospho acid (PBTCA) 360kg, ammonium bifluoride 720kg, Sodium dodecylbenzene sulfonate 120kg, ethanol 180kg, organic quaternary amine CT-3 120kg, clear water 9780kg, be made into compound sour acidification blocking remover 12m
3
Embodiment four: adopt hydrochloric acid 2400kg, citric acid 240kg, acetate: 1200kg, organic phospho acid (PBTCA) 720kg, ammonium bifluoride 1440kg, Sodium dodecylbenzene sulfonate 240kg, ethanol 360kg, organic quaternary amine CT-3 240kg, clear water 19560kg, be made into compound sour acidification blocking remover 24m
3
The realization mechanism of this unblocking agent is that organic acid and mineral acid combine and form compound acid.When acid solution entered the stratum, mineral acid at first reacted with stratum mineral and contamination and plugging thing soon because of its active big ionization rate; Organic acid is slow because of its active low ionization rate, can enter earth formation deep.Thereby acid solution remains bigger activity in treatment radius, and the entire treatment zone all can be handled preferably, and the de-plugging transformation of finishing reservoir by the synergy of the two reaches the volume increase purpose.This unblocking agent has solved the chemical plugging removal increasing yield and injection problem of present sandstone oil reservoir thin poor reservoir oil and water well.
After injecting this composite acid deblocking agent during site operation, need closing well to react the 16 hours row's of returning raffinates again.Use this unblocking agent and can reach releasing oil reservoir immediate vicinity of wellbore contamination and plugging, improve the purpose of reservoir permeability energy, this blockages relieving fluid not only is fit to oil well production increasing but also be fit to water injection well stimulation.
Claims (1)
1, the compound sour acidification blocking remover of a kind of sandstone thin poor reservoir, form by hydrochloric acid, citric acid, acetate, organic phosphoric acid PBTCA, ammonium bifluoride, Sodium dodecylbenzene sulfonate, ethanol, organic quaternary amine CT-3, water, it is characterized in that prescription by its weight ratio is: hydrochloric acid: citric acid: acetate: organic phosphoric acid PBTCA: ammonium bifluoride: Sodium dodecylbenzene sulfonate: ethanol: organic quaternary amine CT-3: water=10%: 1%: 5%: 3%: 6%: 1%: 1.5%: 1%: 71.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03106501 CN1216121C (en) | 2003-02-25 | 2003-02-25 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03106501 CN1216121C (en) | 2003-02-25 | 2003-02-25 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524922A CN1524922A (en) | 2004-09-01 |
| CN1216121C true CN1216121C (en) | 2005-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03106501 Expired - Lifetime CN1216121C (en) | 2003-02-25 | 2003-02-25 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
Country Status (1)
| Country | Link |
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| CN (1) | CN1216121C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285378B (en) * | 2008-05-09 | 2012-02-01 | 大庆汇联技术开发有限公司 | Activator composite plug removal technology |
| CN101691839B (en) * | 2009-09-30 | 2013-06-26 | 陕西中孚石油技术有限责任公司 | Ultra-low resistance acid-type microemulsion plugging removal and stimulation technology for low permeability oil well |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089118B (en) * | 2006-06-16 | 2011-08-31 | 长江大学 | Acidifying agent composition |
| CN100560682C (en) * | 2007-12-27 | 2009-11-18 | 大庆石油学院 | A kind of bottom hole sedimentation type anti-scaling anti-wax agent |
| CN102061154B (en) * | 2010-12-21 | 2012-12-05 | 大庆百晟石油科技有限公司 | Nano high-efficiency composite blockage removing liquid |
| 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 |
| CN104295275A (en) * | 2013-07-17 | 2015-01-21 | 中国石油化工股份有限公司 | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir |
| CN103497756B (en) * | 2013-09-24 | 2016-04-20 | 北京恩瑞达科技股份有限公司 | For removing the acidification blocking remover of oil field contamination and plugging |
| CN103541713B (en) * | 2013-10-12 | 2016-03-30 | 河南理工大学 | A kind of coal bed gas near wellbore zone chemical plugging removal method |
| CN104946232A (en) * | 2014-03-27 | 2015-09-30 | 中国石油化工股份有限公司 | Mixed alcohol-acid liquid system for compact sandstone reservoir |
| CN105018058A (en) * | 2015-06-10 | 2015-11-04 | 天津大港油田滨港集团博弘石油化工有限公司 | Water-based detergent for oilfields and preparation method for same |
| CN110454117A (en) * | 2019-08-14 | 2019-11-15 | 中国石油化工股份有限公司 | A kind of poor thin layer anti-channeling acidification method for removing blockage |
-
2003
- 2003-02-25 CN CN 03106501 patent/CN1216121C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285378B (en) * | 2008-05-09 | 2012-02-01 | 大庆汇联技术开发有限公司 | Activator composite plug removal technology |
| CN101691839B (en) * | 2009-09-30 | 2013-06-26 | 陕西中孚石油技术有限责任公司 | Ultra-low resistance acid-type microemulsion plugging removal and stimulation technology for low permeability oil well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1524922A (en) | 2004-09-01 |
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