CN1145741C - Technology for removing stratum blocking of oil well or water injection well by means of ClO2/hydrochloric acid composition - Google Patents
Technology for removing stratum blocking of oil well or water injection well by means of ClO2/hydrochloric acid composition Download PDFInfo
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- CN1145741C CN1145741C CNB001137239A CN00113723A CN1145741C CN 1145741 C CN1145741 C CN 1145741C CN B001137239 A CNB001137239 A CN B001137239A CN 00113723 A CN00113723 A CN 00113723A CN 1145741 C CN1145741 C CN 1145741C
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- well
- water injection
- oil
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a technology for removing the stratum blockage of an oil well or a water injection well by means of ClO2/hydrochloric acid composition, which comprises the working procedures of well washing, pretreatment, acidization, clay stabilization and displacement, wherein the acidization working procedure is repeated for at least one time, an oxidization working procedure is added between every two acid-injecting working procedure, and chlorine dioxide is injected into a stratum in the oxidization working procedure; in addition, acid liquid in each acidization working procedure is added with a gelatine solvent. The present invention utilizes acidization and oxidization to alternately carry out composite blockage removing technology, and has the advantages of improvement of the seepage performance of an oil layer, enhancement of oil production and extension of an oil producing period.
Description
Technical field
The present invention relates to a kind of technology of removing formation blockage in the oil recovery process of oil field, especially a kind of ClO that utilizes
2The method of the compound releasing oil well of/HCl, water injection well formation blockage.
Background technology
In the oil recovery process of oil field, acidification technology is used to remove near the obstruction on the stratum shaft bottom always, enlarge and link up the original hole in stratum, crack to improve the permeance property on stratum, thereby improve the water injection rate of well and the recovery ratio of oil well, but a large amount of facts have proved, acidification only can solve the infringement that carbonate scale causes well, oil-well strata, to polymer and ferrous sulfide and the biological organic matter of bringing in the oil recovery process. and the formation blockage that the heavy hydrocarbon coking causes then is invalid.
Summary of the invention
The object of the present invention is to provide a kind of utilize acidifying and oxidation hocket the composite blockage relieving technology, can improve the oil reservoir percolation ability, improve the ClO of oil production
2The method of the compound releasing oil well of/HCl, water injection well formation blockage.
Purpose of the present invention can realize by following measure:
A kind of method of utilizing ClO 2 solution and hydrochloric acid solution to remove oil well, water injection well formation blockage, this method comprises well-flushing, preliminary treatment, acidifying, clay stabilizationization, displacement; Acidizing process is repeated once at least, increase an oxidation operation again between per twice notes acid operation, this oxidation operation is that ClO 2 solution is injected the stratum; In the acid solution of the sour operation of each notes, add the colloid solvent in addition.
The present invention has following advantage compared to existing technology:
The present invention carries out the sour operation of existing notes several times, between per twice notes acid operation, increase a chlorine dioxide oxidation operation, can utilize the sour dissolved carbon hydrochlorate calcium dirt that injects for the first time, under low PH condition, be beneficial to the H that polymer, ferrous sulfide, bacterium and the generation on stratum are stopped up in the chlorine dioxide oxidation
2S gas; The remaining carbonate of acid solution dissolving that injects for the second time; So repeat repeatedly, progressively enlarge acidifying, oxidation involves scope; The present invention also adds colloid dissolution with solvents heavy hydrocarbon coking material, wax, asphalitine, cement in acid solution, and makes the stratum increase hydrophily; The present invention passes through ClO
2The compound action of/HCl can be removed the obstruction of depth layer, improves the percolation ability of oil reservoir, improves oil production, and reaches the purpose that prolongs productive life.
The specific embodiment
The present invention also will be described in further detail in conjunction with the embodiments:
A kind of ClO
2The method of the compound releasing oil well of/HCl, water injection well formation blockage, this method comprises existing well-flushing, preliminary treatment, acidifying, clay stabilizationization, the preface of working as a substitute of speeding; To have acidizing process now and repeat six times, annotating at per twice increases an oxidation operation again between the acid treatment operation, and this oxidation operation is that ClO 2 solution is injected the stratum; The complete process of the embodiment of the invention is as follows: well-flushing → preliminary treatment → notes acid → reaction → notes ClO
2→ reaction → notes acid → reaction → notes clay stabilizer → notes acid → reaction → notes ClO
2→ reaction → notes acid → reaction → notes clay stabilizer → notes acid → reaction → notes ClO
2→ reaction → notes acid → reaction → displacement → completion; Chlorine dioxide accounts for the 0.15-0.3% of oxidation liquid concentration in the oxidation operation in the above-mentioned technology; In the acid solution of each acidification operation, add the colloid solvent in addition; The colloid solvent is to be produced by Yisheng Chemical Co Ltd, Lanzhou City, and its model is P0-100, and Main Ingredients and Appearance is anion and/or non-ionic surface active agent and solvent composition; The colloid solvent accounts for the 3-8% of acid solution weight.
Claims (2)
1, a kind of method of utilizing ClO 2 solution and hydrochloric acid solution to remove oil well, water injection well formation blockage, this method comprises well-flushing, preliminary treatment, acidifying, clay stabilizationization, displacement; It is characterized in that acidizing process is repeated once at least, increase an oxidation operation again between per twice notes acid operation, this oxidation operation is that ClO 2 solution is injected the stratum; In the acid solution of the sour operation of each notes, add the colloid solvent in addition.
2, the method for utilizing ClO 2 solution and hydrochloric acid solution to remove oil well, water injection well formation blockage as claimed in claim 1 is characterized in that described colloid solvent is anion and/or non-ionic surface active agent and solvent composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001137239A CN1145741C (en) | 2000-01-20 | 2000-01-20 | Technology for removing stratum blocking of oil well or water injection well by means of ClO2/hydrochloric acid composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001137239A CN1145741C (en) | 2000-01-20 | 2000-01-20 | Technology for removing stratum blocking of oil well or water injection well by means of ClO2/hydrochloric acid composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1306149A CN1306149A (en) | 2001-08-01 |
| CN1145741C true CN1145741C (en) | 2004-04-14 |
Family
ID=4583483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001137239A Expired - Fee Related CN1145741C (en) | 2000-01-20 | 2000-01-20 | Technology for removing stratum blocking of oil well or water injection well by means of ClO2/hydrochloric acid composition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1145741C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395429C (en) * | 2006-05-17 | 2008-06-18 | 王洪新 | Injection pretreatment method for oil water well |
| CN101781982A (en) * | 2010-02-25 | 2010-07-21 | 中国石油化工股份有限公司 | Short-injection water injection well acidation injectivity process |
| 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 |
| CN103396777A (en) * | 2013-07-22 | 2013-11-20 | 郝占元 | Application of chlorine dioxide blocking remover in coal bed modification |
| CN105484717B (en) * | 2015-11-24 | 2018-05-18 | 西南石油大学 | A kind of method for improving rich organic shale matrix permeability |
| CN112228008A (en) * | 2020-10-17 | 2021-01-15 | 濮阳市华瑞通能源工程技术有限公司 | Oil well blockage removing method for seriously-scaled shaft |
| CN113292974B (en) * | 2021-06-21 | 2023-03-17 | 长江大学 | Chlorine dioxide polymer oxidation blocking remover |
-
2000
- 2000-01-20 CN CNB001137239A patent/CN1145741C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1306149A (en) | 2001-08-01 |
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