CN108590587A - Combined integratedization water injection well de-plugging process method - Google Patents
Combined integratedization water injection well de-plugging process method Download PDFInfo
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- CN108590587A CN108590587A CN201810374597.4A CN201810374597A CN108590587A CN 108590587 A CN108590587 A CN 108590587A CN 201810374597 A CN201810374597 A CN 201810374597A CN 108590587 A CN108590587 A CN 108590587A
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- well
- inorganic
- acid
- plugging
- water injection
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Abstract
The invention discloses a kind of combined integratedization water injection well de-plugging process methods, and solving existing well-flushing mode can not ensure that pit shaft is unimpeded and the technical issues of corrosion causes secondary blocking, technical field of oil production engineering easily occurs.The process includes the following steps：S1：Inorganic de-blocking agent is pumped into well, closing well 12~24 hours；S2：There is well head to scrape to shaft bottom using rotation scraper；S3：Well-washing truck circulation well cleanup is filtered using the skid on ground, it will be in the fine particle contaminant filter to skid well-washing truck of dispersing and dissolving dirt；S4：Inorganic de-blocking agent is recycled in well；S5：Drive a well water filling, utilizes flood pattern de-plugging formation blockage.The technological process is safe and environment-friendly, does not rationally generate waste liquid, and corrosion-free, compatibility is good, de-plugging stratum while de-plugging pit shaft blocks.
Description
Technical field
The invention belongs to technical field of oil production engineering, and in particular to a kind of combined integratedization water injection well de-plugging process method.
Background technology
Water injection well is during long-term injecting water at present, due to water quality compatibility difference and with bore, with repair, test, pipeline is damaged,
The factors such as dynamic pass stop noting, and the suspended contamination, calcium carbonate and a small amount of carbonic acid magne-scale in water are precipitated, are attached on shaft in wall,
It causes tube inner wall latus rectum to become smaller even to block.Current daily management technical way is using conventional well-flushing and technique well-flushing
Mode, both modes can not ensure that pit shaft is unimpeded, and take hydrochloric acid, hydrofluoric acid de-plugging easily occur burn into secondary precipitation,
It even destroys reservoir skeleton and causes secondary blocking, the normal water filling of water injection well can not be restored.
Invention content
It can not ensure that pit shaft is unimpeded the purpose of the present invention is to solve existing well-flushing mode and easily occur to corrode to make
The technical issues of at secondary blocking, provides a kind of combined integratedization water injection well de-plugging process method, dirty to water injection well shaft in wall,
The impurity such as stratum dirt carry out the scraping of chemical agent dispersing and dissolving, wash cycles, and synchronize to return and drain into ground filtration system.
To achieve the goals above, the present invention provides the following technical solutions：
Combined integratedization water injection well de-plugging process method, includes the following steps：
S1：Inorganic de-blocking agent is pumped into well, closing well 12~24 hours；
S2：There is well head to scrape to shaft bottom using rotation scraper；
S3：Well-washing truck circulation well cleanup is filtered using the skid on ground, by the fine particle contaminant filter of dispersing and dissolving dirt
To skid well-washing truck；
S4：Inorganic de-blocking agent is recycled in well；
S5：Drive a well water filling, utilizes flood pattern de-plugging formation blockage；
The inorganic de-blocking agent includes the component of following parts by weight：8~12 parts of compounding acid, 0.1~1 part of cleanup additive, inhibition
60~80 parts of 1~2 part of agent, 0.1~1 part of ferrous stability, 0.5~2 part of surfactant and water；
Wherein, compounding acid by inorganic acid and weak ion strong acid according to 2.5:1 weight ratio is composed.
Further, the inorganic acid is mud acid, and wherein the mass ratio of hydrochloric acid and hydrofluoric acid is 2~3:1.
Further, the weak ion strong acid is formic acid.
Further, the cleanup additive is non-ionic polyacrylamide.
Further, the corrosion inhibiter is sodium benzoate.
Further, the ferrous stability is Na2SO3。
Further, the surfactant is SAS.
Further, the preparation method of the inorganic de-blocking agent is：By weight, compounding sour 8~12 parts, the row of helping are weighed
In 0.1~1 part of 0.1~1 part of agent, 1~2 part of corrosion inhibiter and ferrous stability addition reaction kettle, adds 60~80 parts of stirrings of water, rise
Temperature continues stirring 10~15 minutes to 37~40 DEG C, then weighs in 0.5~2 part of addition reaction kettle of surfactant, continues to stir
It 15~20 minutes, is then allowed to stand, obtains inorganic de-blocking agent.
Compared with prior art the beneficial effects of the invention are as follows：
Existing equipment is relatively simple, and the de-plugging agents such as existing hydrochloric acid, hydrofluoric acid have corrosivity, compatibility poor, easy
Stratum is destroyed, does not have descaling function, and generate waste liquid, dangerous environmental protection.And combined integratedization water filling provided by the invention
Well de-plugging process method, rationally makes full use of inorganic de-blocking agent, tool, ground installation to be combined construction, removes water injection well
The impurity such as the dirt that long-term injecting water is formed during making in shaft in wall keep pit shaft unimpeded.The technological process is safe and environment-friendly, closes
Reason does not generate waste liquid, and corrosion-free, compatibility is good, de-plugging stratum while de-plugging pit shaft blocks.
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with embodiment to this
Invention is further detailed.Device therefor is commercial product in embodiment.Inorganic de-blocking agent described in embodiment
Voluntarily to prepare, component includes compounding acid, cleanup additive, corrosion inhibiter, ferrous stability and surfactant.
The compounding acid be developed for carbonate and silicate dual structure for oil duct, including inorganic acid and it is weak from
Sub- strong acid, inorganic acid are reacted with carbonate generation, and weak ion strong acid is reacted with silicate generation, is effectively acidified to oil duct
Cleaning.For inorganic acid using mud acid, mud acid is a kind of solid acid of strong acid together with Strong oxdiative compounding, is had very strong
It is acidified oxidation, can generate and react with carbonate, silicate, quartz and all kinds of colloid sundries in oil duct, in oil duct
Acidification cleaning is carried out, so as to the plugging removal effect for making oil duct microcrack reach, improves the flow conductivity in crack, which desilts for solution
Slurry blocks and improves the permeability on mud sandstone stratum, play the role of it is fine, in favor of water filling or fuel-displaced, while the compounding acid energy
Effectively solve the problems, such as the deep acidification of oil duct.
Work raffinate in the operation process such as the cleanup additive can help to be acidified, pressure break returns row from stratum, and of the invention helps
It arranges agent and uses non-ionic polyacrylamide, there is very low interfacial tension, generally need 8mN/m hereinafter, the absorption to stratum overcomes
May be low, it does not have an effect to other working solutions, while not generating injury to stratum.In addition, the effect of the corrosion inhibiter is to subtract
Few metal and rubber corrosion；The effect of the ferrous stability is stable metal ion valence state；The work of the surfactant
With being wetting, infiltration, emulsification, dispersion and oil removing, by reducing surface tension, wax that perforated interval and near wellbore zone are adsorbed,
Organic species tamper such as colloid, asphalitine strips down；It is acted on by molten wax viscosity reduction, by bulk or graininess tamper and water
Dissolving emulsification is conducive to tamper stratum is discharged with water flooding；Oil-in-water state is converted to by Water-In-Oil state, reduces original
The resistance of oil migration, is conducive to crude oil and well head is discharged in tamper；It is acted on by wettability reversal, by the oleophylic sex reversal of ground layer original
For hydrophily, subsequent crude oil is no longer adsorbed in surface of stratum again.
The preparation of 1 inorganic de-blocking agent of embodiment
0.1 part of 6 parts of hydrochloric acid, 2 parts of hydrofluoric acid, 0.1 part of cleanup additive, 1 part of corrosion inhibiter and ferrous stability is weighed to be added instead
It answers in kettle, adds 60 parts of stirrings of water, be warming up to 37 DEG C, continue stirring 15 minutes, then weigh 0.5 part of addition reaction kettle of surfactant
In, continue stirring 15 minutes, is then allowed to stand, obtains inorganic de-blocking agent.
The preparation of 2 inorganic de-blocking agent of embodiment
Weigh 1 part of 8 parts of hydrochloric acid, 4 parts of hydrofluoric acid, 1 part of cleanup additive, 2 parts of corrosion inhibiter and ferrous stability addition reaction kettle
In, add 80 parts of stirrings of water, is warming up to 40 DEG C, continues stirring 10 minutes, then weigh in 2 parts of addition reaction kettles of surfactant, after
Continuous stirring 15 minutes, is then allowed to stand, obtains inorganic de-blocking agent.
3 combined integratedization water injection well de-plugging process method of embodiment
S1：The inorganic de-blocking agent that embodiment 1 is prepared is pumped into well, closing well 12 hours；
S2：It is scraped to shaft bottom using rotation scraper；
S3：Well-washing truck circulation well cleanup is filtered using the skid on ground, by the fine particle contaminant filter of dispersing and dissolving dirt
To skid well-washing truck；
S4：Inorganic de-blocking agent is recycled in well；
S5：Drive a well water filling, utilizes flood pattern de-plugging formation blockage.
By above step, the impurity such as the dirt formed in shaft in wall during water injection well long-term injecting water is made are removed, are protected
It is unimpeded pit shaft is held, and corrosion-free, de-plugging stratum while de-plugging pit shaft blocks.
4 combined integratedization water injection well de-plugging process method of embodiment
S1：The inorganic de-blocking agent that embodiment 2 is prepared is pumped into well, closing well 24 hours；
S2：It is scraped to shaft bottom using rotation scraper；
S3：Well-washing truck circulation well cleanup is filtered using the skid on ground, by the fine particle contaminant filter of dispersing and dissolving dirt
To skid well-washing truck；
S4：Inorganic de-blocking agent is recycled in well；
S5：Drive a well water filling, utilizes flood pattern de-plugging formation blockage.
By above step, the impurity such as the dirt formed in shaft in wall during water injection well long-term injecting water is made are removed, are protected
It is unimpeded pit shaft is held, and corrosion-free, de-plugging stratum while de-plugging pit shaft blocks.
Comparative example 1
0.1 part of 8 parts of hydrochloric acid, 2 parts of hydrofluoric acid, 0.1 part of cleanup additive, 1 part of corrosion inhibiter and ferrous stability is weighed to be added instead
It answers in kettle, adds 60 parts of stirrings of water, be warming up to 37 DEG C, continue stirring 15 minutes, then weigh 0.5 part of addition reaction kettle of surfactant
In, continue stirring 15 minutes, is then allowed to stand, obtains inorganic de-blocking agent.
Comparative example 2
It weighs in 0.1 part of 6 parts of hydrochloric acid, 2 parts of hydrofluoric acid and ferrous stability addition reaction kettle, adds 60 parts of stirrings of water, rise
Temperature continues stirring 15 minutes, then weigh in 0.5 part of addition reaction kettle of surfactant to 37 DEG C, continues stirring 15 minutes, then
It stands, obtains inorganic de-blocking agent.
1 performance test of test example
Oil well fouling dirt sample A and dirt sample B is taken to be analyzed, wherein dirty sample A is pit shaft dirt, and mechanical performance is loose, easy
It is broken, easily remove；Dirty sample B is that pump hangs dirt, and mechanical performance is hard, hardly possible is broken, difficult removes.The composition analysis result of dirty sample A and dirty sample B are shown in Table
1。
1 dirt sample A of table and dirty sample B component analysis
Scale removal performance：With reference to the test method of SY/T 5405-1996, respectively by dirty sample A or dirt sample B be put into embodiment 1~
In 2 inorganic de-blocking agents prepared, 45 DEG C of temperature control every two hours observes dirty sample dissolving, dispersion situation, continues 48 hours.Scale removal
Energy evaluation criterion is shown in Table 2, and scale removal and Corrosion results are shown in Table 4 and table 5.
2 scale removal Performance evaluation criterion of table
| Visual method | Difference | Generally | By force |
| Descaling rate | <50% | 50%-85% | >85% |
Corrosive nature：With reference to the test method of SY/T 5405-1996, respectively by the test piece of H64 brass, the test piece of N80 steel, L64
Steel test piece and nitrile rubber test piece are put into the inorganic de-blocking agent of Examples 1 to 2 preparation, 45 DEG C of temperature control, observation one in every 24 hours
Secondary test piece corrosion condition continues 48 hours.Evaluation of Corrosion Resistance standard is shown in Table 3, and scale removal and Corrosion results are shown in Table 4 and table 5.
3 Evaluation of Corrosion Resistance standard of table
The molten dirty rate of inorganic de-blocking agent and corrosion condition prepared by 4 Examples 1 to 2 of table and comparative example 1~2
(condition：45℃)
The molten dirty rate of inorganic de-blocking agent and corrosion condition prepared by 5 Examples 1 to 2 of table and comparative example 1~2
(condition：45℃)
It is significant that test result shows that inorganic de-blocking agent has the oil well fouling removing based on silicate scale and carbonate scale
Effect, and cleanup additive has facilitation, corrosion inhibiter to enhance corrosion resistance scale removal.Selected compounding acid of the invention, to this
The inorganic de-blocking agent of invention has apparent synergistic effect.45 DEG C for 24 hours the molten dirty rates of r up to the molten dirty rates of 80% or more, 48hr up to 95% with
On, almost all is scattered.To sum up, the time is longer, and molten dirt effect is better.
Above certain exemplary embodiments that the present invention is only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute
The embodiment of description is modified.Therefore, above-described embodiment and description are regarded as illustrative in nature, and should not be construed as to this hair
The limitation of bright claims.
Claims (8)
1. combined integratedization water injection well de-plugging process method, which is characterized in that include the following steps：
S1：Inorganic de-blocking agent is pumped into well, closing well 12~24 hours；
S2：There is well head to scrape to shaft bottom using rotation scraper；
S3：Well-washing truck circulation well cleanup is filtered using the skid on ground, by the fine particle contaminant filter of dispersing and dissolving dirt to sled
It fills in well-washing truck；
S4：Inorganic de-blocking agent is recycled in well；
S5：Drive a well water filling, utilizes flood pattern de-plugging formation blockage；
The inorganic de-blocking agent includes the component of following parts by weight：8~12 parts of compounding acid, 0.1~1 part of cleanup additive, corrosion inhibiter 1~
60~80 parts of 2 parts, 0.1~1 part of ferrous stability, 0.5~2 part of surfactant and water；
Wherein, compounding acid by inorganic acid and weak ion strong acid according to 2.5:1 weight ratio is composed.
2. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the inorganic acid is
The mass ratio of mud acid, wherein hydrochloric acid and hydrofluoric acid is 2~3:1.
3. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the weak ion strong acid
For formic acid.
4. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the cleanup additive is non-
Cationic polyacrylamide.
5. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the corrosion inhibiter is benzene
Sodium formate.
6. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the iron ion is stablized
Agent is Na2SO3。
7. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the surfactant
For SAS.
8. combined integratedization water injection well de-plugging process method as described in claim 1, which is characterized in that the inorganic de-blocking agent
Preparation method be：By weight, 8~12 parts of compounding acid, 0.1~1 part of cleanup additive, 1~2 part of corrosion inhibiter and iron ion are weighed
In 0.1~1 part of addition reaction kettle of stabilizer, adds 60~80 parts of stirrings of water, be warming up to 37~40 DEG C, continue 10~15 points of stirring
Clock, then weigh in 0.5~2 part of addition reaction kettle of surfactant, continue stirring 15~20 minutes, be then allowed to stand, obtains inorganic
De-plugging agent.
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Cited By (4)
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| CN109666468A (en) * | 2018-10-31 | 2019-04-23 | 中国石油大学(华东) | Skid-mounted type frozen glue dispersion process units and frozen glue dispersion and preparation method and application |
| CN111379541A (en) * | 2018-12-28 | 2020-07-07 | 新疆中核天山铀业有限公司 | Acid method underground leaching mountain land layer blockage removing method |
| CN114632368A (en) * | 2022-04-22 | 2022-06-17 | 中国地质调查局水文地质环境地质调查中心 | Blockage removing and resistance breaking method for multi-filter-layer circulating well in organic pollution site |
| CN114632368B (en) * | 2022-04-22 | 2024-04-26 | 中国地质调查局水文地质环境地质调查中心 | Method for removing blockage and breaking blockage of multi-filter-layer circulating well in organic pollution site |
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| CN109666468A (en) * | 2018-10-31 | 2019-04-23 | 中国石油大学(华东) | Skid-mounted type frozen glue dispersion process units and frozen glue dispersion and preparation method and application |
| CN111379541A (en) * | 2018-12-28 | 2020-07-07 | 新疆中核天山铀业有限公司 | Acid method underground leaching mountain land layer blockage removing method |
| CN114632368A (en) * | 2022-04-22 | 2022-06-17 | 中国地质调查局水文地质环境地质调查中心 | Blockage removing and resistance breaking method for multi-filter-layer circulating well in organic pollution site |
| CN114632368B (en) * | 2022-04-22 | 2024-04-26 | 中国地质调查局水文地质环境地质调查中心 | Method for removing blockage and breaking blockage of multi-filter-layer circulating well in organic pollution site |
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