CN105754567A - Scale remover for water injection well, and preparation method and application of scale remover - Google Patents
Scale remover for water injection well, and preparation method and application of scale remover Download PDFInfo
- Publication number
- CN105754567A CN105754567A CN201410784912.2A CN201410784912A CN105754567A CN 105754567 A CN105754567 A CN 105754567A CN 201410784912 A CN201410784912 A CN 201410784912A CN 105754567 A CN105754567 A CN 105754567A
- Authority
- CN
- China
- Prior art keywords
- injection well
- scale remover
- water injection
- water
- dispersant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Detergent Compositions (AREA)
Abstract
The invention discloses a scale remover for a water injection well, and a preparation method and an application of the scale remover, and belongs to the field of oil field development. The scale remover comprises the following components, by mass, 25-40% of a scale-dissolving agent, 3-6% of a dispersant, 3-6% of a corrosion inhibitor, 3-6% of a cleanup additive, and 1-3% of a suspending agent, with the balance being water. The scale-dissolving agent is a hydrochloric acid solution having a concentration of 25-37%; the dispersant is selected from at least one of carboxymethyl cellulose, sodium dodecyl sulfate, and 1-methylpentanol; the corrosion inhibitor is chloridized benzylquinoline quaternary ammonium salt; the cleanup additive is selected from at least one of dodecylpyridinium bromide, hexadecylpyridinium bromide, and octadecylpyridinium bromide; and the suspending agent is lignin. The scale remover can deeply remove scale, has a corrosion inhibition function, is easy to flow back, and doesn't cause secondary pollution on the stratum.
Description
Technical field
The present invention relates to oil field development field, particularly to a kind of water injection well scale remover and its preparation method and application.
Background technology
In water flooding process, it is common to use water injection well injects water into oil reservoir, keep or recover formation pressure, making oil reservoir have stronger driving force, to improve exploitation rate and the recovery ratio of oil reservoir.But, water injection well is in use, due to burn into precipitation, gum deposit, carbon deposit, bacterial reproduction etc., easily cause pipe string internal wall fouling, the deposition of incrustation scale causes the electrochemical corrosion of tubing string local, reduced stream cross-sectional area, and increased hydraulic resistance and carry energy, blocking oil well passage, thus reducing oil well output.And, pump card, screen casing also can be caused to block, down-hole string, instrument block, operation can not pulled out, do not go under test instrunment, causes bigger difficulty to maintenance, has a strong impact on the normal of oil field and produce and economic benefit.It is therefore necessary to water injection well is carried out scale removal.
The method that water injection well carries out scale removal at present mainly includes mechanical descaling and chemical cleaning.Wherein, mechanical descaling utilizes rotating disk or helicoid hydraulic motor to drive down-hole string to rotate, and utilizes the rotation being connected on the drill bit of foot, junk mill or milling cone to bore the dirt on Decanning wall, then rinses with cementing truck and take ground out of, reach scale removal purpose.But mechanical descaling can endanger the integrity of tubing string in operation process, poor for irregular tubing string adaptability, and the dirty thing of near wellbore cannot be removed, duty cycle is longer.Chemical cleaning method is the most frequently used descaling method, and it is that the effect by chemical agent makes the incrustation scale being cleaned by equipment dissolve, loosen, come off or peel off, and its advantage is that specific aim is relatively strong, and construction technology is simple, less costly.
For example, CN102604617A provides a kind of oil-water well carbonate scale remover, penetrating agent, dirt lytic agent, detergent, scale removal synergist, anti-soil adhesion extender and water mix.Wherein, penetrating agent is disecoctylmaleate sodium sulfonate, and dirt lytic agent is disodiumedetate；Detergent is petroleum sulfonate, Brij 35 sodium sulfate or alkylpolyoxyethylene；Scale removal synergist is potassium fluoride, Disodium oxalate. or Ammonium persulfate..But, owing to this dirt remover corrosive power is strong, easily cause formation contaminant.In order to reduce the corrosivity of dirt remover, further, CN104046346A provides a kind of water injection well in oil fields scale remover, including following components in percentage by weight: mass concentration is the hydrochloric acid 5-15% of 28-38%, sodium acetate 0.1-1.5%, sodium citrate 0.1-1.5%, sodium fluoride 0.1-8.5%, sodium potassium tartrate tetrahydrate 1-6%, polyoxylethylene abietate 0.05-0.5%, pull open powder 0.05-0.4%, disecoctylmaleate sodium sulfonate 0.2-1.5%, solid chlorous acid glycosides 0.1-0.6%, 1-hydroxy ethylidene-1,1-diphosphonic acid 0.5-1.5%, surplus are water.
Inventor have found that prior art at least there is problems in that
The scale remover that prior art provides easily remains in the earth formation, and stratum is caused secondary pollution.
Summary of the invention
Embodiment of the present invention technical problem to be solved is in that, it is provided that a kind of can degree of depth scale removal again can the water injection well scale remover and its preparation method and application of effectively anticorrosion and the easy row of returning.Concrete technical scheme is as follows:
First aspect, it is provided that a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
As preferably, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant is carboxymethyl cellulose；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；
Described suspending agent is lignin.
Second aspect, the preparation method providing above-mentioned water injection well scale remover, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, in described material-compound tank, then adds lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in described material-compound tank, it is again stirring for after uniformly, then in described material-compound tank, adds suspending agent, obtain water injection well scale remover；
Wherein, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
The third aspect, provide the method utilizing above-mentioned water injection well scale remover to carry out scale removal, including: in injecting water, add water injection well scale remover, the 0.1-3% making described water injection well scale remover weight be described injection water weight, obtain the injection water containing water injection well scale remover；
Utilize water injection well that the described injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
The technical scheme that the embodiment of the present invention provides has the benefit that
The component with above-mentioned restriction of embodiment of the present invention offer and the water injection well scale remover of proportioning, there is between each component good compatibility, by the collaborative compatibility effect between each component, this water injection well scale remover can not only reach the purpose of degree of depth scale removal, and there is corrosion inhibitive function, reach effective antiseptical purpose.And, the aqueous solution surface tension of the water injection well scale remover that the embodiment of the present invention provides is between 18-21mN/m, has the good row's of returning performance, stratum will not be caused secondary pollution.
Detailed description of the invention
For making technical scheme and advantage clearly, below embodiment of the present invention is described further in detail.
First aspect, it is provided that a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.
Wherein, dirt lytic agent can play scale removal solubilization；Dispersant plays promotion dispersion, improves mobility effect；Corrosion inhibiter plays the chemical attack effect reduced equipment installation, it is ensured that borehole wall extent of corrosion is reached minimum by acid solution；Cleanup additive plays the effect helping work residual liquid to return row from stratum, can avoid the generation of secondary precipitation；Suspending agent plays the effect preventing working solution from decomposing, precipitating, and can strengthen system compatibility.
Based on above-mentioned known, the component with above-mentioned restriction of embodiment of the present invention offer and the water injection well scale remover of proportioning, there is between each component good compatibility, by the collaborative compatibility effect between each component, this water injection well scale remover can reach the purpose of degree of depth scale removal, release blocking at short notice, improve reservoir permeability, the normal water filling of fast quick-recovery.And scale remover of the present invention has corrosion inhibitive function, the corrosion that waterflood-transmission line and equipment are caused is down to minimum, reaches effective antiseptical purpose.Further, the aqueous solution surface tension of water injection well scale remover of the present invention is between 18-21mN/m, has the good row's of returning performance, it is easy to the row of returning, and is beneficial to work residual liquid and discharges from stratum.Additionally, scale remover adaptive type of the present invention is strong, multiple water injection well dirt all there is certain scale removal effect.
In order to ensure that scale remover of the present invention has preferably scale removal, anticorrosion and the row's of returning ability simultaneously, as preferably, this water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in this compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；Suspending agent is lignin.
Second aspect, the preparation method embodiments providing above-mentioned water injection well scale remover, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, in described material-compound tank, then adds lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in described material-compound tank, it is again stirring for after uniformly, then in described material-compound tank, adds suspending agent, obtain water injection well scale remover.
It is understood that this water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water.Dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.
The embodiment of the present invention prepares water injection well scale remover by above-mentioned method, is more conducive to each component and mixes equably, it is ensured that its compatibility, thus preparing the desired water injection well scale remover of the embodiment of the present invention.
The third aspect, embodiments provide the application of above-mentioned water injection well scale remover, namely the method utilizing above-mentioned water injection well scale remover to carry out scale removal is provided, including: in injecting water, add water injection well scale remover, making water injection well scale remover weight is inject the 0.1-3% of water weight, obtains the injection water containing water injection well scale remover；
Utilize water injection well that this injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
The embodiment of the present invention utilizes said method that water injection well scale remover is applied, and the application making this scale remover is simple and convenient, improves scale removal efficiency.And, by scale remover is defined in the proportioning injected in water, to ensure while reaching good scale removal, antiseptic effect, do not cause the waste of scale remover.As preferably, above-mentioned water injection well scale remover weight is inject water weight 2%.
It is understandable that, " utilizing water injection well that this injection water containing water injection well scale remover is injected stratum " above-mentioned in the embodiment of the present invention and " row of returning " process are state of the art, and those skilled in the art can carry out aforesaid operations according to this area conventional means.
Hereinafter will be further described through the present invention by specific embodiment.
Unreceipted condition person in specific examples below, all conventionally condition carries out.Raw materials used unreceipted production firm and specification person be can pass through city available from conventional products.
Embodiment 1
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25%, dispersant 3%, corrosion inhibiter 3%, cleanup additive 3%, suspending agent 1%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25%；Dispersant is sodium lauryl sulphate；Corrosion inhibiter is；Cleanup additive is dodecyl bromide pyridine；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 2
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 40%, dispersant 6%, corrosion inhibiter 6%, cleanup additive 6%, suspending agent 3%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 37%；Dispersant is 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is brocide；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 3
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 32%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 4
The present embodiment utilizes the embodiment 1-3 water injection well scale remover provided respectively the 10-86 well in area, 31-4 well and 10-126X well in North China Oilfield Ji to be carried out dirty removing processing, and has measured with regard to related data therein.
Concrete operation step is as follows: pumped in pressure duct by water injection well scale remover in the predetermined ratio shown in table 1 at the distributing room for water injection high-pressure pump injecting water, and injects stratum along with injecting water.After 4 hours, work residual liquid is carried out the row of returning.Operating parameter and experimental result in experimentation are as shown in table 1.
Table 1
As shown in Table 1, water injection well in oil fields effectively can be carried out scale removal by the scale remover that the embodiment of the present invention provides, and releases blocking, improves reservoir permeability, the normal water filling of fast quick-recovery, and improves water injection rate, has the anti-scaling function of excellence.The scale remover that the embodiment of the present invention provides also has excellent anti-corrosion function, effectively slows down the corrosion of waterflood-transmission line and equipment.And, the scale remover surface tension in aqueous that the embodiment of the present invention provides is very little, be more conducive to the row of returning, it is to avoid cause secondary pollution in the earth formation.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the scope of the invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (5)
1. a water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
2. water injection well scale remover according to claim 1, it is characterized in that, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant is carboxymethyl cellulose；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；
Described suspending agent is lignin.
3. the preparation method of the water injection well scale remover described in a claim 1, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, then in described material-compound tank, add lytic agent and dispersant again, after stirring, then in described material-compound tank, add corrosion inhibiter and cleanup additive, be again stirring for after uniformly, in described material-compound tank, add suspending agent again, obtain water injection well scale remover；
Wherein, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
4. utilize the method that the water injection well scale remover described in claim 1 or 2 carries out scale removal, including: in injecting water, add water injection well scale remover, the 0.1-3% making described water injection well scale remover weight be described injection water weight, obtains the injection water containing water injection well scale remover；
Utilize water injection well that the described injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
5. method according to claim 4, it is characterised in that described water injection well scale remover weight is the 2% of described injection water weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784912.2A CN105754567B (en) | 2014-12-17 | 2014-12-17 | A kind of water injection well scale remover and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784912.2A CN105754567B (en) | 2014-12-17 | 2014-12-17 | A kind of water injection well scale remover and its preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105754567A true CN105754567A (en) | 2016-07-13 |
| CN105754567B CN105754567B (en) | 2018-08-14 |
Family
ID=56340135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410784912.2A Active CN105754567B (en) | 2014-12-17 | 2014-12-17 | A kind of water injection well scale remover and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105754567B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112605A (en) * | 2018-08-28 | 2019-01-01 | 常州大学 | A kind of electrolytic copper foil titanium-based iridium-tantalum pentoxide coated anode regeneration treatment liquid and regeneration method |
| CN113337262A (en) * | 2021-06-07 | 2021-09-03 | 中国石油化工股份有限公司 | Composite descaling method for split-injection water injection well |
| CN114426823A (en) * | 2021-12-30 | 2022-05-03 | 中国石油化工股份有限公司 | Oil field insoluble scale dispersing solubilizer and preparation method thereof |
| CN114806529A (en) * | 2022-05-31 | 2022-07-29 | 中国石油化工股份有限公司 | Scale-dissolving cosolvent and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4789523A (en) * | 1987-07-23 | 1988-12-06 | Westvaco Corporation | Cationic and anionic lignin amines corrosion inhibitors |
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN102311728A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气股份有限公司 | Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof |
| CN102443811A (en) * | 2010-10-14 | 2012-05-09 | 孔令凯 | Ferrous sulfide cleaning agent |
| CN102703045A (en) * | 2012-06-18 | 2012-10-03 | 长江大学 | Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field |
| CN103642479A (en) * | 2013-12-03 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Cleaning agent for residual oil well cement precipitation layer on inner wall of pipeline |
| CN103773639A (en) * | 2014-01-23 | 2014-05-07 | 南通苏通分离工程科技有限公司 | Equipment descaling agent and preparation method thereof |
| CN104046346A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Oil-field water injection well descaling agent and preparation method thereof |
-
2014
- 2014-12-17 CN CN201410784912.2A patent/CN105754567B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4789523A (en) * | 1987-07-23 | 1988-12-06 | Westvaco Corporation | Cationic and anionic lignin amines corrosion inhibitors |
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN102311728A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气股份有限公司 | Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof |
| CN102443811A (en) * | 2010-10-14 | 2012-05-09 | 孔令凯 | Ferrous sulfide cleaning agent |
| CN102703045A (en) * | 2012-06-18 | 2012-10-03 | 长江大学 | Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field |
| CN104046346A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Oil-field water injection well descaling agent and preparation method thereof |
| CN103642479A (en) * | 2013-12-03 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Cleaning agent for residual oil well cement precipitation layer on inner wall of pipeline |
| CN103773639A (en) * | 2014-01-23 | 2014-05-07 | 南通苏通分离工程科技有限公司 | Equipment descaling agent and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112605A (en) * | 2018-08-28 | 2019-01-01 | 常州大学 | A kind of electrolytic copper foil titanium-based iridium-tantalum pentoxide coated anode regeneration treatment liquid and regeneration method |
| CN109112605B (en) * | 2018-08-28 | 2020-04-14 | 常州大学 | Regeneration treatment liquid and regeneration method of titanium-based iridium-tantalum oxide coating anode for electrolytic copper foil |
| CN113337262A (en) * | 2021-06-07 | 2021-09-03 | 中国石油化工股份有限公司 | Composite descaling method for split-injection water injection well |
| CN114426823A (en) * | 2021-12-30 | 2022-05-03 | 中国石油化工股份有限公司 | Oil field insoluble scale dispersing solubilizer and preparation method thereof |
| CN114426823B (en) * | 2021-12-30 | 2022-12-30 | 中国石油化工股份有限公司 | Oil field insoluble scale dispersing solubilizer and preparation method thereof |
| CN114806529A (en) * | 2022-05-31 | 2022-07-29 | 中国石油化工股份有限公司 | Scale-dissolving cosolvent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105754567B (en) | 2018-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102083938B (en) | High density breaker fluids and methods of use thereof | |
| SA97180598B1 (en) | An improved spur treatment method | |
| EP2909284B1 (en) | Wellbore servicing compositions and methods of making and using same | |
| CN106867490A (en) | A kind of chelating de-plugging agent suitable for complicated fouling reservoir and preparation method thereof | |
| AU2017206053A1 (en) | Breaker fluids and methods of use thereof | |
| CN108822819A (en) | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid | |
| US7081438B2 (en) | Drilling fluids, drilling fluids additives and methods useful for limiting tar sands accretion on metal surfaces | |
| CN105754567B (en) | A kind of water injection well scale remover and its preparation method and application | |
| AU2017286720B2 (en) | Compositions and methods for preparation and utilization of acid-generating materials | |
| CN104004505B (en) | A kind of Solid Free organic clear brine completion fluid | |
| CA2910636C (en) | Degrading wellbore filtercake with acid-producing microorganisms | |
| CN102373037B (en) | Novel biological blockage removing solution for well completion, and production method thereof | |
| CN104640956A (en) | Method for dissolving deposits containing alkaline earth metal sulphates | |
| CN104531380B (en) | A kind of preparation method of paraffin removal cleaning agent for oil pumping in oil fields pipeline | |
| CN109652043A (en) | One kind being suitable for the chemical plugging removal agent of tri compound drive injection well | |
| CN112708406B (en) | Biochemical composite blocking remover and preparation method and application thereof | |
| CN102399546B (en) | Environment-friendly composite blocking remover composition for oil fields | |
| CN109294551A (en) | A kind of cleaning low damage agent of molecular cluster and its application | |
| EP2158289B1 (en) | Methods for stimulating oil or gas production | |
| NO20180877A1 (en) | Environmentally friendly wellbore consolidating/fluid loss material | |
| NO20200526A1 (en) | Downhole high temperature rheology control | |
| CN103206192A (en) | Method for rapidly cleaning insoluble dirt in oil wells and oil reservoirs close to oil wells | |
| US20050037927A1 (en) | Drilling Fluids, Drilling Fluids Additives and Methods Useful for Limiting Tar Sands Accretion on Metal Surfaces | |
| CN104673268A (en) | Neutral fracturing fluid composition in oil extraction floor layer of oil field and preparation method of neutral fracturing fluid composition | |
| US11773705B1 (en) | Changing calcium carbonate particle size with starch for reservoir fluids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |