CN105754567B - A kind of water injection well scale remover and its preparation method and application - Google Patents
A kind of water injection well scale remover and its preparation method and application Download PDFInfo
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- CN105754567B CN105754567B CN201410784912.2A CN201410784912A CN105754567B CN 105754567 B CN105754567 B CN 105754567B CN 201410784912 A CN201410784912 A CN 201410784912A CN 105754567 B CN105754567 B CN 105754567B
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Abstract
The invention discloses a kind of water injection well scale removers and its preparation method and application, belong to oil field development field.The water injection well scale remover includes the component of following mass percentage：Dirty lytic agent 25 40%, dispersant 3 6%, corrosion inhibiter 3 6%, cleanup additive 3 6%, suspending agent 1 3%, surplus are water；Wherein, the hydrochloric acid that dirty lytic agent is a concentration of 25 37%；Dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1 methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is selected from least one of dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.Water injection well scale remover energy depth scale removal of the present invention has corrosion inhibitive function, and is easy to the row of returning, and will not cause secondary pollution to stratum.
Description
Technical field
The present invention relates to oil field development field, more particularly to a kind of water injection well scale remover and its preparation method and application.
Background technology
During water flooding, oil reservoir is injected water into usually using water injection well, keeps or restores formation pressure, make
Oil reservoir has stronger driving force, to improve the exploitation rate and recovery ratio of oil reservoir.However, 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, and the deposition of incrustation scale causes the electricity of tubing string part
Chemical attack reduces overcurrent cross-sectional area, increases hydraulic resistance and conveying energy, blocking oil well channel, to reduce oil well production
Amount.Moreover, can also cause pump card, screen casing blocks, down-hole string, tool block, operation can not pulled out, not gone under test equipment, be given
Repair causes larger difficulty, seriously affects normal production and the economic benefit in oil field.It is therefore necessary to carry out scale removal to water injection well.
The method for carrying out scale removal to water injection well at present includes mainly mechanical descaling and chemical cleaning.Wherein, mechanical descaling is
It drives down-hole string to rotate using turntable or helicoid hydraulic motor, is gone using the rotation brill for being connected on the drill bit of lowest part, junk mill or milling cone
Then dirt on casing wall takes ground out of with cementing truck flushing, reaches scale removal purpose.But mechanical descaling can endanger in operation process
The integrality of evil tubing string, it is poor for irregular tubing string adaptability, and the dirt of near wellbore can not be removed, duty cycle compared with
It is long.Chemical cleaning method is most common descaling method, it is to keep the incrustation scale in cleaned equipment molten by the effect of chemical agent
It solves, is loose, falling off or remove, its advantage is that specific aim is stronger, construction technology is simple, and cost is relatively low.
For example, CN102604617A provides a kind of oil-water well carbonate scale remover, is dissolved by bleeding agent, dirt
Agent, detergent, scale removal synergist, anti-soil adhesion swelling agent and water mix.Wherein, bleeding agent is maleic acid di-sec-octyl
Sodium sulfonate, dirty lytic agent are disodium ethylene diamine tetraacetate；Detergent is petroleum sulfonate, Brij 35 sulfuric acid
Sodium or dodecyl polyoxyethylene ether；Scale removal synergist is potassium fluoride, sodium oxalate or ammonium persulfate.However, since the dirt removes
Agent corrosive power is strong, easily causes formation contaminant.In order to reduce the corrosivity of dirty remover, further, CN104046346A is carried
A kind of water injection well in oil fields scale remover, including following components in percentage by weight are supplied：Mass concentration is the hydrochloric acid 5- of 28-38%
15%, sodium acetate 0.1-1.5%, sodium citrate 0.1-1.5%, sodium fluoride 0.1-8.5%, sodium potassium tartrate tetrahydrate 1-6%, rosin acid
Polyoxyethylene ester 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.
The inventor finds that the existing technology has at least the following problems：
The scale remover that the prior art provides easily residual in the earth formation, secondary pollution is caused to stratum.
Invention content
Technical problem to be solved of the embodiment of the present invention is that providing one kind can depth scale removal but also effective anti-corrosion
And the water injection well scale remover and its preparation method and application for being easy the row of returning.Specific technical solution is as follows：
In a first aspect, providing a kind of water injection well scale remover, include the component of following mass percentage：Dirty lytic agent
25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1- methyl anyl alcohols；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive is in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium
It is at least one；
The suspending agent is lignin.
Preferably, the water injection well scale remover includes the component of following mass percentage：Dirty lytic agent 32.5% divides
Powder 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is carboxymethyl cellulose；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive is the compounding of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium
Object, in the compound, dodecyl bromide pyridine, brocide and bromination octadecylpyridinium mass ratio
It is 1:1:1；
The suspending agent is lignin.
Second aspect provides the preparation method of above-mentioned water injection well scale remover, including：According to each group in water injection well scale remover
The proportioning divided, is added water in material-compound tank, and lytic agent and dispersant is then added into the material-compound tank again, after stirring evenly,
Corrosion inhibiter and cleanup additive is added into the material-compound tank again, after being again stirring for uniformly, then suspending agent is added into the material-compound tank,
Obtain water injection well scale remover；
Wherein, the water injection well scale remover includes the component of following mass percentage：Dirty lytic agent 25-40%, dispersion
Agent 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1- methyl anyl alcohols；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive is in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium
It is at least one；
The suspending agent is lignin.
The third aspect provides the method for carrying out scale removal using above-mentioned water injection well scale remover, including：Add in injecting water
Enter water injection well scale remover, it is the 0.1-3% of the injection water weight to make the water injection well scale remover weight, is obtained containing water injection well
The injection water of scale remover；
The injection water containing water injection well scale remover is injected into stratum using water injection well, after reacting 2-4 hours, is returned
Row completes water injection well scale removal process.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The water injection well scale remover of component and proportioning provided in an embodiment of the present invention with above-mentioned restriction has between each component
There is good compatibility, by the collaboration compatibility effect between each component, which can not only reach depth and remove
The purpose of dirt, and there is corrosion inhibitive function, reach effective corrosion-resistant purpose.Moreover, water injection well scale removal provided in an embodiment of the present invention
The aqueous solution surface tension of agent has the good row's of returning performance, will not cause secondary pollution to stratum between 18-21mN/m.
Specific implementation mode
To keep technical scheme of the present invention and advantage clearer, embodiment of the present invention will be made below further detailed
Thin description.
In a first aspect, providing a kind of water injection well scale remover, include the component of following mass percentage：Dirty lytic agent
25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Wherein, dirty lytic agent is the hydrochloric acid of a concentration of 25-37%；Dispersant is selected from carboxymethyl cellulose, dodecyl sulphur
At least one of sour sodium, 1- methyl anyl alcohols；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is selected from bromination dodecyl
At least one of pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.
Wherein, dirty lytic agent can play scale removal solubilization；Dispersant plays the role of promoting dispersion, improves mobility；It is slow
Erosion agent is played the role of reducing the chemical attack to equipment installation, ensures that acid solution reaches minimum to borehole wall extent of corrosion；Cleanup additive rises
The effect that row is returned to help work raffinate from stratum, can avoid the generation of secondary precipitation；Suspending agent, which plays, prevents working solution from decomposing,
The effect of precipitation can enhance system compatibility.
Based on it is above-mentioned it is found that component and proportioning provided in an embodiment of the present invention with above-mentioned restriction water injection well scale removal
Agent has good compatibility between each component, and by the collaboration compatibility effect between each component, which can
Achieve the purpose that depth scale removal, releases block in a short time, improve reservoir permeability, the fast normal water filling of quick-recovery.And this
Invention scale remover has corrosion inhibitive function, will corrode caused by waterflood-transmission line and equipment and minimize, and reach effective corrosion-resistant mesh
's.Further, the aqueous solution surface tension of water injection well scale remover of the present invention has the good row of returning between 18-21mN/m
Performance is easy to the row of returning, and is discharged from stratum conducive to work raffinate.In addition, scale remover adaptive type of the present invention is strong, to a variety of water injection wells
Dirt has certain scale removal effect.
In order to ensure scale remover of the present invention while there is preferable scale removal, anti-corrosion and the row's of returning ability, preferably, the water filling
Well scale remover includes the component of following mass percentage：Dirty lytic agent 32.5%, corrosion inhibiter 4.5%, helps dispersant 4.5%
Row's agent 4.5%, suspending agent 2%, surplus are water；
Wherein, dirty lytic agent is the hydrochloric acid of a concentration of 25-37%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is chlorination
Benzylquinolin quaternary ammonium salt；Cleanup additive is dodecyl bromide pyridine, brocide and bromination octadecylpyridinium
Compound, in the compound, dodecyl bromide pyridine, brocide and bromination octadecylpyridinium quality
Than being 1:1:1；Suspending agent is lignin.
Second aspect, an embodiment of the present invention provides the preparation methods of above-mentioned water injection well scale remover, including：According to water injection well
The proportioning of each component in scale remover, is added water in material-compound tank, and lytic agent and dispersant is then added into the material-compound tank again,
After stirring evenly, then corrosion inhibiter and cleanup additive are added into the material-compound tank, after being again stirring for uniformly, then into the material-compound tank
Suspending agent is added, obtains water injection well scale remover.
It is understood that the water injection well scale remover includes the component of following mass percentage：Dirty lytic agent 25-
40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water.Dirty lytic agent is concentration
For the hydrochloric acid of 25-37%；Dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1- methyl anyl alcohols；
Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is selected from dodecyl bromide pyridine, brocide, bromination ten
At least one of eight alkyl pyridines；Suspending agent is lignin.
The embodiment of the present invention prepares water injection well scale remover by above-mentioned method, and more conducively each component equably mixes, and protects
Its compatibility is demonstrate,proved, to which the desired water injection well scale remover of the embodiment of the present invention be prepared.
The third aspect is provided an embodiment of the present invention provides the application of above-mentioned water injection well scale remover using above-mentioned
Water injection well scale remover carry out scale removal method, including：Water injection well scale remover is added in injecting water, makes water injection well scale remover weight
Amount is the 0.1-3% of injection water weight, obtains the injection water containing water injection well scale remover；
The injection water for containing water injection well scale remover is injected into stratum using water injection well, after reacting 2-4 hours, is returned
Row completes water injection well scale removal process.
The embodiment of the present invention applies water injection well scale remover using the above method, makes the application of the scale remover simply just
Victory improves scale removal efficiency.Moreover, by being defined to proportioning of the scale remover in injecting water, to ensure reaching good
While scale removal, anti-corrosion effect, the waste of scale remover is not caused.Preferably, above-mentioned water injection well scale remover weight is injection water
The 2% of weight.
It is understood that above-mentioned in the embodiment of the present invention " contain this using water injection well the note of water injection well scale remover
Enter water injection stratum " and " row of returning " process be state of the art, those skilled in the art are according to this field routine hand
Section can carry out aforesaid operations.
The present invention will be further described through by specific embodiment below.
Condition person is not specified in following specific examples, is carried out according to normal condition.It is raw materials used that production is not specified
Manufacturer and specification person are can be with conventional products that are commercially available.
Embodiment 1
A kind of water injection well scale remover is present embodiments provided, the component of following mass percentage is included：Dirty lytic agent
25%, dispersant 3%, corrosion inhibiter 3%, cleanup additive 3%, suspending agent 1%, surplus are water；
Wherein, the hydrochloric acid that dirty lytic agent is a concentration of 25%；Dispersant is lauryl sodium sulfate；Corrosion inhibiter is；The row of helping
Agent is dodecyl bromide pyridine；Suspending agent is lignin.
The preparation method of the water injection well scale remover is as follows：According to the proportioning of each component in water injection well scale remover, with stirring
It mixes and water is added in the material-compound tank of device, lytic agent and dispersant is then added into material-compound tank again, after stirring evenly, then to material-compound tank
Middle addition corrosion inhibiter and cleanup additive after being again stirring for uniformly, then suspending agent are added into material-compound tank, it is desired to obtain the present embodiment
Water injection well scale remover.
Embodiment 2
A kind of water injection well scale remover is present embodiments provided, the component of following mass percentage is included：Dirty lytic agent
40%, dispersant 6%, corrosion inhibiter 6%, cleanup additive 6%, suspending agent 3%, surplus are water；
Wherein, the hydrochloric acid that dirty lytic agent is a concentration of 37%；Dispersant is 1- methyl anyl alcohols；Corrosion inhibiter is zephiran chloride quinoline
Hyamine；Cleanup additive is brocide；Suspending agent is lignin.
The preparation method of the water injection well scale remover is as follows：According to the proportioning of each component in water injection well scale remover, with stirring
It mixes and water is added in the material-compound tank of device, lytic agent and dispersant is then added into material-compound tank again, after stirring evenly, then to material-compound tank
Middle addition corrosion inhibiter and cleanup additive after being again stirring for uniformly, then suspending agent are added into material-compound tank, it is desired to obtain the present embodiment
Water injection well scale remover.
Embodiment 3
A kind of water injection well scale remover is present embodiments provided, the component of following mass percentage is included：Dirty lytic agent
32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Wherein, the hydrochloric acid that dirty lytic agent is a concentration of 32%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is zephiran chloride
Quinoline quaternary ammonium salt；Cleanup additive is the compounding of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium
Object, in the compound, dodecyl bromide pyridine, brocide and bromination octadecylpyridinium mass ratio
It is 1:1:1；Suspending agent is lignin.
The preparation method of the water injection well scale remover is as follows：According to the proportioning of each component in water injection well scale remover, with stirring
It mixes and water is added in the material-compound tank of device, lytic agent and dispersant is then added into material-compound tank again, after stirring evenly, then to material-compound tank
Middle addition corrosion inhibiter and cleanup additive after being again stirring for uniformly, then suspending agent are added into material-compound tank, it is desired to obtain the present embodiment
Water injection well scale remover.
Embodiment 4
The water injection well scale remover that the present embodiment is provided using embodiment 1-3 is respectively to 10-86 regional in North China Oilfield Ji
Well, 31-4 wells and 10-126X wells carry out dirty removing processing, and are determined with regard to related data therein.
Concrete operation step is as follows：Injection water distributing room for water injection with high-pressure pump in scheduled ratio shown in table 1 by water filling
Well scale remover is pumped into pressure duct, and as injection water injects stratum.After 4 hours, work raffinate is subjected to the row of returning.
Operating parameter and experimental result in experimentation is as shown in table 1.
Table 1
As shown in Table 1, scale remover provided in an embodiment of the present invention effectively can carry out scale removal to water injection well in oil fields, release stifled
Plug improves reservoir permeability, the fast normal water filling of quick-recovery, and improves water injection rate, has excellent anti-scaling function.The present invention is implemented
The scale remover that example provides also has excellent anti-corrosion function, effectively slows down the corrosion of waterflood-transmission line and equipment.Moreover, the present invention is real
The scale remover surface tension in aqueous solution for applying example offer is very small, is more conducive to the row of returning, avoid cause in the earth formation it is secondary
Pollution.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (5)
1. a kind of water injection well scale remover, includes the component of following mass percentage：Dirty lytic agent 25-40%, dispersant 3-
6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1- methyl anyl alcohols；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium at least
It is a kind of；
The suspending agent is lignin.
2. water injection well scale remover according to claim 1, which is characterized in that the water injection well scale remover includes following quality
The component of percentage composition：Dirty lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%,
Surplus is water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is carboxymethyl cellulose；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium,
In the compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is
1:1:1；
The suspending agent is lignin.
3. a kind of preparation method of water injection well scale remover described in claim 1, including：According to each component in water injection well scale remover
Proportioning, water is added in material-compound tank, dirty lytic agent and dispersant is then added into the material-compound tank again, after stirring evenly,
Corrosion inhibiter and cleanup additive is added into the material-compound tank again, after being again stirring for uniformly, then suspending agent is added into the material-compound tank,
Obtain water injection well scale remover；
Wherein, the water injection well scale remover includes the component of following mass percentage：Dirty lytic agent 25-40%, dispersant 3-
6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
The hydrochloric acid that the dirt lytic agent is a concentration of 25-37%；
The dispersant is selected from least one of carboxymethyl cellulose, lauryl sodium sulfate, 1- methyl anyl alcohols；
The corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
The cleanup additive in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium at least
It is a kind of；
The suspending agent is lignin.
4. the method for carrying out scale removal using the water injection well scale remover described in claims 1 or 22, including：Note is added in injecting water
Well scale remover, it is the 0.1-3% of the injection water weight to make the water injection well scale remover weight, is obtained containing water injection well scale removal
The injection water of agent；
The injection water containing water injection well scale remover is injected into stratum using water injection well, after reacting 2-4 hours, carries out the row of returning,
Complete water injection well scale removal process.
5. according to the method described in claim 4, it is characterized in that, the water injection well scale remover weight is the injection water weight
2%.
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| 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 |
| CN113337262B (en) * | 2021-06-07 | 2022-05-03 | 中国石油化工股份有限公司 | Composite descaling method for split-injection water injection well |
| 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 |
| CN114806529B (en) * | 2022-05-31 | 2023-07-28 | 中国石油化工股份有限公司 | Scale dissolving cosolvent and preparation method thereof |
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