CN106145397A - A kind of oilfield injection water neutral corrosion inhibiting and descaling agent and preparation and application thereof - Google Patents
A kind of oilfield injection water neutral corrosion inhibiting and descaling agent and preparation and application thereof Download PDFInfo
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- CN106145397A CN106145397A CN201610633084.1A CN201610633084A CN106145397A CN 106145397 A CN106145397 A CN 106145397A CN 201610633084 A CN201610633084 A CN 201610633084A CN 106145397 A CN106145397 A CN 106145397A
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- descaling agent
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/141—Amines; Quaternary ammonium compounds
- C23F11/143—Salts of amines
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention belongs to oil gas field technical field of chemistry, open a kind of oilfield injection water neutrality corrosion inhibiting and descaling agent, by weight percentage, the inventory accounting of each component is: pyridine quaternary ammonium salt corrosion inhibiter HSI 18%～10%, carboxyethyl amphoteric imidazoline 10%～12%, poly (sodium aspartate) 28%～30%, hexapotassium potassium salt 6%～8%, 1-hydroxy ethylidene-1,1-diphosphonic acid disodium 2%～3%, polyamino many ethers methylenephosphonic acid 2%～3%, water 34%～44%.The pH value range of this corrosion inhibiting and descaling agent is 6～8, have consumption little, in neutrality, environmental friendliness, the feature such as biodegradable, can effectively suppress to inject the corrosion to tubing such as water, recovered water, suppress calcium carbonate scale, the generation of calcium sulfate scale, extend the cycle of maintenance pump, ensure that oil field produces.
Description
Technical field
The invention belongs to oil gas field technical field of chemistry, be specifically related to the neutral corrosion inhibiting and descaling agent of a kind of oilfield injection water,
It is mainly used in suppression and injects the corrosion to tubing such as water, suppress calcium carbonate scale, the generation of calcium sulfate scale, delay the formation scaling cycle
With pipeline replacement cycle, the production of guarantee oil field.
Background technology
Water injection well in oil fields corrosion generally exists with scale formation, has a strong impact on oil field and produces.In oilfield development process, for
Guarantee that oil reservoir has enough pressure, it is ensured that the production efficiency in oil field, water filling be the most frequently used be also the skill that range of application is the widest
One of art.Inject water source and mainly include treated Oil/gas Well recovered water, well recovered water, clear water etc..Adopting after process
Containing substantial amounts of one-tenth dirt ion in water outlet, well recovered water, cause between various mixed water injection water, to inject between water and formation water
There is serious being incompatible, cation such as Ca2+、Mg2+、Ba2+、Sr2+Deng and anion such as CO3 2-、HCO3 -、SO4 2-Deposit in a large number
, scaling tendency is serious.Along with the content of material such as calcium carbonate, calcium sulfate sharply increases, scale formation occurs, along with amount of scale buildup
Increasing, block stratum, reduce in-place permeability, cause serious formation damage, oil recovery factor decreases.It addition, pit shaft
Middle fouling can hinder the flowing space of pipeline, increases flow resistance.
Meanwhile, inject in water and there is a certain amount of corrosive ion, such as chlorine root etc., pit shaft can be caused corrosion.Fouling will
Further result in underdeposit corrosion and form serious local corrosion, increase the extent of corrosion of down-hole facility.Corrosion combines with fouling,
Shortening the service life injecting well facility further, situation seriously will result in large-area stopping production.
In the various dirts formed, calcium carbonate scale and calcium sulfate scale are the most common dirts being also to be easiest to appearance, and it is right
The impact injecting well is the most serious.Present stage oil field for dirt treating method be mainly scale removal, scale inhibition.Wherein, scale inhibition is
Conventional is also relative most efficient method.Currently used corrosion inhibiting and descaling agent is many based on organic phosphoric acid and many in stronger acids,
Itself there is stronger corrosivity, there is certain limitation.
Finding through investigation, the poly (sodium aspartate) of polycarboxylate apoplexy due to endogenous wind is green, the corrosion inhibiting and descaling agent of bio-degradable, with
Organic phospho acid salt is compounding uses scale inhibition effect good；Amphoteric imidazoline corrosion inhibiter is also that one can be with biodegradable inhibition
Agent, suppresses the corrosive effect such as high salinity, hydrogen sulfide good after compounding with pyridine quaternary ammonium salt corrosion inhibiter HSI-1.By said components
After the most compounding, the neutral corrosion inhibiting and descaling agent of a kind of oilfield injection water can be obtained.
Summary of the invention
The technical problem to be solved in the present invention: the existing corrosion inhibiting and descaling agent based on organic phosphoric acid, how in stronger acids, tool
There is stronger corrosivity, cause the limitation that it is applied.The existence of this problem, the corrosion inhibiting and descaling agent for development of new provides
Opportunity.
Solve the problems referred to above technical scheme: the invention by pyridine quaternary ammonium salt corrosion inhibiter HSI-1, both sexes imidazoles
Quinoline, poly (sodium aspartate), dispersant and the organic compounded combination of multiple organic phosphonate, be developed into a kind of in neutral inhibition resistance
Dirt agent, for suppressing the corrosion injecting water etc. to tubing, suppresses calcium carbonate scale, the generation of calcium sulfate scale, delays formation scaling week
Phase and pipeline replacement cycle, ensure that oil field produces.Meanwhile, the present invention gives the preparation side of described neutral corrosion inhibiting and descaling agent
Method, and its application in terms of inhibition, scale inhibition.
Specifically, the present invention adopts the technical scheme that:
The present invention provides the neutral corrosion inhibiting and descaling agent of a kind of oilfield injection water.The neutral corrosion-mitigation scale-inhibition of this oilfield injection water
Agent, is the mixed of pyridine quaternary ammonium salt corrosion inhibiter HSI-1, amphoteric imidazoline, poly (sodium aspartate), dispersant and multiple organic phosphonate
Compound.
A kind of oilfield injection water neutrality corrosion inhibiting and descaling agent, by weight percentage, the inventory accounting of each component is:
Further, the preparation method of the neutral corrosion inhibiting and descaling agent of described oilfield injection water, pump into after aqueous solvent is weighed
In reactor, weigh raw material hydroxyl ethylene-diphosphonic acid disodium and insert in reactor, start stirring, be slow added into raw material hexamethylene diamine
Four methylenephosphonic acid potassium salt, polyamino many ethers methylenephosphonic acid, poly (sodium aspartate), carboxyethyl amphoteric imidazoline, to be mixed uniformly
After add raw material pyridine quaternary ammonium salt corrosion inhibiter HSI-1, stir and can be prepared by the neutral inhibition resistance of described oilfield injection water
Dirt agent.
Especially, the neutral corrosion inhibiting and descaling agent of described oilfield injection water is neutrality, and its pH value range is 6～8.
Another aspect, the present invention be given the neutral corrosion inhibiting and descaling agent of this oilfield injection water in suppression water injection well fouling with
And the application of corrosion.
Especially, the neutral corrosion inhibiting and descaling agent of described oilfield injection water is used for suppressing to corrode in water injection well, its using method
For: carry out corrosion experiment evaluation according to on-the-spot extraction liquid measure, Produced Liquid composition, determine the neutral inhibition resistance of described oilfield injection water
The concentration of dirt agent, pumps into neutral for the described oilfield injection water after dilution corrosion inhibiting and descaling agent in water injection well well.
The neutral corrosion inhibiting and descaling agent of described oilfield injection water is used for suppressing to corrode in water injection well, it is preferable that its concentration
It is 50～100mg/L.
Especially, the neutral corrosion inhibiting and descaling agent of described oilfield injection water is used for suppressing fouling in water injection well, its using method
For: according to on-the-spot water determination ion component, carry out scale inhibition experimental evaluation, determine the neutral corrosion-mitigation scale-inhibition of described oilfield injection water
The concentration of agent, pumps into neutral for the described oilfield injection water after dilution corrosion inhibiting and descaling agent in water injection well well.
The neutral corrosion inhibiting and descaling agent of described oilfield injection water is used for suppressing fouling in water injection well, it is preferable that its concentration
It is 30～70mg/L.
The neutral corrosion inhibiting and descaling agent of oilfield injection water of the present invention, at least has following beneficial effect or an advantage:
According to the corrosion inhibiting and descaling agent standard evaluation requirement of Q/SY 126 oil field extracted water, through Lab-evaluation:
Corrosion rate is (without H2S/CO2): when Q/SY 126 simulates saline, temperature 50 C, add 50mg/L, 80mg/L,
During 100mg/L, Q236 steel corrosion speed is less than 0.076mm/y；
When calcium carbonate scale inhibition: Q/SY126 simulates saline, temperature 50 C, when adding 30mg/L, 50mg/L, 80mg/L,
CaCO3Dirt scale inhibition performance is more than 90%；
When calcium sulfate scale inhibition: Q/SY126 simulates saline, temperature 50 C, when adding 30mg/L, 50mg/L, 80mg/L,
CaSO4Dirt scale inhibition performance is more than 90%.
The neutral corrosion inhibiting and descaling agent of oilfield injection water of the present invention is mainly used in oil, natural gas extraction industry.By upper
State Lab-evaluation data it can be seen that this neutrality corrosion inhibiting and descaling agent can effectively suppress to inject the corrosion to tubing such as water, recovered water,
Suppression calcium carbonate scale, the generation of calcium sulfate scale, thus extend the cycle of maintenance pump.Meanwhile, this neutrality corrosion inhibiting and descaling agent has
Consumption is little, in neutrality, environmental friendliness, the feature such as biodegradable.
Celebrating each oil field development deeply along with long, commonly used water injection well is developed, and Partial Block uses Advance Water Injection etc., injects
Day by day serious, the pit shaft corrosion of water scale formation aggravates, can not be ignored.Use oilfield injection water of the present invention neutral inhibition resistance
Dirt agent, can effectively suppress pit shaft burn into suppression calcium carbonate scale and the formation of calcium sulfate scale, it is ensured that oil field produces.
Detailed description of the invention
Below by example, the present invention will be further described, it should be noted that following example be only the present invention its
In example, do not represent the rights protection scope that the present invention is limited, the scope of the present invention with claims is
Accurate.
For the effect of checking neutral corrosion inhibiting and descaling agent of the present invention, corrosion rate and antisludging agent test with reference to CNPC
Natural gas group company company standard " Q/SY126-2014 oil field water processes and uses corrosion inhibiting and descaling agent technical specification " is (containing the present embodiment
Described appendix A, Appendix B) perform.
Corrosion rate evaluation methodology, with reference to Appendix B corrosion rate mensuration (not sulfide hydrogen, without carbon dioxide corrosion
The mensuration of speed) carry out.Experiment corrosive medium is Q/SY126-2014 simulation water: 50gNaCl, 2.0gMgCl2·6H2O、
6.0gNaSO4, the anhydrous CaCl of 4g2, 0.4g NaHCO3.Experiment material is steel test piece (model: Q235, specification: 50mm × 10mm
×3mm)。
Scale inhibition performance method of testing, measures with reference to calcium carbonate scale inhibition performance in appendix A and calcium sulfate scale inhibition performance measures and carries out.
Embodiment 1
The present embodiment provides the composition of a kind of preferred described neutral corrosion inhibiting and descaling agent, by weight percentage, each component
Inventory accounting be:
Pyridine quaternary ammonium salt corrosion inhibiter HIS-1 8%, carboxyethyl amphoteric imidazoline 10%, poly (sodium aspartate) 28%, oneself two
Amine four methylenephosphonic acid potassium salt 6%, 1-hydroxy ethylidene-1,1-diphosphonic acid disodium 2%, polyamino many ethers methylenephosphonic acid 2%, water 44%.
Preparation method: first weigh 440kg aqueous solvent and insert in reactor, weigh 20kg 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, limit
Stirring limit adds poly (sodium aspartate) 280kg, hexapotassium potassium salt 60kg, polyamino many ethers methylenephosphonic acid
20kg, carboxyethyl amphoteric imidazoline 100kg, be eventually adding pyridine quaternary ammonium salt corrosion inhibiter HIS-1 80kg.
Neutral corrosion inhibiting and descaling agent corrosion rate evaluation described in the present embodiment is shown in Table 1, and scale inhibition performance test result is shown in Table 2.
Table 1 weight-loss method evaluates different corrosion inhibiter experimental data table
Table 2 scale inhibition performance experimental data table
Embodiment 2
The present embodiment provides the composition of a kind of preferred described neutral corrosion inhibiting and descaling agent, by weight percentage, each component
Inventory accounting be:
Pyridine quaternary ammonium salt corrosion inhibiter HIS-1 8%, carboxyethyl amphoteric imidazoline 12%, poly (sodium aspartate) 30%, oneself two
Amine four methylenephosphonic acid potassium salt 6%, 1-hydroxy ethylidene-1,1-diphosphonic acid disodium 2%, polyamino many ethers methylenephosphonic acid 2%, solvent 40%.
Preparation method: first weigh 400kg aqueous solvent and insert in reactor, weigh 20kg 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, limit
Stirring limit adds poly (sodium aspartate) 300kg, hexapotassium potassium salt 60kg, polyamino many ethers methylenephosphonic acid
20kg, carboxyethyl amphoteric imidazoline 120kg, be eventually adding pyridine quaternary ammonium salt corrosion inhibiter HIS-1 80kg.
Neutral corrosion inhibiting and descaling agent corrosion rate evaluation described in the present embodiment is shown in Table 3, and scale inhibition performance test result is shown in Table 4.
Table 3 weight-loss method evaluates different corrosion inhibiter experimental data table
Table 4 scale inhibition performance experimental data table
Embodiment 3
The present embodiment provides the composition of a kind of preferred described neutral corrosion inhibiting and descaling agent, by weight percentage, each component
Inventory accounting be:
Pyridine quaternary ammonium salt corrosion inhibiter HIS-1 10%, carboxyethyl amphoteric imidazoline 12%, poly (sodium aspartate) 30%, oneself two
Amine four methylenephosphonic acid potassium salt 8%, 1-hydroxy ethylidene-1,1-diphosphonic acid disodium 3%, polyamino many ethers methylenephosphonic acid 3%, solvent 34%.
Preparation method: first weigh 340kg aqueous solvent and insert in reactor, weigh 30kg 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, limit
Stirring limit adds poly (sodium aspartate) 300kg, hexapotassium potassium salt 80kg, polyamino many ethers methylenephosphonic acid
30kg, carboxyethyl amphoteric imidazoline 120kg, be eventually adding pyridine quaternary ammonium salt corrosion inhibiter HIS-1 100kg.
Neutral corrosion inhibiting and descaling agent corrosion rate evaluation described in the present embodiment is shown in Table 5, and scale inhibition performance test result is shown in Table 6.
Table 5 weight-loss method evaluates different corrosion inhibiter experimental data table
Table 6 scale inhibition performance experimental data table
Embodiment 4
The present embodiment provides the composition of a kind of preferred described neutral corrosion inhibiting and descaling agent, by weight percentage, each component
Inventory accounting be:
Pyridine quaternary ammonium salt corrosion inhibiter HIS-1 9.5%, carboxyethyl amphoteric imidazoline 11%, poly (sodium aspartate) 29%, oneself
Diamidogen four methylenephosphonic acid potassium salt 7.5%, 1-hydroxy ethylidene-1,1-diphosphonic acid disodium 2.5%, polyamino many ethers methylenephosphonic acid 2.5%, molten
Agent 38%.
Preparation method: first weigh 380kg aqueous solvent and insert in reactor, weigh 25kg 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, limit
Stirring limit adds poly (sodium aspartate) 290kg, hexapotassium potassium salt 75kg, polyamino many ethers methylenephosphonic acid
25kg, carboxyethyl amphoteric imidazoline 110kg, be eventually adding pyridine quaternary ammonium salt corrosion inhibiter HIS-1 95kg.
Neutral corrosion inhibiting and descaling agent corrosion rate evaluation described in the present embodiment is shown in Table 7, and scale inhibition performance test result is shown in Table 8.
Table 7 weight-loss method evaluates different corrosion inhibiter experimental data table
Table 8 scale inhibition performance experimental data table
Known by above-mentioned experimental evaluation: when different formulations ratio, different corrosion inhibiting and descaling agents add concentration, all show
Go out good corrosion inhibition and scale-inhibiting properties, in four different embodiments, be 30mg/L, 50mg/ at corrosion inhibiting and descaling agent dosage
When L, 70mg/L, calcium carbonate scale inhibition performance is higher than 90%, and calcium sulfate scale inhibition performance is higher than 90%；It is 50mg/ at corrosion inhibiting and descaling agent dosage
When L, 70mg/L, 100mg/L, Q235 corrosion of steel speed is respectively less than 0.076mm/y；It is satisfied by " Q/SY126-2014 oil field water
Process and use corrosion inhibiting and descaling agent technical specification " related request.
Above in conjunction with embodiment, the present invention done further narration, but the present invention has been not limited to above-mentioned embodiment,
In the ken that one skilled in the relevant art is possessed, it is also possible to make on the premise of without departing from present inventive concept
Various changes.
Claims (8)
1. an oilfield injection water neutrality corrosion inhibiting and descaling agent, by weight percentage, the inventory accounting of each component is:
。
2. the oilfield injection water as claimed in claim 1 preparation method of neutral corrosion inhibiting and descaling agent, pumps into after aqueous solvent being weighed
In reactor, weigh raw material hydroxyl ethylene-diphosphonic acid disodium and insert in reactor, start stirring, be slow added into raw material hexamethylene diamine
Four methylenephosphonic acid potassium salt, polyamino many ethers methylenephosphonic acid, poly (sodium aspartate), carboxyethyl amphoteric imidazoline, to be mixed uniformly
After add raw material pyridine quaternary ammonium salt corrosion inhibiter HSI-1, stir and can be prepared by the neutral inhibition resistance of described oilfield injection water
Dirt agent.
3. the pH value range of the neutral corrosion inhibiting and descaling agent of oilfield injection water is 6～8 as claimed in claim 1 or 2.
4. as claimed in claim 3 oilfield injection water with neutral corrosion inhibiting and descaling agent in suppression water injection well fouling and corrosion should
With.
5. the neutral corrosion inhibiting and descaling agent of oilfield injection water is used for suppressing to corrode in water injection well as claimed in claim 4, its user
Method is: carry out corrosion experiment evaluation according to on-the-spot extraction liquid measure, Produced Liquid composition, determines the neutral inhibition of described oilfield injection water
The concentration of antisludging agent, pumps into neutral for the described oilfield injection water after dilution corrosion inhibiting and descaling agent in water injection well well.
6. the neutral corrosion inhibiting and descaling agent of oilfield injection water is used for suppressing to corrode in water injection well as claimed in claim 5, and its use is dense
Degree is 50～100mg/L.
7. the neutral corrosion inhibiting and descaling agent of oilfield injection water is used for suppressing fouling in water injection well as claimed in claim 4, its user
Method is: according to on-the-spot water determination ion component, carry out scale inhibition experimental evaluation, determines the neutral inhibition resistance of described oilfield injection water
The concentration of dirt agent, pumps into neutral for the described oilfield injection water after dilution corrosion inhibiting and descaling agent in water injection well well.
8. the neutral corrosion inhibiting and descaling agent of oilfield injection water is used for suppressing fouling in water injection well as claimed in claim 7, and its use is dense
Degree is 30～70mg/L.
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| CN113249104A (en) * | 2020-02-13 | 2021-08-13 | 中国石油天然气股份有限公司 | Scale inhibition and scale removal agent and preparation method thereof |
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