CN105238379B - A kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and application method - Google Patents
A kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and application method Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 165
- 230000007797 corrosion Effects 0.000 title claims abstract description 165
- 230000020477 pH reduction Effects 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 238000000034 method Methods 0.000 title abstract description 8
- 239000002671 adjuvant Substances 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 31
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000006184 cosolvent Substances 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 239000002253 acid Substances 0.000 claims abstract description 23
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 23
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 23
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims abstract description 20
- 150000002462 imidazolines Chemical class 0.000 claims abstract description 19
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- RAXXELZNTBOGNW-UHFFFAOYSA-N 1H-imidazole Chemical compound C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000001412 amines Chemical class 0.000 claims abstract description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 10
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 8
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000005642 Oleic acid Substances 0.000 claims abstract description 8
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 8
- XJWSAJYUBXQQDR-UHFFFAOYSA-M dodecyltrimethylammonium bromide Chemical group [Br-].CCCCCCCCCCCC[N+](C)(C)C XJWSAJYUBXQQDR-UHFFFAOYSA-M 0.000 claims abstract description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 238000005829 trimerization reaction Methods 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 30
- 239000000203 mixture Substances 0.000 description 16
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 8
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 8
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- BKEOXUSOEGMVTL-UHFFFAOYSA-N trimethyl-$l^{3}-bromane Chemical compound CBr(C)C BKEOXUSOEGMVTL-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000013329 compounding Methods 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000116 mitigating effect Effects 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical group O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- AISMNBXOJRHCIA-UHFFFAOYSA-N trimethylazanium;bromide Chemical compound Br.CN(C)C AISMNBXOJRHCIA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a kind of long-acting corrosion inhibiter of acidification of gas well and its preparation methods and application method, and by mass percentage, which is formulated by following components：Corrosion inhibiter host agent：10~20%, corrosion inhibiter adjuvant：10~20%, molybdate：4~10%, cosolvent：5~15%, solvent：35~71%, wherein corrosion inhibiter host agent is dodecyl trimethyl ammonium bromide, and corrosion inhibiter adjuvant is oleic acid base amine ethyl imidazol(e) quinoline or oily acid based imidazolines, molybdate are the compound of sodium molybdate or sodium molybdate and sodium tripolyphosphate, and cosolvent is n-butanol, and solvent is water.The acidification of gas well is high with the corrosion inhibition rate under long-acting corrosion inhibiter high temperature, green, environmental protection, there is after acidification of gas well is exploited and is acidified during the row of returning good tubing and casing corrosion protection effect, it can ensure the normal production and sustainable development in gas field, not only there is significant economic benefit, and there is important social benefit, there is good popularizing application prospect.
Description
Technical field
The invention belongs to corrosion inhibiter fields, and in particular to a kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and make
Use method.
Background technology
Acidification is to utilize dissolving and corrosion of the acid solution to tamper in rock cement or formation pore, crack, extensive
Multiple or raising gas-bearing formation permeability, realizes the technical measures of oil/gas well stimulation.In the acidization of gas field, in the prevalence of more serious
Etching problem, had brought tremendous economic losses to production, and lead to environmental pollution.
Corrosion inhibiter used at present is lost in the problems such as serious there are long-term effect difference and on stratum, especially returns row in residual acid solution
When, steel surface causes construction cost to increase by heavy corrosion.
Based on the above situation, it is necessary to novel long-term effect acidification corrosion inhibitor is developed, to realize acidification of gas well process
The new breakthrough of middle corrosion inhibiter.
Invention content
The purpose of the present invention is to provide a kind of long-acting corrosion inhibiter of acidification of gas well and its preparation methods and application method, should
Corrosion inhibiter has good tubing and casing corrosion protection effect after acidification of gas well is exploited and is acidified during the row of returning.
In order to achieve the above objectives, the technical solution adopted by the present invention is：
A kind of long-acting corrosion inhibiter of acidification of gas well, by mass percentage, which is formulated by following components：
Wherein, corrosion inhibiter host agent is dodecyl trimethyl ammonium bromide, and corrosion inhibiter adjuvant is oleic acid base amine ethyl imidazol(e) quinoline
Or oily acid based imidazolines, molybdate are the compound of sodium molybdate or sodium molybdate and sodium tripolyphosphate, cosolvent is n-butanol, solvent
For water.
In the compound of the sodium molybdate and sodium tripolyphosphate the mass ratio of sodium molybdate and sodium tripolyphosphate be (0.8~
1.2):1。
By mass percentage, which is formulated by following components：Corrosion inhibiter host agent 15%, corrosion inhibiter adjuvant
15%, molybdate 6%, cosolvent 10%, solvent 54%, wherein corrosion inhibiter adjuvant are oily acid based imidazolines, and molybdate is molybdic acid
Sodium.
By mass percentage, which is formulated by following components：Corrosion inhibiter host agent 18%, corrosion inhibiter adjuvant
12%, molybdate 6%, cosolvent 14%, solvent 50%, wherein corrosion inhibiter adjuvant are oleic acid base amine ethyl imidazol(e) quinoline, molybdate
For sodium molybdate.
By mass percentage, which is formulated by following components：Corrosion inhibiter host agent 14%, corrosion inhibiter adjuvant
16%, molybdate 6%, cosolvent 11%, solvent 53%, wherein corrosion inhibiter adjuvant are oily acid based imidazolines, and molybdate is molybdic acid
Sodium.
By mass percentage, which is formulated by following components：Corrosion inhibiter host agent 14%, corrosion inhibiter adjuvant
12%, molybdate 6%, cosolvent 12%, solvent 56%, wherein corrosion inhibiter adjuvant are oleic acid base amine ethyl imidazol(e) quinoline, molybdate
It is 1 for mass ratio:1 sodium molybdate and the compound of sodium tripolyphosphate.
By mass percentage, which is formulated by following components：Corrosion inhibiter host agent 16%, corrosion inhibiter adjuvant
14%, molybdate 8%, cosolvent 10%, solvent 52%, wherein corrosion inhibiter adjuvant are oily acid based imidazolines, and molybdate is quality
Than being 1:1 sodium molybdate and the compound of sodium tripolyphosphate.
The acidification of gas well preparation method of long-acting corrosion inhibiter, is as follows：First solvent and cosolvent are mixed and stirred
It mixes uniformly, corrosion inhibiter host agent is then added, stirring makes it be uniformly dispersed, and adds corrosion inhibiter adjuvant, and stirring makes it be uniformly dispersed,
It is eventually adding molybdate, stirring makes it be uniformly dispersed to get to the long-acting corrosion inhibiter of acidification of gas well.
The acidification of gas well application method of long-acting corrosion inhibiter, is as follows：It is in mass ratio (0.3~3):100 to
The long-acting corrosion inhibiter of acidification of gas well is added in acidifying solution, is used after stirring evenly, carries out acidification of gas well processing, or refined
Pipe pickling in factory, boiler or steel mill's industry.
Compared with the existing technology, beneficial effects of the present invention are：
The present invention provides a kind of long-acting corrosion inhibiter of acidification of gas well by MOLECULE DESIGN and chemical compounding principle, this is slow
It is good to lose agent long-term effect, has the characteristics that dosage is few, have a wide range of application, is good with acid solution compatibility, being opened especially suitable for acidification of gas well
Tubing and casing corrosion protection after adopting and being acidified during the row of returning.And the corrosion inhibition rate under the corrosion inhibiter high temperature is high, green, environmental protection,
It can inhibit corrosion of the strong acid to tubing and casing well during acidification of gas well and the row of returning, so as to ensure the normal of gas field
Production and sustainable development.Well acidizing provided by the invention is realized new to corrosion inhibiter during acidification of gas well with long-acting corrosion inhibiter
Breakthrough, not only have significant economic benefit, but also have important social benefit, have good popularizing application prospect.
In addition, well acidizing provided by the invention can not only be used during acidification of gas well for oil pipe protection with long-acting corrosion inhibiter,
It can be promoted the use of in the pipe pickling of the industries such as refinery, boiler, steel mill.
Acidification of gas well provided by the invention is simple and easy to operate with long-acting inhibitor preparation method, and solvent is mixed with cosolvent
After sequentially add corrosion inhibiter host agent, corrosion inhibiter adjuvant and molybdate, be uniformly dispersed.Therefore the long-acting inhibition of the acidification of gas well
The production of agent is very convenient, and required instrument and equipment is few, and production cost is low, is fully compatible for industrialization large-scale production.
Specific implementation mode
The present invention is described in further details below.
In order to examine the corrosion mitigating effect of this corrosion inhibiter, the stationary-mobile state prepared present invention employs 340atm nickel-base alloys is high
Warm autoclave, with reference to SY5405-1996 acidifications corrosion inhibiter method for testing performance and evaluation index, the gas well that the present invention is prepared
Acidification is evaluated with the corrosion mitigating effect of long-acting corrosion inhibiter.
Embodiment 1
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 15%,
Corrosion inhibiter adjuvant 15%, molybdate 6%, cosolvent 10%, solvent 54%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oily acid based imidazolines, and molybdate is sodium molybdate, and cosolvent is n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 270g water and 50g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 75g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 75g oil in the mixture
Acid based imidazolines make it be uniformly dispersed；4. being slow added into 30g sodium molybdates；5. at the uniform velocity stirring 0.5h with 500r/min makes its point
It dissipates uniformly to get the long-acting corrosion inhibiter of the acidification of gas well.
The long-acting corrosion inhibiter of the acidification of gas well that embodiment 1 is prepared is added 90 DEG C, in the acidifying solution of 20%HCl (weight),
It stirs evenly, is configured to the corrosion inhibiter souring soln of various concentration, is then tested, for the evaluation result of 80S steel, experiment
Period is 4 hours, and the results are shown in Table 1.
The corrosion inhibition rate of corrosion inhibiter under 1 various concentration of table
| Density of corrosion inhibitor, % (weight) | Corrosion rate, g/ (m2·h) | Corrosion inhibition rate, % |
| 0 | 657.13 | - |
| 0.3 | 1.62 | 99.75 |
| 1 | 1.37 | 99.79 |
| 1.5 | 1.15 | 99.82 |
| 2 | 0.96 | 99.85 |
It can be seen from Table 1 that compared with not adding corrosion inhibiter, the addition acidification of gas well long-acting inhibition of the invention prepared
Corrosion inhibition rate after agent can reach 99% or more, and it is extraordinary slow to illustrate that the long-acting corrosion inhibiter of acidification of gas well provided by the invention has
Lose effect.
Embodiment 2
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 18%,
Corrosion inhibiter adjuvant 12%, molybdate 6%, cosolvent 14%, solvent 50%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is sodium molybdate, and cosolvent is n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 250g water and 70g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 90g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 60g oil in the mixture
Acidic group amine ethyl imidazol(e) quinoline, makes it be uniformly dispersed；4. being slow added into 30g sodium molybdates；5. at the uniform velocity stirring 0.5h with 500r/min
It is set to be uniformly dispersed up to the long-acting corrosion inhibiter of the acidification of gas well.
Table 2 gives under different temperatures, and the acidification of gas well that embodiment 2 is prepared is with long-acting corrosion inhibiter in 20%HCl (weight)
In solution, for the evaluation result of 80S steel, the test period is 4 hours.
The corrosion inhibition rate of 2 corrosion inhibiter 0.3% (weight) of table at different temperatures
It can be seen from Table 2 that the acidification of gas well that the present invention prepares shows extraordinary inhibition with long-acting corrosion inhibiter and imitates
Fruit, and its slow release effect is better than the first class index in table 6 and table 7.
Embodiment 3
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 14%,
Corrosion inhibiter adjuvant 12%, molybdate 6%, cosolvent 12%, solvent 56%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is that mass ratio is 1:1 sodium molybdate and sodium tripolyphosphate
Compound, cosolvent are n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 280g water and 60g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 70g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 60g oil in the mixture
Acidic group amine ethyl imidazol(e) quinoline, makes it be uniformly dispersed；4. being slow added into the 1 of 30g sodium molybdates and sodium tripolyphosphate:1 mass ratio
Compound；It is set to be uniformly dispersed up to the long-acting corrosion inhibiter of the acidification of gas well 5. at the uniform velocity stirring 0.5h with 500r/min.
The long-acting corrosion inhibiter of the acidification of gas well that embodiment 3 is prepared is added 90 DEG C, in the acidifying solution of 20%HCl (weight),
It stirs evenly, is configured to the corrosion inhibiter souring soln of a concentration of 1% (weight), is then tested, for commenting for unlike material
Valence is as a result, the test period is 4 hours, and the results are shown in Table 3.
Corrosion inhibition rate of 3 corrosion inhibiter of table to unlike material
| Material | Blank rate of corrosion, g/ (m2·h) | Corrosion rate, g/ (m2·h) | Corrosion inhibition rate, % |
| P110 | 653.46 | 2.34 | 99.64 |
| 80S | 657.13 | 1.62 | 99.75 |
| S135 | 613.02 | 2.71 | 99.56 |
It can be seen from Table 3 that the acidification of gas well prepared of the present invention with long-acting corrosion inhibiter to P110,80S and S135 uniformly very
Good corrosion mitigating effect.
Embodiment 4
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 16%,
Corrosion inhibiter adjuvant 14%, molybdate 8%, cosolvent 10%, solvent 52%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oily acid based imidazolines, and molybdate is that mass ratio is 1:1 sodium molybdate and the compounding of sodium tripolyphosphate
Object, cosolvent are n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 260g water and 50g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 80g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 70g oil in the mixture
Acid based imidazolines make it be uniformly dispersed；4. being slow added into the 1 of 40g sodium molybdates and sodium tripolyphosphate:The compounding of 1 mass ratio
Object；It is set to be uniformly dispersed up to the long-acting corrosion inhibiter of the acidification of gas well 5. at the uniform velocity stirring 0.5h with 500r/min.
Table 4 gives under different temperatures, and the acidification of gas well that embodiment 4 is prepared is with long-acting corrosion inhibiter in 20%HCl (weight)
In solution, for the evaluation result of N80 steel, the test period is 4 hours.
The inhibition efficiency of 4 corrosion inhibiter 0.3% (weight) of table at different temperatures
It can be seen from Table 4 that the acidification of gas well that the present invention prepares is showing extraordinary inhibition with long-acting corrosion inhibiter
Slow release effect under effect, especially high temperature is better than the first class index in table 7.
Embodiment 5
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 14%,
Corrosion inhibiter adjuvant 16%, molybdate 6%, cosolvent 11%, solvent 53%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oily acid based imidazolines, and molybdate is sodium molybdate, and cosolvent is n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 265g water and 55g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 70g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 80g oil in the mixture
Acid based imidazolines make it be uniformly dispersed；4. being slow added into 30g sodium molybdates；5. at the uniform velocity stirring 0.5h with 500r/min makes its point
It dissipates uniformly up to the long-acting corrosion inhibiter of the acidification of gas well.
Table 5 gives various concentration corrosion inhibiter in 90 DEG C, 20%HCl (weight) solution, for the evaluation knot of 80S steel
Fruit, test period are 8 hours.
The corrosion inhibition rate of 5 various concentration corrosion inhibiter of table
| Density of corrosion inhibitor, % (weight) | Corrosion rate, g/ (m2·h) | Corrosion inhibition rate, % |
| 0 | 942.15 | - |
| 0.3 | 3.11 | 99.67 |
| 1 | 2.96 | 99.69 |
| 1.5 | 2.47 | 99.74 |
| 2 | 2.30 | 99.76 |
Table 5 and table 1 are compared, it can be seen that 8 hours corrosion inhibition rates only had very small compared to 4 hours corrosion inhibition rates
It reduces, illustrates that the long-term effect for the long-acting corrosion inhibiter of acidification of gas well that the present invention prepares is very good.
Embodiment 6
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 10%,
Corrosion inhibiter adjuvant 10%, molybdate 4%, cosolvent 5%, solvent 71%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oily acid based imidazolines, and molybdate is sodium molybdate, and cosolvent is n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 355g water and 25g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 50g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 50g oil in the mixture
Acid based imidazolines make it be uniformly dispersed；4. being slow added into 20g sodium molybdates；5. at the uniform velocity stirring 0.5h with 500r/min makes its point
It dissipates uniformly up to the long-acting corrosion inhibiter of the acidification of gas well.
Embodiment 7
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 20%,
Corrosion inhibiter adjuvant 20%, molybdate 10%, cosolvent 15%, solvent 35%, wherein corrosion inhibiter host agent are trimethyl
Ammonium bromide, corrosion inhibiter adjuvant are oily acid based imidazolines, and molybdate is that mass ratio is 1.2:1 sodium molybdate and sodium tripolyphosphate are answered
With object, cosolvent is n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 175g water and 75g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 100g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 100g in the mixture
Oily acid based imidazolines, make it be uniformly dispersed；4. being slow added into the 1.2 of 50g sodium molybdates and sodium tripolyphosphate:1 mass ratio
Compound；It is set to be uniformly dispersed up to the long-acting corrosion inhibiter of the acidification of gas well 5. at the uniform velocity stirring 0.5h with 500r/min.
Embodiment 8
By mass percentage, acidification of gas well is formulated with long-acting corrosion inhibiter by following components：Corrosion inhibiter host agent 12%,
Corrosion inhibiter adjuvant 18%, molybdate 5%, cosolvent 7%, solvent 58%, wherein corrosion inhibiter host agent are trimethyl bromine
Change ammonium, corrosion inhibiter adjuvant is oily acid based imidazolines, and molybdate is that mass ratio is 0.8:1 sodium molybdate and the compounding of sodium tripolyphosphate
Object, cosolvent are n-butanol, and solvent is water.
The above-mentioned acidification of gas well preparation method of long-acting corrosion inhibiter, includes the following steps：
1. 290g water and 35g n-butanols are added in 1L beakers, stir evenly；2. being slowly added to 60g dodecyl front threes
Base ammonium bromide, 300r/min at the uniform velocity stir 5min, it is made to be uniformly dispersed, and obtain mixture；3. being slowly added to 90g oil in the mixture
Acid based imidazolines make it be uniformly dispersed；4. being slow added into the 0.8 of 25g sodium molybdates and sodium tripolyphosphate:1 mass ratio is answered
With object；It is set to be uniformly dispersed up to the long-acting corrosion inhibiter of the acidification of gas well 5. at the uniform velocity stirring 0.5h with 500r/min.
Annex：The content of table 6 and table 7 is the reference value in petroleum industry standard SY/T 5405-1996.
6 normal pressure static etch rate determination condition of table and corrosion inhibiter evaluation index
7 high temperature and pressure Dynamic Corrosion rate determination condition of table and corrosion inhibiter evaluation index
Claims (4)
1. a kind of long-acting corrosion inhibiter of acidification of gas well, it is characterised in that：By mass percentage, which is matched by following components
It makes：
Wherein, corrosion inhibiter host agent is dodecyl trimethyl ammonium bromide, and corrosion inhibiter adjuvant is oleic acid base amine ethyl imidazol(e) quinoline or oil
Acid based imidazolines, cosolvent are n-butanol, and solvent is water.
2. the long-acting corrosion inhibiter of acidification of gas well according to claim 1, it is characterised in that：The sodium molybdate and trimerization phosphorus
The mass ratio of sodium molybdate and sodium tripolyphosphate is (0.8~1.2) in the compound of sour sodium:1.
3. the long-acting corrosion inhibiter of acidification of gas well according to claim 2, it is characterised in that：By mass percentage, this is slow
Erosion agent is formulated by following components：Corrosion inhibiter host agent 14%, corrosion inhibiter adjuvant 12%, molybdate 6%, cosolvent 12% are molten
Agent 56%, wherein corrosion inhibiter adjuvant are oleic acid base amine ethyl imidazol(e) quinoline, in the compound of the sodium molybdate and sodium tripolyphosphate
The mass ratio of sodium molybdate and sodium tripolyphosphate is 1:1.
4. the long-acting corrosion inhibiter of acidification of gas well according to claim 2, it is characterised in that：By mass percentage, this is slow
Erosion agent is formulated by following components：Corrosion inhibiter host agent 16%, corrosion inhibiter adjuvant 14%, molybdate 8%, cosolvent 10% are molten
Agent 52%, wherein corrosion inhibiter adjuvant are oily acid based imidazolines, sodium molybdate in the compound of the sodium molybdate and sodium tripolyphosphate
Mass ratio with sodium tripolyphosphate is 1:1.
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