CN105238379A - Long-acting corrosion inhibitor for gas well acidification, preparation method and application method thereof - Google Patents
Long-acting corrosion inhibitor for gas well acidification, preparation method and application method thereof Download PDFInfo
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- CN105238379A CN105238379A CN201510634242.0A CN201510634242A CN105238379A CN 105238379 A CN105238379 A CN 105238379A CN 201510634242 A CN201510634242 A CN 201510634242A CN 105238379 A CN105238379 A CN 105238379A
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- 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
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- 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
Abstract
The invention discloses a long-acting corrosion inhibitor for gas well acidification, a preparation method and application method thereof. The corrosion inhibitor is composed of the following components in percentage by weight: 10 to 20% of corrosion inhibitor main agent, 10 to 20% of corrosion inhibitor auxiliary agent, 4 to 10% of molybdate, 5 to 15% of cosolvent, and 35 to 71% of solvent, wherein the corrosion inhibitor main agent is dodecyl trimethyl ammonium bromide, the corrosion inhibitor auxiliary agent is oleic acid amino ethyl imidazoline or oleic acid imidazoline, molybdate is sodium molybdate or a mixture of sodium molybdate and sodium tripolyphosphate, the cosolvent is n-butanol, and the solvent is water. The provided long-acting corrosion inhibitor can achieve a high corrosion inhibition rate at a high temperature, is green and environment-friendly, can well protect oil casing from corrosion during the processes of gas well acidification and flowback after acidification, can guarantee the normal production and sustainable development of gas field, is capable of generating prominent economic benefits and social benefits, and thus has a good promotion and application prospect.
Description
Technical field
The invention belongs to inhibiter field, be specifically related to the long-acting inhibiter of a kind of acidification of gas well and compound method thereof and using method.
Background technology
Acidifying utilizes acid solution to the dissolving of tamper in rock cementing matter or formation pore, crack and corrosion, recovers or improve gas-bearing formation perviousness, realizing the technical measures of oil/gas well stimulation.In the acidization of gas field, ubiquity comparatively serious etching problem, brings huge financial loss, and cause the problems such as environmental pollution to production.
There is long-lasting difference and the problem such as serious that runs off on stratum in the inhibiter of current use, especially when residual acid solution returns row, steel surface, by heavy corrosion, causes construction cost to increase.
Based on above-mentioned situation, be necessary to develop novel long-lasting acidification corrosion inhibitor, thus realize the new breakthrough of inhibiter in acidification of gas well process.
Summary of the invention
The object of the present invention is to provide the long-acting inhibiter of a kind of acidification of gas well and compound method thereof and using method, this inhibiter returns to be drained through in journey after acidification of gas well exploitation and acidifying has good tubing and casing corrosion prevention effect.
For achieving the above object, the technical solution used in the present invention is:
The long-acting inhibiter of a kind of acidification of gas well, by mass percentage, this inhibiter is formulated by following component:
Wherein, inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline or oily acid based imidazolines, and molybdate is the compound of Sodium orthomolybdate or Sodium orthomolybdate and tripoly phosphate sodium STPP, and solubility promoter is propyl carbinol, and solvent is water.
In described Sodium orthomolybdate and the compound of tripoly phosphate sodium STPP, the mass ratio of Sodium orthomolybdate and tripoly phosphate sodium STPP is (0.8 ~ 1.2): 1.
By mass percentage, this inhibiter is formulated by following component: inhibiter host 15%, inhibiter assistant agent 15%, molybdate 6%, solubility promoter 10%, solvent 54%, and wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate.
By mass percentage, this inhibiter is formulated by following component: inhibiter host 18%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 14%, solvent 50%, and wherein inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is Sodium orthomolybdate.
By mass percentage, this inhibiter is formulated by following component: inhibiter host 14%, inhibiter assistant agent 16%, molybdate 6%, solubility promoter 11%, solvent 53%, and wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate.
By mass percentage, this inhibiter is formulated by following component: inhibiter host 14%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 12%, solvent 56%, wherein inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP.
By mass percentage, this inhibiter is formulated by following component: inhibiter host 16%, inhibiter assistant agent 14%, molybdate 8%, solubility promoter 10%, solvent 52%, wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP.
The acidification of gas well compound method of long-acting inhibiter, concrete steps are as follows: first solvent and solubility promoter mixed and stir, then inhibiter host is added, stirring makes it be uniformly dispersed, add inhibiter assistant agent again, stir and make it be uniformly dispersed, finally add molybdate, stirring makes it be uniformly dispersed, and namely obtains the long-acting inhibiter of acidification of gas well.
The acidification of gas well using method of long-acting inhibiter, concrete steps are as follows: be (0.3 ~ 3) in mass ratio: 100 add the long-acting inhibiter of acidification of gas well in acidizing fluid, use after stirring, carry out acidification of gas well process, or carry out the pipe pickling in refinery, boiler or steel mill's industry.
Relative to prior art, beneficial effect of the present invention is:
The present invention is by molecular designing and chemical compounding principle, provide the long-acting inhibiter of a kind of acidification of gas well, this inhibiter is long-lasting good, have that consumption is few, applied range, with the feature such as acid solution compatibleness is good, be specially adapted to acidification of gas well and exploit and return the tubing and casing corrosion prevention be drained through in journey after acidifying.And corrosion inhibition rate under this inhibiter high temperature is high, green, environmental protection, at acidification of gas well and return and be drained through Cheng Zhongneng and well suppress strong acid to the corrosion of tubing and casing, thus can ensure normal production and the Sustainable development in gas field.The long-acting inhibiter of well acidizing provided by the invention achieves inhibiter new breakthrough in acidification of gas well process, not only has significant economic benefit, and has important social benefit, have good popularizing application prospect.In addition, the long-acting inhibiter of well acidizing provided by the invention not only can use for oil pipe protection in acidification of gas well process, also can promote 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, adds inhibiter host, inhibiter assistant agent and molybdate successively, be uniformly dispersed with solubility promoter after being mixed by solvent.Therefore this acidification of gas well is very convenient with the production of long-acting inhibiter, and required plant and instrument is few, and production cost is low, is extremely suitable for industrialization scale operation.
Embodiment
Below the present invention is described in further details.
In order to check the corrosion mitigating effect of this inhibiter, present invention employs prepared by 340atm nickel-base alloy quiet-dynamic high temperature autoclave, with reference to SY5405-1996 acidifying inhibiter method for testing performance and evaluation index, the acidification of gas well of the present invention's preparation is evaluated with the corrosion mitigating effect of long-acting inhibiter.
Embodiment 1
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 15%, inhibiter assistant agent 15%, molybdate 6%, solubility promoter 10%, solvent 54%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 270g water and 50g propyl carbinol, stir; 2. slowly add 75g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 75g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. 30g Sodium orthomolybdate is slowly added again; 5. at the uniform velocity stirring 0.5h with 500r/min makes it be uniformly dispersed, and obtains the long-acting inhibiter of described acidification of gas well.
The long-acting inhibiter of acidification of gas well embodiment 1 prepared adds 90 DEG C, in the acidizing fluid of 20%HCl (weight), stir, be mixed with the inhibiter souring soln of different concns, then test, for the evaluation result of 80S steel, test period is 4 hours, and its result is as shown in table 1.
The corrosion inhibition rate of inhibiter under table 1 different concns
| Density of corrosion inhibitor, % (weight) | Erosion rate, g/ (m 2·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 |
Can be found out by table 1, and do not add compared with inhibiter, the acidification of gas well adding the present invention's preparation can reach more than 99% with the corrosion inhibition rate after long-acting inhibiter, illustrates that the long-acting inhibiter of acidification of gas well provided by the invention has extraordinary corrosion mitigating effect.
Embodiment 2
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 18%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 14%, solvent 50%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is Sodium orthomolybdate, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 250g water and 70g propyl carbinol, stir; 2. slowly add 90g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 60g oleic acid base amine ethyl imidazol(e) quinoline in the mixture, make it be uniformly dispersed; 4. 30g Sodium orthomolybdate is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Under table 2 gives differing temps, the acidification of gas well that embodiment 2 is prepared is with long-acting inhibiter in 20%HCl (weight) solution, and for the evaluation result of 80S steel, the test period is 4 hours.
Table 2 inhibiter 0.3% (weight) corrosion inhibition rate at different temperatures
Can be found out by table 2, the acidification of gas well of the present invention's preparation shows extraordinary corrosion mitigating effect with long-acting inhibiter, 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 by following component with long-acting inhibiter: inhibiter host 14%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 12%, solvent 56%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 280g water and 60g propyl carbinol, stir; 2. slowly add 70g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 60g oleic acid base amine ethyl imidazol(e) quinoline in the mixture, make it be uniformly dispersed; 4. the compound of the mass ratio of the 1:1 of 30g Sodium orthomolybdate and tripoly phosphate sodium STPP is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
The long-acting inhibiter of acidification of gas well embodiment 3 prepared adds 90 DEG C, in the acidizing fluid of 20%HCl (weight), stir, be mixed with the inhibiter souring soln that concentration is 1% (weight), then test, for the evaluation result of unlike material, test period is 4 hours, and its result is as shown in table 3.
Table 3 inhibiter is to the corrosion inhibition rate of unlike material
| Material | Blank corrosion rate, g/ (m 2·h) | Erosion rate, g/ (m 2·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 |
Can find out that the long-acting inhibiter of acidification of gas well that the present invention prepares is to P110,80S and S135 evenly good corrosion mitigating effect by table 3.
Embodiment 4
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 16%, inhibiter assistant agent 14%, molybdate 8%, solubility promoter 10%, solvent 52%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 260g water and 50g propyl carbinol, stir; 2. slowly add 80g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 70g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. the compound of the mass ratio of the 1:1 of 40g Sodium orthomolybdate and tripoly phosphate sodium STPP is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Under table 4 gives differing temps, the acidification of gas well that embodiment 4 is prepared is with long-acting inhibiter in 20%HCl (weight) solution, and for the evaluation result of N80 steel, the test period is 4 hours.
Table 4 inhibiter 0.3% (weight) inhibition efficiency at different temperatures
Can be found out by table 4, the acidification of gas well of the present invention's preparation is showing extraordinary corrosion mitigating effect with long-acting inhibiter, and the slow release effect especially under high temperature is better than the first class index in table 7.
Embodiment 5
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 14%, inhibiter assistant agent 16%, molybdate 6%, solubility promoter 11%, solvent 53%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 265g water and 55g propyl carbinol, stir; 2. slowly add 70g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 80g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. 30g Sodium orthomolybdate is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Table 5 give different concns inhibiter 90 DEG C, in 20%HCl (weight) solution, for the evaluation result of 80S steel, the test period is 8 hours.
The corrosion inhibition rate of table 5 different concns inhibiter
| Density of corrosion inhibitor, % (weight) | Erosion rate, g/ (m 2·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 contrasted, can find out, the corrosion inhibition rate that the corrosion inhibition rate of 8 hours compares 4 hours only has very small reduction, and the long-lasting very good of the long-acting inhibiter of acidification of gas well that the present invention prepares is described.
Embodiment 6
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 10%, inhibiter assistant agent 10%, molybdate 4%, solubility promoter 5%, solvent 71%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 355g water and 25g propyl carbinol, stir; 2. slowly add 50g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 50g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. 20g Sodium orthomolybdate is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Embodiment 7
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 20%, inhibiter assistant agent 20%, molybdate 10%, solubility promoter 15%, solvent 35%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is mass ratio is the Sodium orthomolybdate of 1.2:1 and the compound of tripoly phosphate sodium STPP, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 175g water and 75g propyl carbinol, stir; 2. slowly add 100g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 100g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. the compound of the mass ratio of the 1.2:1 of 50g Sodium orthomolybdate and tripoly phosphate sodium STPP is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Embodiment 8
By mass percentage, acidification of gas well is formulated by following component with long-acting inhibiter: inhibiter host 12%, inhibiter assistant agent 18%, molybdate 5%, solubility promoter 7%, solvent 58%, wherein inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oily acid based imidazolines, and molybdate is mass ratio is the Sodium orthomolybdate of 0.8:1 and the compound of tripoly phosphate sodium STPP, solubility promoter is propyl carbinol, and solvent is water.
The above-mentioned acidification of gas well compound method of long-acting inhibiter, comprises the following steps:
1. in 1L beaker, add 290g water and 35g propyl carbinol, stir; 2. slowly add 60g Trimethyllaurylammonium bromide, 300r/min at the uniform velocity stirs 5min, makes it be uniformly dispersed, obtains mixture; 3. slowly add 90g oil acid based imidazolines in the mixture, make it be uniformly dispersed; 4. the compound of the mass ratio of the 0.8:1 of 25g Sodium orthomolybdate and tripoly phosphate sodium STPP is slowly added again; 5. at the uniform velocity stir 0.5h with 500r/min make it be uniformly dispersed and obtain the long-acting inhibiter of described acidification of gas well.
Annex: the content of table 6 and table 7 is the reference values in petroleum industry standard SY/T5405-1996.
Table 6 normal pressure static etch rate condition determination and inhibiter evaluation index
Table 7 High Temperature High Pressure Dynamic Corrosion rate determination condition and inhibiter evaluation index
Claims (9)
1. the long-acting inhibiter of acidification of gas well, is characterized in that: by mass percentage, and this inhibiter is formulated by following component:
Wherein, inhibiter host is Trimethyllaurylammonium bromide, and inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline or oily acid based imidazolines, and molybdate is the compound of Sodium orthomolybdate or Sodium orthomolybdate and tripoly phosphate sodium STPP, and solubility promoter is propyl carbinol, and solvent is water.
2. the long-acting inhibiter of acidification of gas well according to claim 1, is characterized in that: in described Sodium orthomolybdate and the compound of tripoly phosphate sodium STPP, the mass ratio of Sodium orthomolybdate and tripoly phosphate sodium STPP is (0.8 ~ 1.2): 1.
3. the long-acting inhibiter of acidification of gas well according to claim 1, it is characterized in that: by mass percentage, this inhibiter is formulated by following component: inhibiter host 15%, inhibiter assistant agent 15%, molybdate 6%, solubility promoter 10%, solvent 54%, wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate.
4. the long-acting inhibiter of acidification of gas well according to claim 1, it is characterized in that: by mass percentage, this inhibiter is formulated by following component: inhibiter host 18%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 14%, solvent 50%, wherein inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is Sodium orthomolybdate.
5. the long-acting inhibiter of acidification of gas well according to claim 1, it is characterized in that: by mass percentage, this inhibiter is formulated by following component: inhibiter host 14%, inhibiter assistant agent 16%, molybdate 6%, solubility promoter 11%, solvent 53%, wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is Sodium orthomolybdate.
6. the long-acting inhibiter of acidification of gas well according to claim 2, it is characterized in that: by mass percentage, this inhibiter is formulated by following component: inhibiter host 14%, inhibiter assistant agent 12%, molybdate 6%, solubility promoter 12%, solvent 56%, wherein inhibiter assistant agent is oleic acid base amine ethyl imidazol(e) quinoline, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP.
7. the long-acting inhibiter of acidification of gas well according to claim 2, it is characterized in that: by mass percentage, this inhibiter is formulated by following component: inhibiter host 16%, inhibiter assistant agent 14%, molybdate 8%, solubility promoter 10%, solvent 52%, wherein inhibiter assistant agent is oily acid based imidazolines, and molybdate is mass ratio is the Sodium orthomolybdate of 1:1 and the compound of tripoly phosphate sodium STPP.
8. the compound method of long-acting inhibiter of the acidification of gas well in claim 1-7 described in any one, it is characterized in that, concrete steps are as follows: first solvent and solubility promoter mixed and stir, then add inhibiter host, stir and make it be uniformly dispersed, then add inhibiter assistant agent, stirring makes it be uniformly dispersed, finally add molybdate, stir and make it be uniformly dispersed, namely obtain the long-acting inhibiter of acidification of gas well.
9. the using method of long-acting inhibiter of the acidification of gas well in claim 1-7 described in any one, it is characterized in that, concrete steps are as follows: be (0.3 ~ 3) in mass ratio: 100 add the long-acting inhibiter of acidification of gas well in acidizing fluid, use after stirring, carry out acidification of gas well process, or carry out the pipe pickling in refinery, boiler or steel mill's industry.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106085399A (en) * | 2016-06-27 | 2016-11-09 | 中国石油集团渤海钻探工程有限公司 | Acidifying compounding Imidazoline corrosion inhibitor and preparation method thereof |
| WO2018119973A1 (en) * | 2016-12-30 | 2018-07-05 | 刘清华 | Hydrochloric acid pickling inhibitor and preparation method therefor |
| CN111058043A (en) * | 2018-10-17 | 2020-04-24 | 中国石油化工股份有限公司 | Organic composite corrosion inhibitor and method for inhibiting carbon steel corrosion in Fischer-Tropsch synthesis reaction water by using same |
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| WO2018119973A1 (en) * | 2016-12-30 | 2018-07-05 | 刘清华 | Hydrochloric acid pickling inhibitor and preparation method therefor |
| CN111058043A (en) * | 2018-10-17 | 2020-04-24 | 中国石油化工股份有限公司 | Organic composite corrosion inhibitor and method for inhibiting carbon steel corrosion in Fischer-Tropsch synthesis reaction water by using same |
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