CN115703742A - Corrosion-inhibiting bactericidal compound and agent suitable for oil and gas fields and preparation method - Google Patents
Corrosion-inhibiting bactericidal compound and agent suitable for oil and gas fields and preparation method Download PDFInfo
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- 230000007797 corrosion Effects 0.000 title claims abstract description 86
- 238000005260 corrosion Methods 0.000 title claims abstract description 86
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 40
- 150000001875 compounds Chemical class 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000002401 inhibitory effect Effects 0.000 title claims description 22
- 230000005764 inhibitory process Effects 0.000 claims abstract description 43
- 230000001954 sterilising effect Effects 0.000 claims abstract description 35
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 30
- 239000003899 bactericide agent Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 150000001350 alkyl halides Chemical class 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003814 drug Substances 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 239000000376 reactant Substances 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 30
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 27
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000035484 reaction time Effects 0.000 claims description 6
- 239000003206 sterilizing agent Substances 0.000 claims description 4
- 150000001347 alkyl bromides Chemical class 0.000 claims description 3
- 150000001348 alkyl chlorides Chemical class 0.000 claims description 3
- 150000001351 alkyl iodides Chemical class 0.000 claims description 3
- AGEZXYOZHKGVCM-UHFFFAOYSA-N benzyl bromide Chemical compound BrCC1=CC=CC=C1 AGEZXYOZHKGVCM-UHFFFAOYSA-N 0.000 claims description 3
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 claims description 3
- 229940073608 benzyl chloride Drugs 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000003125 aqueous solvent Substances 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 3
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- 239000003112 inhibitor Substances 0.000 description 8
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- 239000012046 mixed solvent Substances 0.000 description 6
- LLEASVZEQBICSN-UHFFFAOYSA-N 2-undecyl-1h-imidazole Chemical compound CCCCCCCCCCCC1=NC=CN1 LLEASVZEQBICSN-UHFFFAOYSA-N 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 4
- MPPPKRYCTPRNTB-UHFFFAOYSA-N 1-bromobutane Chemical compound CCCCBr MPPPKRYCTPRNTB-UHFFFAOYSA-N 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000012854 evaluation process Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Abstract
The invention discloses a corrosion inhibition bactericidal compound, a medicament and a preparation method thereof, which are suitable for oil and gas fields, and the compound has the following structural formula:
Description
Technical Field
The invention relates to the technical field of microorganism and carbon dioxide corrosion protection, in particular to a corrosion inhibition bactericidal compound and a medicament suitable for oil and gas fields and a preparation method thereof.
Background
At home and abroad, H faces to the development and production process of many oil and gas fields 2 S/CO 2 Corrosion and microbial corrosion. Taking shale gas field as an example, gathering and transportation pipelines are simultaneously subjected to CO in the early production stage 2 And microbial corrosion, have posed serious challenges to safe production.
At present, bactericide and corrosion inhibitor are added to ensure the safety of pipelines, wherein the bactericide is used for killing and controlling microorganisms, and the corrosion inhibitor mainly plays a role in inhibiting electrochemical corrosion. Chinese patent CN106719681A discloses an oil field sterilization corrosion inhibitor and a preparation method thereof, chinese patent CN110273157A discloses a corrosion inhibitor with sterilization and scale inhibition functions and a preparation method thereof, chinese patent CN104628097A is a composition for a sterilization corrosion inhibitor, chinese patent CN109971447A discloses a sterilization type corrosion inhibitor for an oil well gathering and transportation and sewage treatment system and a preparation method thereof. All the technologies can play a certain role in sterilization and corrosion inhibition.
However, the prior art has at least the following problems:
1) Most of the existing bactericidal corrosion inhibitor products are compositions, namely the final product is formed by mixing a plurality of components, and usually comprises an auxiliary agent, a synergist and the like. Even part of products are simply mixed and prepared by medicaments with the functions of corrosion inhibition and sterilization respectively. Such products are not conducive to scale production and application.
2) The prior bactericidal corrosion inhibitor has the problems of self stability of the medicament, incompatibility of the medicament and water produced in a production field and the like in the application process.
Disclosure of Invention
Based on the technical background, the invention provides a corrosion inhibition bactericidal compound, a medicament and a preparation method thereof, which solve the problems, the provided medicament has corrosion inhibition and bactericidal functions, and can still maintain high-efficiency bactericidal power after long-term use.
The invention is realized by the following technical scheme:
a corrosion-inhibiting bactericidal compound suitable for oil and gas fields, the compound has the following structural formula:
a preparation method of a corrosion-inhibiting bactericidal compound suitable for oil and gas fields comprises the following steps:
step 1: adding 2- (octa-dodecyl) imidazole and acrylonitrile into a solvent, and heating for reaction;
step 2: adding alkyl halide into the reactant in the step 1, and heating for reaction to obtain a compound with a structural formula shown as the following:
the reaction sequence of step 1 is as follows:
the reaction process of step 2 is as follows:
more preferably, in the step 1, the molar ratio of the 2- (octa-dodecyl) alkylimidazole to the acrylonitrile is 1 to 1.5; too high or too low of the proportion adversely affects the final product performance such as sterilization and corrosion inhibition.
More preferably, in the step 2, the molar ratio of the reaction product of the step 1 to the alkyl halide is 1; too high or too low of the proportion has adverse effects on the final product performance such as sterilization and corrosion inhibition.
Further preferably, the solvent comprises one or more of ethylene glycol, glycerol and ethanol.
Further preferably, the alkyl halide comprises one or more of C1-C4 linear or branched alkyl halide, benzyl chloride and benzyl bromide; the C1-C4 linear chain or branched chain alkyl halide comprises C1-C4 linear chain or branched chain alkyl chloride, alkyl bromide and alkyl iodide.
Further preferably, in the step 1, the reaction temperature is 40-80 ℃, and the reaction time is 2-12 h; in the step 2, the reaction temperature is 40-100 ℃, and the reaction time is 2-24 h.
A corrosion-inhibiting and sterilizing agent suitable for oil and gas fields comprises a solute and a solvent; the solute comprises a compound, the solvent adopts water, and the structural formula of the compound is as follows:
the preparation method of the corrosion inhibition and sterilization agent suitable for the oil and gas field is based on the preparation method of the corrosion inhibition and sterilization compound suitable for the oil and gas field, and comprises the following steps:
step 1: adding 2- (octa-dodecyl) imidazole and acrylonitrile into a solvent, and heating for reaction;
and 2, step: adding alkyl halide into the reactant in the step 1, and heating for reaction;
and step 3: and (3) adding water into the reactant in the step (2) to prepare the corrosion-inhibition bactericidal agent.
Preferably, in the step 1, the molar ratio of the 2- (octa-dodecyl) alkylimidazole to the acrylonitrile is 1 to 1.5. Preferably, in the step 2, the molar ratio of XX to alkyl halide is 1. Preferably, the solvent comprises one or more of ethylene glycol, glycerol and ethanol. Preferably, the alkyl halide comprises one or more of C1-C4 linear or branched alkyl halide, benzyl chloride and benzyl bromide; the C1-C4 linear chain or branched chain alkyl halide comprises C1-C4 linear chain or branched chain alkyl chloride, alkyl bromide and alkyl iodide. Preferably, in the step 1, the reaction temperature is 40-80 ℃, and the reaction time is 2-12 h; in the step 2, the reaction temperature is 40-100 ℃, and the reaction time is 2-24 h.
The method for preparing the corrosion inhibition and sterilization agent suitable for the oil and gas field is based on the preparation method of the corrosion inhibition and sterilization compound suitable for the oil and gas field, namely in the preparation method of the corrosion inhibition and sterilization compound suitable for the oil and gas field, the step 3 is added, and after the reaction of the prepared compound is finished, water is directly added to prepare the corrosion inhibition and sterilization agent.
Further preferably, the water solvent is added until the mass percentage concentration of the corrosion inhibition and sterilization agent is 20-60%.
The invention has the following advantages and beneficial effects:
the invention provides a compound with a novel structure, which has the functions of corrosion inhibition and sterilization; compared with a single aldehyde bactericide, the compound can effectively reduce the tolerance of each strain, and can still keep high-efficiency bactericidal power after long-term use.
The corrosion inhibition bactericide provided by the invention can be quickly adsorbed on the metal surface and the bacterial surface, has good corrosion inhibition capability, sterilization capability and bacteriostasis capability, can control the corrosion rate mainly based on carbon dioxide corrosion to be below 0.076mm/a, can effectively kill Sulfate Reducing Bacteria (SRB), and has the sterilization rate of more than 99%.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1
The embodiment provides a corrosion inhibition bactericidal compound suitable for oil and gas fields, which is prepared by the following method:
adding 2-undecylimidazole and acrylonitrile into a mixed solvent of 100g of ethanol, glycerol and glycol according to a molar ratio of 1; then adding 1 mol of bromobutane, heating to 100 ℃ and reacting for 8 hours, wherein the structural formula of the reaction product is shown as follows:
example 2
The embodiment provides a corrosion inhibition bactericidal agent which is prepared by the following method:
adding 2-undecylimidazole and acrylonitrile into 100g of a mixed solvent of ethanol, glycerol and glycol according to a molar ratio of 1; then adding 1 mol of bromobutane, heating to 100 ℃ and reacting for 8h; and finally, 314g of water is added to obtain the final corrosion inhibition bactericide No. 1.
Example 3
The embodiment provides a corrosion inhibition and sterilization medicament which is prepared by the following method:
adding 2-undecylimidazole and acrylonitrile into a mixed solvent of 100g of ethanol, glycerol and glycol according to a molar ratio of 1.2, heating to 60 ℃, and reacting for 6 hours; then adding 1 mol of bromobutane, heating to 100 ℃ and reacting for 8h; and finally, 314g of water is added to obtain the final corrosion inhibition bactericide No. 2.
Example 4
The embodiment provides a corrosion inhibition and sterilization medicament which is prepared by the following method:
adding 2-undecylimidazole and acrylonitrile into 100g of a mixed solvent of ethanol, glycerol and glycol according to a molar ratio of 1; then adding 1 mol of methyl iodide, heating to 100 ℃ and reacting for 8h; and finally, 314g of water is added to obtain the final corrosion inhibition bactericide No. 3.
Example 5
The embodiment provides a corrosion inhibition and sterilization medicament which is prepared by the following method:
adding 2-octaalkylimidazole and acrylonitrile into a mixed solvent of 100g of ethanol, glycerol and glycol according to a molar ratio of 1; then adding 1 mol of methyl iodide, heating to 100 ℃ and reacting for 8h; and finally, 314g of water is added to obtain the final corrosion inhibition bactericide No. 4.
Example 6
The embodiment provides a corrosion inhibition and sterilization medicament which is prepared by the following method:
adding 2-undecylimidazole and acrylonitrile into a mixed solvent of 100g of ethanol, glycerol and glycol according to a molar ratio of 1; then adding 1 mol of methyl iodide, heating to 100 ℃ and reacting for 8h; finally, 314g of ethanol is added to obtain the final corrosion inhibition bactericide No. 5.
1. Evaluation and analysis of the Corrosion-inhibiting and Bactericidal Agents prepared in examples 2-6
1. Sterilization test
(1) Test method
The corrosion-inhibiting bactericidal agents provided in examples 2-6 were evaluated for bactericidal performance. The specific evaluation process comprises the following steps: the corrosion inhibition bactericide provided by the embodiment 2-6 is respectively used for carrying out sterilization tests on the provided SRB bacteria-containing water sample, the concentration of the corrosion inhibition bactericide is 100mg/L, after the SRB bacteria-containing water sample is added with the bactericide and is cultured in an anaerobic environment at 25 ℃ for 24h, the bacterial content is determined by referring to a SY/T0532 oilfield injection water bacterial analysis method-an obliteration dilution method, and the sterilization rate is calculated according to the following formula:
in the formula:
x-sterilization rate,%;
a 2 -number of bacteria after sterilisation, number/mL;
a 1 number of blank bacteria, number/mL.
(2) Test results
TABLE 1 results of tests on bactericidal properties of the corrosion-inhibiting bactericides prepared in examples 2-6
| Corrosion inhibition bactericide | Test agent concentration, ppm | SRB bacterial count, number | A sterilizing rate% |
| Blank space | - | 25.0×10 3 | - |
| Example 2 | 100 | 0 | 99.9 |
| Example 3 | 100 | 0 | 99.9 |
| Example 4 | 100 | 0 | 99.9 |
| Example 5 | 100 | 0 | 99.9 |
| Example 6 | 100 | 0 | 99.9 |
As is clear from Table 1, the bactericidal ratio of the bactericidal agents provided in examples 2 to 6 was 99.9% or more. Therefore, the corrosion inhibition bactericide provided by the embodiment of the invention has good bactericidal performance.
2. Corrosion test
(1) Test method
The corrosion inhibition and sterilization agents provided in examples 2 to 6 were evaluated for corrosion. The specific evaluation process comprises the following steps: the corrosion-inhibiting bactericidal agents provided in examples 2-6 were separately added to the solution containing 500ppm of CO 2 The corrosion test is carried out on a 5% sodium chloride water sample, the using concentration of the corrosion inhibition bactericide is 100mg/L, the corrosion material is 360N, the corrosion rate is calculated after the corrosion inhibition bactericide is placed in an anaerobic environment for 72 hours at 40 ℃ and normal pressure, and the calculation formula of the corrosion rate is shown as the following formula:
in the formula:
V c -uniform corrosion rate in millimeters per year (mm/a);
m is the weight loss of the hanging piece, and the unit is gram (g);
s-exposed area of the hanging strip, in square centimeters (cm) 2 )；
t is experimental time in hours (h);
rho-relative hanging piece density in grams per cubic centimeter (g/cm) 3 )。
TABLE 2 results of tests on corrosion inhibition performance of corrosion-inhibiting biocides prepared in examples 2-6
| Test agent concentration | Test agent concentration, ppm | Corrosion rate, mm/a |
| Blank space | - | 0.3656 |
| Example 2 | 100 | 0.0554 |
| Example 3 | 100 | 0.0567 |
| Example 4 | 100 | 0.0673 |
| Example 5 | 100 | 0.0660 |
| Example 6 | 100 | 0.0488 |
As can be seen from Table 2, the corrosion rates of the corrosion-inhibiting bactericidal agents provided in examples 2 to 6 were 0.076mm/a or less. Therefore, the corrosion inhibition bactericide provided by the embodiment of the invention has good corrosion inhibition performance.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A corrosion-inhibiting bactericidal compound suitable for oil and gas fields, characterized in that the compound has the following structural formula:
2. a preparation method of a corrosion inhibition bactericidal compound suitable for oil and gas fields is characterized by comprising the following steps:
step 1: adding 2- (octa-dodecyl) imidazole and acrylonitrile into a solvent, and heating for reaction;
step 2: adding alkyl halide into the reactant in the step 1, and heating for reaction to obtain a compound with a structural formula shown as the following:
3. the method for preparing the corrosion-inhibiting and sterilizing compound suitable for oil and gas fields according to claim 1, wherein in the step 1, the molar ratio of the 2- (octa-dodecyl) alkylimidazole to the acrylonitrile is 1.
4. The method for preparing the corrosion-inhibiting and sterilizing compound suitable for oil and gas fields according to claim 1, wherein in the step 2, the molar ratio of the reaction product of the step 1 to the alkyl halide is 1.
5. The method for preparing the corrosion-inhibiting and sterilizing compound suitable for oil and gas fields as claimed in claim 1, wherein the solvent comprises one or more of ethylene glycol, glycerol and ethanol.
6. The method for preparing the corrosion-inhibiting bactericidal compound suitable for oil and gas fields according to claim 1, wherein the alkyl halide comprises one or more of C1-C4 linear or branched alkyl halide, benzyl chloride and benzyl bromide; the C1-C4 linear chain or branched chain alkyl halide comprises C1-C4 linear chain or branched chain alkyl chloride, alkyl bromide and alkyl iodide.
7. The method for preparing the corrosion-inhibiting bactericidal compound suitable for oil and gas fields as claimed in claim 1, wherein in the step 1, the reaction temperature is 40-80 ℃ and the reaction time is 2-12 h; in the step 2, the reaction temperature is 40-100 ℃, and the reaction time is 2-24 h.
8. A corrosion inhibition and sterilization medicament suitable for oil and gas fields is characterized by comprising a solute and a solvent; the solute comprises a compound, the solvent adopts water, and the structural formula of the compound is as follows:
9. a method for preparing a corrosion-inhibiting and sterilizing agent suitable for oil and gas fields, which is based on the method for preparing a corrosion-inhibiting and sterilizing compound suitable for oil and gas fields according to any one of claims 2 to 7, and comprises the following steps:
step 1: adding 2- (octa-dodecyl) imidazole and acrylonitrile into a solvent, and heating for reaction;
step 2: adding alkyl halide into the reactant in the step 1, and heating for reaction;
and step 3: and (3) adding water into the reactant in the step (2) to prepare the corrosion-inhibition bactericidal agent.
10. The preparation method of the corrosion-inhibiting and sterilizing agent suitable for the oil and gas field as claimed in claim 1, wherein the aqueous solvent is added until the mass percentage concentration of the corrosion-inhibiting and sterilizing agent is 20-60%.
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2021
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