CN115584253B - Multifunctional wax-proofing agent and preparation method thereof - Google Patents
Multifunctional wax-proofing agent and preparation method thereof Download PDFInfo
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- CN115584253B CN115584253B CN202211146779.9A CN202211146779A CN115584253B CN 115584253 B CN115584253 B CN 115584253B CN 202211146779 A CN202211146779 A CN 202211146779A CN 115584253 B CN115584253 B CN 115584253B
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention belongs to the technical field of petroleum and natural gas exploitation, and particularly relates to a multifunctional wax inhibitor and a preparation method thereof. The raw materials of the wax inhibitor comprise maleic acid, alkyl alcohol, vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrene sulfonate, ethanol and azo initiator. The preparation method comprises the steps of firstly mixing maleic acid and alkyl alcohol, and reacting to obtain a mixed solution; then adding vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrene sulfonate, ethanol and azo initiator into the mixed solution, and reacting to obtain the catalyst. The preparation process is simple and convenient, and can be prepared by only 2 steps; the corrosion inhibition capability, the sterilization capability and the wax control capability are good.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas exploitation, and particularly relates to a multifunctional wax inhibitor and a preparation method thereof.
Background
In CO 2 CO dissolved in liquid during production of flooding well 2 Will corrode the steel pipe and the SRB entering the produced fluid will accelerate the bureauPart corrosion occurs, resulting in corrosion perforation of wellbore tubing; meanwhile, because the crude oil contains wax, the wax can be gradually separated out along with the change of the temperature, the pressure and the like of a shaft, the shaft is blocked due to condensation on the wall of the shaft, and great potential safety hazards exist. To solve these problems, it is generally necessary to separately inject a corrosion inhibitor, a bactericide and a wax inhibitor into the wellbore, and three sets of filling equipment are established. At present, a great deal of research on the three oilfield chemical agents is carried out, and a great deal of research results are obtained; in recent years, a multifunctional medicament with corrosion inhibition and sterilization effects and a multifunctional medicament with corrosion inhibition and wax control effects have been reported, but at present, no multifunctional medicament with corrosion inhibition, sterilization and wax control effects exists.
Chinese patent CN 114106270A discloses an oil pipe wax-preventing and descaling agent, a preparation method and application thereof, wherein graphene oxide powder is uniformly dispersed in a water solvent under the action of ultrasound to obtain a graphene oxide suspension, a binary polymer monomer and a silane coupling agent are uniformly dispersed in the graphene oxide suspension through stirring treatment, and an initiator is dripped to carry out suspension polymerization, so that the binary polymer monomer is polymerized on the surface of graphene oxide to obtain a binary polymer graphene oxide compound. And adding the scale remover to perform secondary stirring treatment and uniformly mixing to obtain the oil pipe wax-preventing scale remover. The oil pipe wax-preventing and descaling agent has good wax-preventing and descaling effects, and the preparation method is simple and easy to operate. However, the method does not consider the conditions of corrosion in the oil pipe and colony generation, SRB can accelerate the occurrence of local corrosion in the process of conveying the oilfield produced liquid in the pipeline, and pipeline corrosion can cause leakage of the pipeline produced liquid;
chinese patent CN110257035a discloses a method for preparing a compound wax inhibitor for oil well, which comprises mixing stearyl methacrylate, maleic anhydride, styrene, initiator, and solvent, heating and stirring to react to obtain a mixed solution; mixing glass fiber, yeast powder, starch and water for fermentation, then adding pig blood with the mass of 0.2-0.3 times of that of the glass fiber and hirudin with the mass of 0.02-0.03 times of that of the glass fiber, stirring, mixing, drying, crushing and sieving to obtain modified glass fiber; and finally, according to parts by weight, mixing 20-30 parts of mixed solution, 8-10 parts of modified glass fiber, 3-5 parts of surfactant, 20-30 parts of water, 10-20 parts of modified additive and 10-20 parts of pretreated nano copper powder, and stirring and mixing to obtain the oil well composite wax-proofing agent. The wax-proof rate of the invention can reach 51.8%;
chinese patent CN110184040a discloses a hyperbranched polymer wax inhibitor and preparation method thereof, the technical scheme is: dissolving stearyl methacrylate, vinyl acetate and terephthalyl in dimethylbenzene, adding an initiator benzoyl peroxide in a nitrogen environment, and reacting at 70 ℃ for 6 hours to obtain the hyperbranched polymer wax inhibitor. The two patents also do not consider the corrosion in the pipeline and the generation of bacterial colonies, and the two patents have the problems of complex production process, higher cost, limited popularization and application value and the like.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the multifunctional wax inhibitor and the preparation method thereof, the preparation process is simple and convenient, and the preparation can be carried out in 2 steps; the corrosion inhibition capability, the sterilization capability and the wax control capability are good.
In order to achieve the purpose of the invention, the technical scheme adopted is as follows:
the raw materials of the multifunctional wax inhibitor comprise maleic acid, alkyl alcohol, vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrenesulfonate compound, ethanol and azo initiator.
Preferably, the alkyl alcohol is selected from linear alkyl alcohols.
Preferably, the alkyl alcohol is n-cetyl alcohol.
Preferably, the vinyl pyridine is any one or more of 2-vinyl pyridine, 3-vinyl pyridine and 4-vinyl pyridine.
Preferably, the sodium styrene sulfonate compound is any one or a mixture of more of sodium p-styrene sulfonate, sodium poly (4-styrene sulfonate) and sodium beta-styrene sulfonate.
Preferably, the azo initiator is any one or a mixture of a plurality of azodiisoheptonitrile, azodiisobutyronitrile, azoi Ding Qingji formamide and azodiisobutylamidine hydrochloride.
Preferably, the molar ratio of the maleic acid to the alkyl alcohol is 1:0.9-1:2.2.
Preferably, the mol ratio of the vinyl pyridine to the 1-chloromethyl naphthalene is 1:0.8-1:1.5.
Preferably, the molar ratio of the butyl acrylate to the sodium styrenesulfonate compound is 1:1.
The invention provides a preparation method of the wax inhibitor, which comprises the following steps:
(1) Mixing maleic acid and alkyl alcohol, and reacting to obtain a mixed solution;
(2) Adding vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrene sulfonate, ethanol and azo initiator into the mixed solution, and reacting to obtain the catalyst.
Preferably, the temperature of the reaction in the step (1) is 120-150 ℃, and the time of the reaction is 1-3 h.
Preferably, the temperature of the mixed solution is reduced to 60-80 ℃ before the mixed solution is added in the step (2).
Preferably, the reaction in step (2) is carried out with stirring under nitrogen.
Preferably, the reaction time in step (2) is from 6 to 8 hours.
It is also an object of the present invention to provide the use of the above wax control agent in the preparation of a medicament having a corrosion inhibiting, sterilizing or wax control effect.
Compared with the prior art, the invention has the beneficial effects that:
(1) The preparation process of the multifunctional wax-proofing agent is simple and convenient, and the multifunctional wax-proofing agent can be prepared by only 2 steps; the corrosion inhibition capability, the sterilization capability and the wax control capability are good.
(2) The multifunctional agent prepared by the wax inhibitor can effectively inhibit corrosion, and the effect is better than that of the corrosion inhibitor-like N-benzyl pyridinium chloride; can inhibit corrosion mainly including carbon dioxide corrosion. When the material is N80, the corrosion inhibition rate of 1000ppm of N-benzyl pyridine chloride is 60.9%, and the corrosion inhibition rate of the product is 75.1%.
(3) The three-effect medicament prepared by the invention can effectively sterilize, and the effect is better than that of N-benzyl pyridinium chloride similar to a bactericide; the product is used for respectively carrying out sterilization tests on the bacterial water sample containing the SRB, the concentration of the chemical agent is 100mg/L, the bacterial water sample containing the SRB is cultured for 24 hours at 30 ℃ after the chemical agent is added, and the bacterial content is measured by adopting an MPN method, so that the sterilization rate is calculated. Meanwhile, the pyridine quaternary ammonium salt corrosion inhibitor N-benzyl pyridine salt with a sterilization function is used for comparison. The experimental result shows that the sterilization rate of the N-benzyl pyridine chloride salt is 88.4%, and the sterilization rate of the product is about 99%.
(4) The three-effect medicament prepared by the invention can effectively prevent wax, and the wax control rate can reach 52.1 percent.
Detailed Description
The invention is further described in connection with the following detailed description.
Example 1
The multifunctional wax inhibitor of the embodiment is prepared by the following steps:
the first step: 116g of maleic acid and 226g of n-hexadecanol were taken, mixed and heated to 140 ℃ and reacted with stirring for 2 hours to obtain a yellow viscous liquid.
And a second step of: heating was stopped and cooled to 60 ℃. 105g of 4-vinyl pyridine, 176.5g of 1-chloromethyl naphthalene, 128g of butyl acrylate, 206g of sodium p-styrene sulfonate, 8.2g of azodiisobutyronitrile and 1150g of ethanol are added into the reaction solution in the first step, then the reaction is carried out for 6 hours at constant temperature under the protection of nitrogen, and the heating is stopped, thus obtaining the final three-function pipeline chemical agent for corrosion inhibition, sterilization and wax control of the oilfield produced fluid.
Example 2
The multifunctional wax inhibitor of the embodiment is prepared by the following steps:
the first step: 116g of maleic acid and 226g of n-hexadecanol were taken, and after mixing, the mixture was heated to 120℃and stirred for 3 hours to give a yellow viscous liquid.
And a second step of: heating was stopped and cooled to 80 ℃. 105g of 3-vinyl pyridine, 176.5g of 1-chloromethyl naphthalene, 128g of butyl acrylate, 206g of poly (4-sodium styrene sulfonate), 8.2g of azodiisobutyronitrile and 1150g of ethanol are added into the reaction solution in the first step, then the reaction is carried out for 6 hours at constant temperature under the protection of nitrogen, and the heating is stopped, thus obtaining the final three-function pipeline chemical agent for corrosion inhibition, sterilization and wax control of the oilfield produced fluid.
Example 3
The multifunctional wax inhibitor of the embodiment is prepared by the following steps:
the first step: 116g of maleic acid and 226g of n-hexadecanol were taken, and after mixing, the mixture was heated to 150℃and reacted with stirring for 1 hour, to give a yellow viscous liquid.
And a second step of: heating was stopped and cooled to 60 ℃. 105g of 2-vinyl pyridine, 176.5g of 2-chloromethyl naphthalene, 128g of butyl acrylate, 206g of beta-sodium styrene sulfonate, 8.2g of azo-iso Ding Qingji formamide and 1150g of ethanol are added into the reaction solution in the first step, then the reaction is carried out for 6 hours at constant temperature under the protection of nitrogen, and the heating is stopped, thus obtaining the final three-function pipeline chemical agent for corrosion inhibition, sterilization and wax control of the oilfield produced fluid.
Comparative example 1
The preparation method of the multifunctional wax inhibitor of the comparative example comprises the following steps:
the first step: 116g of maleic acid and 226g of n-stearyl alcohol were taken, mixed and heated to 140 ℃ and reacted for 2 hours with stirring to obtain a yellow viscous liquid.
And a second step of: heating was stopped and cooled to 60 ℃. 105g of 4-vinyl pyridine, 176.5g of 1-chloromethyl naphthalene, 128g of butyl acrylate, 206g of sodium p-styrene sulfonate, 8.2g of azodiisobutyronitrile and 1150g of ethanol are added into the reaction solution in the first step, then the reaction is carried out for 6 hours at constant temperature under the protection of nitrogen, and the heating is stopped, thus obtaining the final three-function pipeline chemical agent for corrosion inhibition, sterilization and wax control of the oilfield produced fluid.
Comparative example 2
The preparation method of the multifunctional wax inhibitor of the comparative example comprises the following steps:
the first step: 116g of maleic acid, 226g of dodecanol and tetradecanol (1:1) were taken, mixed and heated to 140℃and reacted with stirring for 2 hours to give a yellow viscous liquid.
And a second step of: heating was stopped and cooled to 60 ℃. 105g of 4-vinyl pyridine, 176.5g of 1-chloromethyl naphthalene, 128g of butyl acrylate, 206g of sodium p-styrene sulfonate, 8.2g of azodiisobutyronitrile and 1150g of ethanol are added into the reaction solution in the first step, then the reaction is carried out for 6 hours at constant temperature under the protection of nitrogen, and the heating is stopped, thus obtaining the final three-function pipeline chemical agent for corrosion inhibition, sterilization and wax control of the oilfield produced fluid.
Experiment one, corrosion inhibition Property
Simulation of CO 2 The corrosion inhibition performance evaluation is carried out in the environment of the flooding oil well, and the common pyridine quaternary ammonium salt corrosion inhibitor N-benzyl pyridine salt is used for comparison. Experimental conditions: 5% NaCl aqueous solution, CO 2 The partial pressure is 5.0MPa, the temperature is 90 ℃, the material is N80, and the experimental result is shown in Table 1.
TABLE 1 Corrosion inhibition Properties
It can be seen that the prepared multifunctional wax inhibitor can effectively inhibit corrosion, and the effect is similar to that of corrosion inhibitor N-benzyl pyridine salt chloride.
Experiment II, sterilizing Performance
The chemical agent provided in example 1 was evaluated. The specific evaluation process comprises the following steps: the bacterial water sample containing SRB in example 1 is subjected to sterilization test, the concentration of the chemical agent is 100mg/L, the bacterial water sample containing SRB is cultured for 24 hours at 30 ℃ after the chemical agent is added, the bacterial content is measured by adopting an MPN method, and the sterilization rate is calculated. Meanwhile, the pyridine quaternary ammonium salt corrosion inhibitor N-benzyl pyridine salt with a sterilization function is used for comparison. The results are shown in Table 2.
TABLE 2 Sterilization Properties
| Medicament | Concentration of test agent, ppm | SRB bacterial count, individual | Sterilization rate of% |
| Blank space | - | 2.5×10 3 | - |
| Example 1 | 100 | 0.2×10 2 | 99.2 |
| N-benzyl pyridinium chloride | 100 | 2.9×10 2 | 88.4 |
| Example 2 | 100 | 0.2×10 2 | 99.2 |
| Example 3 | 100 | 0.3×10 2 | 98.8 |
| Comparative example 1 | 100 | 1.6×10 2 | 93.6 |
| Comparative example 2 | 100 | 2.4×10 2 | 90.4 |
Experiment three, wax control Property
The results of example 1 were shown in Table 3 with reference to SY/T6300-2009, clear for oil recovery and wax control technical conditions.
Table 3 wax control rate
To sum up, the oil field CO 2 The preparation process of the corrosion inhibition, sterilization and wax control multifunctional agent for the drive oil well is simple and convenient, and the preparation can be carried out in 2 steps; the corrosion inhibition capability, the sterilization capability and the wax-proof capability are good, and as shown in the subsequent specific examples of the invention, the corrosion mainly caused by carbon dioxide corrosion can be inhibited, and the corrosion inhibition rate is superior to that of commercial pyridine quaternary ammonium salt with similar structure; can effectively kill Sulfate Reducing Bacteria (SRB), has a sterilization rate of more than 99.9 percent and is superior to commercial quaternary ammonium salt with similar structure; the wax-proof rate is more than 50%.
The foregoing detailed description is directed to one of the possible embodiments of the present invention, which is not intended to limit the scope of the invention, but is to be accorded the full scope of all such equivalents and modifications so as not to depart from the scope of the invention.
Claims (7)
1. The multifunctional wax inhibitor is characterized in that the raw materials of the wax inhibitor comprise maleic acid, alkyl alcohol, vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrenesulfonate compound, ethanol and azo initiator;
the alkyl alcohol is n-hexadecanol;
the sodium styrenesulfonate compound is any one or a mixture of more of sodium p-styrenesulfonate, sodium poly (4-styrenesulfonate) and sodium beta-styrenesulfonate;
the molar ratio of the maleic acid to the alkyl alcohol is 1:0.9-1:2.2;
the molar ratio of the vinyl pyridine to the 1-chloromethyl naphthalene is 1:0.8-1:1.5;
the molar ratio of the butyl acrylate to the sodium styrenesulfonate compound is 1:0.5-2;
the preparation method of the wax inhibitor comprises the following steps:
(1) Mixing maleic acid and alkyl alcohol, and reacting to obtain a mixed solution;
(2) Adding vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrenesulfonate compound, ethanol and azo initiator into the mixed solution, and reacting to obtain the catalyst;
the temperature of the reaction in the step (1) is 120-150 ℃, and the reaction time is 1-3 h;
and (3) cooling the mixed solution to 60-80 ℃ before adding in the step (2).
2. The wax inhibitor according to claim 1, wherein the vinyl pyridine is any one or more of 2-vinyl pyridine, 3-vinyl pyridine, 4-vinyl pyridine.
3. The wax inhibitor according to claim 1, wherein the azo initiator is any one or more of azobisisoheptonitrile, azobisisobutyronitrile Ding Qingji formamide, azobisisobutyronitrile hydrochloride.
4. A method for preparing the wax-proofing agent according to any one of claims 1 to 3, comprising the steps of:
(1) Mixing maleic acid and alkyl alcohol, and reacting to obtain a mixed solution;
(2) Adding vinyl pyridine, 1-chloromethylnaphthalene, butyl acrylate, sodium styrenesulfonate compound, ethanol and azo initiator into the mixed solution, and reacting to obtain the catalyst;
the temperature of the reaction in the step (1) is 120-150 ℃, and the reaction time is 1-3 h;
and (3) cooling the mixed solution to 60-80 ℃ before adding in the step (2).
5. The process according to claim 4, wherein the reaction in step (2) is carried out with stirring under nitrogen.
6. The method according to claim 4, wherein the reaction time in the step (2) is 6 to 8 hours.
7. Use of a wax-inhibiting agent according to any one of claims 1 to 3 for the preparation of a medicament having a corrosion-inhibiting, bactericidal or wax-inhibiting effect.
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