CN111978485A - Preparation method of surfactant alkylphenol ether sulfonate for improving recovery efficiency - Google Patents
Preparation method of surfactant alkylphenol ether sulfonate for improving recovery efficiency Download PDFInfo
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- CN111978485A CN111978485A CN202011011954.4A CN202011011954A CN111978485A CN 111978485 A CN111978485 A CN 111978485A CN 202011011954 A CN202011011954 A CN 202011011954A CN 111978485 A CN111978485 A CN 111978485A
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- alkylphenol
- sulfonate
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- alkylphenol polyoxyethylene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/334—Polymers modified by chemical after-treatment with organic compounds containing sulfur
- C08G65/3348—Polymers modified by chemical after-treatment with organic compounds containing sulfur containing nitrogen in addition to sulfur
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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Abstract
The invention discloses a preparation method of surfactant alkylphenol ether sulfonate for improving recovery efficiency, which comprises the following steps: s1, preparing alkylphenol ethoxylates, sulfamic acid, alpha-olefin sodium sulfonate, isopropanol and urea; s2, reacting alkylphenol polyoxyethylene with sulfamic acid at 130-150 ℃ to synthesize alkylphenol polyoxyethylene sulfonic acid, and then neutralizing with NaOH to generate alkylphenol polyoxyethylene sulfonate; s3, compounding alkylphenol polyoxyethylene ether sulfonate, alpha-olefin sodium sulfonate, isopropanol and urea by utilizing the synergistic effect of the surfactant. The product of the invention has better foaming performance, temperature resistance, salt resistance and low interfacial tension, reduces the interfacial tension of stratum sections, effectively improves the wettability and permeability of stratum rocks and the fluidity of crude oil, effectively strips off an oil film on the surface of the rocks, promotes the smooth production of thick oil, improves the recovery ratio, has no damage to the stratum, and has no influence on the production of an oil well because foams automatically disappear and block after the oil well stops injecting.
Description
Technical Field
The invention relates to the technical field of crude oil exploitation, in particular to a preparation method of surfactants alkylphenol ether sulfonates for improving recovery efficiency.
Background
The thick oil is difficult to be exploited due to high viscosity and low formation temperature, and the main modes of thick oil exploitation are steam huff and puff and steam flooding, which are exploited in the middle and later stages at present. In order to improve the steam injection quality and improve the steam injection effect, various surfactants are added during steam injection, so that the crude oil recovery rate is improved. The surfactant occupies an important position in oil field chemicals, particularly when thick oil is exploited, one product can be used as a high-temperature foaming agent and a high-temperature oil displacement cleanup additive, and the product with multiple functions has a wide application prospect.
The oil displacement and drainage assisting performance of a high-temperature foaming agent of the surfactant for improving the recovery ratio of crude oil is relatively poor, the high-temperature foaming performance of the high-temperature oil displacement and drainage assisting agent is poor, and the salt tolerance of the high-temperature foaming agent and the high-temperature oil displacement and drainage assisting agent is poor.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of surfactants alkylphenol ether sulfonates for improving recovery efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the surfactant alkylphenol ether sulfonate for improving the recovery ratio comprises the following steps:
s1, preparing alkylphenol ethoxylates, sulfamic acid, NaOH, alpha-olefin sodium sulfonate, isopropanol and urea;
s2, reacting alkylphenol polyoxyethylene with sulfamic acid at 130-150 ℃ to synthesize alkylphenol polyoxyethylene sulfonic acid, and then neutralizing with NaOH to generate alkylphenol polyoxyethylene sulfonate;
s3, compounding the alkylphenol polyoxyethylene sulfonate with alpha-olefin sodium sulfonate, isopropanol and urea by utilizing the synergistic action of the surfactant, thereby preparing the required product.
Preferably, the prepared product is applied to a steam injection well, and can be mixed with steam, carbon dioxide and brine to be injected into an oil layer to form a large amount of abundant foam, and the foam forms a Jamin effect in formation pores to block a high-permeability oil layer or a steam channeling layer, control steam channeling, overcome gravity override, reduce viscous fingering, reduce steam fluidity, adjust a steam injection profile, increase sweep efficiency, force steam to enter a medium-low permeability oil layer, and improve the reserve utilization degree of the medium-low permeability oil layer, so that an oil displacement effect is achieved, and the crude oil recovery rate is improved.
Preferably, when the alkylphenol polyoxyethylene reacts with sulfamic acid at the temperature of 130-150 ℃, a motor is adopted to drive a stirring shaft to stir, so that the reaction is conveniently and rapidly carried out.
Preferably, the carbon chain length of the alkylphenol in the alkylphenol polyoxyethylene ether is C6~12One or more of the above, and the addition number of ethylene oxide is 6-15.
Preferably, the carbon chain length of the alpha-olefin sodium sulfonate is C12~16One or more of them.
The product prepared by the invention has low interfacial tension, can obviously reduce the interfacial tension of stratum sections, effectively improve the wettability, permeability and diffusivity of stratum rocks and the fluidity of crude oil, effectively strip off the oil film on the surface of the rocks, promote the smooth extraction of thick oil in an oil reservoir and improve the recovery ratio of the crude oil, has no harm to the stratum, has the characteristics of self-disappearance and blockage removal of foam after the stop of an oil well and no influence on the production of the oil well, has the advantages of low surface tension and interfacial tension and good oil displacement effect besides the characteristics of stronger foaming capacity, better temperature resistance and better salt resistance than a common high-temperature foaming agent, and has better performance than the high-temperature foaming agent and the oil displacement assistant drainage product which are used at present.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The preparation method of the surfactant alkylphenol ether sulfonate for improving the recovery ratio comprises the following steps:
s1, preparing alkylphenol ethoxylates, sulfamic acid, NaOH, alpha-olefin sodium sulfonate, isopropanol and urea;
s2, reacting alkylphenol polyoxyethylene with sulfamic acid at 130-150 ℃ to synthesize alkylphenol polyoxyethylene sulfonic acid, and then neutralizing with NaOH to generate alkylphenol polyoxyethylene sulfonate;
s3, compounding the alkylphenol polyoxyethylene sulfonate with alpha-olefin sodium sulfonate, isopropanol and urea by utilizing the synergistic action of the surfactant, thereby preparing the required product.
Preferably, the prepared product is applied to a steam injection well, can be mixed with steam, carbon dioxide and saline water and injected into an oil layer to form a large amount of abundant foams, and the foams form a Jamin effect in formation pores to block a high-permeability oil layer or a steam channeling layer, control steam channeling, overcome gravity override, reduce viscous fingering, reduce steam fluidity, adjust a steam injection section, increase sweep efficiency, force steam to enter a medium-permeability oil layer and a low-permeability oil layer, and improve the reserve utilization degree of the medium-permeability oil layer and the low-permeability oil layer, so that an oil displacement effect is achieved, and the crude oil recovery rate is improved.
Preferably, when the alkylphenol polyoxyethylene reacts with sulfamic acid at the temperature of 130-150 ℃, a motor is adopted to drive a stirring shaft to stir, so that the reaction is conveniently and rapidly carried out.
Preferably, the carbon chain length of the alkylphenol in the alkylphenol polyoxyethylene ether is C6~12One or more of the above, and the addition number of ethylene oxide is 6-15.
Preferably, the carbon chain length of the alpha-olefin sodium sulfonate is C12~16One or more of them.
The product prepared by the invention has low interfacial tension, can obviously reduce the interfacial tension of stratum sections, effectively improve the wettability, permeability and diffusivity of stratum rocks and the fluidity of crude oil, effectively strip off a rock surface oil film, promote the smooth extraction of thick oil in an oil reservoir and improve the recovery ratio, has no harm to the stratum, has the characteristics of self disappearance and blockage removal of foam after an oil well stops injecting and does not influence the production of the oil well, has the advantages of low surface tension and interfacial tension, good salt resistance and good oil displacement effect compared with the prior high-temperature foaming agent and oil displacement assistant drainage product, and has better performance than the prior high-temperature foaming agent and oil displacement assistant drainage product.
The foaming performance (300 ℃,24h, concentration 0.5%, 200 mL) of the product after temperature resistance is more than 800 mL;
salt resistance {25 ℃, 0.5% saline (0.12% anhydrous CaCl2 and 0.12% MgCl2.6H2O mixed solution), 200 mL) } is greater than 850 mL;
the oil displacement efficiency is improved by more than 10 percent.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The preparation method of the surfactant alkylphenol ether sulfonate for improving the recovery ratio is characterized by comprising the following steps:
s1, preparing alkylphenol ethoxylates, sulfamic acid, NaOH, alpha-olefin sodium sulfonate, isopropanol and urea;
s2, reacting alkylphenol polyoxyethylene with sulfamic acid at 130-150 ℃ to synthesize alkylphenol polyoxyethylene sulfonic acid, and then neutralizing with NaOH to generate alkylphenol polyoxyethylene sulfonate;
s3, compounding the alkylphenol polyoxyethylene sulfonate with alpha-olefin sodium sulfonate, isopropanol and urea by utilizing the synergistic action of the surfactant, thereby preparing the required product.
2. The method of claim 1, wherein the surfactant alkylphenol ether sulfonates are used in gas wells to inject the mixture of steam, carbon dioxide and brine into oil reservoirs to form a large amount of abundant foam, which forms Jamin effect in formation pores to block high permeability oil reservoirs or gas channeling zones, control steam channeling, overcome gravity super-coverage, reduce viscous fingering, reduce steam fluidity, adjust steam injection profile, increase sweep efficiency, force steam into oil reservoirs of medium and low permeability, and increase reserve utilization of oil reservoirs of medium and low permeability, thereby achieving oil displacement and oil recovery.
3. The method for preparing surfactant alkylphenol ether sulfonates for enhanced oil recovery according to claim 1, wherein the alkylphenol ethoxylates is stirred by a motor-driven stirring shaft at 130-150 ℃ when reacting with sulfamic acid, which facilitates the reaction to proceed rapidly.
4. The method for preparing surfactant alkylphenol ether sulfonates for enhanced oil recovery according to claim 1, wherein the alkylphenol carbon chain length in the alkylphenol ethoxylates is C6~12One or more of the above, and one of 6-15 ethylene oxide addition numbers.
5. The method of claim 1, wherein the sodium alpha-olefin sulfonate has a carbon chain length of C12~16One or more of them.
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| CN202011011954.4A CN111978485A (en) | 2020-09-23 | 2020-09-23 | Preparation method of surfactant alkylphenol ether sulfonate for improving recovery efficiency |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5031698A (en) * | 1987-08-26 | 1991-07-16 | Shell Oil Company | Steam foam surfactants enriched in alpha olefin disulfonates for enhanced oil recovery |
| CN101328141A (en) * | 2007-06-19 | 2008-12-24 | 浙江工商大学 | Preparation of alkyl phenol polyethenoxy ether sodium sulfate |
| US20100048432A1 (en) * | 2008-08-22 | 2010-02-25 | Costello Michael T | Enhanced oil recovery using sulfonate mixtures |
| CN102086389A (en) * | 2010-12-31 | 2011-06-08 | 上海大学 | Temperature-resistant salt-resistant composite foam oil displacement agent for tertiary oil recovery and preparation method thereof |
| CN103937481A (en) * | 2014-05-07 | 2014-07-23 | 中国石油化工股份有限公司河南油田分公司石油勘探开发研究院 | High-temperature-resistant and low-tension foam flooding agent and preparation method thereof |
| CN106753307A (en) * | 2016-11-10 | 2017-05-31 | 东北石油大学 | A kind of heat-resistant salt-resistant blowing agent system and preparation method for heavy crude reservoir thermal recovery |
-
2020
- 2020-09-23 CN CN202011011954.4A patent/CN111978485A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5031698A (en) * | 1987-08-26 | 1991-07-16 | Shell Oil Company | Steam foam surfactants enriched in alpha olefin disulfonates for enhanced oil recovery |
| CN101328141A (en) * | 2007-06-19 | 2008-12-24 | 浙江工商大学 | Preparation of alkyl phenol polyethenoxy ether sodium sulfate |
| US20100048432A1 (en) * | 2008-08-22 | 2010-02-25 | Costello Michael T | Enhanced oil recovery using sulfonate mixtures |
| CN102086389A (en) * | 2010-12-31 | 2011-06-08 | 上海大学 | Temperature-resistant salt-resistant composite foam oil displacement agent for tertiary oil recovery and preparation method thereof |
| CN103937481A (en) * | 2014-05-07 | 2014-07-23 | 中国石油化工股份有限公司河南油田分公司石油勘探开发研究院 | High-temperature-resistant and low-tension foam flooding agent and preparation method thereof |
| CN106753307A (en) * | 2016-11-10 | 2017-05-31 | 东北石油大学 | A kind of heat-resistant salt-resistant blowing agent system and preparation method for heavy crude reservoir thermal recovery |
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