CN104017553A - Preparation method of surfactant applied to oil field - Google Patents
Preparation method of surfactant applied to oil field Download PDFInfo
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- CN104017553A CN104017553A CN201310478505.4A CN201310478505A CN104017553A CN 104017553 A CN104017553 A CN 104017553A CN 201310478505 A CN201310478505 A CN 201310478505A CN 104017553 A CN104017553 A CN 104017553A
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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 provides a preparation method of a surfactant applied to an oil field. The preparation method comprises the following steps of (a) in percentage by weight of raw materials, preparing raw materials according to the ratio of sulfonic acid to N,N-bihydroxyethyl alkyl amide to modified AES to salt to NPE to water quality stabilizer to PH regulator to clear water is 2:1:4:1:3:3:0.1:10; (b) at 25-45 DEG C, adding the clear water, the water quality stabilizer, the sulfonic acid, the N,N-bihydroxyethyl alkyl amide and the modified AES to a reactor according to the ratio in the step (a), quickly stirring for 15 minutes; adding the salt and stirring for 5 minutes; adding the NPE and the PH regulator, stirring and mixing uniformly, thus obtaining the finished product; and filling containers and warehousing. According to the preparation method of the surfactant applied to the oil field, the prepared surfactant is suitable for water injection in the oil field; the oil-water surface interfacial tension is greatly reduced, the hydrophilicity of a water injection oil replacement channel is improved, and the service life of a water injection pipe is prolonged.
Description
Technical field
The invention belongs to oil-field flooding technical field, relate to a kind of preparation method of Surfactants Used for Oil field.
Background technology
LOW PERMEABILITY RESERVOIR has the advantages that pore throat is tiny, seepage resistance large, water-drive oil recovery rate is low, and only applying larger displacement pressure liquid could flow, and can only improve water injection pressure for improving waterflooding development effect.
Current water filling is on the market mostly expensive with tensio-active agent, and quality differs, and purposes is too wide, and non-hydrophilic tensio-active agent is also sneaked into wherein, brings negative impact to oil-field flooding work, and can not effectively prevent that injection water quality is rotten.
Summary of the invention
The present invention, in order to solve the problems of the technologies described above the preparation method that a kind of Surfactants Used for Oil field is provided, is applicable to oil-field flooding, greatly reduces profit surface and interface tension force, improve the wetting ability of water filling for oily passage, extend the work-ing life of water injection pipe, improved LOW PERMEABILITY RESERVOIR, improved recovery ratio.
The present invention is achieved through the following technical solutions:
A preparation method for Surfactants Used for Oil field, comprises the following steps:
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: salt: polyoxyethylene nonylphenol ether: water quality stabilizer: the proportionlity configuration raw material of PH conditioning agent: clear water=2:1:4:1:3:3:0.1:10;
B) under the condition of 25 DEG C～45 DEG C of temperature, in reactor, add clear water in the ratio in step a), water quality stabilizer, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, add PH conditioning agent, adjusting pH value is 6.5-7.5, be uniformly mixed and get product, filling warehouse-in.
Described reactor is the mixed still of adjusting.
Described promoting agent model is SQ-2000 tensio-active agent.
Described water quality stabilizer is dodecyl benzyl dimethyl ammonium chloride and isothiazolinone; PH conditioning agent is citric acid or sodium carbonate.
Compared with prior art, the present invention has following useful technique effect:
The present invention is composite by negative and positive and nonionogenic tenside, realizes the technical feature of Surfactants Used for Oil field (SQ-2000), inexpensive.
The present invention reduces LOW PERMEABILITY RESERVOIR water injection pressure, improves oil displacement efficiency, and the relative permeability of oil and water all rises, and two-phase flow scope broadens, and rock wettability is to hydrophilic side to skew, and SQ-2000 tensio-active agent can improve LOW PERMEABILITY RESERVOIR, improves recovery ratio.
Promoting agent provided by the invention makes oil-field flooding promoting agent specialization, Focus, hydrophilization.And pass through the improvement to processing step, and the variation of composition of raw materials is reduced to the cost of water filling promoting agent.Because SQ-2000 has hydrophilic group and oleophilic group, its molecule can produce and align in solvent, reaches and changes capillary effect.Meanwhile, tensio-active agent is amphiphile, amphiphilic molecule, and hydrophilic group is polar group, and oleophilic group is exactly hydrocarbon chain.After tensio-active agent is water-soluble, because oleophilic moiety wishes to depart from water, therefore at surface enrichment (being called surface adsorption), hydrophilic group is inserted in water, oleophilic group erects at the water surface.Equal the surface of water to become the compact arranged surface of oleophilic group, this surface is equivalent to the surface of alkane, and surface tension reduces.Therefore, this promoting agent reduces profit surface and interface tension force and reduces water injection pressure, stablizes the work-ing life of injection water quality prolongation waterflood-transmission line.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
Embodiment 1:
A preparation method for Surfactants Used for Oil field, comprises the following steps:
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: the proportionlity configuration raw material of salt: polyoxyethylene nonylphenol ether: dodecyl benzyl dimethyl ammonium chloride: citric acid: clear water=2:1:4:1:3:3:0.1:10;
B), under the condition of 25 DEG C of temperature, add clear water in the ratio in step a), dodecyl benzyl dimethyl ammonium chloride to mixed tune in still, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, and add citric acid, regulating PH is 6.5, be uniformly mixed and get product, filling warehouse-in, 25kg/ bucket or 210kg/ bucket.
Embodiment 2:
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: the proportionlity configuration raw material of salt: polyoxyethylene nonylphenol ether: isothiazolinone: sodium carbonate: clear water=2:1:4:1:3:3:0.1:10;
B), under the condition of 35 DEG C of temperature, add clear water in the ratio in step a), isothiazolinone to mixed tune in still, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, and add sodium carbonate, regulating pH value is 7.0, be uniformly mixed and get product, filling warehouse-in, 25kg/ bucket or 210kg/ bucket.
Embodiment 3
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: the proportionlity configuration raw material of salt: polyoxyethylene nonylphenol ether: dodecyl benzyl dimethyl ammonium chloride: sodium carbonate: clear water=2:1:4:1:3:3:0.1:10;
B), under the condition of temperature 45 C, add clear water in the ratio in step a), dodecyl benzyl dimethyl ammonium chloride to mixed tune in still, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, and add sodium carbonate, regulating pH value is 7.5, be uniformly mixed and get product, filling warehouse-in, 25kg/ bucket or 210kg/ bucket.
Embodiment 4
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: the proportionlity configuration raw material of salt: polyoxyethylene nonylphenol ether: isothiazolinone: citric acid: clear water=2:1:4:1:3:3:0.1:10;
B), under the condition of 25 DEG C～45 DEG C of temperature, add clear water in the ratio in step a), isothiazolinone to mixed tune in still, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, and add citric acid, regulating pH value is 7.2, be uniformly mixed and get product, filling warehouse-in, 25kg/ bucket or 210kg/ bucket.
The present invention is composite by negative and positive and nonionogenic tenside, realizes the technical feature of Surfactants Used for Oil field (SQ-2000), inexpensive.
The present invention reduces LOW PERMEABILITY RESERVOIR water injection pressure, improves oil displacement efficiency, and the relative permeability of oil and water all rises, and two-phase flow scope broadens, and rock wettability is to hydrophilic side to skew, and SQ-2000 tensio-active agent can improve LOW PERMEABILITY RESERVOIR, improves recovery ratio.
Promoting agent provided by the invention makes oil-field flooding promoting agent specialization, Focus, hydrophilization.And pass through the improvement to processing step, and the variation of composition of raw materials is reduced to the cost of water filling promoting agent.Because SQ-2000 has hydrophilic group and oleophilic group, its molecule can produce and align in solvent, reaches and changes capillary effect.Meanwhile, tensio-active agent is amphiphile, amphiphilic molecule, and hydrophilic group is polar group, and oleophilic group is exactly hydrocarbon chain.After tensio-active agent is water-soluble, because oleophilic moiety wishes to depart from water, therefore at surface enrichment (being called surface adsorption), hydrophilic group is inserted in water, oleophilic group erects at the water surface.Equal the surface of water to become the compact arranged surface of oleophilic group, this surface is equivalent to the surface of alkane, and surface tension reduces.Therefore, this promoting agent reduces profit surface and interface tension force and reduces water injection pressure, stablizes the work-ing life of injection water quality prolongation waterflood-transmission line.
The present invention has verified the feasibility of SQ-2000 tensio-active agent in LOW PERMEABILITY RESERVOIR application by engineering practice, for the oil recovery factor that improves LOW PERMEABILITY RESERVOIR provides method reference.
The present invention is applicable to the special surfactant of oil-field flooding, dependable performance, environmental protection and public nuisance free, and can effectively prevent that injection water quality is rotten, significantly reduce profit surface and interface tension force, change Surface of Carbonate Rocks wettability, improve the wetting ability of water filling for oily passage, strengthen water filling startup and involve ability, promoting agent has good penetrance simultaneously, can penetrate oil film, clean the irreducible oil of rock surface, reduce water drive residual oil saturation.Rearmounted part replaces slug, replaces to depths, stratum, prevents from returning and tells, prolonged stay stratum.Finally reach and improve injected water displacement efficiency, increase the effect of " water filling is for oil ".
Claims (4)
1. a preparation method for Surfactants Used for Oil field, is characterized in that, comprises the following steps:
A) with material percentage calculation, by sulfonic acid: N.N-double hydroxyethyl alkylamide: modification lauryl alcohol polyoxydivinyl ether sodium sulfate: salt: polyoxyethylene nonylphenol ether: water quality stabilizer: the proportionlity configuration raw material of PH conditioning agent: clear water=2:1:4:1:3:3:0.1:10;
B) under the condition of 25 DEG C～45 DEG C of temperature, in reactor, add clear water in the ratio in step a), water quality stabilizer, sulfonic acid, N.N-double hydroxyethyl alkylamide, modification lauryl alcohol polyoxydivinyl ether sodium sulfate, rapid stirring 15 minutes, add salt to stir 5 minutes, add polyoxyethylene nonylphenol ether, and add PH conditioning agent, adjusting pH value is 6.5-7.5, be uniformly mixed and get product, filling warehouse-in.
2. the preparation method of Surfactants Used for Oil field according to claim 1, is characterized in that, described reactor is the mixed still of adjusting.
3. the preparation method of Surfactants Used for Oil field according to claim 1, is characterized in that, described promoting agent is SQ-2000 tensio-active agent.
4. the preparation method of Surfactants Used for Oil field according to claim 1, is characterized in that, described water quality stabilizer is dodecyl benzyl dimethyl ammonium chloride and isothiazolinone; PH conditioning agent is citric acid or sodium carbonate.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255127A (en) * | 2008-04-01 | 2008-09-03 | 江南大学 | Synthesis of aliphatic alcohol polyoxyethylene sulfonate and complex formulation used for tertiary oil recovery displacement agent |
| CN101279936A (en) * | 2007-04-04 | 2008-10-08 | 中国石油化工股份有限公司 | Alkyl phenol sulfonic polyoxyethylene ether sulfate and preparation thereof |
| US7482310B1 (en) * | 2003-11-12 | 2009-01-27 | Kroff Chemical Company, Inc. | Method of fracturing subterranean formations utilizing emulsions comprising acrylamide copolymers |
| CN101462844A (en) * | 2009-01-08 | 2009-06-24 | 广州澳润合成材料有限公司 | Environment protection type efficient aerating powder for shield construction |
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- 2013-10-12 CN CN201310478505.4A patent/CN104017553B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7482310B1 (en) * | 2003-11-12 | 2009-01-27 | Kroff Chemical Company, Inc. | Method of fracturing subterranean formations utilizing emulsions comprising acrylamide copolymers |
| CN101279936A (en) * | 2007-04-04 | 2008-10-08 | 中国石油化工股份有限公司 | Alkyl phenol sulfonic polyoxyethylene ether sulfate and preparation thereof |
| CN101255127A (en) * | 2008-04-01 | 2008-09-03 | 江南大学 | Synthesis of aliphatic alcohol polyoxyethylene sulfonate and complex formulation used for tertiary oil recovery displacement agent |
| CN101462844A (en) * | 2009-01-08 | 2009-06-24 | 广州澳润合成材料有限公司 | Environment protection type efficient aerating powder for shield construction |
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