CN103666434B - A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent - Google Patents

A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent Download PDF

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CN103666434B
CN103666434B CN201210345783.8A CN201210345783A CN103666434B CN 103666434 B CN103666434 B CN 103666434B CN 201210345783 A CN201210345783 A CN 201210345783A CN 103666434 B CN103666434 B CN 103666434B
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oil
formaldehyde resin
phenol formaldehyde
displacement agent
sulfonated phenol
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CN103666434A (en
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秦冰
黄娟
李财富
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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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
    • C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
    • 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
    • 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
    • C09K8/588—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 polymers

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Organic Chemistry (AREA)
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Abstract

The present invention relates to a kind of high temperature resistant heavy crude heat extraction compound oil displacement agent, this oil-displacing agent is the aqueous solution, according to the mass fraction, this oil-displacing agent contains the sodium salt of the sulfonated phenol formaldehyde resin of 0.001 ~ 20 part and/or calcium salt, the displacement of reservoir oil nonionogenic tenside of 0.001 ~ 20 part and/or displacement of reservoir oil Nonionic Anionic Surfactants; The number-average molecular weight of described sulfonated phenol formaldehyde resin is 2000 ~ 200000, and in described sulfonated phenol formaldehyde resin, the massfraction of sulphur is 5% ~ 20%.This oil-displacing agent has alkali-free, high-temperature resistance is strong, interface performance good, viscosity break ratio is high, low cost and other advantages.

Description

A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent
Technical field
The present invention relates to a kind of high temperature resistant heavy crude heat extraction compound oil displacement agent.
Background technology
In recent years, along with petroleum demand constantly soaring and conventional crude output constantly reduce, heavy oil development is just year by year deeply.For improving thick oil recovery ratio, at home and abroad steam flood has become the heavy crude heat extraction technology of heavy industrialization application.And the feature such as burying of domestic heavy crude reservoir is dark, steam injection pressure is high, mass dryness fraction is low, hydrothermal area is wide, have a strong impact on the oil displacement efficiency of steam flood, therefore relevant art tackling key problem must be carried out, specializes in chemistry assisted steam flooding, to improve the effect of steam flood further, reaches the target increasing substantially recovery ratio.
Steam drive development requires higher to the heat resistance of oil-displacing agent, steam swept zone temperature range 100 DEG C ~ 220 DEG C, the temperature field of steam is along steam injection well about 150m radius, therefore, oil-displacing agent must high temperature resistant and comparatively grow tall temperature time limit inner boundary performance do not change; Steam-drive process requires higher to the interface performance of oil-displacing agent, when reservoir temperature raises, under the condition that viscous force significantly declines, how to reduce capillary force and become the key affecting exploitation effect, therefore reducing remaining oil saturation and namely reduce interfacial tension, is current problem in the urgent need to address.As can be seen here, for the low principal contradiction affecting steam drive development of displacement efficiency under hot conditions, the oil-displacing agent system developing high temperature resistant high interfacial activity improves the key of steam drive development effect further.
At present, in the surfactant oil displacement that oil field is conventional, bibliographical information and practical application more be nonionogenic tenside, anion surfactant, amphoterics, Gemini surface active agent and the compound between them, although oil displacement efficiency is better, but still there is the shortcomings such as temperature tolerance difference, formation stability is poor, interface performance is poor, price is high, and most oil-displacing agent is not obvious to the viscosity reduction ability of viscous crude and washing oil ability effect, such as:
US 4016932 reports using the composite method as oil-displacing agent of sulfonated petro-leum, polyoxyethylene nonylphenol ether and alkali, can be used for highly mineralized formation brines, but its temperature tolerance is limited, and because containing a large amount of bituminous matters and colloid in viscous crude, field conditions is more special, and the ability of above-mentioned formula system to the washing oil ability of viscous crude and reduction interfacial tension has much room for improvement.
WO 00/37775 discloses a kind of alkylaryl sulfonate surfactants of a specific class that adopts and carries out the method for recovering the oil.This tensio-active agent is that alpha-olefin logistics and the aromatic raw material in wide distribution being 12-58 by average carbon atom number reacts sulfonation afterwards and obtain.This tensio-active agent is to crude oil, and particularly waxy crude oil has high solublization and can form with it the interface of ultra low interfacial tension, but its temperature tolerance and not mentioned for the effect of viscous crude.
CN 102002354A reports a kind of oil displacement agent with ultra-low oil-water interfacial tension, and this oil-displacing agent comprises zwitterionics, nonionogenic tenside and water.Wherein zwitterionics is the trimethyl-glycine surfactivity containing C12-C16, and nonionogenic tenside is a kind of molecule containing 9 ~ 10 polyoxyethylene groups.Described oil-displacing agent is in the temperature range of 25 ~ 85 DEG C, and without the need to adding alkali, just oil water interfacial tension can be made to be down to ultralow.But at the temperature more than 100 DEG C, the interfacial activity of oil-displacing agent reduces, and cost is also too high.
CN 102161883A reports a kind of tertiary oil production in oil field chemical combined flooding finish, is to be formed by three kinds of surfactant compounds.Wherein, cats product is made up of branched-chain alkyl quaternary ammonium salt and chlorion or bromide anion; Anion surfactant adds the hydridization sulfonate of several polyoxyethylene group or vitriol or carboxylate salt; Nonionic is the tensio-active agent containing branched hydrophobe group and polyoxyethylene group.Although the formation that in this oil-displacing agent, zwitterion is right can make it form interfacial adsorption film closely, reduce interfacial tension to a certain extent, stratum clay mostly is electronegativity, cause cation-adsorption to lose large, and cost is also higher.
Sulfonated phenol formaldehyde resin is the most frequently used filtrate reducer for drilling fluid.Prior art discloses the synthesis technique of multiple sulfonated phenol formaldehyde resin, as Chinese patent application CN101942069A, CN102241803A etc.Prior art also discloses multiple method of sulfonated phenol formaldehyde resin being carried out to modification, as Yang little Hua disclose a kind of amine modification sulphonation resol fluid loss agent SCP (oilfield chemistry. the 13rd volume the 3rd phase .259 ~ 260), Li Yao etc. disclose a kind of amphoteric ion type sulfonated phenol formaldehyde resin (western mineral exploration engineering .2010 the 1st phase .43 ~ 46), and CN102241804A discloses a kind of preparation method of coupling phenolic resin used for drilling fluid.Up to now, there are no report sulfonated phenol formaldehyde resin being used for viscous oil recovery field.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of composite heavy crude heat extraction oil-displacing agent, this oil-displacing agent contains sulfonated phenol formaldehyde resin and nonionogenic tenside and/or Nonionic Anionic Surfactants, has alkali-free, high-temperature resistance is strong, interface performance good, viscosity break ratio is high, low cost and other advantages.
A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent, this oil-displacing agent is the aqueous solution, according to the mass fraction, this oil-displacing agent contains the sodium salt of the sulfonated phenol formaldehyde resin of 0.001 ~ 20 part and/or calcium salt, the displacement of reservoir oil nonionogenic tenside of 0.001 ~ 20 part and/or displacement of reservoir oil Nonionic Anionic Surfactants; The number-average molecular weight of described sulfonated phenol formaldehyde resin is 2000 ~ 200000, and in described sulfonated phenol formaldehyde resin, the massfraction of sulphur is 5% ~ 20%.
The present invention has no particular limits the water yield in compound oil displacement agent, as long as described oil-displacing agent can be made to have good mobility.According to the mass fraction, this oil-displacing agent is generally containing the water of 20 ~ 100 parts.
In described sulfonated phenol formaldehyde resin, the massfraction of sulphur is preferably 7% ~ 14%.
In preferred situation, according to the mass fraction, described oil-displacing agent contains the sodium salt of the sulfonated phenol formaldehyde resin of 0.01 ~ 5 part and/or calcium salt, the displacement of reservoir oil nonionogenic tenside of 0.01 ~ 5 part and/or displacement of reservoir oil Nonionic Anionic Surfactants.
The number-average molecular weight of described sulfonated phenol formaldehyde resin is preferably 2000 ~ 50000.
Phenolic compound and aldehyde compound polycondensation and the resin obtained is referred to as resol.In the present invention, the polycondensation monomer of sulfonated phenol formaldehyde resin is had no particular limits, but from the ready availability of raw material and cost consideration, phenolic monomers of the present invention preferably has one or more in the phenol of following characteristics: containing one or two phenolic hydroxyl group, one or two phenyl ring and carbon number is 6 ~ 20; Be more preferably one or more in cresols, xylenol, ethylphenol, phenylphenol, butylphenol, amyl phenol, dihydroxyphenyl propane and Resorcinol; Aldehyde monomers is preferably one or more in formaldehyde, acetaldehyde, paraformaldehyde and furfural, is more preferably formaldehyde or polycondensation formaldehyde.
Sulfonated phenol formaldehyde resin in the present invention can be buied from market easily, the method preparation that classical documents also can be adopted to record.Sulfonated phenol formaldehyde resin generally can adopt the mode of the following sulfonation limit polycondensation of alkaline condition to prepare, and sulphonating agent can adopt Sodium Pyrosulfite.
Under normal circumstances, the polycondensation monomer of described sulfonated phenol formaldehyde resin is only phenolic monomers and aldehyde monomers two kinds, and does not also carry out modification to sulfonated phenol formaldehyde resin.But the art is known, except phenolic compound and aldehyde compound, the polycondensation monomer of other kind can also be added in polycondensation process; Also can by the mode such as coupling, grafting to phenolic resin modified.Sulfonated phenol formaldehyde resin of the present invention comprises the sulfonated phenol formaldehyde resin that above-mentioned approach obtains, only otherwise violate object of the present invention.
Described displacement of reservoir oil nonionogenic tenside and displacement of reservoir oil Nonionic Anionic Surfactants comprise any the type tensio-active agent that can be used for Oil extraction oil-displacing agent.
Described displacement of reservoir oil nonionogenic tenside can be one or more in alkylphenol or fatty alcohol-polyoxyethylene ether, sorbitan ester or sucrose fatty ester and alkylol amide.
The oxygen vinyl polymerization degree of described alkylphenol or fatty alcohol-polyoxyethylene ether is generally between 3 ~ 90, and preferably between 10 ~ 40, total carbon number of alkyl or alkane phenyl is 6 ~ 20, is preferably 8 ~ 16.
Fatty acid alkyl carbon number in described sorbitan ester or sucrose fatty ester is 6 ~ 20, is preferably 8 ~ 18.
Described alkylol amide is one or more in fatty monoethanol amide and fatty diglycollic amide, and the alkyl carbon number of lipid acid is 6 ~ 20, is preferably 8 ~ 18.Described alkylol amide is preferably coconut oil fatty acid monoethanolamide and/or cocoanut fatty acid diethanolamide.
Described Nonionic Anionic Surfactants is selected from one or more in the phosphate ester salt of alkylphenol or fatty alcohol-polyoxyethylene ether, sulfuric acid, carboxylate salt and sulfonate.General formula is written as respectively:
R-O-（CH 2CH 2O） n-PO 3M 2
R-O-（CH 2CH 2O） n-SO 3M
R-O-（CH 2CH 2O） n-CH 2COOM
R-O-（CH 2CH 2O） n-R’SO 3M
R is alkyl or alkane phenyl, and total carbon number is 6 ~ 20, preferably 8 ~ 16; N is oxygen vinyl polymerization degree, and its value is 3 ~ 90; M is monovalent metal cation or NH 4 +, the carbon number of R ' is 1 ~ 6 scope.Preferred Nonionic Anionic Surfactants is: C6 ~ C20 alkylphenol (or fatty alcohol) polyethenoxy ether carboxylate, C6 ~ C20 alkylphenol (or fatty alcohol) polyethenoxy ether sulphonate, C6 ~ C20 alkylphenol (or fatty alcohol) polyoxyethylene ether phosphate salt, C6 ~ C20 alkylphenol (or fatty alcohol) polyoxyethylene ether sulfate.
Sulfonated phenol formaldehyde resin is a kind of water-soluble polymers being rich in hydroxyl, sulfonic group and phenyl ring, and it applies for many years as fluid loss agent in drilling fluid, but up to now there are no the report using it for viscous oil recovery field.The present inventor finds that sulfonated phenol formaldehyde resin has and well washes viscous crude ability and high thermal resistance, is applicable to the high temperature (general 180 ~ 200 DEG C) of heavy crude heat extraction and cheap; Nonionogenic tenside has non-ionizing feature in water, and stability is high in the solution, good with other types surfactant compatibility, nonionic-anion surfactant also has good heat-resistant salt-resistant, use composite with sulfonated phenol formaldehyde resin, can improve sulfonated phenol formaldehyde resin and form the compactness of adsorption film at interface, composite oil-displacing agent is at low concentration and when not adding alkali, just can form ultra low interfacial tension and stable performance.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1
For two northern viscous crude in Shengli Oil Field (50 DEG C of viscosity are 15470mPa.s), by compound oil displacement agent (sulfonation phenoxy acetic acid phenol formaldehyde resin, the massfraction of sulphur is about 10.8%, number-average molecular weight is between 40000 ~ 50000, polyoxyethylene nonylphenol ether sulfuric acid, NPES-428, chemical Technology Co., Ltd. product of section of Foshan City, the two mass ratio is 7:3) be made into the aqueous solution that concentration is 0.3%, measure the oil water interfacial tension at its 50 DEG C with a rotation interfacial tensimeter, test result is in table 1.
Take viscous crude 100g, add the oil-displacing agent solution that 50g concentration is 1.5%, stir after 5 minutes at 80 DEG C, the thick oil viscosity of emulsification tested by Hakke VT550 type rotational viscosimeter (100r/m), and test result is in table 1.
Take a certain amount of viscous crude, petroleum pitch, complete smart wax, dissolve mix after be configured to artificial greasy dirt, with 30 ~ 60 DEG C of petroleum ether dissolution greasy dirts, and it is mixed with quartz sand, steaming petroleum ether oil-sand.Then clean oil-sand with the oil-displacing agent solution of 0.3%, then test through ultraviolet and calculate its washing oil rate (use standard is Q/SH1020 1518-2006), the results are shown in Table 1.
Embodiment 2
For Shengli Oil Field Dan Jia temple viscous crude (50 DEG C of viscosity are 9096mPa.s), by compound oil displacement agent (sulphonated phenol urea-formaldehyde resin, the massfraction of sulphur is about 13.7%, number-average molecular weight between 15000 ~ 20000, anhydrous sorbitol cetylate, SPAN-40, Jiangsu Hai'an Petrochemical Plant's product, the two mass ratio is 8:2) be made into the aqueous solution that concentration is 0.3%, measure the oil water interfacial tension at its 50 DEG C with a rotation interfacial tensimeter, test result is in table 1.
Take viscous crude 100g, add the oil-displacing agent solution that 50g concentration is 1.5%, stir after 5 minutes at 80 DEG C, the thick oil viscosity of emulsification tested by Hakke VT550 type rotational viscosimeter (100r/m), and test result is in table 1.
According to the method configuration oil-sand of embodiment 1, then clean oil-sand with the oil-displacing agent solution of 0.3%, then test through ultraviolet and calculate its washing oil rate (use standard is Q/SH1020 1518-2006), the results are shown in Table 1.
Embodiment 3
For From Liaohe Heavy Crude (50 DEG C of viscosity are 4660mPa.s), by compound oil displacement agent (sulfonated phenol formaldehyde resin, the massfraction of sulphur is about 7.3%, number-average molecular weight between 6000 ~ 8000, Oleum Cocois alkylolamide, 6501, the emerging milky way Chemical Co., Ltd. in Hubei product, the two mass ratio is 6:4) be made into the aqueous solution that concentration is 0.3%, measure the oil water interfacial tension at its 50 DEG C with a rotation interfacial tensimeter, test result is in table 1.
Take viscous crude 100g, add the oil-displacing agent solution that 50g concentration is 1.5%, stir after 5 minutes at 80 DEG C, the thick oil viscosity of emulsification tested by Hakke VT550 type rotational viscosimeter (100r/m), and test result is in table 1.
According to the method configuration oil-sand of embodiment 1, then clean oil-sand with the oil-displacing agent solution of 0.3%, then test through ultraviolet and calculate its washing oil rate (use standard is Q/SH1020 1518-2006), the results are shown in Table 1.
Embodiment 4
By sulfonated phenol formaldehyde resin (massfraction of sulphur is about 9.1%, and number-average molecular weight is between 6000 ~ 8000) aging 3h at 300 DEG C.
For Xinjiang Tahe Heavy Crude (50 DEG C of viscosity are 32210mPa.s), by compound oil displacement agent (aging rear sulfonated phenol formaldehyde resin, polyoxyethylene octadecanol, paregal O-10, Yixing City Jia Jia Chemical Co., Ltd. product, the two mass ratio is 75:25) be made into the aqueous solution that concentration is 0.3%, measure the oil water interfacial tension at its 50 DEG C with a rotation interfacial tensimeter, test result is in table 1.
Take viscous crude 100g, add the oil-displacing agent solution that 50g concentration is 1.5%, stir after 5 minutes at 80 DEG C, the thick oil viscosity of emulsification tested by Hakke VT550 type rotational viscosimeter (100r/m), and test result is in table 1.
According to the method configuration oil-sand of embodiment 1, then clean oil-sand with the oil-displacing agent solution of 0.3%, then test through purple and calculate its washing oil rate (use standard is Q/SH1020 1518-2006), the results are shown in Table 1.
Comparative example 1
With commercially available nonionic-anion surfactant NPS-10(4-dodecylphenol polyoxyethylene ether sulfate, Zibo Hai Jie Chemical Co., Ltd. product) replace compound oil displacement agent described in example 1, other dosage used, concentration, step are all identical with embodiment 1, and test result is in table 1.
Comparative example 2
With commercially available mahogany acid salt form surfactant PS-1(Dongying City section profit Fine Chemical Works product) replace compound oil displacement agent described in embodiment 2, other dosage used, concentration, step are all identical with embodiment 2, and test result is in table 1.
Comparative example 3
By commercially available sorbitan fatty acid ester S-20(Zibo Hai Jie Chemical Co., Ltd. product) aging 3h at 300 DEG C.Then the S-20 after aging is replaced compound oil displacement agent described in embodiment 4, other dosage used, concentration, step are all identical with embodiment 4, and test result is in table 1.
Table 1
Oil-displacing agent type Interfacial tension, mN/m Viscosity, mPa.s Washing oil rate/%
Embodiment 1 8×10 -2 43 92.43
Embodiment 2 4×10 -2 140 92.74
Embodiment 3 6×10 -2 130 93.33
Embodiment 4 6×10 -2 89 83.86
Comparative example 1 9×10 -1 68 79.85
Comparative example 2 9×10 -2 Not emulsification 47.54
Comparative example 3 3×10 -1 Not emulsification 65.86

Claims (15)

1. a high temperature resistant heavy crude heat extraction compound oil displacement agent, this oil-displacing agent is the aqueous solution, according to the mass fraction, this oil-displacing agent contains the sodium salt of the sulfonated phenol formaldehyde resin of 0.001 ~ 20 part and/or calcium salt, the displacement of reservoir oil nonionogenic tenside of 0.001 ~ 20 part and/or displacement of reservoir oil Nonionic Anionic Surfactants; The number-average molecular weight of described sulfonated phenol formaldehyde resin is 2000 ~ 200000, and in described sulfonated phenol formaldehyde resin, the massfraction of sulphur is 5% ~ 20%.
2. according to compound oil displacement agent according to claim 1, it is characterized in that, in described sulfonated phenol formaldehyde resin, the massfraction of sulphur is 7% ~ 14%.
3. according to compound oil displacement agent according to claim 1, it is characterized in that, according to the mass fraction, described oil-displacing agent contains the sodium salt of the sulfonated phenol formaldehyde resin of 0.01 ~ 5 part and/or calcium salt, the displacement of reservoir oil nonionogenic tenside of 0.01 ~ 5 part and/or displacement of reservoir oil Nonionic Anionic Surfactants.
4. according to compound oil displacement agent according to claim 1, it is characterized in that, the number-average molecular weight of described sulfonated phenol formaldehyde resin is 2000 ~ 50000.
5. according to compound oil displacement agent according to claim 1, it is characterized in that, in the polycondensation monomer of described sulfonated phenol formaldehyde resin, phenolic monomers is have one or more in the phenol of following characteristics: containing one or two phenolic hydroxyl group, one or two phenyl ring and carbon number is 6 ~ 20.
6. according to compound oil displacement agent according to claim 5, it is characterized in that, in the polycondensation monomer of described sulfonated phenol formaldehyde resin, phenolic monomers is one or more in cresols, xylenol, ethylphenol, phenylphenol, butylphenol, amyl phenol, dihydroxyphenyl propane and Resorcinol.
7. according to compound oil displacement agent according to claim 1, it is characterized in that, in the polycondensation monomer of described sulfonated phenol formaldehyde resin, aldehyde monomers is one or more in formaldehyde, acetaldehyde, paraformaldehyde and furfural.
8. according to compound oil displacement agent according to claim 7, it is characterized in that, in the polycondensation monomer of described sulfonated phenol formaldehyde resin, aldehyde monomers is formaldehyde or paraformaldehyde.
9. according to compound oil displacement agent according to claim 1, it is characterized in that, described displacement of reservoir oil nonionogenic tenside is one or more in alkylphenol or fatty alcohol-polyoxyethylene ether, sorbitan ester or sucrose fatty ester and alkylol amide.
10. according to compound oil displacement agent according to claim 9, it is characterized in that, the oxygen vinyl polymerization degree of described alkylphenol or fatty alcohol-polyoxyethylene ether is between 3 ~ 90, and total carbon number of alkyl or alkane phenyl is 6 ~ 20.
11., according to compound oil displacement agent according to claim 9, is characterized in that, the fatty acid alkyl carbon number in described sorbitan ester or sucrose fatty ester is 6 ~ 20.
12., according to compound oil displacement agent according to claim 9, is characterized in that, described alkylol amide is one or more in fatty monoethanol amide and fatty diglycollic amide, and the alkyl carbon number of lipid acid is 6 ~ 20.
13., according to compound oil displacement agent according to claim 12, is characterized in that, described alkylol amide is coconut oil fatty acid monoethanolamide and/or cocoanut fatty acid diethanolamide.
14., according to compound oil displacement agent according to claim 1, is characterized in that, described Nonionic Anionic Surfactants is selected from one or more in the phosphate ester salt of alkylphenol or fatty alcohol-polyoxyethylene ether, sulfuric acid, carboxylate salt and sulfonate.
15., according to compound oil displacement agent according to claim 1, is characterized in that, according to the mass fraction, described oil-displacing agent contains the water of 20 ~ 100 parts.
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CN101942069A (en) * 2010-09-07 2011-01-12 四川正蓉实业有限公司 Method for preparing modified sulfomethal phenolaldehy resin for drilling liquid
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CN102391842A (en) * 2011-09-28 2012-03-28 中国石油化工集团公司 Polyamine drilling fluid

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CN101942069A (en) * 2010-09-07 2011-01-12 四川正蓉实业有限公司 Method for preparing modified sulfomethal phenolaldehy resin for drilling liquid
CN102002354A (en) * 2010-11-02 2011-04-06 上海大学 Oil displacement agent with ultra-low oil-water interfacial tension and application thereof
CN102391842A (en) * 2011-09-28 2012-03-28 中国石油化工集团公司 Polyamine drilling fluid

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