CN110483340A - The preparation and the application in oilfield stimulation working solution of heat-resistant salt-resistant type viscoelastic surfactant - Google Patents
The preparation and the application in oilfield stimulation working solution of heat-resistant salt-resistant type viscoelastic surfactant Download PDFInfo
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
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- C07—ORGANIC CHEMISTRY
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- C07C309/01—Sulfonic acids
- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/03—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C309/13—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
- C07C309/14—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton containing amino groups bound to the carbon skeleton
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/703—Foams
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/94—Foams
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/30—Viscoelastic surfactants [VES]
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Abstract
The invention proposes a kind of preparation method of amphoteric ionic Gemini viscoelastic surfactant containing benzene ring structure and betaine structure and using it as the water base clean fracturing fluid of the high salinity of thickening agent, the formula of VES foam fracturing fluid.The water base clean fracturing fluid of high salinity, it includes above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant 2-5wt%, inorganic salts account for 3-20wt%, and surplus is water, i.e., the clean fracturing fluid prepared with salinity in the ocean water or stratum output water of 30000-150000mg/L.The type viscoelastic surfactant can directly be prepared using high salinity stratum output water, and fracturing fluid heatproof, the resistant to shearing prepared are good, in 160 DEG C, 170s‑1Shearing condition under, viscosity maintains 50mPa.s or more after 2 hours.High salinity VES foam fracturing fluid, its liquid phase part includes above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant 1-3wt%, and 0.3-0.6wt% neopelex (SDBS), inorganic salts account for 3-15wt%, surplus is water, i.e., the VES solution prepared with salinity in the ocean water or stratum output water of 30000-150000mg/L；Gas phase is nitrogen, and foam quality (foam quality) is 70%-85%, and half foam life period is at 90 DEG C up to 893 minutes.
Description
Technical field
The present invention relates to oil gas field storey increase design working solution technical fields, and in particular to a kind of heat-resistant salt-resistant type Shuangzi both sexes
The preparation method of ion viscoelastic surfactant and its in the water base clean fracturing fluid of high salinity, high salinity cleaning foam
Application in fracturing fluid.Its excellent salt tolerance makes it form vermiculate glues in highly mineralized formation brines or seawater to assign
The good viscoelastic property of fluid is given, hinterland oil field is also solved while realizing fracturing fluid Low Damage or marine oil and gas is opened
The problem of freshwater resources lack during hair.
Background technique
With the exploitation and failure of conventional gas and oil resource, a large amount of unconventional oily petroleum resources of hypotonic or Oil in Super-low Permeability are increasingly
By the concern of oil company, for the economical and efficient exploitation for realizing such petroleum resources, hydraulic fracturing becomes extremely important one
A link.In stimulation technology, hydraulic fracturing technology is one of the main measure for improving oil gas field production efficiency, and
The performance of fracturing fluid is directly related to the success or failure of hydraulic fracturing.Conventional fracturing fluid system is mostly guar gum system or polyacrylamide
Amine polymer system, the jelly system formed under the action of crosslinking agent have good heatproof endurance of cutting.However, by
Being thickened agent molecule in it has biggish molecular weight, forms residue easily in reservoir to block Rock Matrix pore throat, thus
Cause secondary injury.Therefore, the clean fracturing fluid for developing Low Damage is related work person is continually striving to always.
The clean fracturing liquid prepared by viscoelastic surfactant (Viscoelastic Surfactant, abbreviation VES)
System is self-assembly of worm shape micella by Small molecular surfactant, while three-dimensional netted knot has mutually been wound between micella
Structure embodies superior solid-carrying performance to assign fluid splendid viscoplasticity.It is water base compared to guar gum or polymeric system
Fracturing fluid, VES clean fracturing fluid embody many advantages: it is 1. simple with liquid, without crosslinking agent, fungicide etc.；2. fracturing liquid
It is low frictional resistance, pump resistance can be reduced；3. viscoplasticity is good, there is good solid-carrying performance；4. surfactant molecule amount is small, easily return
Row contacts energy self-breaking glue with hydrocarbon fluid in stratum, is not necessarily to gel breaker；5. filter cake is not formed, it is small to formation damage, therefore
Many fields and link in oil gas field volume increase are applied, and have superfine effect of increasing production.
However VES clean fracturing fluid is there are still many shortcomings, as heat resistance is poor, double tail VES molecule salt tolerances
It is poor etc..Currently, reservoir conditions are more and more harsher, while the protection of freshwater resources is also more taken seriously, and therefore, develops same
When the person that becomes related work of the Shuangzi viscoelastic surfactant with heat resistance and salt resistant character tackling key problem emphasis.Shuangzi
The solution that VES molecule is prepared is compared to routine VES molecule with stronger temperature tolerance, viscoplasticity, therefore it is as VES cleaning foam
The base fluid of working solution also has a very important significance to unconventional resource is developed.
Summary of the invention
The object of the present invention is to provide a kind of heat-resistant salt-resistant type Shuangzi amphoteric ion type containing phenyl ring and sulfobetaines
Viscoelastic surfactant and preparation method thereof and the water base clean fracturing fluid of high salinity, it is living to solve existing viscoelastic surface
The problem that heat resistance is bad, salt resistant character is poor existing for property agent.
The technical scheme to solve the above technical problems is that
A kind of heatproof containing phenyl ring and sulfobetaines, salt-resistant type Shuangzi zwitterionic viscoelastic surfactant, tool
Just like flowering structure formula:
Wherein, R is the saturated hydrocarbon chain or aliphatic unsaturated hydrocarbon of carbon atom number 17-21.
Further, in preferred embodiments of the present invention, R is the hydrophobic carbochain of erucic acid, the hydrophobic carbochain of oleic acid or hard
The hydrophobic carbochain of resin acid.
Wherein, the hydrophobic carbon-chain structure formula of erucic acid are as follows:
Wherein, the hydrophobic carbon-chain structure formula of oleic acid are as follows:
Wherein, stearic hydrophobic carbon-chain structure formula are as follows:
Wherein the hydrophobic chain containing unsaturated double-bond makes the water solubility of composite structure more preferably in above-mentioned three kinds of structures.
The molecular formula of above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant is R2C29H54N6O7S.The carbon atom of R
Number can be 17 or 21.
Heat-resistant salt-resistant type Shuangzi zwitterionic viscoelastic surfactant containing phenyl ring and sulfobetaines of the invention,
In yellow paste, density is in 0.98-0.99g/cm3Within the scope of.Due to salt-resistant type Shuangzi amphoteric ion viscoelastic of the invention
Property surfactant there is stronger surface-active, and salt tolerance is preferable, can be used as clean fracturing fluid salt-resistant type thickening agent, cleaning
The foam stabiliser of foam fracturing fluid, diversion agent, salt-resistant type emulsifier, foaming agent of self-diverting acid etc..
The preparation method of the above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant containing phenyl ring and sulfobetaines,
By N, N-methyl-p-phenylenediamine and 1,3- propyl sultone are dissolved in acetone with 1:1.05, are heated to 40 DEG C, magneton stirs 6 hours
Occur white precipitate, as reaction intermediate 1 in solution afterwards；By intermediate 1 and epoxychloropropane with 1:(2.1-2.3) it is dissolved in second
In alcohol and the mixed liquor of deionized water, the ratio of ethyl alcohol and deionized water is 1:1, is heated to 60 DEG C, and magneton stirs 8 hours, subtracts
Water, ethyl alcohol and extra epoxychloropropane is distilled off in pressure, obtains intermediate 2；By intermediate 2 and fatty acid diemethylamine with
1:2.1~1:2.3 mixing is dissolved in ethyl alcohol, 80 DEG C and condenser pipe reflux under conditions of, magneton stir 24 hours after react complete,
Rotary evaporation in vacuo device removes alcohol solvent, obtains crude product.Using mixed liquor (the volume ratio 7:2 of ethyl acetate and ethyl alcohol
~5:1) recrystallization 3~4 is carried out to crude product, finally obtain clean product.
Compared with other types amphoteric ion Gemini surface active agent, which has sun simultaneously
Ionic group, sulfobetaines base groups and benzene ring structure, the rigid structure and phenyl ring of phenyl ring while improving salt tolerance
Between binding force can increase substantially the temperature tolerance of glue bundle body, to become a kind of heat-resistant salt-resistant type clean fracturing liquid
It is thickening agent VES molecule.
The reaction process of the above method is as follows:
(1) intermediate 1 reacts
(2) intermediate 2 reacts
(3) synthesis of surfactant
Further, in preferred embodiments of the present invention, the reaction of above-mentioned intermediate 1 be by N, N-methyl-p-phenylenediamine with
1,3- propyl sultone is with the molar ratio of 1:1, using acetone as solvent, reacts 6 hours and obtains at 40 DEG C；Second step, intermediate 2
Synthesis be by intermediate 1 and epoxychloropropane with 1:(2.1-2.3) molar ratio, with the mixed liquor of deionized water and ethyl alcohol
(volume ratio 1:1) is solvent, reacts 8 hours and obtains at 60 DEG C；Third step, Shuangzi amphoteric ionic surfactant are by rouge
Fat acid amido propyl dimethylamine is with intermediate 2 with molar ratio for (2.1-2.5): 1, with the mixeding liquid volume of ethyl alcohol and deionized water
It is solvent than (1:1), heating temperature is 80 DEG C, and the reaction time obtains for 12h.
Further, in preferred embodiments of the present invention, above-mentioned fatty acid amide propyl dimethylamine is erucyl amide third
One of base dimethylamine, oleamide diemethylamine and stearic amide diemethylamine or multiple combinations.
Further, in preferred embodiments of the present invention, above-mentioned preparation method further includes purification step:
Crude product is dissolved at 50-60 DEG C with the mixed liquor (6:1-10:1) of ethyl acetate and ethyl alcohol, then by the acetic acid
Ethyl ester solution is recrystallized in 0-2 DEG C, to remove unreacted fatty acid amide propyl dimethylamine, obtains crystallized product；Pass through rotation
Turn crystallized product described in evaporation process, to remove ethyl acetate and ethyl alcohol, obtains pure Shuangzi amphoteric ion viscoelastic surface
Activating agent.
The water base clean fracturing fluid of high salinity comprising above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant 2-
5wt%, inorganic salts account for 3-15wt%, and surplus is water, that is, use ocean water or stratum of the salinity in 30000-150000mg/L
The clean fracturing fluid that output water is prepared.
Preferably, the weight ratio of salt-resistant type Shuangzi zwitterionic viscoelastic surfactant be 2wt%, 3wt% or
5wt%.
High salinity VES foam fracturing fluid, liquid phase part include above-mentioned salt-resistant type Shuangzi amphoteric ion viscoelastic surface
Activating agent 1-3wt% and 0.3-0.6wt% neopelex (SDBS), inorganic salts account for 3-15wt%, and surplus is
Water, i.e., the VES solution prepared with salinity in the ocean water or stratum output water of 30000-150000mg/L；Gas phase is nitrogen,
Foam quality (foam quality) is 70%-85%.Preferably, the weight of salt-resistant type Shuangzi zwitterionic viscoelastic surfactant
Than being 0.3wt%-0.6wt% for the weight ratio of 1wt%, 2wt% or 3wt%, SDBS.
Preferably, the salinity of concentrated water is 30000-150000mg/L.It is highly preferred that the weight ratio of counter ion salt
For 30000mg/L, 50000mg/L or 150000mg/L.Further, in preferred embodiments of the present invention, above-mentioned inorganic salts
For the mixing of potassium chloride, magnesium chloride, calcium chloride, sodium chloride, sodium sulphate, sodium bicarbonate.
The invention has the following advantages:
(1) salt-resistant type Shuangzi zwitterionic viscoelastic surfactant of the invention can reach 30000- in salinity
Vermiculate glues body is formed in the seawater or water flooding of the high salinity of 150000mg/L, and solution is made to embody good viscoelastic
Property, it can be used for configuring the water base clean fracturing fluid of seawater base or stratum, can be reduced in reducing fracturing process while reservoir damage
The utilization of freshwater resources, solves freshwater resources deficiency and highly mineralized formation brines is difficult to the problems such as handling.This is because of the invention
Shuangzi zwitterionic viscoelastic surfactant molecular structure on have betaine structure, to assign its splendid salt tolerant energy
Power.And the clean fracturing fluid of conventional viscoelastic surfactant configuration will occur mutually to separate under the salinity of 15000mg/L
Phenomenon causes system to lose viscosity, so that proppant can not be carried.Therefore, Shuangzi amphoteric ion viscoelastic surface of the invention
The resistance to salinity ability of activating agent is 10 times of conventional viscoelastic surfactant or more.In addition, due to salt-resistant type of the invention
Shuangzi zwitterionic viscoelastic surfactant contains two overlength hydrophobic chains, and hydrophilic head base contains benzene ring structure and sulphur
Base betaine structure, the high mineralization seawater base or stratum aqueous fracturing fluid prepared with it still have at high temperature (140-160 DEG C)
Good apparent viscosity is for hanging sand, and wherein the Shuangzi amphoteric ion viscoelastic surface of the hydrophobic chain containing erucyl amide of 5wt% is living
The high salinity clean fracturing fluid that property agent is prepared can be in 160 DEG C, 170s-1Under the conditions of shear 120min after, viscosity is still protected
It holds in 50mPas or more, rheological property is excellent, and does not need using addition auxiliary agent.When the clean fracturing fluid that it is prepared encounters
Broken glue occurs when formation hydrocarbon fluid, viscosity can be down to 50mPas or less.
(2) solution for the 1-3wt% for using Shuangzi zwitterionic viscoelastic surfactant of the present invention to prepare is water phase base
Liquid compounds 0.3-0.6wt% neopelex (SDBS), using nitrogen as gas phase, foam quality 70%-85%.This
The Shuangzi zwitterionic viscoelastic surfactant of invention, which compounds under high salinity with SDBS, still has good foaming characteristic, and
The vermiculate glues of formation makes air bubble liquid-membrane have good viscoplasticity, can be effectively reduced drain age velocity, the disturbance rupture of liquid film
And gas diffusion velocity, to greatly improve the stability of foam.Vermiculate glues, which mutually associates, to be formed network structure and slows down
The speed of liquid, the half-life period of very big extended VES foam is precipitated in liquid film channel.The both sexes of Shuangzi containing erucyl amide of 3wt%
Ionic surface active agent compounding 0.6wt% neopelex (SDBS) makes the nitrogen foam that foam quality is 75%
Half-life of the VES fracturing fluid at 90 DEG C can reach 893 minutes, and the stability of foam is much higher than usual foam pressure break.
Detailed description of the invention
Table 1 is the mineralogical composition of Tahe 10 area stratum output water and West Sichuan gas field stratum output water；
Fig. 1 is the salt for the hydrophobic chain viscoelastic type surfactant of erucic acid containing 3wt% prepared with 10 area stratum output water of Tahe
The rheogram of water-based clean fracturing fluid；
Fig. 2 is the salt for the hydrophobic chain viscoelastic surfactant of erucic acid containing 5wt% prepared with 10 area stratum output water of Tahe
The rheogram of water-based clean fracturing fluid；
Fig. 3 is that the salt for the hydrophobic chain viscoplasticity of erucic acid containing the 3wt% face activating agent that West Sichuan gas field stratum output water is prepared is water base
The rheogram of clean fracturing fluid；
Fig. 4 is the salt water for the hydrophobic chain viscoelastic surfactant of erucic acid containing 5wt% that West Sichuan gas field stratum output water is prepared
The rheogram of base clean fracturing fluid；
Fig. 5 is the viscoelastic surfactant containing 3wt% and 0.6wt%SDBS foam prepared with 10 area stratum output water of Tahe
The VES foam fracturing fluid bubble half-life of mass dryness fraction 75%
Fig. 6 is the viscoelastic surfactant containing 3wt% and 0.6wt%SDBS foam quality prepared with the stratum Chuan Xi output water
75% VES foam fracturing fluid bubble half-life
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.The person that is not specified actual conditions in embodiment, according to normal conditions or the item suggested of manufacturer
Part carries out.Reagents or instruments used without specified manufacturer is the conventional products that can be obtained by commercially available purchase.
Embodiment 1
The present embodiment using erucyl amide diemethylamine as Material synthesis salt-resistant type Shuangzi amphoteric ion viscoelastic surface
The method of activating agent is as follows:
N, N-methyl-p-phenylenediamine and 1,3- propyl sultone are dissolved in acetone with the molar ratio of 1:1, react 6 at 40 DEG C
Hour obtains intermediate 1；Intermediate 1 and epoxychloropropane are dissolved in the mixing of deionized water and ethyl alcohol with the molar ratio of 1:2.2
In liquid (volume ratio 1:1), is reacted 8 hours at 60 DEG C and obtain intermediate 2；By erucyl amide diemethylamine and intermediate 2 with
Molar ratio 2.2:1 is dissolved in ethyl alcohol and the mixeding liquid volume ratio (1:1) of deionized water, and heating temperature is 80 DEG C, and return stirring is anti-
12h is completed between seasonable；Solvent is removed using rotary evaporation in vacuo device and obtains crude product；Using the mixing of ethyl acetate and ethyl alcohol
Liquid (volume ratio 6:1) recrystallizes 3 times and obtains clean product.
Embodiment 2
The viscoelastic surfactant in example 1 is taken, with the salt for the 3wt% that 10 area stratum output water of Tahe in table 1 is prepared
Water-based clean fracturing fluid, at 140 DEG C, 170s-1Under, it shears 2 hours or so, apparent viscosity is still maintained at 50mPa.s or more, meets
The requirement of professional standard SY/T6376-2008, heatproof rheological curve are as shown in Figure 1.
Embodiment 3
The viscoelastic surfactant in example 1 is taken, with the salt for the 5wt% that 10 area stratum output water of Tahe in table 1 is prepared
Water-based clean fracturing fluid, at 160 DEG C, 170s-1Under, it shears 2 hours or so, apparent viscosity is still maintained at 40mPa.s or more, meets
The requirement of professional standard SY/T6376-2008, heatproof rheological curve are as shown in Figure 2.
Embodiment 4
The viscoelastic surfactant in example 1 is taken, with the salt for the 3wt% that West Sichuan gas field stratum output water in table 1 is prepared
Water-based clean fracturing fluid, at 140 DEG C, 170s-1Under, it shears 2 hours or so, apparent viscosity is still maintained at 30mPa.s or more, meets
The requirement of professional standard SY/T6376-2008, heatproof rheological curve are as shown in Figure 3.
Embodiment 5
The viscoelastic surfactant in example 1 is taken, with the salt for the 5wt% that West Sichuan gas field stratum output water in table 1 is prepared
Water-based clean fracturing fluid, at 160 DEG C, 170s-1Under, it shears 2 hours or so, apparent viscosity is still maintained at 40mPa.s or more, meets
The requirement of professional standard SY/T6376-2008, heatproof rheological curve are as shown in Figure 4.
Embodiment 6
The viscoelastic surfactant in example 1 is taken, is made with 10 area stratum output water of Tahe in table 1 containing 3wt%
The water phase of viscoelastic surfactant and 0.6wt%SDBS uses nitrogen to prepare the VES foam that foam quality is 75% for gas phase
The half-life period of fracturing fluid, foam is relatively stable at 30 DEG C to 90 DEG C, much higher than the half-life period of usual foam fracturing fluid, not equality of temperature
Half-life period under degree, test results are shown in figure 5.
Embodiment 7
The viscoelastic surfactant in example 1 is taken, is made with West Sichuan gas field stratum output water in table 1 containing 3wt%
The water phase of viscoelastic surfactant and 0.6wt%SDBS uses nitrogen to prepare the VES foam that foam quality is 75% for gas phase
The half-life period of fracturing fluid, foam is relatively stable at 30 DEG C to 90 DEG C, much higher than the half-life period of usual foam fracturing fluid, not equality of temperature
Half-life period under degree, test results are shown in figure 6.
1 China part oil gas field water flooding mineralogical composition of table
Claims (7)
1. a kind of heatproof containing phenyl ring and sulfobetaines, salt-resistant type Shuangzi zwitterionic viscoelastic surfactant, have
Following structural formula:
Wherein, R is the saturated hydrocarbon chain or aliphatic unsaturated hydrocarbon of carbon atom number 17-21.
2. the synthetic method of amphoteric ion Gemini surface active as claimed in claim 1, feature successively include with
Lower step:
(1) N, N-methyl-p-phenylenediamine and 1,3- propyl sultone are dissolved in acetone with 1:1.05, are heated to 40 DEG C, magneton stirs
Occur white precipitate, as reaction intermediate 1 after mixing 6 hours in solution；
(2) by intermediate 1 and epoxychloropropane with 1:(2.1-2.3) be dissolved in ethyl alcohol and the mixed liquor of deionized water, ethyl alcohol with
The ratio of deionized water is 1:1, is heated to 60 DEG C, and magneton stirs 8 hours, and vacuum distillation removes water, ethyl alcohol and extra epoxy
Chloropropane obtains intermediate 2；
(3) intermediate 2 is mixed with fatty acid diemethylamine with 1:2.1~1:2.3 and is dissolved in ethyl alcohol, 80 DEG C and condenser pipe time
Under conditions of stream, magneton reacts after stirring 24 hours to be completed, and rotary evaporation in vacuo device removes alcohol solvent, obtains crude product；
(4) recrystallization 3~4 is carried out to crude product using the mixed liquor (volume ratio 7:2~5:1) of ethyl acetate and ethyl alcohol, finally
Obtain clean product.
3. Shuangzi viscoelastic surfactant described in claim 1 is the water base clean fracturing fluid of high salinity of thickening agent, special
Sign is, the water base clean fracturing fluid of high salinity comprising above-mentioned salt-resistant type Shuangzi zwitterionic viscoelastic surfactant 2-
5wt%, inorganic salts account for 3-15wt%, and surplus is water, that is, use ocean water or stratum of the salinity in 30000-150000mg/L
The clean fracturing fluid that output water is prepared.
4. the preparation method that Shuangzi viscoelastic surfactant described in claim 2 is thickening agent, it is characterised in that wherein long-chain
Tertiary amine is erucyl amide propyl-dimethyl tertiary amine or oleamide propyl-dimethyl tertiary amine or hard fatty acids amido propyl dimethyl
Tertiary amine.
5. the water base cleaning clean fracturing fluid of high salinity as claimed in claim 3, which is characterized in that the mineralising of concentrated water
Degree is 30000-200000mg/L.It is highly preferred that the weight ratio of counter ion salt be 30000mg/L, 50000mg/L or
150000mg/L.Further, in preferred embodiments of the present invention, above-mentioned inorganic salts be potassium chloride, magnesium chloride, calcium chloride,
The mixing of sodium chloride, sodium sulphate, sodium bicarbonate.
6. high salinity VES foam fracturing fluid, liquid phase part includes that above-mentioned salt-resistant type Shuangzi amphoteric ion viscoelastic surface is living
Property agent 1-3wt% and 0.3-0.6wt% neopelex (SDBS), inorganic salts account for 3-15wt%, and surplus is
Water, i.e., the VES solution prepared with salinity in the ocean water or stratum output water of 30000-150000mg/L；Gas phase is nitrogen,
Foam quality (foam quality) is 70%-85%.
7. the water base cleaning clean fracturing fluid of high salinity as claimed in claim 3, which is characterized in that hydrocarbons such as crude oil,
Kerosene etc. can make it thoroughly break glue.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111039819A (en) * | 2019-12-16 | 2020-04-21 | 西南石油大学 | Temperature-resistant salt-tolerant viscoelastic surfactant and preparation method and application thereof |
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| CN113563507A (en) * | 2020-04-29 | 2021-10-29 | 中国石油天然气股份有限公司 | Anionic acrylamide polymer, calcium chloride weighted fracturing fluid containing anionic acrylamide polymer and preparation methods of anionic acrylamide polymer and calcium chloride weighted fracturing fluid |
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| CN110922956B (en) * | 2019-11-26 | 2021-10-01 | 陕西科技大学 | Unsaturated long-chain-table active agent fracturing fluid and preparation and gel breaking methods thereof |
| CN110922956A (en) * | 2019-11-26 | 2020-03-27 | 陕西科技大学 | Unsaturated long-chain-table active agent fracturing fluid and preparation and gel breaking methods thereof |
| CN111039819A (en) * | 2019-12-16 | 2020-04-21 | 西南石油大学 | Temperature-resistant salt-tolerant viscoelastic surfactant and preparation method and application thereof |
| CN113563507B (en) * | 2020-04-29 | 2023-04-07 | 中国石油天然气股份有限公司 | Anionic acrylamide polymer, calcium chloride weighted fracturing fluid containing anionic acrylamide polymer and preparation methods of anionic acrylamide polymer and calcium chloride weighted fracturing fluid |
| CN113563507A (en) * | 2020-04-29 | 2021-10-29 | 中国石油天然气股份有限公司 | Anionic acrylamide polymer, calcium chloride weighted fracturing fluid containing anionic acrylamide polymer and preparation methods of anionic acrylamide polymer and calcium chloride weighted fracturing fluid |
| CN111471447B (en) * | 2020-05-28 | 2022-05-24 | 北京九恒质信能源技术有限公司 | Amphoteric gemini surfactant, temperature-resistant salt-resistant nano emulsion, and preparation method and application thereof |
| CN111471447A (en) * | 2020-05-28 | 2020-07-31 | 北京九恒质信能源技术有限公司 | Amphoteric gemini surfactant, temperature-resistant salt-resistant nano emulsion, and preparation method and application thereof |
| US11236264B2 (en) | 2020-06-08 | 2022-02-01 | Saudi Arabian Oil Company | Methods and compositions using a combination of zwitterionic surfactants and gemini surfactants as diversion agents |
| CN114805115A (en) * | 2022-04-26 | 2022-07-29 | 四川零碳智慧科技有限公司 | Temperature-resistant type dihydroxyl cationic viscoelastic surfactant, preparation method thereof, fracturing fluid and application thereof |
| CN114805115B (en) * | 2022-04-26 | 2024-06-18 | 四川零碳智慧科技有限公司 | Temperature-resistant dihydroxy cation viscoelastic surfactant, preparation method thereof, fracturing fluid and application thereof |
| CN114835601A (en) * | 2022-05-20 | 2022-08-02 | 西南石油大学 | Multifunctional surfactant fracturing fluid thickening agent with oil displacement function and preparation method thereof |
| CN114835601B (en) * | 2022-05-20 | 2023-09-22 | 西南石油大学 | Multifunctional surfactant fracturing fluid thickening agent with oil displacement function and preparation method thereof |
| US12071838B2 (en) | 2022-10-07 | 2024-08-27 | Saudi Arabian Oil Company | Viscoelastic surfactants for acid diversion in downhole operations |
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| CN115960021A (en) * | 2023-02-09 | 2023-04-14 | 胜利油田物华化工厂 | Thickened oil viscosity reducer for improving crude oil recovery efficiency and synthesis method thereof |
| CN115960021B (en) * | 2023-02-09 | 2023-10-20 | 胜利油田物华化工厂 | Thickened oil viscosity reducer for improving crude oil recovery ratio and synthesis method thereof |
| CN116693429A (en) * | 2023-03-29 | 2023-09-05 | 重庆市泓择石油科技有限公司 | Variable viscosity amphiphilic structure type fracturing fluid thickener and preparation method and application thereof |
| CN116693429B (en) * | 2023-03-29 | 2024-01-26 | 重庆市泓择石油科技有限公司 | Variable viscosity amphiphilic structure type fracturing fluid thickener and preparation method and application thereof |
| CN116396742B (en) * | 2023-06-07 | 2023-08-29 | 广饶六合化工有限公司 | Thickening agent for clean fracturing fluid and preparation method thereof |
| CN116396742A (en) * | 2023-06-07 | 2023-07-07 | 广饶六合化工有限公司 | Thickening agent for clean fracturing fluid and preparation method thereof |
| CN116478332B (en) * | 2023-06-20 | 2023-09-15 | 东营江源化工有限公司 | Preparation method and application of polymer thickening agent for slickwater fracturing fluid |
| CN116478332A (en) * | 2023-06-20 | 2023-07-25 | 东营江源化工有限公司 | Preparation method and application of polymer thickening agent for slickwater fracturing fluid |
| CN117164472A (en) * | 2023-08-16 | 2023-12-05 | 碳中能源科技(北京)有限公司 | Viscoelastic amphoteric surfactant and high-temperature-resistant fracturing fluid prepared from viscoelastic amphoteric surfactant |
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