CN107236532A - A kind of New Clear Fracturing Fluid and preparation method thereof - Google Patents
A kind of New Clear Fracturing Fluid and preparation method thereof Download PDFInfo
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- C09K8/86—Compositions based on water or polar solvents containing organic compounds
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Abstract
The invention belongs to technical field of petroleum extraction, more particularly it relates to a kind of clean fracturing fluid and preparation method thereof.The invention provides a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least including 0.1~0.5 part of association type polymer thickening agent；0.1~0.7 part of surfactant；0.3~0.8 part of crosslinking agent；0.2~0.6 part of cellulose；0.001~0.05 part of capsule breaker；100 parts of water；The association type polymer thickening agent is polymerize in aqueous by acrylates, acrylamide, quaternary ammonium salt, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six by initiator to be obtained.
Description
Technical field
The invention belongs to technical field of petroleum extraction, more particularly it relates to a kind of New Clear Fracturing Fluid and its
Preparation method.
Background technology
Application of the hydraulic fracturing technology in oil field starts from eighties of last century forties, by the development in nearly more than 70 year, progressively into
One of important well stimulation to improve Oil ＆ Gas Productivity and oil recovery.Hydraulic fracturing is exactly to utilize ground high-tension apparatus,
By pit shaft be injected more than formation absorption ability have the more full-bodied stratum taken sand fracturing fluid, near wellbore zone is improved with this
Pressure, one or more will be produced when strata pressure exceedes fracture pressure has the crack of certain flow conductivity, so as to reach
To the purpose of oil-water well increasing yield and injection.The outstanding feature of China's petroleum resources is that Low permeable oil and gas reservoirs are distributed wide, reserves greatly, objective
On determine that hydraulic fracturing is to realize that China oilfield stable production increases production the preferred measure of target.
The quality of fracturing fluid property is related to the success or failure of pressing crack construction, therefore all the performance of raising fracturing fluid is made both at home and abroad
For research emphasis.Fracturing fluid has transmission pressure, makes the effect for stitching and taking sand, purifying crack, and preferable fracturing fluid should possess height
Viscosity, low leak-off, rheological characteristic are good, heat endurance and shear stability are good, compatibility is good, fragile glue returns row, injure small and valency
The performance such as lattice are cheap.At home and abroad oil field is used widely and obtains the aqueous fracturing fluid of good effect of increasing production and can divide at present
For 3 types：(1) natural and synthesis plant gum fracturing fluid；(2) cellulose fracturing fluid；(3) polymer fracturing fluid.
The thickening agent relative molecular mass of above-mentioned several systems is excessive, therefore dissolubility is poor, water-insoluble is more, easily formed
" flake ", greatly reduces the utilization rate of thickening agent, and scene can only make up loss by improving thickening agent dosage；In addition, on
State in three kinds of fracturing liquid rubber-breaking liquid containing can largely reduce the residue of in-place permeability, have a strong impact on fracturing effect.
Schlumberger in 1997 using Surfactant Used in Viscoelastic Fracturing Fluids (VES) develop it is a kind of to stratum fanout free region without dirt
The fracturing fluid of dye, also known as clean fracturing fluid.Clean fracturing fluid is simple with liquid, it is not necessary to crosslinking agent and other chemical addition agents；
Flow frictional resistance small, only the 25%~40% of clear water, construction safety is simple；Without water-insoluble during with liquid, after breaking gel without residue, return
Row leads height, therefore without formation damage and can keep fracture condudtiviy, good fracturing effect can be obtained, so that by people's
Extensive concern, and started in worldwide the upsurge of clean fracturing fluid research and application.
Thus, very develop a new New Clear Fracturing Fluid as desired by research and development.
The content of the invention
In order to solve the above-mentioned technical problem, one side of the invention provides a kind of New Clear Fracturing Fluid, described
New Clear Fracturing Fluid, in parts by weight, at least includes
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
As a kind of preferred technical scheme of the present invention, in the association type polymer thickening agent, acrylates, acryloyl
Weight ratio between amine, quaternary ammonium salt, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six is：10：(10~
30)：20：12：5.
As a kind of preferred technical scheme of the present invention, described surfactant is selected from：Cationic surface active agent,
Any one in anionic surfactant, nonionic surfactant, Gemini surface active agent, biosurfactant
Or several combinations.
As a kind of preferred technical scheme of the present invention, described crosslinking agent is selected from：Boric acid, Boratex, organic boron crosslinking
Any one or a few combination in agent, organic boron zirconium cross linking agent.
As a kind of preferred technical scheme of the present invention, described cellulose is selected from：Carboxymethyl cellulose, hydroxypropyl methyl
Any one or a few combination in cellulose, carboxymethyl hydroxyethyl cellulose, carboxymethyl hydroxypropyl cellulose.
As a kind of preferred technical scheme of the present invention, described cellulose is modified cellulose, described modified fibre
Element is neopelex modified cellulose.
As a kind of preferred technical scheme of the present invention, in described modified cellulose, the neopelex
In modified cellulose, the weight ratio between neopelex and cellulose is：1：5.
As a kind of preferred technical scheme of the present invention, described capsule breaker is potassium peroxydisulfate, ammonium persulfate, chlorine
Imitative, hexadecyltrimethylammonium chloride, Macrogol 600, cyclodextrin are mixing core, with EMA, chitosan,
Polyethylene glycol, VTES, vinyl acetate, n-butanol are mixing peel.
As a kind of preferred technical scheme of the present invention, the preparation method of described capsule breaker, including following step
Suddenly：
(1) potassium sulfate, ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600 are uniformly mixed, obtained
To the first mixed liquor；
(2) by EMA, chitosan, polyethylene glycol, VTES, vinyl acetate, positive fourth
Alcohol is uniformly mixed, and obtains the second mixed liquor；
(3) the second mixed liquor in step (2) is added in the first mixed liquor, reaction temperature is risen into 60 DEG C of stirrings
Under, 3~5h of stirring reaction washs 3 times through ethanol, dried, produces microcapsule degelling agent.
The second aspect of the invention provides the preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
With reference to above and other feature, aspect and the advantage described further below that the present invention is more readily understood.
Embodiment
The participation in the election detailed description of the invention below for being preferable to carry out method and including embodiment this hair can be more easily understood
Bright content.Unless otherwise defined, all technologies used herein and scientific terminology have common with art of the present invention
The identical implication that technical staff is generally understood that.When there is contradiction, the definition in this specification is defined.
As used herein term " by ... prepare " it is synonymous with "comprising".Term "comprising" used herein, " comprising ",
" having ", " containing " or its any other deformation, it is intended that cover including for non-exclusionism.For example, the combination comprising listed elements
Thing, step, method, product or device are not necessarily limited to those key elements, but can include not expressly listed other key elements or
Such a composition, step, method, product or the intrinsic key element of device.
Conjunction " Consists of " excludes any key element do not pointed out, step or component.If be used in claim, this
Phrase will make claim be closed, it is not included the material in addition to materials of those descriptions, but relative normal
Except rule impurity.When being rather than immediately following in the clause that phrase " Consists of " appears in claim main body after theme,
It is only limited to the key element described in the clause；Other key elements are not excluded outside as the overall claim.
Equivalent, concentration or other values or parameter are excellent with scope, preferred scope or a series of upper limit preferred values and lower limit
During the Range Representation that choosing value is limited, this, which is appreciated that, specifically discloses by any range limit or preferred value and any scope
All scopes that any pairing of lower limit or preferred value is formed, regardless of whether whether the scope separately discloses.For example, when open
During scope " 1 to 5 ", described scope should be interpreted as including scope " 1 to 4 ", " 1 to 3 ", " 1 to 2 ", " 1 to 2 and 4 to
5 ", " 1 to 3 and 5 " etc..When number range is described herein, unless otherwise indicated, otherwise the scope is intended to include its end
Value and all integers and fraction within the range.
Singulative includes plural number and object is discussed, unless the context clearly dictates otherwise." optional " or it is " any
It is a kind of " refer to that the item or event that describe thereafter may or may not occur, and the description include situation that event occurs and
The situation that event does not occur.
Approximate term in specification and claims is used for modifying quantity, represents that the present invention is not limited to this specific
Quantity, includes the part of the amendment of the acceptable change without cause related basic function close to the quantity.Phase
Answer, modify a numerical value with " about ", " about " etc., mean that the invention is not restricted to the exact numerical.In some examples, approximately
Term likely corresponds to the precision of the instrument of measured value.In present specification and claims, scope is limited can be with
Combine and/or exchange, these scopes include all subranges contained therebetween if not stated otherwise.
In addition, the indefinite article " one kind " and " one " before key element of the present invention or component are to key element or the quantitative requirement of component
(i.e. occurrence number) unrestriction.Therefore " one " or " one kind " should be read as including one or at least one, and odd number
The key element or component of form also include plural form, unless the obvious purport of the quantity refers to singulative.
In order to solve the above-mentioned technical problem, one side of the invention provides a kind of New Clear Fracturing Fluid, described
New Clear Fracturing Fluid, in parts by weight, at least includes
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
Association type polymer thickening agent
In the application, " the association type polymer thickening agent " is by acrylates, acrylamide, quaternary ammonium salt, methyl-prop
Olefin(e) acid trifluoro ethyl ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
What described acrylates can be enumerated has：PAA, calcium acrylate, Magnesium Acrylate Prepared etc.；Most preferably propylene
Sour sodium.
What described quaternary ammonium salt can be enumerated has：Acrylyl oxy-ethyl-trimethyl salmiac, methylacryoyloxyethyl three
Ammonio methacrylate, acrylyl oxy-ethyl-trimethyl ammonium bromide, methylacryoyloxyethyl trimethylammonium bromide, dimethyl
Base allyl ammonium chloride, dodecyl dimethyl allylic bromination ammonium, dodecyldimethylamine base allyl ammonium chloride, myristyl
Dimethyl-allyl ammonium bromide, hexadecyldimethyl benzyl ammonium allyl ammonium chloride, hexadecyldimethyl benzyl ammonium allylic bromination ammonium, 18
Alkyl dimethyl allyl ammonium chloride, octadecyldimethyl allylic bromination ammonium etc.；Most preferably acrylyl oxy-ethyl front three
Ammonium chloride.
The trifluoroethyl methacrylate is purchased from Weihai Newera Chemical Co., Ltd..
The acrylate of aliphatic polyurethane six is purchased from Guangzhou Li Hou trade Co., Ltds, and the trade mark of product is：
RJ424。
In a preferred embodiment, the specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
Surfactant
In the application, described surfactant can be：Cationic surface active agent, anionic surface activity
Agent, nonionic surfactant, Gemini surface active agent, biosurfactant etc..
What described cationic surface active agent can be enumerated has：DTAC, cetyl three
Ammonio methacrylate, OTAC, two cocoyl alkyl dimethyl ammonium chlorides etc.；
What described anionic surfactant can be enumerated has：Neopelex, dodecyl alcohol polyoxy
Ethene ether sodium sulfate, ammonium lauryl sulfate, dodecyl phosphide ester triethanolamine, lauryl sodium sulfate etc..
What described nonionic surfactant can be enumerated has：Polyoxyethylenealkylphenol ether, anhydro sorbitol three are hard
Resin acid ester, sucrose fatty ester, lauryl glucosyl etc..
What described Gemini surface active agent can be enumerated has：Trimethylene base double (octadecyldimethyl ammonium chloride), hydroxypropyls
Support double (oleamide propyl-dimethyl quaternary amines) etc..
What described biosurfactant can be enumerated has：Sophorolipid, rhamnolipid etc..
Crosslinking agent
In the application, described crosslinking agent is selected from：In boric acid, Boratex, organic borate cross-linker, organic boron zirconium cross linking agent
Any one or a few combination.
Cellulose
In the application, described cellulose is selected from：Carboxymethyl cellulose, hydroxypropyl methyl cellulose, carboxy methyl hydroxyethyl
Any one or a few in cellulose and carboxymethyl hydroxypropyl cellulose.
In a preferred embodiment, described cellulose is modified cellulose, and described modified cellulose is ten
Dialkyl benzene sulfonic acids sodium modified cellulose.
In a preferred embodiment, in described modified cellulose, the neopelex is modified fine
In dimension element, the weight ratio between neopelex and cellulose is：1：5.
In a preferred embodiment, the preparation method of the modified cellulose is：
Neopelex is dissolved in mass fraction in 80% ethanol solution, to add carboxymethyl cellulose, will
Reaction temperature, which is warming up at 80 DEG C, reacts after 3~10h, is down to room temperature, pours into acetone, fully after washing, filters and in vacuum
Dried 10 hours at 120 DEG C in baking oven, obtain modified cellulose.
Capsule breaker
In the application, the capsule breaker be potassium peroxydisulfate, ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride,
Macrogol 600, cyclodextrin are mixing core, with EMA, chitosan, polyethylene glycol 400, the ethoxy of vinyl three
Base silane, vinyl acetate, n-butanol are mixing peel.
In a preferred embodiment, the preparation method of described capsule breaker：
(1) potassium sulfate, ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600 are uniformly mixed, obtained
To the first mixed liquor；
(2) by EMA, chitosan, polyethylene glycol 400, VTES, vinyl acetate, just
Butanol is uniformly mixed, and obtains the second mixed liquor；
(3) the second mixed liquor in step (2) is added in the first mixed liquor, reaction temperature is risen into 60 DEG C of stirrings
Under, 3~5h of stirring reaction washs 3 times through ethanol, dried, produces microcapsule degelling agent.
In a preferred embodiment, the potassium sulfate, ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride,
Weight ratio between Macrogol 600 is：5：2：10：1：5.
In a preferred embodiment, the EMA, chitosan, polyethylene glycol 400, vinyl three
Weight ratio between Ethoxysilane, vinyl acetate, n-butanol is：8：5：10：4：3：8.
The second aspect of the invention provides the preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
The present invention is specifically described below by embodiment.It is necessarily pointed out that, following examples are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some the nonessential modifications and adaptations made according to the content of the invention described above, still fall within protection scope of the present invention.
In addition, if without other explanations, raw materials used is all commercially available.
Embodiment 1
Embodiment 1 provide a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least
Including
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
The specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
The surfactant is that trimethylene base is double (octadecyldimethyl ammonium chloride)；
The crosslinking agent is Boratex；
The cellulose is carboxymethyl cellulose；
The capsule breaker is that product grade is BSA-405, is purchased from the big Order of stone (Kaifeng) Science and Technology Ltd.；
The preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
Embodiment 2
Embodiment 2 provide a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least
Including
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
The specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
The surfactant is that trimethylene base is double (octadecyldimethyl ammonium chloride)；
The crosslinking agent is Boratex；
The cellulose is carboxymethyl cellulose；
The capsule breaker is that product grade is BSA-405, is purchased from the big Order of stone (Kaifeng) Science and Technology Ltd.；
The preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
Embodiment 3
Embodiment 3 provide a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least
Including
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
The specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
The surfactant is that trimethylene base is double (octadecyldimethyl ammonium chloride)；
The crosslinking agent is Boratex；
The cellulose is carboxymethyl cellulose；
The capsule breaker is that product grade is BSA-405, is purchased from the big Order of stone (Kaifeng) Science and Technology Ltd.；
The preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
Embodiment 4
Embodiment 4 provide a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least
Including
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
The specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
The surfactant is that trimethylene base is double (octadecyldimethyl ammonium chloride)；
The crosslinking agent is Boratex；
The cellulose is neopelex modified cellulose；
In a preferred embodiment, the preparation method of described neopelex modified cellulose is：
Neopelex is dissolved in mass fraction in 80% ethanol solution, carboxymethyl cellulose to be added, by reaction temperature
It is warming up at 80 DEG C and reacts after 5h, be down to room temperature, pour into acetone, fully after washing, filters and in vacuum drying oven at 120 DEG C
Dry 10 hours, obtain modified cellulose.Wherein, the weight ratio between neopelex and cellulose is：1：5.
The capsule breaker is that product grade is BSA-405, is purchased from the big Order of stone (Kaifeng) Science and Technology Ltd.；
The preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
Embodiment 5
Embodiment 5 provide a kind of New Clear Fracturing Fluid, described New Clear Fracturing Fluid, in parts by weight, at least
Including
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, methacrylic acid trifluoro second
Ester, the acrylate of aliphatic polyurethane six polymerize what is obtained in aqueous by initiator.
The specific preparation method of the association type polymer thickening agent is：
First added in 1000ml beaker and PAA, acrylamide, acryloyl are sequentially added under 500ml water, stirring
Oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six, wherein, PAA, third
Between acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
Weight ratio be：10：20：20：12：5；After monomer is completely dissolved, then it is separately added into the ammonium persulfate of monomer total amount 5/10000ths
And sodium hydrogensulfite, add 2 ‰ dimethylamino butyronitrile, start polymerization, reaction 2 hours after, obtain reactive polymeric product, 90
Hydrolyzed 4 hours under the conditions of DEG C, be cut into 3mm particles, it is standby after 85 DEG C of drying, crushing.
The surfactant is that trimethylene base is double (octadecyldimethyl ammonium chloride)；
The crosslinking agent is Boratex；
The cellulose is neopelex modified cellulose；
In a preferred embodiment, the preparation method of described neopelex modified cellulose is：
Neopelex is dissolved in mass fraction in 80% ethanol solution, carboxymethyl cellulose to be added, by reaction temperature
It is warming up at 80 DEG C and reacts after 5h, be down to room temperature, pour into acetone, fully after washing, filters and in vacuum drying oven at 120 DEG C
Dry 10 hours, obtain modified cellulose.Wherein, the weight ratio between neopelex and cellulose is：1：5.
The capsule breaker is that product grade is BSA-405, is purchased from the big Order of stone (Kaifeng) Science and Technology Ltd.；
The preparation method of New Clear Fracturing Fluid, at least comprises the following steps：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, is stirred
Afterwards, New Clear Fracturing Fluid is obtained；
(2) crosslinking is sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1)
Agent, capsule breaker, obtain the New Clear Fracturing Fluid of frozen glue shape.
Comparative example 1
Comparative example 1 is same as Example 5, and difference is, the preparing raw material of association type polymer thickening agent is replaced with
PAA, acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, the acrylate of aliphatic polyurethane six.
Comparative example 2
Comparative example 2 is same as Example 5, and difference is, the preparing raw material of association type polymer thickening agent is replaced with
PAA, acrylamide, acrylyl oxy-ethyl-trimethyl salmiac, trifluoroethyl methacrylate.
Comparative example 3
Comparative example 3 is same as Example 5, and difference is, the preparing raw material of association type polymer thickening agent is replaced with
PAA, acrylamide, acrylyl oxy-ethyl-trimethyl salmiac.
Comparative example 4
Comparative example 4 is same as Example 5, and difference is, is added without cellulose.
Comparative example 5
Comparative example 5 is same as Example 5, and difference is, is added without capsule breaker.
Comparative example 6
Comparative example 6 is same as Example 5, and difference is, it is potassium peroxydisulfate, persulfuric acid that capsule breaker, which is replaced with,
Ammonium, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600 are mixing core, with EMA, chitosan, are gathered
Ethylene glycol 400, VTES, vinyl acetate, n-butanol are mixing peel.
Comparative example 7
Comparative example 7 is same as Example 5, and difference is, it is potassium peroxydisulfate, persulfuric acid that capsule breaker, which is replaced with,
Ammonium, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600, cyclodextrin are mixing core, with EMA, are gathered
Ethylene glycol 400, VTES, vinyl acetate, n-butanol are mixing peel.
The outward appearance of the product of embodiment 1~5 and comparative example 1~7 is colourless viscous liquid, and its technical standard is used
SY/T6376-2008《Fracturing fluid general technical specifications》In table 4 (viscoplasticity surfactant fracturing fluid general technology index), SY/
5107-2005《Aqueous fracturing fluid method of evaluating performance》.
The test result of table 1
New Clear Fracturing Fluid in the application has the advantages that no residue content, gel breaking capacity be good, solid-carrying performance is good, this
Outside, New Clear Fracturing Fluid has repeatable utilization, reduces operation pressure, and huge discharge can be achieved；Embodiments herein 1~
5 are applicable to the construction of 0~200 DEG C of formation temperature；The construction of high temperature and low temperature can be applied to simultaneously.
Foregoing example is merely illustrative, some features of the feature for explaining the disclosure.Appended claim
The scope as wide as possible for requiring to be contemplated that is intended to, and embodiments as presented herein is only according to all possible embodiment
Combination selection embodiment explanation.Therefore, the purpose of applicant is appended claim not by the explanation present invention
Feature example selectional restriction.And the progress in science and technology by formed language performance it is inaccurate due to and not
The possible equivalent or son being presently considered are replaced, and these changes should also be interpreted by appended in the conceived case
Claim is covered.
Claims (10)
1. a kind of New Clear Fracturing Fluid, it is characterised in that described New Clear Fracturing Fluid, in parts by weight, at least includes
The association type polymer thickening agent is by acrylates, acrylamide, quaternary ammonium salt, trifluoroethyl methacrylate, fat
The acrylate of fat adoption urethane six polymerize what is obtained in aqueous by initiator.
2. New Clear Fracturing Fluid as claimed in claim 1, it is characterised in that in the association type polymer thickening agent, third
Weight ratio between olefin(e) acid salt, acrylamide, quaternary ammonium salt, trifluoroethyl methacrylate, the acrylate of aliphatic polyurethane six
For：10：(10~30)：20：12：5.
3. New Clear Fracturing Fluid as claimed in claim 1, it is characterised in that described surfactant is selected from：Cation
Type surfactant, anionic surfactant, nonionic surfactant, Gemini surface active agent, Bio-surface active
Any one or a few combination in agent.
4. New Clear Fracturing Fluid as claimed in claim 1, it is characterised in that described crosslinking agent is selected from：Boric acid, boric acid
Any one or a few combination in sodium, organic borate cross-linker, organic boron zirconium cross linking agent.
5. New Clear Fracturing Fluid as claimed in claim 1, it is characterised in that described cellulose is selected from：Carboxymethyl cellulose
In element, hydroxypropyl methyl cellulose, carboxymethyl hydroxyethyl cellulose, carboxymethyl hydroxypropyl cellulose any one or a few
Combination.
6. New Clear Fracturing Fluid as claimed in claim 5, it is characterised in that described cellulose is modified cellulose, institute
The modified cellulose stated is neopelex modified cellulose.
7. New Clear Fracturing Fluid as claimed in claim 6, it is characterised in that in described modified cellulose, described 12
In sodium alkyl benzene sulfonate modified cellulose, the weight ratio between neopelex and cellulose is：1：5.
8. New Clear Fracturing Fluid as claimed in claim 1, it is characterised in that described capsule breaker be potassium peroxydisulfate,
Ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600, cyclodextrin are mixing core, with methacrylic acid
Ethyl ester, chitosan, polyethylene glycol, VTES, vinyl acetate, n-butanol are mixing peel.
9. New Clear Fracturing Fluid as claimed in claim 8, it is characterised in that the preparation method of described capsule breaker,
Including the steps：
(1) potassium sulfate, ammonium persulfate, chloroform, hexadecyltrimethylammonium chloride, Macrogol 600 are uniformly mixed, obtains
One mixed liquor；
(2) it is EMA, chitosan, polyethylene glycol, VTES, vinyl acetate, n-butanol is equal
Even mixing, obtains the second mixed liquor；
(3) the second mixed liquor in step (2) is added in the first mixed liquor, reaction temperature is risen under 60 DEG C of stirrings, stirred
3~5h of reaction is mixed, 3 times is washed through ethanol, dries, produce microcapsule degelling agent.
10. the preparation method of the New Clear Fracturing Fluid as described in claim 1~9, it is characterised in that at least including following step
Suddenly：
(1) association type polymer thickening agent, cellulose, surfactant are added into water, after stirring, after stirring,
Obtain New Clear Fracturing Fluid；
(2) sequentially added during fracturing work, then in the New Clear Fracturing Fluid obtained into step (1) crosslinking agent,
Capsule breaker, obtains the New Clear Fracturing Fluid of frozen glue shape.
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