CN104046349B - A kind of aqueous fracturing fluid and preparation method thereof - Google Patents
A kind of aqueous fracturing fluid and preparation method thereof Download PDFInfo
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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
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- C09K8/62—Compositions for forming crevices or fractures
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- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
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- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
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Abstract
The present invention relates to a kind of aqueous fracturing fluid and preparation method thereof, the aqueous fracturing fluid includes 0.5 1.5wt% sodium alginates, 0.5~1.5wt% modified celluloses, 0.5~0.15wt% crosslinking agents, 0.2~0.6wt% gel breakers and water；The water-based fracturing liquid and preparation method thereof includes：（1）Sodium alginate or sodium alginate and anti-clayswelling agent or sodium alginate, anti-clayswelling agent and cleanup additive is soluble in water, it is well mixed, obtains viscous water；（2）Crosslinking agent is soluble in water, it is well mixed, obtains cross-linking agent aqueous solution；（3）By the step（2）In cross-linking agent aqueous solution be slowly added to described in step（1）In viscous water in, obtain frozen glue solution；（4）The modified cellulose is added in above-mentioned frozen glue solution, the gel breaker is eventually adding and obtains aqueous fracturing fluid.Aqueous fracturing fluid prepared by the present invention has the advantages of low cost, prop-carrying capacity are strong and residue content is few.
Description
Technical field
The present invention relates to a kind of aqueous fracturing fluid and preparation method thereof, belong to field of oilfield chemistry.
Background technology
With the increase of China's exploitation of oil-gas field difficulty, hypotonic extra-low permeability oil gas field and unconventional gas reservoir increasingly by
Pay attention to, the oil-gas reservoir of these types requires also more and more higher, therefore fracturing fluid technology has to fracturing fluid property used in pressure break
Develop on a large scale very much.
Up to the present, fracturing fluid can be divided into：Aqueous fracturing fluid, oil base fracturing fluid, emulsus fracturing fluid, foam fracturing fluid and
Acid-base fracturing fluid etc., wherein, most commonly aqueous fracturing fluid, it has the advantages that high viscosity, low frictional resistance, outstanding grittiness are good.And
Aqueous fracturing fluid can be divided into natural plants fracturing fluid, modified cellulose fracturing fluid and synthetic polymer hydrofracturing fluid again.For day
For right plant gum fracturing fluid, its main gelatinizing agent is guanidine that glue and its derivative, however as the rise in price of your glue of guanidine, is made
It is able to guanidine that glue and its derivative sharply increases for the fracturing fluid cost of gelatinizing agent.And modified cellulose is relative to rapid rise of price
For your glue of guanidine, it has cheap advantage, therefore is more and more paid attention to.
Such as, Chinese patent CN102040996 discloses a kind of fracturing fluid using carboxymethyl cellulose as gelatinizing agent, the pressure
Liquid is split mainly by 10~35wt% carboxymethyl cellulose, 10~25wt% glyoxal, 10~15wt% chromium sulfate, 3~8wt%
Acrylamide and surplus water composition.Fracturing fluid in above-mentioned technology uses plastic of the carboxymethyl cellulose as fracturing fluid
Agent, solve the problems, such as gelatinizing agent to prepare price caused by fracturing fluid using guanidine glue in the prior art high.It is but above-mentioned
Fracturing fluid in technology, because carboxymethyl cellulose is added as gelatinizing agent, so its content to be up to 10~
35wt%, residue content is more after the dosage conference of carboxymethyl cellulose causes fracturing liquid rubber-breaking, and residue content is more, and it is to stratum
Infringement it is bigger.
The content of the invention
The technical problems to be solved by the invention are that the fracturing fluid in the prior art using carboxymethyl cellulose as gelatinizing agent is deposited
Gelatinizing agent agent dosage is big, residue content is high after breaking gel the problem of, and then provides and a kind of prepare simple, inexpensive alginic acid
Sodium-carboxymethyl cellulose aqueous fracturing fluid.
In order to solve the above-mentioned technical problem, the present invention provides a kind of aqueous fracturing fluid, including gelatinizing agent, thickener, crosslinking
Agent, gel breaker and water, the gelatinizing agent is sodium alginate, the thickener is modified cellulose；Wherein, with aqueous fracturing fluid
Quality meter, the addition of the sodium alginate is 0.5~5.0wt%, and the addition of the modified cellulose is 0.5~3.0wt%,
The crosslinking agent is 1 with the sodium alginate addition ratio:10, the content of the gel breaker is 0.2~0.6wt%, and surplus is
Water.
In terms of the quality of aqueous fracturing fluid, the content of the sodium alginate is 0.5~1.5wt%, the modified cellulose
Content is 0.5~1.5wt%, and the crosslinking agent is 1 with the sodium alginate addition:10, the content of the gel breaker is 0.2
~0.6%, surplus is water.
The modified cellulose is carboxymethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl hydroxyethyl cellulose and carboxylic
Any one or a few in methylhydroxypropylcellulose.
The gel breaker is any one in ammonium persulfate, sodium peroxydisulfate and potassium peroxydisulfate.
The crosslinking agent is any one in boron triethyl, borax, potassium borate or boric acid.
The aqueous fracturing fluid, in addition to anti-clayswelling agent；Wherein, the anti-clayswelling agent be potassium chloride, ammonium chloride or
Any one in aluminium chloride；The anti-clayswelling agent content accounts for 1~5wt% of the aqueous fracturing fluid quality.
The aqueous fracturing fluid, in addition to cleanup additive；Wherein, the cleanup additive is anion surfactant；It is described to help
The content of row's agent accounts for the 0.1~0.5% of the aqueous fracturing fluid quality.
The sodium alginate is the sodium alginate after filtering or centrifugal treating.
Present invention also offers a kind of preparation method of the aqueous fracturing fluid, comprise the following steps：
（1）Sodium alginate or sodium alginate and anti-clayswelling agent or sodium alginate, anti-clayswelling agent and cleanup additive are dissolved in
In water, it is well mixed, obtains viscous water；
（2）Crosslinking agent is soluble in water, it is well mixed, obtains cross-linking agent aqueous solution；
（3）By the step（2）In cross-linking agent aqueous solution be slowly added to described in step（1）In viscous water in, obtain
Sol solution；
（4）The modified cellulose is added into above-mentioned frozen glue solution, be eventually adding the gel breaker obtain it is water base
Fracturing fluid.
The present invention has the following advantages that compared with prior art：
（1）Aqueous fracturing fluid of the present invention, using the sodium alginate of low molecule amount as gelatinizing agent, using modified cellulose as increasing
Stick, under conditions of specific addition, the sodium alginate crosslinks reaction with the crosslinking agent, and formation has space networks
The material of lattice structure, while crossed in cross-linking reaction in title, modified cellulose is wrapped in volume space lattice after sodium alginate cross-linking
It is interior so that the viscosity and prop-carrying capacity of the fracturing fluid greatly increase, and have the advantages of prop-carrying capacity is strong.In the present invention, due to changing
Property cellulose be to be made an addition to as thickener in fracturing fluid system, its does not crosslink reaction, its addition is only
0.5-3wt%, the broken glue of the fracturing fluid can't be had an impact.In addition, the gelatinizing agent sea in aqueous fracturing fluid of the present invention
Mosanom has the characteristics of molecular weight is relatively low, and molecular weight is low is easy to brokenly glue and residue content is also low after breaking gel, above-mentioned comprehensive
Cooperation is with causing the aqueous fracturing fluid to have fragile glue, and the advantages of residue content after breaking gel is low.
（2）Aqueous fracturing fluid of the present invention, the content for further controlling the sodium alginate are 0.5~1.5wt%, institute
The content for stating modified cellulose is 0.5~1.5wt%, and the crosslinking agent is 1 with the sodium alginate addition ratio:10, it is described broken
The content of jelly is 0.2~0.6wt%, and surplus is water, under the conditions of mixture ratios of above-mentioned specified quantitative, the water-based fracturing that is prepared
Liquid has excellent prop-carrying capacity and residue content is relatively low after breaking gel, and residue content is only 1~4wt%, while also causes described
The cost of aqueous fracturing fluid is significantly relatively low.Further, the present invention is by selecting filtered or centrifugal treating sodium alginate to do
For gelatinizing agent, to improve the purity of sodium alginate, the impurity content of sodium alginate is reduced, so as to further reduce fracturing liquid rubber-breaking
Residue content afterwards, improve fracturing effect.
（3）The preparation method of aqueous fracturing fluid of the present invention, by sodium alginate fracturing fluid system after cross-linking
Thickener is added, so as to avoid the possibility that thickener participates in cross-linking reaction, can so ensure the thickener in the water
Only play a part of thickening in base fracturing fluid system, can avoid introducing new macromolecular residual substances in breaking glue solution again.Together
Crossing the aqueous fracturing fluid that preparation method of the present invention is prepared has residue content relatively low and the advantages of fracturing fluid cost is low.
Embodiment
With reference to embodiments, the present invention is further described in detail, but is not limited to this.
If not the raw material used in embodiment refers in particular to, it is known, commercially available industrial chemicals, is specially：
Sodium alginate：Purity, it is commercially available；
Carboxymethyl cellulose, carboxylic propyl methocel, carboxymethyl hydroxyethyl cellulose and carboxymethyl hydroxypropyl cellulose：
It is commercially available
Borax：Purity, it is commercially available；
Ammonium persulfate：Purity, it is commercially available；
Potassium chloride, ammonium chloride, aluminum oxide：It is purity, commercially available；
Neopelex, lauryl sodium sulfate, benzene sulfonic acid sodium salt：It is purity, commercially available.
Embodiment 1
Aqueous fracturing fluid A described in the present embodiment includes following component：5.0g sodium alginate, 0.5g carboxymethyl cellulose
Element, 0.5g borax, 0.6g ammonium persulfate, 93.4g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate of above-mentioned specified quantitative is dissolved in 70g water, is well mixed, obtains viscous water；
（2）The borax of above-mentioned specified quantitative is dissolved in 23.4g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned specified quantitative
Ammonium persulfate gel breaker obtain aqueous fracturing fluid A.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid A described in the present embodiment is at 30 DEG C
Viscosity is 540mPas, in 170s-1Viscosity after rotating speed down cut 1h is 170mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 2
Aqueous fracturing fluid B described in the present embodiment includes following component：4g sodium alginate, 1.5g carboxymethyl cellulose
Element, 0.4g potassium borate, 0.5g ammonium persulfate, 93.6g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate of above-mentioned specified quantitative is dissolved in 70g water, is well mixed, obtains viscous water；
（2）The potassium borate of above-mentioned specified quantitative is dissolved in 23.6g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned specified quantitative
Ammonium persulfate gel breaker obtain aqueous fracturing fluid B.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid B described in the present embodiment is at 30 DEG C
Viscosity is 520mPas, in 170s-1Viscosity after rotating speed down cut 1h is 140mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 3
Aqueous fracturing fluid C described in the present embodiment includes following component：3.0g sodium alginate, 2.5g hydroxypropyl methyl
Cellulose, 0.3g boric acid, 0.4g potassium peroxydisulfate, 93.8g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate of above-mentioned specified quantitative is dissolved in 70g water, is well mixed, obtains viscous water；
（2）The boric acid of above-mentioned specified quantitative is dissolved in 23.8g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The hydroxypropyl methyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned spy
Quantitative potassium peroxydisulfate gel breaker obtains aqueous fracturing fluid C.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid C described in the present embodiment is at 30 DEG C
Viscosity is 520mPas, in 170s-1Viscosity after rotating speed down cut 1h is 110mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 4
Aqueous fracturing fluid D described in the present embodiment includes following component：2.0g sodium alginate, 2.0g carboxymethyl hydroxyl second
Base cellulose, 1g carboxymethyl cellulose, 0.2g boron triethyl, 0.2g sodium peroxydisulfate, 94.6g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate of above-mentioned specified quantitative is dissolved in 70g water, is well mixed, obtains viscous water；
（2）The boron triethyl of above-mentioned specified quantitative is dissolved in 24.6g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl hydroxyethyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned
The sodium peroxydisulfate gel breaker of specified quantitative obtains aqueous fracturing fluid D.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid D described in the present embodiment is at 30 DEG C
Viscosity is 480mPas, in 170s-1Viscosity after rotating speed down cut 1h is 70mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 5
Aqueous fracturing fluid E described in the present embodiment includes following component：1.5g sodium alginate, 0.5g carboxymethyl hydroxypropyl
Base cellulose, 0.15g borax, 0.6g ammonium persulfate, 1.0g ammonium chloride, 96.25g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate of above-mentioned specified quantitative and ammonium chloride are dissolved in 70g water, is well mixed, obtains viscous water；
（2）The borax of above-mentioned specified quantitative is dissolved in 26.25g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl hydroxypropyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned
The ammonium persulfate gel breaker of specified quantitative obtains aqueous fracturing fluid E.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid E described in the present embodiment is at 30 DEG C
Viscosity is 460mPas, in 170s-1Viscosity after rotating speed down cut 1h is 80mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 6
Aqueous fracturing fluid F described in the present embodiment includes following component：1.2g sodium alginate, 0.3g hydroxypropyl methyl
Cellulose, 0.4g carboxymethyl hydroxypropyl cellulose, 0.12g borax, 0.4g potassium peroxydisulfate, 3.0g potassium chloride, 0.1g
Neopelex, 94.48g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）By the sodium alginate of above-mentioned specified quantitative and, potassium chloride, neopelex, be dissolved in 70g water, mix
Close uniformly, obtain viscous water；
（2）The borax of above-mentioned specified quantitative is dissolved in 24.48g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The hydroxypropyl methyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned spy
Quantitative potassium peroxydisulfate gel breaker obtains aqueous fracturing fluid F.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid F described in the present embodiment is at 30 DEG C
Viscosity is 450mPas, in 170s-1Viscosity after-rotating speed down cut 1h is 65mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Embodiment 7
Aqueous fracturing fluid G described in the present embodiment includes following component：1.0g sodium alginate, 0.6g carboxymethyl cellulose
Element, 0.1g borax, 0.4g ammonium persulfate, 5.0g aluminium chloride, 0.1g neopelex, 92.80g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate, aluminium chloride and neopelex of above-mentioned specified quantitative are dissolved in 70g water, mixed
Uniformly, viscous water is obtained；
（2）The borax of above-mentioned specified quantitative is dissolved in 22.80g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned specified quantitative
Ammonium persulfate gel breaker obtain aqueous fracturing fluid G.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid G described in the present embodiment is at 30 DEG C
Viscosity is 440mPas, in 170s-1Rotating speed down cut 1h viscosity is 60mPas, and heat resistance and anti-shear performance are compound
Standard provides.
Embodiment 8
Aqueous fracturing fluid H described in the present embodiment includes following component：1.5g sodium alginate, 0.5g detergent alkylate sulphur
Sour sodium, 1.0g carboxymethyl cellulose, 0.15g borax, 0.6g ammonium persulfate, 96.25g water.
The preparation method of aqueous fracturing fluid described in the present embodiment is as follows：
（1）The sodium alginate, ammonium chloride and dodecyl phenenyl sulfate of above-mentioned specified quantitative are dissolved in 70g water, mixed
Uniformly, viscous water is obtained；
（2）The borax of above-mentioned specified quantitative is dissolved in 26.25g water, is well mixed, obtains cross-linking agent aqueous solution；
（3）By step（2）Described in cross-linking agent aqueous solution be slowly added into step（1）Described in viscous water in, obtain
To frozen glue solution；
（4）The carboxymethyl cellulose of above-mentioned specified quantitative is added into above-mentioned frozen glue solution, is eventually adding above-mentioned specified quantitative
Ammonium persulfate gel breaker obtain aqueous fracturing fluid H.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid H described in the present embodiment is at 30 DEG C
Viscosity is 480mPas, in 170s-1Viscosity after rotating speed down cut 1h is 70mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Comparative example
By 30.0g carboxymethyl cellulose, 20.0g glyoxal, 12.0g chromium sulfate, 2.5g acrylamide,
35.5g water is well mixed, and fracturing fluid is prepared.
According to method of testing as defined in standard SYT5107-2005, aqueous fracturing fluid A described in the present embodiment is at 30 DEG C
Viscosity is 460mPas, in 170s-1Viscosity after rotating speed down cut 1h is 55mPas, and heat resistance and anti-shear performance are answered
Standardization provides.
Example is evaluated in performance test
The present invention is further taken to the aqueous fracturing fluid A~H and comparative example being prepared in embodiment 1~8
Grittiness can be as follows with broken glue performance test, method of testing：
Gel breaking capacity method of testing：500ml beakers are taken, take what is be prepared in above-described embodiment 1~8 and comparative example respectively
Fracturing fluid 250ml, the fracturing fluid in each of which embodiment take three parts, are then mixed into respectively into every part of fracturing fluid
0.25g ammonium persulfates, the constant temperature at 65 DEG C, three parts of fracturing fluids difference constant temperature 0.5h, 1h and 2h in each embodiment, it is utilized respectively
Quantitative filter paper filters three parts of fracturing fluids in each embodiment residue after constant temperature breaks glue 0.5h, 1h and 2h respectively, weighs residue
Weight, residue content of each fracturing fluid in the different broken glue times is calculated, while determine each fracturing fluid using Ping Shi viscosimeters and exist
Viscosity after the difference broken glue time, test result are shown in Table 1.
Prop-carrying capacity is tested：500ml beakers are taken, respectively the fracturing fluid being prepared in Example 1~8 and comparative example
250ml, the fracturing fluid in each of which embodiment take three parts, then three parts of fracturing fluids into each embodiment respectively
In be separately added into 20/40 mesh quartz sand, in three parts of fracturing fluids the addition of quartz sand be respectively account for fracturing fluid volume 20wt%,
30wt% and 40wt%, stirs, and observes the decrease speed of quartz sand, and test result is shown in Table 2.
The aqueous fracturing fluid gel breaking capacity test result of table 1
The aqueous fracturing fluid prop-carrying capacity test result of table 2
Percentage of the sand described in table 2 than accounting for fracturing fluid volume for the quartz sand that is added into fracturing fluid.
From Tables 1 and 2 test result, aqueous fracturing fluid of the present invention has excellent gel breaking capacity and takes sand energy
Power, residue content after breaking gel disclosure satisfy that the pressure break in oil field far below the level of residue of water base guanidine gum fracturing fluid in the prior art
Construction requirement.
Although the present invention has carried out detailed elaboration to it by above-mentioned specific embodiment, this specialty is common
Technical staff should be understood that the change for any form and details without departing from claims made on this basis
Change, belong to invention which is intended to be protected.
Claims (10)
1. a kind of aqueous fracturing fluid, including gelatinizing agent, thickener, crosslinking agent, gel breaker and water, it is characterised in that the plastic
Agent is sodium alginate, the thickener is modified cellulose；Wherein, in terms of the quality of aqueous fracturing fluid, the sodium alginate
Addition is 0.5~5.0wt%, and the addition of the modified cellulose is 0.5~3.0wt%, the crosslinking agent and the sea
Mosanom addition ratio is 1:10, the content of the gel breaker is 0.2~0.6wt%, and surplus is water；
The preparation method of the aqueous fracturing fluid comprises the following steps：
(1) it is sodium alginate is soluble in water, it is well mixed, obtains viscous water；
(2) it is crosslinking agent is soluble in water, it is well mixed, obtains cross-linking agent aqueous solution；
(3) cross-linking agent aqueous solution in the step (2) is slowly added in the viscous water in the step (1), obtains frozen glue
Solution；
(4) modified cellulose is added in above-mentioned frozen glue solution, is eventually adding the gel breaker and obtains aqueous fracturing fluid.
2. aqueous fracturing fluid according to claim 1, it is characterised in that in terms of the weight of aqueous fracturing fluid, the marine alga
The content of sour sodium is 0.5~1.5wt%, and the content of the modified cellulose is 0.5~1.5wt%, the crosslinking agent with it is described
Sodium alginate addition ratio is 1:10, the content of the gel breaker is 0.2~0.6wt%, and surplus is water.
3. aqueous fracturing fluid according to claim 2, it is characterised in that the modified cellulose be carboxymethyl cellulose,
Any one or a few in carboxylic propyl methocel, carboxymethyl hydroxyethyl cellulose and carboxymethyl hydroxypropyl cellulose.
4. aqueous fracturing fluid according to claim 2, it is characterised in that the gel breaker is ammonium persulfate, sodium peroxydisulfate
With any one in potassium peroxydisulfate.
5. aqueous fracturing fluid according to claim 4, it is characterised in that the crosslinking agent is boron triethyl, borax, boric acid
Any one in potassium or boric acid.
6. according to any described aqueous fracturing fluid of Claims 1 to 5, it is characterised in that also including anti-clayswelling agent；Wherein,
The anti-clayswelling agent is any one in potassium chloride, ammonium chloride or aluminium chloride；The anti-clayswelling agent content accounts for the water
1~5wt% of base fracturing fluid quality.
7. according to any aqueous fracturing fluid of Claims 1 to 5, it is characterised in that also including cleanup additive；Wherein, it is described to help
Row's agent is anion surfactant；The content of the cleanup additive accounts for the 0.1~0.5% of the aqueous fracturing fluid quality.
8. aqueous fracturing fluid according to claim 6, it is characterised in that also including cleanup additive；Wherein, the cleanup additive is the moon
Ionic surface active agent；The content of the cleanup additive accounts for the 0.1~0.5% of the aqueous fracturing fluid quality.
9. aqueous fracturing fluid according to claim 1, it is characterised in that the sodium alginate is by filtering or centrifugal treating
Sodium alginate afterwards.
10. the preparation method of any aqueous fracturing fluid of claim 6~9, comprises the following steps：
(1) sodium alginate or sodium alginate and anti-clayswelling agent or sodium alginate, anti-clayswelling agent and cleanup additive are dissolved in water
In, it is well mixed, obtains viscous water；
(2) it is crosslinking agent is soluble in water, it is well mixed, obtains cross-linking agent aqueous solution；
(3) cross-linking agent aqueous solution in the step (2) is slowly added in the viscous water in the step (1), obtains frozen glue
Solution；
(4) modified cellulose is added in above-mentioned frozen glue solution, is eventually adding the gel breaker and obtains aqueous fracturing fluid.
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| CN109943314A (en) * | 2019-02-25 | 2019-06-28 | 姜向军 | A kind of high viscous steady aqueous fracturing fluid of high fever |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100999659A (en) * | 2006-12-29 | 2007-07-18 | 中国科学院长春应用化学研究所 | Graft type fracturing fluid and preparation process thereof |
| CN100999658A (en) * | 2006-12-29 | 2007-07-18 | 中国科学院长春应用化学研究所 | Composite fracturing fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999659A (en) * | 2006-12-29 | 2007-07-18 | 中国科学院长春应用化学研究所 | Graft type fracturing fluid and preparation process thereof |
| CN100999658A (en) * | 2006-12-29 | 2007-07-18 | 中国科学院长春应用化学研究所 | Composite fracturing fluid |
Non-Patent Citations (1)
| Title |
|---|
| 压裂液;赵福麟;《石油大学学报(自然科学版)》;19860605;第10卷(第03期);75-80 * |
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