CN109135687A - A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer and preparation method thereof - Google Patents
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer and preparation method thereof Download PDFInfo
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- CN109135687A CN109135687A CN201810865857.8A CN201810865857A CN109135687A CN 109135687 A CN109135687 A CN 109135687A CN 201810865857 A CN201810865857 A CN 201810865857A CN 109135687 A CN109135687 A CN 109135687A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/28—Friction or drag reducing additives
Abstract
The invention belongs to a kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer and preparation method thereof, the shale gas fracturing fluid is with Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 20-30 parts of water-soluble monomer, 5-8 parts of oil-soluble dispersant, 5-8 parts of inorganic particle dispersion agent, 0.01-0.02 parts of oxidation-reduction initiator, oily 30-50 parts of phase, 30-50 parts of clear water.The friction reducer that the present invention prepares synthesis is prepared using suspension polymerization, and effective component is suspended in system, is not wrapped up mutually by oily, is not needed phase inversion process, in water being capable of rapid dispersing and dissolving；And then the shale gas fracturing fluid added with friction reducer has frictional resistance low, viscosity is high, the good feature of temperature resistance salt resistant character, is particularly suitable for shale gas fracturing reform.
Description
Technical field
The invention belongs to pressure break friction reducer fields, and in particular to a kind of shale gas fracturing fluid Instant suspension salt resistance drop resistance
Agent and preparation method thereof.
Background technique
China's shale gas is resourceful, and the shale gas exploitation in Sichuan-chongqing Region has obtained industrial gas at present, is in
The stage of high speed development.Pressure break is the important means to the transformation volume increase of shale gas well, and friction reducer adds as the important of fracturing fluid
Add agent, to pressing crack construction operating risk and difficulty is reduced, adds sand, fracturing transformation effect, fracture development and extension and gas well
Volume increase and stable yields have important role.Performance requirement to shale gas pressure break friction reducer includes: (1) high resistance-reducing efficiency；
(2) higher salt tolerance；(3) compared with high temperature tolerance；(4) quick solvability；(5) suitable relative molecular weight is to reduce reservoir wound
Evil；(6) inexpensive, it is nontoxic, meet corresponding oilfield operation, discharge meets environmentally friendly needs.
Currently, the most common water base friction reducer of domestic application is poly- third generated by one or more different monomer copolymerization
Acrylamide friction reducer, resistance-reducing performance are substantially better than cellulose derivative.Domestic friction reducer is largely using reverse phase cream
The water-in-oil emulsion friction reducer of liquid polymerization preparation needs the process of a phase inversion since foreign minister is oil in course of dissolution,
Dissolution time is generally in 1min or more, under conditions of 0.1% dosage, kinematic viscosity be 1.5~1.8mm2/s, dissolution time compared with
Long, viscosity is lower, cannot preferably play the role of dropping resistance at the scene in operation.
Summary of the invention
It is an object of the invention to: disclose a kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer and its preparation
Method, the friction reducer that the present invention prepares synthesis are prepared using suspension polymerization, and effective component is suspended in system, not oily
It mutually wraps up, does not need phase inversion process, it in water being capable of rapid dispersing and dissolving；And then the shale gas fracturing fluid added with friction reducer has
Have that frictional resistance is low, viscosity is high, the good feature of temperature resistance salt resistant character, is particularly suitable for shale gas fracturing reform.
The technical solution adopted by the invention is as follows:
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, shale gas fracturing fluid Instant suspend anti-
Salt friction reducer is by including that the raw material of following parts by weight is made: 20-30 parts of water-soluble monomer, 5-8 parts of oil-soluble dispersant, inorganic
5-8 parts of particle dispersants, 0.01-0.02 parts of oxidation-reduction initiator, oily 30-50 parts of phase, 30-50 parts of clear water.
Oil-soluble dispersant, inorganic particle dispersion agent in the friction reducer it is lipophilic since its intramolecular has simultaneously and
The interfacial agent of two kinds of opposite natures of hydrophily uniform can disperse those and be poorly soluble the water-soluble monomer in liquid, together
When can also prevent the sedimentation and cohesion of particle, amphipathic reagent needed for forming stable suspension, so that water-soluble monomer is in oil
It is stabilized in phase, it is anti-that oxidation-reduction initiator can be used for causing alkenes, the free radical polymerization of double vinyl monomers and combined polymerization
It answers.
Preferably, the shale gas fracturing fluid is with Instant suspension salt resistance friction reducer by the raw material including following parts by weight
It is made: 22-28 parts of water-soluble monomer, 6-7 parts of oil-soluble dispersant, 6-7 parts of inorganic particle dispersion agent, oxidation-reduction initiator
0.012-0.018 parts, oily 35-45 parts of phase, 35-45 parts of clear water.
Preferably, the shale gas fracturing fluid is with Instant suspension salt resistance friction reducer by the raw material including following parts by weight
It is made: 25 parts of water-soluble monomer, 6.5 parts of oil-soluble dispersant, 6.5 parts of inorganic particle dispersion agent, oxidation-reduction initiator
0.015 part, oily 40 parts of phase, 40 parts of clear water.
Further, the water-soluble monomer include acrylamide, maleic acid, 2- acrylamido-methyl propane sulfonic acid 2
Kind or several compositions.
Further, the oil-soluble dispersant includes the combination of one or more of potassium oleate, Span 80, Span 60
Object.
Further, the inorganic particle dispersion agent is calcium carbonate.
Further, the oil is mutually one or more of white oil, diesel oil, kerosene, condensate composition.
The technical solution adopted by the invention is as follows:
A kind of preparation method of shale gas fracturing fluid Instant suspension salt resistance friction reducer the following steps are included:
(1) water-soluble monomer is dissolved in clear water, obtains monomer solution；
(2) oily phase, oil-soluble dispersant, inorganic particle dispersion agent are sequentially added in the reaction vessel, obtain mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution adds oxidation-reduction initiator after so that the mixture is uniformly dispersed；
(4) 4-5h is reacted under the conditions of 30~40 DEG C up to the friction reducer.
The method that the present invention creatively uses suspension polymerisation prepares the friction reducer, and suspension polymerization is usually applied to gather
The production of vinyl chloride, the method for carrying out free radical polymerization that will be suspended in water dissolved with the monomer of initiator with droplet-like are known as suspending
Polymerization.Entirety sees that water is continuous phase, and monomer is dispersed phase.But the present invention is creatively used for production shale air pressure
Liquid friction reducer is split, oily phase, oil-soluble dispersant, inorganic particle dispersion agent is first added, it is rear that monomer water is added dropwise with nitrogen gas stirring
Solution is eventually adding oxidation-reduction initiator, the friction reducer reacted, is not wrapped up mutually by oily, does not need phase inversion process,
In water in 20s, can rapid dispersing and dissolving, the addition of friction reducer changes the planar velocity section of shale gas fracturing fluid, makes side
Shearing force in interlayer carries out distribution again, and above-mentioned effect changes the intensity and structure feature for generating whirlpool, makes turbulence edge
Apparent improvement occurs for the nearly wall construction of interlayer, to realize resistance reducing effect.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
(1) friction reducer of present invention preparation synthesis uses the suspending friction reducer of suspension polymerization preparation, and effective component is outstanding
Float in system, do not wrapped up mutually by oily, do not need phase inversion process, in water can rapid dispersing and dissolving, test dissolution time
Within 20s, after friction reducer strand is opened rapidly, viscosity is also higher, and under conditions of 0.1% dosage, kinematic viscosity is
2.5~2.8mm2/s, Lab-evaluation resistance-reducing yield reach 78%；
(2) the present invention relates to a kind of shale gas fracturing fluid preparation methods of Instant suspension salt resistance friction reducer, using this
The friction reducer dissolution time of method preparation is fast, and then the shale gas fracturing fluid added with friction reducer has frictional resistance low, and viscosity is high, resists
The good feature of warm salt resistant character is particularly suitable for shale gas fracturing reform.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Therefore, the detailed description of the embodiment of the present invention presented below is not intended to limit claimed invention
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, the shale gas fracturing fluid described in the present embodiment
With Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 20 parts of water-soluble monomer, oil-soluble disperse
5 parts of agent, 5 parts of inorganic particle dispersion agent, 0.01 part of oxidation-reduction initiator, oily 30 parts of phase, 30 parts of clear water.
The preparation method of above-mentioned shale gas fracturing fluid Instant suspension salt resistance friction reducer a kind of the following steps are included:
(1) 20 parts of water-soluble monomers are dissolved in clear water, obtain monomer solution；
(2) 30 parts of oily phases, 5 parts of oil-soluble dispersants, 5 parts of inorganic particle dispersion agent are sequentially added in the reaction vessel, are obtained
To mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution after so that the mixture is uniformly dispersed, adds 0.01 part of oxidation-reduction initiator；
(4) 4.5h is reacted under the conditions of 35 DEG C up to the friction reducer.
Using this method prepare friction reducer dissolution time it is fast, and then added with friction reducer shale gas fracturing fluid have rub
Hinder low, viscosity height, the good feature of temperature resistance salt resistant character, particularly suitable shale gas fracturing reform.Above-mentioned dissolution time is tested in 20s
Within, after strand is opened rapidly, viscosity is also higher, under conditions of 0.1% dosage, kinematic viscosity 2.5mm2/s, and room
Inner evaluation resistance-reducing yield reaches 76%.
Embodiment 2
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, the shale gas fracturing fluid described in the present embodiment
With Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 30 parts of water-soluble monomer, oil-soluble disperse
8 parts of agent, 8 parts of inorganic particle dispersion agent, 0.02 part of oxidation-reduction initiator, oily 50 parts of phase, 50 parts of clear water.
The preparation method of above-mentioned shale gas fracturing fluid Instant suspension salt resistance friction reducer a kind of the following steps are included:
(1) 30 parts of water-soluble monomers are dissolved in 50 parts of clear water, obtain monomer solution；
(2) 50 parts of oily phases, 8 parts of oil-soluble dispersants, 8 parts of inorganic particle dispersion agent are sequentially added in the reaction vessel, are obtained
To mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution after so that the mixture is uniformly dispersed, adds 0.02 part of oxidation-reduction initiator；
(4) 5h is reacted under the conditions of 30 DEG C up to the friction reducer.
Using this method prepare friction reducer dissolution time it is fast, and then added with friction reducer shale gas fracturing fluid have rub
Hinder low, viscosity height, the good feature of temperature resistance salt resistant character, particularly suitable shale gas fracturing reform.Above-mentioned dissolution time is tested in 20s
Within, after strand is opened rapidly, viscosity is also higher, under conditions of 0.1% dosage, kinematic viscosity 2.6mm2/s, and room
Inner evaluation resistance-reducing yield reaches 77%.
Embodiment 3
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, the shale gas fracturing fluid described in the present embodiment
With Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 22 parts of water-soluble monomer, oil-soluble disperse
6 parts of agent, 6 parts of inorganic particle dispersion agent, 0.012 part of oxidation-reduction initiator, oily 35 parts of phase, 35 parts of clear water.
The preparation method of above-mentioned shale gas fracturing fluid Instant suspension salt resistance friction reducer a kind of the following steps are included:
(1) 22 parts of water-soluble monomers are dissolved in 35 parts of clear water, obtain monomer solution；
(2) 35 parts of oily phases, 6 parts of oil-soluble dispersants, 6 parts of inorganic particle dispersion agent are sequentially added in the reaction vessel, are obtained
To mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution after so that the mixture is uniformly dispersed, adds 0.012 part of oxidation-reduction initiator；
(4) 4h is reacted under the conditions of 40 DEG C up to the friction reducer.
Using this method prepare friction reducer dissolution time it is fast, and then added with friction reducer shale gas fracturing fluid have rub
Hinder low, viscosity height, the good feature of temperature resistance salt resistant character, particularly suitable shale gas fracturing reform.Above-mentioned dissolution time is tested in 20s
Within, after strand is opened rapidly, viscosity is also higher, under conditions of 0.1% dosage, kinematic viscosity 2.7mm2/s, and room
Inner evaluation resistance-reducing yield reaches 78%.
Embodiment 4
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, the shale gas fracturing fluid described in the present embodiment
With Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 28 parts of water-soluble monomer, oil-soluble disperse
7 parts of agent, 7 parts of inorganic particle dispersion agent, 0.018 part of oxidation-reduction initiator, oily 45 parts of phase, 45 parts of clear water.
The preparation method of above-mentioned shale gas fracturing fluid Instant suspension salt resistance friction reducer a kind of the following steps are included:
(1) 28 parts of water-soluble monomers are dissolved in 45 parts of clear water, obtain monomer solution；
(2) 45 parts of oily phases, 7 parts of oil-soluble dispersants, 7 parts of inorganic particle dispersion agent are sequentially added in the reaction vessel, are obtained
To mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution after so that the mixture is uniformly dispersed, adds 0.018 part of oxidation-reduction initiator；
(4) 5h is reacted under the conditions of 30 DEG C up to the friction reducer.
Using this method prepare friction reducer dissolution time it is fast, and then added with friction reducer shale gas fracturing fluid have rub
Hinder low, viscosity height, the good feature of temperature resistance salt resistant character, particularly suitable shale gas fracturing reform.Above-mentioned dissolution time is tested in 20s
Within, after strand is opened rapidly, viscosity is also higher, under conditions of 0.1% dosage, kinematic viscosity 2.65mm2/s, and room
Inner evaluation resistance-reducing yield reaches 78%.
Embodiment 5
A kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, the shale gas fracturing fluid described in the present embodiment
With Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: 25 parts of water-soluble monomer, oil-soluble disperse
6.5 parts of agent, 6.5 parts of inorganic particle dispersion agent, 0.015 part of oxidation-reduction initiator, oily 40 parts of phase, 40 parts of clear water.
The preparation method of above-mentioned shale gas fracturing fluid Instant suspension salt resistance friction reducer a kind of the following steps are included:
(1) 25 parts of water-soluble monomers are dissolved in 40 parts of clear water, obtain monomer solution；
(2) 40 parts of oily phases, 6.5 parts of oil-soluble dispersants, 6.5 parts of inorganic particle dispersions are sequentially added in the reaction vessel
Agent obtains mixture；
(3) in the mixture in step (2) reaction vessel, it is passed through nitrogen gas stirring, then a dropping step (1) is resulting
Monomer solution after so that the mixture is uniformly dispersed, adds 0.015 part of oxidation-reduction initiator；
(4) 4.5h is reacted under the conditions of 35 DEG C up to the friction reducer.
Using this method prepare friction reducer dissolution time it is fast, and then added with friction reducer shale gas fracturing fluid have rub
Hinder low, viscosity height, the good feature of temperature resistance salt resistant character, particularly suitable shale gas fracturing reform.Above-mentioned dissolution time is tested in 20s
Within, after strand is opened rapidly, viscosity is also higher, under conditions of 0.1% dosage, kinematic viscosity 2.8mm2/s, and room
Inner evaluation resistance-reducing yield reaches 78%.
Comparative example 1
Friction reducer in the prior art described in this comparative example, the friction reducer is by the raw material system including following parts by weight
At: 35 parts of acrylamide (non-ionic monomer), 10 parts of dimethyl diallyl ammonium chloride (cationic monomer), 7# white oil (non-pole
Property solvent) 16 parts, 3 parts of sorbitan trioleate (emulsifier), 0.05 part of fatty alcohol polyoxyethylene ether (initiator), fatty alcohol
7 parts of polyoxyethylene ether (phase inversion agent), 0.015 part of azo dicyano valeric acid (initiator).
The Lab-evaluation resistance-reducing yield of the friction reducer in the prior art is 67%, while the friction reducer, in water 30s
It is interior to dissolve.And the friction reducer Lab-evaluation resistance-reducing yield in the present invention is 78%, dissolution time 20s, compared to this comparison
Friction reducer in example, resistance-reducing yield increase, and dissolution time is substantially reduced, shale gas pressing crack construction demand preferably.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (8)
1. a kind of shale gas fracturing fluid Instant suspension salt resistance friction reducer, it is characterised in that: the shale gas fracturing fluid speed
Molten type suspension salt resistance friction reducer is by including that the raw material of following parts by weight is made: 20-30 parts of water-soluble monomer, oil-soluble dispersant
5-8 parts, 5-8 parts of inorganic particle dispersion agent, 0.01-0.02 parts of oxidation-reduction initiator, oily 30-50 parts of phase, 30-50 parts of clear water.
2. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Shale gas fracturing fluid is stated with Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: water-soluble monomer
22-28 parts, 6-7 parts of oil-soluble dispersant, 6-7 parts of inorganic particle dispersion agent, 0.012-0.018 parts of oxidation-reduction initiator, oil
35-45 parts of phase, 35-45 parts of clear water.
3. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Shale gas fracturing fluid is stated with Instant suspension salt resistance friction reducer by including that the raw material of following parts by weight is made: water-soluble monomer 25
Part, 6.5 parts of oil-soluble dispersant, 6.5 parts of inorganic particle dispersion agent, 0.015 part of oxidation-reduction initiator, oily 40 parts of phase, clear water
40 parts.
4. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Stating water-soluble monomer includes acrylamide, maleic acid, 2 kinds of 2- acrylamido-methyl propane sulfonic acid or several compositions.
5. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Stating oil-soluble dispersant includes one or more of potassium oleate, Span 80, Span 60 composition.
6. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Stating inorganic particle dispersion agent is calcium carbonate.
7. a kind of shale gas fracturing fluid according to claim 1 Instant suspension salt resistance friction reducer, it is characterised in that: institute
Stating oily is mutually one or more of white oil, diesel oil, kerosene, condensate composition.
8. a kind of preparation method of Instant suspension salt resistance friction reducer of shale gas fracturing fluid described in claim 1-7, the party
Method is suspension polymerization, it is characterised in that:
(1) water-soluble monomer is dissolved in clear water, obtains monomer solution；
(2) oily phase, oil-soluble dispersant, inorganic particle dispersion agent are sequentially added in the reaction vessel, obtain mixture；
(3) in the mixture in step (2) reaction vessel, nitrogen gas stirring, then a dropping step (1) resulting monomer are passed through
Aqueous solution adds oxidation-reduction initiator after so that the mixture is uniformly dispersed；
(4) 4-5h is reacted under the conditions of 30~40 DEG C up to the friction reducer.
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| EP1881017A2 (en) * | 2006-07-21 | 2008-01-23 | National Starch and Chemical Investment Holding Corporation | Sulfonated graft copolymers |
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Application publication date: 20190104 |