CN105924575A - Composite drag reducer special for shale gas and preparation method thereof - Google Patents
Composite drag reducer special for shale gas and preparation method thereof Download PDFInfo
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- CN105924575A CN105924575A CN201610487149.6A CN201610487149A CN105924575A CN 105924575 A CN105924575 A CN 105924575A CN 201610487149 A CN201610487149 A CN 201610487149A CN 105924575 A CN105924575 A CN 105924575A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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 discloses a composite drag reducer special for shale gas and a preparation method thereof. The composite drag reducer is prepared from the following raw materials in parts by weight: 750 to 950 parts of water, 90 to 130 parts of cationic monomers, 700 to 1,300 parts of acrylamide, 9.5 to 37.5 parts of an initiator A, and 7.5 to 37.5 parts of an initiator B. The composite drag reducer special for the shale gas and the preparation method thereof have the beneficial effects that the composite drag reducer special for the shale gas is temperature resistant, ageing resistant and salt resistant, has good compatibility with various additives for fracturing and acidizing, and has a great significance for yield increment of oil and gas fields; when the composite drag reducer special for the shale gas is produced and synthesized, the temperature can reach 150 DEG C or above; production and synthesis are completed in an instant; the polymerization time is short; the reaction is smooth and stable; the production efficiency is high; the product performance is very stable.
Description
Technical field
The present invention relates to a kind of shale gas specific complex drag reducer and preparation method thereof, belong to oilfield stimulation and use
Agent technical field.
Background technology
Shale gas fracture acidizing is the well stimulation that shale gas oil-gas field development is main.Fracturing fluid is pressure break mistake
The working solution of journey, fracturing fluid pumps into stratum after the supercharging of high pressure pumping-in equipment, presses off crack in the earth formation, and
Extend crack.General fracturing fluid is mainly by thickening agent and cross-linking agent and other additive group with reservoir compatibility
Become, owing to fracturing fluid main purpose is conveying fracturing propping agents and reduces leak-off, generally use cross-linking agent by it
Form frozen glue, have and preferably carry the ability of proppant and relatively low filtration capacity.But owing to fracturing fluid is handed over
After connection, viscosity raises rapidly, and usual viscosity can reach more than 1000mPa.S, therefore flows in tubing string and has
Bigger frictional resistance, at present at the hydroxypropyl guar fracturing fluid system that petroleum industry is conventional, after using organic zirconium crosslinking,
Its frictional resistance generally correspond to clear water with under the conditions of frictional resistance about 30%.
In Southwest China shale gas oil-gas reservoir buried depth is typically at about 3500-5000m, particularly
Shale gas field with middle petrochemical industry Jiao's masonry dam as representative, needs to improve gas well yield by the seam net pressure break of huge discharge.
But due to oil reservoir bury deeply, formation temperature high, huge discharge sand fracturing or alternately acid fracturing process fracturing fluid rub
Hindering higher, restricted by ground installation infusion ability and the pressure-bearing limit, stimulation treatment process parameter receives necessarily
Restriction.Such as the reservoir of degree of depth 4500m, bottom-hole treating pressure is at about 100MPa, if not
Take Drag reduction devices, use conventional fracturing fluid system ground construction pressure to be up to about 100MPa at present,
Substantially beyond the limit of fracturing unit.
Reduce at present Hydro Fracturing Stimulation Treatment operation pressure can also by the method for weighted fracture fluid, but by
Crosslinking and the temperature and shearing sustainability of fracturing fluid can be affected in adding salt latter aspect, and put into the highest,
Therefore the frictional resistance of fracturing fluid system must be reduced, so that well stimulation can be implemented smoothly.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of polymerization time is short,
Reacting balance, production cost are low, the shale gas specific complex drag reducer of reliable product quality, to effectively reduce
Hydro Fracturing Stimulation Treatment operation pressure.
The technical solution used in the present invention is as follows:
A kind of shale gas specific complex drag reducer, raw material comprises following components by weight: water 750～950 parts,
Cationic monomer 90～130 parts, acrylamide 700～1300 parts, initiator A 9.5～37.5 parts, initiation
Agent B 7.5～37.5 parts；And prepare by the following method:
(1) dosing: add water in dosing still, under agitation adds cationic monomer, then carries out dosing still
Heating, under agitation adds acrylamide, treats that it is completely dissolved and obtains preparing liquid, and the temperature of whole process is not
More than 40 DEG C；
(2) regulation pH value: regulate the pH value of described preparation liquid to 6.0～9.5；This step pH value adjusts permissible
Conventional basic materials is used to be adjusted, such as: calcium hydroxide, sodium hydroxide, potassium hydroxide etc., preferably
Regulation pH value is to 7～9；
(3) polymerization: step (2) gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid
Initiator A aqueous solution and initiator B aqueous solution, then stand and treat that implode is reacted, and implode obtains after having reacted
To polymer expander；
(4) post processing: finally polymer expander is carried out pelletize, dries, sieve, i.e. obtain described dry-type
Structural fluid drag reducer；
Wherein: described cationic monomer is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, octadecyldimethyl allyl
Ammonium chloride, methacrylic acid octyl group ethyl ester, butyl methacrylate, octadecyl acrylate, acrylic acid
Stearyl, trifluoroethyl methacrylate, Hexafluorobutyl mathacrylate, dimethylaminoethyl
One or more in ethyl ester, described initiator A is peroxide, and described initiator B is sulphite.
Described initiator A be potassium peroxydisulfate, Ammonium persulfate., hydrogen peroxide one or more, described in draw
Send out agent B be sodium sulfite, sodium sulfite, potassium sulfite one or more.
Further, described raw material comprises following components by weight: water 800～900 parts, sun from
Sub-monomer 100～120 parts, acrylamide 800～1200 parts, initiator A 15～30 parts, initiator B 12～
30 parts.
The mass concentration of described initiator A aqueous solution is 1～3%, the quality of described initiator B aqueous solution
Concentration is 1～3%.
Initiator can by different concentration reach control polymerization rate effect, further,
The mass concentration of described initiator A aqueous solution is 1.5～2.5%, the mass concentration of described initiator B aqueous solution
It is 1.5～2.5%.
The preparation method of a kind of shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: added by 750～950 parts of water in dosing still, under agitation adds 90～130 parts of cation monos
Body, then heats dosing still, under agitation adds 700～1300 parts of acrylamides, treats that it is complete
Dissolving obtains preparing liquid, and the temperature of whole process is not more than 40 DEG C；
(2) regulation pH value: regulate the pH value of described preparation liquid to 6.0～9.5；This step pH value adjusts permissible
Conventional basic materials is used to be adjusted, such as: calcium hydroxide, sodium hydroxide, potassium hydroxide etc., preferably
Regulation pH value is to 7～9；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Sending out agent A aqueous solution and initiator B aqueous solution, then stand and treat that implode is reacted, implode obtains after having reacted
Polymer expander；
(4) post processing: finally polymer expander is carried out pelletize, dries, sieve, i.e. obtain described dry-type
Structural fluid drag reducer；
Wherein: described cationic monomer is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, octadecyldimethyl allyl
Ammonium chloride, methacrylic acid octyl group ethyl ester, butyl methacrylate, octadecyl acrylate, acrylic acid
Stearyl, trifluoroethyl methacrylate, Hexafluorobutyl mathacrylate, dimethylaminoethyl
One or more in ethyl ester, isocyanate ethyl methacrylate, described initiator A is peroxide,
Described initiator B is sulphite.
Described initiator A be potassium peroxydisulfate, Ammonium persulfate., hydrogen peroxide one or more, described in draw
Send out agent B be sodium sulfite, sodium sulfite, potassium sulfite one or more.
Further, described each component is in parts by weight: water 800～900 parts, cationic monomer 100～
120 parts, acrylamide 800～1200 parts, initiator A 15～30 parts, initiator B 12～30 parts.
The mass concentration of described initiator A aqueous solution is 1～3%, the quality of described initiator B aqueous solution
Concentration is 1～3%.
Initiator can by different concentration reach control polymerization rate effect, further,
The mass concentration of described initiator A aqueous solution is 1.5～2.5%, the mass concentration of described initiator B aqueous solution
It is 1.5～2.5%.
The structural type drag reducer using the method synthesis is according to macromolecular solution rheology theory, macromolecule
Solution Theory of Viscoelasticity, structural fluid rheology theory and the new development of application thereof, the chemical agent of development of new,
It in the solution strand can automatically associate and form the coalition i.e. supramolecular aggregation of multiple molecules (they are with speed
Rate graded and reversible), form further the supermolecule spacial framework being covered with whole solution space, become
For typical structural fluid, reversible association can be carried out at high shear rates due to supramolecular aggregation, therefore
Its resistance reducing performance is the most excellent, and its dissolution velocity just can be the most swelling within 3 minutes, and drag reducer concentration is
When 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 80%.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: described shale
Gas specific complex drag reducer, product heatproof, ageing-resistant, salt tolerant, and with the various additive compatibilities of fracture acidizing
Property good, significant to oil gas field volume increase, when described shale gas specific complex drag reducer produces synthesis, temperature can
Reaching more than 150 DEG C, and be to complete in moment, polymerization time is short, reacting balance, and production efficiency is high, product
Performance is highly stable.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except
Beyond mutually exclusive feature and/or step, all can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, all can by other equivalence or there is class
Replaced like the alternative features of purpose.I.e., unless specifically stated otherwise, each feature is a series of equivalence or class
Like an example in feature.
The shale gas specific complex drag reducer of the present invention, each raw material is commercially available.
Embodiment 1
The present embodiment one shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: the water of 750 weight portions is added in dosing still, under agitation adds the cation of 90 weight portions
Monomer MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, then heats dosing still, under agitation adds
The acrylamide of 700 weight portions, treats that it is completely dissolved and obtains preparing liquid, the temperature of whole process is 40 DEG C；
(2) regulation pH value: use calcium hydroxide to regulate the pH value of described preparation liquid to 6.5；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Send out agent A potassium peroxydisulfate 9.5 weight portion and (be configured to the persulfate aqueous solution that concentration is 1%, potassium peroxydisulfate water
Solution is 950 weight portions) and initiator B sodium sulfite 7.5 weight portion (be configured to the Asia that concentration is 1%
Sodium bisulphate solution, aqueous solution of sodium bisulfite is 750 weight portions), then stand and treat that implode is reacted, quick-fried
Poly-reaction obtains polymer expander after completing；
(4) post processing: finally polymer expander is carried out pelletize, dries and (gained drag reducer granule is inserted back
Turning percolation machine to be dried, temperature controls, at 95～100 DEG C, the most again drag reducer granule to be inserted vibratory liquefaction
Bed be dried, temperature controls at 75～80 DEG C), screening (will dry after drag reducer granule through 80 targets
Sieve screening), i.e. obtain described shale gas specific complex drag reducer.
The drag reducer white in appearance powder synthesized by the method, dissolution time 2～3 minutes, drag reducer
When concentration is 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 80%.
Embodiment 2
The present embodiment one shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: the water of 800 weight portions is added in dosing still, under agitation add the sun of 100 weight portions from
Sub-monomer MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, then heats dosing still, adds
Entering the acrylamide of 800 weight portions, treat that it is completely dissolved and obtain preparing liquid, the temperature of whole process is 28 DEG C；
(2) regulation pH value: use calcium hydroxide to regulate the pH value of described preparation liquid to 7；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Send out agent A Ammonium persulfate. 15 weight portion and (be configured to the ammonium persulfate aqueous solution that concentration is 1.5%, Ammonium persulfate. water
Solution is 1000 weight portions) and initiator B sodium sulfite 12 weight portion (be configured to the Asia that concentration is 1.5%
Aqueous sodium persulfate solution, sodium sulfite aqueous solution is 800 weight portions), then standing and treat that implode is reacted, implode is anti-
Polymer expander should be obtained after completing；
(4) post processing: finally polymer expander is carried out pelletize, dries and (gained drag reducer granule is inserted back
Turning percolation machine to be dried, temperature controls, at 95～100 DEG C, the most again drag reducer granule to be inserted vibratory liquefaction
Bed be dried, temperature controls at 75～80 DEG C), screening (will dry after drag reducer granule through 80 targets
Sieve screening), i.e. obtain described shale gas specific complex drag reducer.
The drag reducer white in appearance powder synthesized by the method, dissolution time 2～3 minutes, drag reducer
When concentration is 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 75%.
Embodiment 3
The present embodiment one shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: the water of 900 weight portions is added in dosing still, under agitation add the sun of 120 weight portions from
Sub-monomer solution property, then heats dosing still, under agitation adds
The acrylamide of 1200 weight portions, treats that it is completely dissolved and obtains preparing liquid, the temperature of whole process is 27 DEG C；
(2) regulation pH value: use calcium hydroxide to regulate the pH value of described preparation liquid to 9；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Sending out agent A hydrogen peroxide, its solute is that (concentration is the aqueous hydrogen peroxide solution of 2.5% to 30 weight portions, peroxidating
Aqueous solution of hydrogen is 1200 weight portions) and initiator B potassium sulfite 30 weight portion (being configured to concentration is 2.5%
Potassium sulfite aqueous solution, potassium sulfite aqueous solution is 1200 weight portions), then stand treat that implode is reacted, quick-fried
Poly-reaction obtains polymer expander after completing；
(4) post processing: finally polymer expander is carried out pelletize, dries and (gained drag reducer granule is inserted back
Turning percolation machine to be dried, temperature controls, at 95～100 DEG C, the most again drag reducer granule to be inserted vibratory liquefaction
Bed be dried, temperature controls at 75～80 DEG C), screening (will dry after drag reducer granule through 80 targets
Sieve screening), i.e. obtain described shale gas specific complex drag reducer.
The drag reducer white in appearance powder synthesized by the method, dissolution time 2～3 minutes, drag reducer
When concentration is 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 75%.
Embodiment 4
The present embodiment one shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: the water of 950 weight portions is added in dosing still, under agitation add the sun of 130 weight portions from
Sub-monomer methacrylic acid octyl group ethyl ester, then heats dosing still, under agitation adds 1300 weights
The acrylamide of amount part, treats that it is completely dissolved and obtains preparing liquid, the temperature of whole process is 40 DEG C；
(2) regulation pH value: use calcium hydroxide to regulate the pH value of described preparation liquid to 9.5；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Send out agent A Ammonium persulfate. 37.5 weight portion and (be configured to the ammonium persulfate aqueous solution that concentration is 3%, Ammonium persulfate. water
Solution is 1250 weight portions) and initiator B sodium sulfite 37.5 weight portion (be configured to the Asia that concentration is 3%
Aqueous sodium persulfate solution, sodium sulfite aqueous solution 1250 weight portion), then standing and treat that implode is reacted, implode is reacted
Polymer expander is obtained after completing；
(4) post processing: finally polymer expander is carried out pelletize, dries and (gained drag reducer granule is inserted back
Turning percolation machine to be dried, temperature controls, at 95～100 DEG C, the most again drag reducer granule to be inserted vibratory liquefaction
Bed be dried, temperature controls at 75～80 DEG C), screening (will dry after drag reducer granule through 80 targets
Sieve screening), i.e. obtain described shale gas specific complex drag reducer.
The drag reducer white in appearance powder synthesized by the method, dissolution time 2～3 minutes, drag reducer
When concentration is 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 80%.
Embodiment 5
The present embodiment one shale gas specific complex drag reducer, is prepared by following steps:
(1) dosing: the water of 875 weight portions is added in dosing still, under agitation adds the sun of 112.5 weight portions
Ion monomer butyl methacrylate, then heats dosing still, under agitation adds 1000 weight
The acrylamide of part, treats that it is completely dissolved and obtains preparing liquid, the temperature of whole process is 29 DEG C；
(2) regulation pH value: use calcium hydroxide to regulate the pH value of described preparation liquid to 8；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, is under agitation sequentially added in preparation liquid and draws
Send out agent A potassium peroxydisulfate 22 weight portion and (be configured to the ammonium persulfate aqueous solution that concentration is 2%, Ammonium persulfate. water
Solution is 1100 weight portions) and initiator B sodium sulfite 20 weight portion (be configured to the Asia that concentration is 2%
Sodium bisulphate solution, aqueous solution of sodium bisulfite is 1000 weight portions), then stand and treat that implode is reacted, quick-fried
Poly-reaction obtains polymer expander after completing；
(4) post processing: finally polymer expander is carried out pelletize, dries and (gained drag reducer granule is inserted back
Turning percolation machine to be dried, temperature controls, at 95～100 DEG C, the most again drag reducer granule to be inserted vibratory liquefaction
Bed be dried, temperature controls at 75～80 DEG C), screening (will dry after drag reducer granule through 80 targets
Sieve screening), i.e. obtain described shale gas specific complex drag reducer.
The drag reducer white in appearance powder synthesized by the method, dissolution time 2～3 minutes, drag reducer
When concentration is 0.1%, the drag reducing efficiency of this drag reducer reaches as high as 75%.
The shale gas specific complex drag reducer of the present invention, product heatproof, ageing-resistant, salt tolerant, and and pressure break
The various additive compatibilities of acidifying are good, and significant to oil gas field volume increase, described Dry-powder structural fluid subtracts
When resist produces synthesis, temperature is up to more than 150 DEG C, and is to complete in moment, and polymerization time is short, and reaction is flat
Surely, production efficiency is high, and properties of product are highly stable.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose arbitrary new method or the step of process or any
New combination.
Claims (10)
1. the preparation method of a shale gas specific complex drag reducer, it is characterised in that by following steps system
:
(1) dosing: 750～950 parts of water are added in dosing stills, under agitation add 90～130 parts of sun from
Sub-monomer, then heats dosing still, under agitation adds 700～1300 parts of acrylamides, treats it
Being completely dissolved and obtain preparing liquid, the temperature of whole process is not more than 40 DEG C；
(2) regulation pH value: regulate the pH value of described preparation liquid to 6.0～9.5；
(3) polymerization: step 2 gained configuration liquid is proceeded to reactor, under agitation adds successively in preparation liquid
Enter initiator A aqueous solution and initiator B aqueous solution, then stand and treat that implode is reacted, after implode has been reacted
Obtain polymer expander；
(4) post processing: polymer expander finally carries out pelletize, dries, sieve, i.e. obtains described dry
Powder type structural fluid drag reducer.
The preparation method of a kind of shale gas specific complex drag reducer the most according to claim 1, its feature
Being, described cationic monomer is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, octadecyldimethyl allyl
Ammonium chloride, methacrylic acid octyl group ethyl ester, butyl methacrylate, octadecyl acrylate, acrylic acid
Stearyl, trifluoroethyl methacrylate, Hexafluorobutyl mathacrylate, dimethylaminoethyl
One or more in ethyl ester, isocyanate ethyl methacrylate, described initiator A is peroxide,
Described initiator B is sulphite.
The preparation method of a kind of shale gas specific complex drag reducer the most according to claim 1 and 2, its
Being characterised by, in step (2), pH value adjusts and uses conventional basic materials to be adjusted, including hydroxide
Calcium, sodium hydroxide, potassium hydroxide；Regulation pH value is to 7～9.
The preparation method of a kind of shale gas specific complex drag reducer the most according to claim 1, its feature
Be, described initiator A be potassium peroxydisulfate, Ammonium persulfate., hydrogen peroxide one or more.
The preparation method of a kind of shale gas specific complex drag reducer the most according to claim 1, its feature
Be, described initiator B be sodium sulfite, sodium sulfite, potassium sulfite one or more.
The preparation method of a kind of shale gas specific complex drag reducer the most according to claim 1 and 2, its
Be characterised by, described each component in parts by weight: water 800～900 parts, cationic monomer 100～120 parts,
Acrylamide 800～1200 parts, initiator A 15～30 parts, initiator B 12～30 parts.
7. according to the preparation method of a kind of shale gas specific complex drag reducer described in claim 1 or 4, its
Being characterised by, the mass concentration of described initiator A aqueous solution is 1～3%.
A kind of preparation method of shale gas specific complex drag reducer, its
Being characterised by, the mass concentration of described initiator B aqueous solution is 1～3%.
9. according to the preparation method of a kind of shale gas specific complex drag reducer described in claim 4 or 5, its
Being characterised by, the mass concentration of described initiator A aqueous solution is 1.5～2.5%, described initiator B aqueous solution
Mass concentration be 1.5～2.5%.
10. utilize page prepared by the preparation method of a kind of shale gas specific complex drag reducer described in claim 1
Rock gas specific complex drag reducer.
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| CN106967196A (en) * | 2017-02-27 | 2017-07-21 | 西南石油大学 | A kind of high temperature resistant PAMC inhibitor and its preparation method and application |
| CN107236532A (en) * | 2017-06-19 | 2017-10-10 | 四川银宇化工科技有限公司 | A kind of New Clear Fracturing Fluid and preparation method thereof |
| CN107964399A (en) * | 2017-11-23 | 2018-04-27 | 北京捷贝通石油技术股份有限公司 | A kind of shale gas pressure break multifunctional nano lotion drag reducer and preparation method thereof |
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Cited By (9)
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