CN107760295A - A kind of small molecule is recycled fracturing fluid and its application method - Google Patents
A kind of small molecule is recycled fracturing fluid and its application method Download PDFInfo
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- CN107760295A CN107760295A CN201711089655.0A CN201711089655A CN107760295A CN 107760295 A CN107760295 A CN 107760295A CN 201711089655 A CN201711089655 A CN 201711089655A CN 107760295 A CN107760295 A CN 107760295A
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- 239000012530 fluid Substances 0.000 title claims abstract description 76
- 150000003384 small molecules Chemical class 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 17
- 239000002562 thickening agent Substances 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000010276 construction Methods 0.000 claims abstract description 23
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 230000001351 cycling effect Effects 0.000 claims abstract description 7
- 230000003252 repetitive effect Effects 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims description 26
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims description 19
- 239000004576 sand Substances 0.000 claims description 17
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 11
- KUNNUNBSGQSGDY-UHFFFAOYSA-N 2-butyl-6-methylphenol Chemical class CCCCC1=CC=CC(C)=C1O KUNNUNBSGQSGDY-UHFFFAOYSA-N 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- 230000031709 bromination Effects 0.000 claims description 5
- 238000005893 bromination reaction Methods 0.000 claims description 5
- XQSBLCWFZRTIEO-UHFFFAOYSA-N hexadecan-1-amine;hydrobromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[NH3+] XQSBLCWFZRTIEO-UHFFFAOYSA-N 0.000 claims description 5
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 125000005207 tetraalkylammonium group Chemical group 0.000 claims 1
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 abstract description 18
- 239000003292 glue Substances 0.000 abstract description 15
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 abstract description 9
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 20
- AHNISXOXSNAHBZ-UHFFFAOYSA-M tetrakis-decylazanium;bromide Chemical compound [Br-].CCCCCCCCCC[N+](CCCCCCCCCC)(CCCCCCCCCC)CCCCCCCCCC AHNISXOXSNAHBZ-UHFFFAOYSA-M 0.000 description 6
- 230000035699 permeability Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The present invention relates to a kind of small molecule to be recycled fracturing fluid, it is characterized in that：The fracturing fluid is that 97 98% clear water and the thickeners of 2 3%MY 60 form by mass percent；It is that 97 98% Klorvess Liquids and the thickeners of 2 3%MY 60 form either by mass percent, wherein, the mass percent concentration of Klorvess Liquid is 1 5%.The repeated recycling utilize that itself broken glue backflow waste liquid and the broken glue of guanidine glue and polymer fracturing fluid return discharge opeing can be achieved in the present invention, and repetitive cycling construction is up to 35 times.
Description
Technical field
The present invention relates to the fracture technology field of natural gas pool, shale gas reservoir and oil reservoir development, is exactly one
Kind is recycled fracturing fluid and its application method for the small molecule of low permeability reservoirs individual well or fractured horizontal well.
Background technology
Pressure break is to develop an important technical of low permeability reservoirs, has formd more ripe and perfect pressure at present
Split liquid system, i.e. guanidine gum fracturing fluid system, polymer fracturing fluid, surfactant fracturing fluid system etc..Guanidine gum fracturing fluid system
It is simple, cost is relatively low because it has preferable solid-carrying performance, at present using relatively broad.But guanidine gum fracturing fluid system is residual
Liquid faces numerous technologies and Cost Problems in terms of fracturing fluid reuse is used as again.First, it is higher to recycle cost,
It returns other links that can be only reused after discharge opeing is handled as clear water in fracturing work, it is impossible to be used in sand fracturing is constructed.
For guanidine gum fracturing fluid once broken glue, recycling can not be thickened again without adding guanidine glue thickener and inorganic agent again by returning discharge opeing,
Polymer fracturing fluid there is also it is same the problem of；Secondly, the residue for returning discharge opeing has obvious injury to reservoir.And used at present
Surfactant-based fracturing fluid system, it takes sand by elasticity, and viscosity is relatively low, and residue is small, though obtained scale
Using, but price is universal higher, moreover, discharge opeing is returned after pressure can only also regard clear water, part is reused, and reuses effect
Difference；Current existing fracturing fluid can not use the broken glue of other fracturing fluids to return discharge opeing and carry out secondary or multiple pressing crack construction.It is comprehensive
For conjunction, it is contemplated that cost and technical factor, there is presently no occur ensure fracturing transformation effect, repeat can be recycled, with
And the fracturing fluid technical system to be got both simultaneously with environmental protection.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of small molecule to be recycled fracturing fluid and its use
Repeatable the recycling of method, on the one hand itself broken glue backflow waste liquid of the fracturing fluid, on the other hand, the thickening of the fracturing fluid
The broken glue that guanidine glue and polymer fracturing fluid can be used directly in agent returns the secondary thickening of discharge opeing and carries out taking sand pressure break, solves other fracturing fluids
Return discharge opeing waste liquid recycling problem.The fracturing fluid is applied to low permeability reservoirs individual well or fractured horizontal well.
Technical scheme：A kind of small molecule is recycled fracturing fluid, it is characterized in that：The fracturing fluid is by quality percentage
Number forms for 97-98% clear water and 2-3%MY-60 thickeners；It is 97-98% Klorvess Liquids and 2- either by mass percent
3%MY-60 thickeners form, wherein, the mass percent concentration of Klorvess Liquid is 1-5%.
The MY-60 thickeners are made up of following components by following mass percent：25-30% colophony-based sulphonate
Type Gemini surface active agent, 18-24% Tetra-n-decylammonium bromide or pentadecyl bromination ammonium or cetyl ammonium bromide, 8-12%
6- butyl o-cresols, 20-25% isopropanol and 9-15% clear water；Wherein, colophony-based sulphonate type gemini surfactant
Molecular formula be：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 1-5 integer.
The fracturing fluid is in temperature 60 C and shear rate 170S-1Bar part under, viscosity is more than 20mPas.
The MY-60 thickeners are liquid, and viscosity is less than 50mPa.s under normal temperature.
A kind of described small molecule is recycled the application method of fracturing fluid, it is characterized in that：Comprise the following steps that：
The first step：The MY-60 thickeners of formula ratio are passed through fracturing blender truck；
Second step：The Klorvess Liquid that the mass percent concentration of the clear water of formula ratio or formula ratio is 1-5% is passed through mulling again
MY-60 thickeners in Che Zhong, with fracturing blender truck are mixed to form small molecule and are recycled fracturing fluid；
3rd step：Carry out sand fracturing operation；
4th step：Fracturing work adds sand to control open flow after crack closure after terminating；
5th step：The construction of this fracturing work terminates；
6th step：After the construction of this fracturing work terminates, the waste liquid that row is returned from shaft bottom is collected again, is discharged into after settling sand removing
Fluid reservoir stores；
7th step：In next pressing crack construction, MY-60 thickeners are pumped into fracturing blender truck, then the backflow waste liquid that fluid reservoir is stored
It is passed through fracturing blender truck and is mixed to form working fracturing fluid again with the MY-60 thickeners in fracturing blender truck, wherein, MY-60 thickeners
Mass percent be 2-3%, the mass percent of backflow waste liquid is 97-98%；The step of repeat step three to six, such repetitive cycling
Construction is no more than 5 times.
The viscosity recovery for forming working fracturing fluid again is to more than 20mPas, again to next fracturing reform
Target carries out fracturing reform construction.
It is an advantage of the invention that：The small molecule of the present invention is recycled the environmentally friendly pressure break that fracturing fluid is a kind of reusable edible
Liquid, compared with prior art, the weight that itself broken glue backflow waste liquid and the broken glue of guanidine glue and polymer fracturing fluid return discharge opeing can be achieved
Recycle again, repetitive cycling construction is up to 3-5 times.The advantages of MY-60 thickeners, is lived using sulphonate type gemini surface
Property agent and other functional form surfactant compounds, under the concentration conditions of relatively low thickener, you can reach and preferably take sand
Viscosity, and the thickener can increase to plant gum fracturing fluid and other surfactant-based and polymerization species fracturing liquid rubber-breaking liquid
It is thick, improve fracturing waste liquor utilization rate.
Embodiment
Embodiment 1
It is that 97-98% clear water and 2-3%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；Or
Person is that 97-98% Klorvess Liquids and 2-3%MY-60 thickeners form by mass percent, wherein, the quality of Klorvess Liquid
Percent concentration is 1-5%.
The MY-60 thickeners are made up of following components by following mass percent：25-30% colophony-based sulphonate
Type Gemini surface active agent, 18-24% Tetra-n-decylammonium bromide or pentadecyl bromination ammonium or cetyl ammonium bromide, 8-12%
6- butyl o-cresols, 20-25% isopropanol and 9-15% clear water；Wherein, colophony-based sulphonate type gemini surfactant
Molecular formula be：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 1-5 integer.
The small molecule is recycled the application method of fracturing fluid, comprises the following steps that：
The first step：The MY-60 thickeners of formula ratio are passed through fracturing blender truck；
Second step：The Klorvess Liquid that the mass percent concentration of the clear water of formula ratio or formula ratio is 1-5% is passed through mulling again
MY-60 thickeners in Che Zhong, with fracturing blender truck are mixed to form small molecule and are recycled fracturing fluid；
3rd step：Carry out sand fracturing operation；
4th step：Fracturing work adds sand to control open flow after crack closure after terminating；
5th step：The construction of this fracturing work terminates；
6th step：After the construction of this fracturing work terminates, the waste liquid that row is returned from shaft bottom is collected again, is discharged into after settling sand removing
Fluid reservoir stores；
7th step：In next pressing crack construction, MY-60 thickeners are pumped into fracturing blender truck, then the backflow waste liquid that fluid reservoir is stored
It is passed through fracturing blender truck and is mixed to form working fracturing fluid again with the MY-60 thickeners in fracturing blender truck, wherein, MY-60 thickeners
Mass percent be 2-3%, the mass percent of backflow waste liquid is 97-98%；The step of repeat step three to six, such repetitive cycling
Construction is no more than 5 times.
Embodiment 2
It is that 97% clear water and 3%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；The MY-
60 thickeners are made up of following components by following mass percent：25% colophony-based sulphonate type gemini surfactant,
24% Tetra-n-decylammonium bromide, 12% 6- butyl o-cresols, 25% isopropanol and 14% clear water；Wherein, abietyl sulfonic acid
The molecular formula of salt form Gemini surface active agent is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n 1.
The small molecule is recycled the application method of fracturing fluid, comprises the following steps that：
The first step：The MY-60 thickeners of formula ratio are passed through fracturing blender truck；
Second step：The clear water of formula ratio is passed through in fracturing blender truck again, small molecule is mixed to form with the MY-60 thickeners in fracturing blender truck
Recyclable fracturing fluid；
3rd step：Carry out sand fracturing operation；
4th step：Fracturing work adds sand to control open flow after crack closure after terminating；
5th step：The construction of this fracturing work terminates；
6th step：After the construction of this fracturing work terminates, the waste liquid that row is returned from shaft bottom is collected again, is discharged into after settling sand removing
Fluid reservoir stores；
7th step：In next pressing crack construction, MY-60 thickeners are pumped into fracturing blender truck, then the backflow waste liquid that fluid reservoir is stored
It is passed through fracturing blender truck and is mixed to form working fracturing fluid again with the MY-60 thickeners in fracturing blender truck, wherein, MY-60 thickeners
Mass percent be 2-3%, the mass percent of backflow waste liquid is 97-98%；The step of repeat step three to six, such repetitive cycling
Construction is no more than 5 times.
Embodiment 3
It is that 98% clear water and 2%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；The MY-
60 thickeners are made up of following components by following mass percent：30% colophony-based sulphonate type gemini surfactant,
23% Tetra-n-decylammonium bromide, 8% 6- butyl o-cresols, 24% isopropanol and 15% clear water；Wherein, colophony-based sulphonate
The molecular formula of type Gemini surface active agent is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 3 integer.
Application method is the same as embodiment 2.
Embodiment 4
It is that 97.5% clear water and 2.5%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；Institute
MY-60 thickeners are stated to be made up of by following mass percent following components：30% colophony-based sulphonate type gemini surface-active
Agent, 18% Tetra-n-decylammonium bromide, 12% 6- butyl o-cresols, 25% isopropanol and 15% clear water；Wherein, abietyl sulphur
The molecular formula of hydrochlorate type Gemini surface active agent is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 5 integer.
Application method is the same as embodiment 2.
Embodiment 5
It is that 97.5% clear water and 2.5%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；Institute
MY-60 thickeners are stated to be made up of by following mass percent following components：29% colophony-based sulphonate type gemini surface-active
Agent, 23% cetyl ammonium bromide, 11% 6- butyl o-cresols, 25% isopropanol and 12% clear water；Wherein, abietyl sulphur
The molecular formula of hydrochlorate type Gemini surface active agent is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 5 integer.
Application method is the same as embodiment 2.
Embodiment 6
It is that 97.5% clear water and 2.5%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent,；Institute
MY-60 thickeners are stated to be made up of by following mass percent following components：30% colophony-based sulphonate type gemini surface-active
Agent, 24% pentadecyl bromination ammonium, 12% 6- butyl o-cresols, 25% isopropanol and 9% clear water；Wherein, abietyl sulphur
The molecular formula of hydrochlorate type Gemini surface active agent is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 4 integer.
Application method is the same as embodiment 2.
Embodiment 7
It is that 97% Klorvess Liquid and 3%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent, its
In, the mass percent concentration of Klorvess Liquid is 1%；The MY-60 thickeners are by following mass percent by following components
Composition：30% colophony-based sulphonate type gemini surfactant, 24% pentadecyl bromination ammonium, 12% 6- tert-butyl o first
Phenol, 25% isopropanol and 9% clear water；Wherein, the molecular formula of colophony-based sulphonate type gemini surfactant is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 2 integer.
It is essentially identical with the application method of embodiment 2, it is a difference in that：Second step：It is again that the mass percent of formula ratio is dense
Spend and be passed through for 1% Klorvess Liquid in fracturing blender truck, the recyclable pressure of small molecule is mixed to form with the MY-60 thickeners in fracturing blender truck
Split liquid.
Embodiment 8
It is that 98% Klorvess Liquid and 2%MY-60 thickeners form that a kind of small molecule, which is recycled fracturing fluid by mass percent, its
In, the mass percent concentration of Klorvess Liquid is 5%；The MY-60 thickeners are by following mass percent by following components
Composition：30% colophony-based sulphonate type gemini surfactant, 24% Tetra-n-decylammonium bromide, 12% 6- tert-butyl o first
Phenol, 20% isopropanol and 14% clear water；Wherein, the molecular formula of colophony-based sulphonate type gemini surfactant is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 1 integer.
It is essentially identical with the application method of embodiment 7, it is a difference in that：Second step：It is again that the mass percent of formula ratio is dense
Spend and be passed through for 5% Klorvess Liquid in fracturing blender truck, the recyclable pressure of small molecule is mixed to form with the MY-60 thickeners in fracturing blender truck
Split liquid.
Embodiment 9
It by mass percent is 97.5% Klorvess Liquid and 2.5%MY-60 thickener groups that a kind of small molecule, which is recycled fracturing fluid to be,
Into, wherein, the mass percent concentration of Klorvess Liquid is 3%；The MY-60 thickeners are by following quality by following components
Percentage forms：30% colophony-based sulphonate type gemini surfactant, 24% cetyl ammonium bromide, the tertiary fourths of 12% 6-
Base orthoresol, 20% isopropanol and 14% clear water；Wherein, the molecular formula of colophony-based sulphonate type gemini surfactant is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 3 integer.
It is essentially identical with the application method of embodiment 7, it is a difference in that：Second step：It is again that the mass percent of formula ratio is dense
Spend and be passed through for 3% Klorvess Liquid in fracturing blender truck, the recyclable pressure of small molecule is mixed to form with the MY-60 thickeners in fracturing blender truck
Split liquid.
Above-described embodiment 1-9 small molecule is recycled fracturing fluid in temperature 60 C and shear rate 170S-1Bar part
Under, its viscosity is all higher than 20mPas.
It is liquid that above-described embodiment 1-9 small molecule, which is recycled MY-60 thickeners described in fracturing fluid, and viscosity is small under normal temperature
In 50mPa.s.Normal temperature is generally 25 degree.
Above-described embodiment 1-9 small molecule is recycled described in the application method of fracturing fluid and forms working pressure break again
The viscosity recovery of liquid carries out fracturing reform construction to next fracturing reform target again to more than 20mPas.And then complete pressure
Split the recycling of liquid.
The chemical reagent that small molecule in above-described embodiment is recycled involved by fracturing fluid can be bought from market.
Compared with prior art, on the one hand the repeatable circulation of itself broken glue backflow waste liquid of the fracturing fluid is sharp by the present invention
With on the other hand, guanidine glue can be used directly for the thickener of the fracturing fluid and the broken glue of polymer fracturing fluid returns the secondary thickening of discharge opeing
Carry out taking sand pressure break, solve the problems, such as other fracturing fluids returns discharge opeing waste liquid recycling.Repetitive cycling construction is up to 3-5 times.The pressure
Split liquid and be applied to low permeability reservoirs individual well or fractured horizontal well.
Claims (6)
1. a kind of small molecule is recycled fracturing fluid, it is characterized in that：It by mass percent is 97-98% clear water and 2- that the fracturing fluid, which is,
3%MY-60 thickeners form；It is that 97-98% Klorvess Liquids and 2-3%MY-60 thickeners form either by mass percent,
Wherein, the mass percent concentration of Klorvess Liquid is 1-5%.
2. a kind of small molecule according to claim 1 is recycled fracturing fluid, it is characterized in that：The MY-60 thickeners be by
Following components are formed by following mass percent：25-30% colophony-based sulphonate type gemini surfactant, the ten of 18-24%
Tetraalkyl ammonium bromide or pentadecyl bromination ammonium or cetyl ammonium bromide, 8-12% 6- butyl o-cresols, 20-25% it is different
Propyl alcohol and 9-15% clear water；Wherein, the molecular formula of colophony-based sulphonate type gemini surfactant is：
NaO3SCH2CH2N(CH2R)(CH2CH2)nN(CH2R)CH2CH2SO3Na
R is C19H28CONH2, n is 1-5 integer.
3. a kind of small molecule according to claim 1 or 2 is recycled fracturing fluid, it is characterized in that：The fracturing fluid is in temperature 60
DEG C and shear rate 170S-1Bar part under, viscosity is more than 20mPas.
4. a kind of small molecule according to claim 1 or 2 is recycled fracturing fluid, it is characterized in that：The MY-60 thickeners are
Liquid, viscosity is less than 50mPa.s under normal temperature.
5. a kind of small molecule described in any one in claim 1-4 is recycled the application method of fracturing fluid, it is special
Sign is：Comprise the following steps that：
The first step：The MY-60 thickeners of formula ratio are passed through fracturing blender truck；
Second step：The Klorvess Liquid that the mass percent concentration of the clear water of formula ratio or formula ratio is 1-5% is passed through mulling again
MY-60 thickeners in Che Zhong, with fracturing blender truck are mixed to form small molecule and are recycled fracturing fluid；
3rd step：Carry out sand fracturing operation；
4th step：Fracturing work adds sand to control open flow after crack closure after terminating；
5th step：The construction of this fracturing work terminates；
6th step：After the construction of this fracturing work terminates, the waste liquid that row is returned from shaft bottom is collected again, is discharged into after settling sand removing
Fluid reservoir stores；
7th step：In next pressing crack construction, MY-60 thickeners are pumped into fracturing blender truck, then the backflow waste liquid that fluid reservoir is stored
It is passed through fracturing blender truck and is mixed to form working fracturing fluid again with the MY-60 thickeners in fracturing blender truck, wherein, MY-60 thickeners
Mass percent be 2-3%, the mass percent of backflow waste liquid is 97-98%；The step of repeat step three to six, such repetitive cycling
Construction is no more than 5 times.
6. the application method of fracturing fluid is recycled according to a kind of small molecule described in claim 5, it is characterized in that：The formation
The viscosity recovery of working fracturing fluid carries out fracturing reform to next fracturing reform target again to more than 20mPas again
Construction.
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