CN104194766B - Clean fracturing fluid and preparation method thereof - Google Patents
Clean fracturing fluid and preparation method thereof Download PDFInfo
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- CN104194766B CN104194766B CN201410465894.1A CN201410465894A CN104194766B CN 104194766 B CN104194766 B CN 104194766B CN 201410465894 A CN201410465894 A CN 201410465894A CN 104194766 B CN104194766 B CN 104194766B
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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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- C09K8/00—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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Abstract
The invention discloses a clean fracturing fluid which comprises crude rubber fluid, viscosity accelerant and gel breaker, the crude rubber fluid comprises the following materials by mass percent: 0.1%-0.5% of hydrophobic association polyacrylamide, 0.05%-0.2% of organic acid, 0.1%-0.8% of clay stabilizer and the balance of water; the viscosity accelerant comprises the following materials according to mass percent: 0.05%-0.4% of alkyl amine oxide, 0.1%-0.5% of Gemini surfactant, 0.1%-1.0% of alkyl lower alcohol, 0.05%-0.4% of pH regulator, and the balance of water; the volume ratio of the crude rubber fluid to the viscosity accelerant is 100:(5-10), and the mass of the gel breaker is 0.005%-0.05% that of the clean fracturing fluid. The invention further provides a preparation method of the clean fracturing fluid. The long-term technical problems of high cost and poor temperature resistance performance of the clean fracturing fluid are solved.
Description
Technical field
The invention belongs to technical field of petrochemical industry is and in particular to a kind of clean fracturing fluid and preparation method thereof.
Background technology
Pressure break is a kind of major measure of well production increment, intensified injection of wells.Fracturing fluid is divided into aqueous fracturing fluid, Oil Base Fracturing
Liquid, bubble last fracturing fluid and clean fracturing fluid etc..Water base guar gum fracturing fluid is hypotonic and super low percolation oilfield onsite application main pressure
Split working solution.Fracturing effect statistics shows：This fracturing fluid has that additive types are many, breaking glue solution residue big, stable yields week after pressure break
Phase is short, fracturing effect difference and the shortcomings of join liquid complex process.
VES cationic surfactant type clean fracturing fluid is a kind of fracturing fluid system of non-polymer, have no residue,
The good advantage of anti-clayswelling effect, it overcomes the shortcoming of guar gum fracturing fluid, is a revolutionary change of guar gum fracturing fluid technology
Leather is it is considered to be the top level of aqueous fracturing fluid technology.But its shortcoming is cation-adsorption and high cost (dosage 1.5%
～6%), temperature resistant capability low (≤70 DEG C), cause the popularization and application at the scene of this fracturing fluid and scale to be restricted.
The fracturing fluid of patent ZL201110374771.3 report is a kind of non-cationic surfactant type fracturing fluid.This pressure
Split liquid and overcome the injury that the absorption of VES cationic fracturing fluid causes, give broken glue displacement of reservoir oil effect simultaneously, be a kind of composite highly effective
Fracturing fluid system, but its shortcoming big, high cost that is (1) additive dosage；(2) fracturing fluid temperature tolerance poor (≤80 DEG C), therefore,
This fracturing fluid can not fully meet live pressing crack construction to fracturing fluid property requirement.
Reported for work a kind of association type hydrophobic group polymer fracturing fluid in Luoping Asia etc., be by being modified to acrylamide and
A kind of cross-linking type fracturing fluid system becoming.The great advantage of this fracturing fluid is that residue is low, and anti-shear performance is good, and heat resistance obtains
Significantly improve (less than 120 DEG C), but a disadvantage is that solid powdery thickening agent during liquid is joined at (1) scene and dissolving slow in water and easily go out
Existing " flake "；(2) after thickening agent dosage increases to 0.4%, virgin rubber fluid viscosity is more than 90mPa s, pump liquid during site operation
Difficult；(3) dosage is big, high cost.Above-mentioned deficiency limits its large-scale use.
Make a general survey of domestic and international fracturing fluid development, low cost, Low Damage, high temperature resistant and compound fracturing fluid remain and press from now on
Split the developing direction of working solution.
Content of the invention
The technical problem to be solved is, for above-mentioned the deficiencies in the prior art, to provide a kind of clean fracturing
Liquid.This clean fracturing fluid passes through rational proportion, not only avoids polymer fracturing fluid and surfactant fracturing fluid each performance
Defect, takes into account the combination of sciences that respective advantage achieves polymer fracturing fluid and surfactant fracturing fluid simultaneously, makes
Fracturing fluid property is significantly improved.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of clean fracturing fluid it is characterised in that
It is made up of original gelatin, adhesion promoters and gel breaker, described original gelatin is made up of the raw material of following mass percent：Hydrophobic association
Polyacrylamide 0.1%～0.5%, organic acid 0.05%～0.2%, clay stabilizer 0.1%～0.8%, balance of water；Institute
State adhesion promoters to be made up of the raw material of following mass percent：Alkyl amine oxide 0.05%～0.4%, Gemini surface activity
Agent 0.1%～0.5%, alkyl low-carbon alcohols 0.1%～1.0%, pH adjusting agent 0.05%～0.4%, balance of water；Described virgin rubber
The volume ratio of liquid and adhesion promoters is 100:(5～10), the quality of gel breaker be clean fracturing fluid quality 0.005%～
0.05%；Described organic acid is in mahogany acid, fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid
One or more, clay stabilizer is NH4Cl or KCl；Described alkyl low-carbon alcohols are methanol, butanol or amylalcohol, and pH adjusting agent is
Triethanolamine, diethanolamine, ethanolamine, NaOH, KOH, K2CO3、Na2CO3Or NaHCO3；Described gel breaker is Ammonium persulfate. or two
Chlorine monoxid.
A kind of above-mentioned clean fracturing fluid is it is characterised in that described original gelatin is made up of the raw material of following mass percent：
Hydrophobic association polyacrylamide 0.1%～0.3%, organic acid 0.05%～0.1%, clay stabilizer 0.2%～0.6%, remaining
Measure as water；Described adhesion promoters are made up of the raw material of following mass percent：Alkyl amine oxide 0.1%～0.3%, Gemini
Surfactant 0.2%～0.4%, alkyl low-carbon alcohols 0.3%～0.8%, pH adjusting agent 0.1%～0.3%, balance of water；
The quality of described gel breaker is the 0.03%～0.05% of clean fracturing fluid quality.
A kind of above-mentioned clean fracturing fluid is it is characterised in that described original gelatin is made up of the raw material of following mass percent：
Hydrophobic association polyacrylamide 0.2%, organic acid 0.08%, clay stabilizer 0.5%, balance of water；Described adhesion promoters
It is made up of the raw material of following mass percent：Alkyl amine oxide 0.15%, Gemini surface active 0.3%, alkyl low-carbon alcohols
0.5%, pH adjusting agent 0.15%, balance of water；The quality of described gel breaker is the 0.04% of clean fracturing fluid quality.
A kind of above-mentioned clean fracturing fluid is it is characterised in that described hydrophobic association polyacrylamide associates for FRAC-102
(furyk technology development in Beijing is public for thing thickening agent (oilfield technology company limited of Xi'an Cali), FRA-313 associated complex thickening agent
Department), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan Guangya Polymer Chemical Co., Ltd.), CGR-7 associated complex thickening
Agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.) or SXT102 pressure break are with thickening agent (Beijing Xitao Development Tech Co., Ltd.).
A kind of above-mentioned clean fracturing fluid is it is characterised in that described alkyl amine oxide aoxidizes for octadecyl dihydroxy ethyl
Amine, cetyl dihydroxy ethyl amine oxide, cetyl dimethyl amine oxide, octadecyl dimethyl amine oxide or stearamide
Propyl group amine oxide.
In addition, present invention also offers a kind of method preparing above-mentioned clean fracturing fluid is it is characterised in that the method includes
Following steps：
Step one, by hydrophobic association polyacrylamide, clay stabilizer, organic acid and water mix homogeneously, obtain original gelatin；
Step 2, by alkyl amine oxide, Gemini surface active, alkyl low-carbon alcohols and pH adjusting agent mix homogeneously, obtain
To adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stirring 1min～
5min, adds gel breaker, mix homogeneously in the mixture after stirring during construction, obtains clean fracturing fluid.
The clean fracturing fluid of the present invention conventionally carries proppant when using and pumps in oil well.
The present invention compared with prior art has advantages below：
1st, the clean fracturing fluid low production cost of the present invention, the little, excellent performance of injury, solve polymer fracturing fluid high temperature
Dosage is big, and the problem that liquid is difficult and using effect is poor is joined at scene；Improve surfactant type fracturing fluid temperature resistant capability, decrease and add
Amount, reduces fracturing fluid cost, solves the technical barrier such as clean fracturing fluid high cost, heat resistance difference for a long time.
2nd, the organic acid in the clean fracturing fluid of the present invention ensure that hydrophobic association polyacrylamide uses in high concentration
When, virgin rubber fluid viscosity is maintained at below 60mPa s, so that the pumpability of live pressing crack construction original gelatin, solves hydrophobic association
Conveying hardly possible problem and impact fracturing fluid matter that polymer fracturing fluid produces because virgin rubber fluid viscosity is excessive when high concentration uses
Amount problem；In addition, the salt that organic acid is combined rear generation with pH adjusting agent greatly improves the heat-resisting property of fracturing fluid, also can be with
Produce synergism between hydrophobic association polyacrylamide, improve the viscosity of fracturing fluid.
3rd, the organic acid in the clean fracturing fluid of the present invention has very strong complexing to calcium ion in water, alleviates hydrophobic
The problem of calcium ion hydraulic performance decline met by association polyacrylamide.
4th, the pH adjusting agent in the clean fracturing fluid of the present invention has not only neutralized organic acid, ensure that fracturing fluid in alkali simultaneously
(pH=8～9) plastic under property environment, improves the viscosity of fracturing fluid.
5th, produce between the Gemini surface active in the clean fracturing fluid of the present invention and hydrophobic association polyacrylamide
Synergy, not only reduces the concentration of polymer and surfactant, and so that the temperature tolerance of fracturing fluid and viscosity is obtained
To significantly improve.
6th, the clean fracturing fluid of the present invention relies on the degraded of oxidized form gel breaker to have the hydrophobic association polypropylene of certain viscosity
Amide, destroys, using crude oil, the micellar structure that surfactant is formed with hydrophobic association polyacrylamide, finally realizes fracturing fluid
Thoroughly break glue.
7th, the alkyl low-carbon alcohols in the clean fracturing fluid of the present invention are except increasing Gemini surface active dissolution dispersity
Outward, also have froth breaking effect concurrently simultaneously.
8th, the clean fracturing fluid of the present invention passes through rational proportion, not only avoids polymer fracturing fluid and surfactant pressure break
The defect of the respective performance of liquid, takes into account respective advantage simultaneously and achieves polymer fracturing fluid and surfactant fracturing fluid
Combination of sciences, makes fracturing fluid property be significantly improved.
With reference to the accompanying drawings and examples technical scheme is described in further detail.
Brief description
Fig. 1 is the shearing curve figure of the clean fracturing fluid of the embodiment of the present invention 1.
Fig. 2 is the shearing curve figure of the clean fracturing fluid of the embodiment of the present invention 3.
Fig. 3 is the shearing curve figure of the clean fracturing fluid of the embodiment of the present invention 5.
Specific embodiment
Embodiment 1
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.2%, organic acid 0.08%, clay stabilizer 0.5%, remaining
Measure as water；Described adhesion promoters are made up of the raw material of following mass percent：Cetyl dihydroxy ethyl amine oxide 0.15%,
Gemini surface active (Sulfonic Gemini Surfactants) 0.3%, alkyl low-carbon alcohols 0.5%, pH adjusting agent
0.15%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:8, the quality of gel breaker is clean fracturing
The 0.04% of liquid quality；Described hydrophobic association polyacrylamide is FRAC-102 associated complex thickening agent (purchased from Xi'an Cali oil field
Technology Co., Ltd.)；Described organic acid is mahogany acid, and described clay stabilizer is NH4Cl, described alkyl low-carbon alcohols are first
Alcohol, described pH adjusting agent is triethanolamine, and described gel breaker is Ammonium persulfate..
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by FRAC-102 associated complex thickening agent, clay stabilizer NH4Cl, organic acid mahogany acid and water mixing
Uniformly, obtain original gelatin；
Step 2, by the mixing of cetyl dihydroxy ethyl amine oxide, Gemini surface active, methanol and triethanolamine all
Even, obtain adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 5min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Fig. 1 is the shearing curve figure of the clean fracturing fluid of the present embodiment.It can be seen that the cleaning pressure of the present embodiment
Split liquid at 120 DEG C, 170s-1Viscosity >=40mPa s after lower continuous shear stress 80min.
Embodiment 2
The present embodiment is same as Example 1, and wherein difference is：Described hydrophobic association polyacrylamide is FRA-
313 associated complex thickening agents (Beijing furyk technology Development Co., Ltd), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan light
Sub- polymer Chemical Co., Ltd.), CGR-7 associated complex thickening agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.) or SXT102 pressure break
With thickening agent (Beijing Xitao Development Tech Co., Ltd.), described alkyl amine oxide is octadecyl dihydroxy ethyl amine oxide, ten
Six alkyl dimethyl amine oxides, octadecyl dimethyl amine oxide or stearamide propyl group amine oxide, described organic acid is fat
Alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid or sulfamic acid, or be mahogany acid, fatty alcohol sulphuric acid, ethylenediamine tetraacetic
In acetic acid, citric acid, oxalic acid and sulfamic acid at least two, described alkyl low-carbon alcohols are butanol or amylalcohol, and described clay is steady
Determining agent is KCl, and described pH adjusting agent is diethanolamine, ethanolamine, ammonia, NaOH, KOH, K2CO3、Na2CO3Or NaHCO3, described
Gel breaker is chlorine dioxide.
Embodiment 3
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.3%, organic acid 0.1%, clay stabilizer 0.6%, surplus
For water；Described adhesion promoters are made up of the raw material of following mass percent：Cetyl dimethyl amine oxide 0.1%,
Gemini surface active (Quaternary Ammonium Gemini Surfactants) 0.2%, alkyl low-carbon alcohols 0.8%, pH adjusting agent
0.3%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:5, the quality of gel breaker is clean fracturing fluid
The 0.03% of quality；Described hydrophobic association polyacrylamide is GRF-1 association type non-crosslinked fracturing fluid thickener (purchased from Sichuan light
Sub- polymer Chemical Co., Ltd.)；Described organic acid is mixture (mahogany acid and the fat of mahogany acid and fatty alcohol sulphuric acid
The mass ratio of alcohol sulphuric acid is 1:1), described alkyl low-carbon alcohols are amylalcohol, and described clay stabilizer is KCl, and described pH adjusting agent is
NaOH, described gel breaker is chlorine dioxide.
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by GRF-1 association type non-crosslinked fracturing fluid thickener, clay stabilizer KCl, mahogany acid, fatty alcohol
Sulphuric acid and water mix homogeneously, obtain original gelatin；
Step 2, by cetyl dimethyl amine oxide, Gemini surface active, amylalcohol and NaOH mix homogeneously, obtain
To adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 3min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Fig. 2 is the shearing curve figure of the clean fracturing fluid of the present embodiment.It can be seen that the cleaning pressure of the present embodiment
Split liquid at 110 DEG C, 170s-1Viscosity >=40mPa s after lower continuous shear stress 80min.
Embodiment 4
The present embodiment is same as Example 3, and wherein difference is：Described hydrophobic association polyacrylamide is FRAC-
102 associated complex thickening agents (oilfield technology company limited of Xi'an Cali), FRA-313 associated complex thickening agent (Beijing furyk technology
Development Co., Ltd), CGR-7 associated complex thickening agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.) or SXT102 pressure break thickening agent (north
Jing Xitao technological development company limited), described alkyl amine oxide is octadecyl dihydroxy ethyl amine oxide, cetyl dihydroxy second
Base amine oxide, octadecyl dimethyl amine oxide or stearamide propyl group amine oxide, described organic acid is mahogany acid, fatty alcohol
One of sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid or more than three kinds, or be fatty alcohol sulphuric acid, second
In ethylenediamine tetraacetic acid (EDTA), citric acid, oxalic acid and sulfamic acid two kinds, or be ethylenediaminetetraacetic acid, citric acid, oxalic acid and amino
One of sulfonic acid and mahogany acid, described alkyl low-carbon alcohols are methanol or butanol, and described clay stabilizer is NH4Cl, described
PH adjusting agent is triethanolamine, diethanolamine, ethanolamine, ammonia, KOH, K2CO3、Na2CO3Or NaHCO3, described gel breaker was
Ammonium sulfate.
Embodiment 5
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.1%, organic acid 0.05%, clay stabilizer 0.2%, remaining
Measure as water；Described adhesion promoters are made up of the raw material of following mass percent：Octadecyl dihydroxy ethyl amine oxide 0.3%,
Gemini surface active (polyethylene nonionic Gemini surface active) 0.4%, alkyl low-carbon alcohols 0.3%, pH regulator
Agent 0.1%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:10, the quality of gel breaker is cleaning pressure
Split the 0.05% of liquid quality；Described hydrophobic association polyacrylamide is FRA-313 associated complex thickening agent (purchased from Beijing furyk skill
Art Development Co., Ltd)；Described organic acid is that (mass ratio of mahogany acid and citric acid is 2 for the mixture of mahogany acid and citric acid:
1), described alkyl low-carbon alcohols are butanol, and described clay stabilizer is KCl, and described pH adjusting agent is ethanolamine, and described gel breaker is
Ammonium persulfate..
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by FRA-313 associated complex thickening agent, clay stabilizer KCl, mahogany acid, fatty alcohol sulphuric acid, citric acid
With water mix homogeneously, obtain original gelatin；
Step 2, by the mixing of octadecyl dihydroxy ethyl amine oxide, Gemini surface active, butanol and ethanolamine all
Even, obtain adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 1min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Fig. 3 is the shearing curve figure of the clean fracturing fluid of the present embodiment.It can be seen that the cleaning pressure of the present embodiment
Split liquid at 100 DEG C, 170s-1Viscosity >=40mPa s after lower continuous shear stress 80min.
Embodiment 6
The present embodiment is same as Example 5, and wherein difference is：Described hydrophobic association polyacrylamide is FRAC-
102 associated complex thickening agents (oilfield technology company limited of Xi'an Cali), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan
Guang Ya polymer Chemical Co., Ltd.), CGR-7 associated complex thickening agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.) or SXT102 pressure
Split with thickening agent (Beijing Xitao Development Tech Co., Ltd.), described alkyl amine oxide is cetyl dihydroxy ethyl amine oxide,
Cetyl dimethyl amine oxide, octadecyl dimethyl amine oxide or stearamide propyl group amine oxide, described organic acid is stone
One of oily sulfonic acid, fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid or more than three kinds, or be
In fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid two kinds, or be fatty alcohol sulphuric acid, ethylenediamine
The mixture of one of tetraacethyl, oxalic acid and sulfamic acid and mahogany acid, described alkyl low-carbon alcohols are methanol or amylalcohol, institute
Stating clay stabilizer is NH4Cl, described pH adjusting agent is triethanolamine, diethanolamine, ammonia, NaOH, KOH, K2CO3、Na2CO3
Or NaHCO3, described gel breaker is chlorine dioxide.
Embodiment 7
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.2%, organic acid 0.08%, clay stabilizer 0.5%, remaining
Measure as water；Described adhesion promoters are made up of the raw material of following mass percent：Octadecyl dimethyl amine oxide 0.15%,
Gemini surface active (Quaternary Ammonium Gemini Surfactants) 0.3%, alkyl low-carbon alcohols 0.5%, pH adjusting agent
0.15%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:10, the quality of gel breaker is clean fracturing
The 0.05% of liquid quality；Described hydrophobic association polyacrylamide is FRA-313 associated complex thickening agent (purchased from Beijing furyk technology
Development Co., Ltd)；Described organic acid is that (mass ratio of oxalic acid and sulfamic acid is 3 for the mixture of oxalic acid and sulfamic acid:1), institute
Stating alkyl low-carbon alcohols is methanol, and described clay stabilizer is NH4Cl, described pH adjusting agent is NaHCO3, described gel breaker is dioxy
Change chlorine.
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by FRA-313 associated complex thickening agent, clay stabilizer NH4Cl, oxalic acid, sulfamic acid and water mixing are all
Even, obtain original gelatin；
Step 2, by octadecyl dimethyl amine oxide, Gemini surface active, methanol and NaHCO3Mix homogeneously,
Obtain adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 1min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Embodiment 8
The present embodiment is same as Example 7, and wherein difference is：Described hydrophobic association polyacrylamide is FRAC-
102 associated complex thickening agents (oilfield technology company limited of Xi'an Cali), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan
Guang Ya polymer Chemical Co., Ltd.), CGR-7 associated complex thickening agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.) or SXT102 pressure
Split with thickening agent (Beijing Xitao Development Tech Co., Ltd.), described alkyl amine oxide is octadecyl dihydroxy ethyl amine oxide,
Cetyl dihydroxy ethyl amine oxide, cetyl dimethyl amine oxide or stearamide propyl group amine oxide, described organic acid is
One of mahogany acid, fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid or more than three kinds, or
For two kinds in mahogany acid, fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid and oxalic acid, or it is mahogany acid, fatty alcohol
The mixture of one of sulphuric acid, ethylenediaminetetraacetic acid and citric acid and sulfamic acid, described alkyl low-carbon alcohols are butanol or penta
Alcohol, described clay stabilizer be KCl, described pH adjusting agent be triethanolamine, diethanolamine, ethanolamine, ammonia, NaOH, KOH,
K2CO3Or Na2CO3, described gel breaker is Ammonium persulfate..
Embodiment 9
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.1%, organic acid 0.05%, clay stabilizer 0.1%, remaining
Measure as water；Described adhesion promoters are made up of the raw material of following mass percent：Stearamide propyl group amine oxide 0.05%,
Gemini surface active (carboxylic acid type Gemini surface active) 0.5%, alkyl low-carbon alcohols 0.1%, pH adjusting agent
0.05%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:5, the quality of gel breaker is clean fracturing
The 0.005% of liquid quality；Described hydrophobic association polyacrylamide is that SXT102 pressure break thickening agent (wishes great waves technology purchased from Beijing to open
Send out company limited)；Described organic acid is ethylenediaminetetraacetic acid, and described alkyl low-carbon alcohols are amylalcohol, and described clay stabilizer is
KCl, described pH adjusting agent is K2CO3, described gel breaker is Ammonium persulfate..
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by SXT102 pressure break thickening agent, clay stabilizer KCl, ethylenediaminetetraacetic acid and water mix homogeneously, obtain
To original gelatin；
Step 2, by stearamide propyl group amine oxide, Gemini surface active, amylalcohol and K2CO3Mix homogeneously, obtains
Adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 3min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Embodiment 10
The present embodiment is same as Example 9, and wherein difference is：Described hydrophobic association polyacrylamide is FRAC-
102 associated complex thickening agents (oilfield technology company limited of Xi'an Cali), FRA-313 associated complex thickening agent (Beijing furyk technology
Development Co., Ltd), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan Guangya Polymer Chemical Co., Ltd.) or CGR-7 forms
Compound thickening agent (Chengdu Jian Xiang Shu Guan Science and Technology Ltd.), described alkyl amine oxide be octadecyl dihydroxy ethyl amine oxide,
Cetyl dihydroxy ethyl amine oxide, cetyl dimethyl amine oxide or octadecyl dimethyl amine oxide, described organic acid
For mahogany acid, fatty alcohol sulphuric acid, citric acid, oxalic acid or sulfamic acid, or it is mahogany acid, fatty alcohol sulphuric acid, ethylenediamine
In tetraacethyl, citric acid, oxalic acid and sulfamic acid at least two, described alkyl low-carbon alcohols are methanol or butanol, described clay
Stabilizer is NH4Cl, described pH adjusting agent is triethanolamine, diethanolamine, ethanolamine, ammonia, NaOH, KOH, Na2CO3Or
NaHCO3, described gel breaker is chlorine dioxide.
Embodiment 11
The clean fracturing fluid of the present embodiment, is made up of original gelatin, adhesion promoters and gel breaker, and described original gelatin is by following
The raw material of mass percent is made：Hydrophobic association polyacrylamide 0.5%, organic acid 0.2%, clay stabilizer 0.8%, surplus
For water；Described adhesion promoters are made up of the raw material of following mass percent：Cetyl dimethyl amine oxide 0.4%,
Gemini surface active (Quaternary Ammonium Gemini Surfactants) 0.1%, alkyl low-carbon alcohols 1.0%, pH adjusting agent
0.4%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:7, the quality of gel breaker is clean fracturing fluid
The 0.01% of quality；Described hydrophobic association polyacrylamide is that CGR-7 associated complex thickening agent (has purchased from Jian Xiang another name for Sichuan Province, Chengdu hat science and technology
Limit company)；Described organic acid is the mixture (matter of mahogany acid and ethylenediaminetetraacetic acid of mahogany acid and ethylenediaminetetraacetic acid
Amount ratio is 1:3), described alkyl low-carbon alcohols are butanol, and described clay stabilizer is NH4Cl, described pH adjusting agent is KOH, described
Gel breaker is Ammonium persulfate..
The preparation method of the clean fracturing fluid of the present embodiment is：
Step one, by CGR-7 associated complex thickening agent, clay stabilizer NH4Cl, mahogany acid, oxalic acid, sulfamic acid and water
Mix homogeneously, obtains original gelatin；
Step 2, by cetyl dimethyl amine oxide, Gemini surface active, butanol and KOH mix homogeneously, obtain
Adhesion promoters；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 3min, apply
Man-hour adds gel breaker, mix homogeneously in the mixture after stirring, obtains clean fracturing fluid.
The clean fracturing fluid of the present embodiment conventionally carries proppant when using and pumps in oil well.
Embodiment 12
The present embodiment is identical with embodiment 11, and wherein difference is：Described hydrophobic association polyacrylamide is FRAC-
102 associated complex thickening agents (oilfield technology company limited of Xi'an Cali), FRA-313 associated complex thickening agent (Beijing furyk technology
Development Co., Ltd), GRF-1 association type non-crosslinked fracturing fluid thickener (Sichuan Guangya Polymer Chemical Co., Ltd.) or SXT102 pressure
Split with thickening agent (Beijing Xitao Development Tech Co., Ltd.), described alkyl amine oxide is octadecyl dihydroxy ethyl amine oxide,
Cetyl dihydroxy ethyl amine oxide, cetyl dimethyl amine oxide, octadecyl dimethyl amine oxide or stearamide third
Base amine oxide, described organic acid is in mahogany acid, fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid
One kind or more than three kinds, or for two kinds in fatty alcohol sulphuric acid, ethylenediaminetetraacetic acid, citric acid, oxalic acid and sulfamic acid,
Or for one of fatty alcohol sulphuric acid, citric acid, oxalic acid and sulfamic acid mixture with mahogany acid, described alkyl low-carbon (LC)
Alcohol is methanol or amylalcohol, and described clay stabilizer is KCl, and described pH adjusting agent is triethanolamine, diethanolamine, ethanolamine, ammonia
Water, NaOH, K2CO3、Na2CO3Or NaHCO3, described gel breaker is chlorine dioxide.
Fracturing fluid of the present invention and the performance comparison of VES fracturing fluid and polymer fracturing fluid：
Table 1 three types fracturing fluid property contrasts
As can be seen from Table 1, the clean fracturing fluid of the present invention is a kind of between VES clean fracturing fluid and polymer fracturing fluid
Between a kind of fracturing fluid system.It inherits two kinds of fracturing fluid advantages, avoids its shortcoming, has excellent performance.
In different time, glue is broken to the clean fracturing fluid of the present invention, after breaking gel almost without residue, viscosity after breaking gel is entered
Row detection, result see table.
Table 2 different time viscosity measurements result after breaking gel
From Table 2, it can be seen that in 80～100 DEG C of temperature, fracturing liquid rubber-breaking agent concentration is can when 0.03%～0.05%
Fracturing fluid is made to break glue completely in 4.0h, solution viscosity is very low after breaking gel, viscosity after breaking gel is less than 3.2mPa s, and surface is opened
Power is less than 28mN/m.
The residue contrast of the clean fracturing fluid of table 3 present invention and conventional guanidine gum fracturing fluid
| Fracturing fluid | Residue content ppm | Phenomenon |
| Guanidine gum fracturing fluid | 350 | Breaking glue solution has floccule |
| Clean fracturing fluid of the present invention | Almost without residue | Limpid bright |
From table 3 it is observed that the clean fracturing fluid of the present invention is almost without residue, limpid bright, belong to clean type pressure break
Liquid.
Using diameter 3.8cm, the artificial cores of length 7.6cm enter Mobile state injury test, compare the cleaning pressure of the present invention
Split liquid and the conventional injury to rock core for the guanidine gum fracturing fluid, the results are shown in Table 4.
The clean fracturing fluid of table 4 present invention and the comparison to core damage of conventional guanidine gum fracturing fluid
From table 3 it is observed that the fracturing fluid of the present invention is almost without residue, limpid bright, belong to clean type fracturing fluid.From
As can be seen that using diameter 3.8cm in table 4, the dynamic injury test that the artificial cores of length 7.6cm are carried out shows, the present invention
Clean fracturing fluid less to the permeability damage rate of rock core substrate, its averagely injury rate be 5.08%.And under equal conditions
The permeability damage rate recording guanidine gum fracturing fluid reaches 28.30%.It can be seen that, it is right that the clean fracturing fluid of the present invention can significantly reduce
The injury of rock core.
The above, be only presently preferred embodiments of the present invention, and not the present invention is done with any restriction, every according to invention skill
Any simple modification, change and equivalent structure change that art is substantially made to above example, all still fall within the technology of the present invention
In the protection domain of scheme.
Claims (4)
1. a kind of clean fracturing fluid is it is characterised in that be made up of original gelatin, adhesion promoters and gel breaker, described original gelatin by
The raw material of following mass percent is made：Hydrophobic association polyacrylamide 0.1%～0.5%, organic acid 0.05%～0.2%,
Clay stabilizer 0.1%～0.8%, balance of water；Described adhesion promoters are made up of the raw material of following mass percent：Alkyl
Amine oxide 0.05%～0.4%, Gemini surface active 0.1%～0.5%, alkyl low-carbon alcohols 0.1%～1.0%, pH adjusts
Section agent 0.05%～0.4%, balance of water；The volume ratio of described original gelatin and adhesion promoters is 100:5～100:10, broken glue
The quality of agent is the 0.005%～0.05% of clean fracturing fluid quality；Described organic acid is mahogany acid, fatty alcohol sulphuric acid, second
One or more of ethylenediamine tetraacetic acid (EDTA), citric acid, oxalic acid and sulfamic acid, clay stabilizer is NH4Cl or KCl；Described alkane
Base low-carbon alcohols are methanol, butanol or amylalcohol, and pH adjusting agent is triethanolamine, diethanolamine, ethanolamine, NaOH, KOH, K2CO3、
Na2CO3Or NaHCO3；Described gel breaker is Ammonium persulfate. or chlorine dioxide；Described hydrophobic association polyacrylamide is FRAC-102
Associated complex thickening agent, FRA-313 associated complex thickening agent, GRF-1 association type non-crosslinked fracturing fluid thickener, CGR-7 associated complex are thick
Agent or SXT102 pressure break thickening agent, wherein FRAC-102 associated complex thickening agent are purchased from the limited public affairs of Xi'an Cali oilfield technology
Department, FRA-313 associated complex thickening agent is purchased from Beijing furyk technology Development Co., Ltd, GRF-1 association type non-crosslinked fracturing fluid thickening
Agent is purchased from Sichuan Guangya Polymer Chemical Co., Ltd., and CGR-7 associated complex thickening agent is purchased from Jian Xiang another name for Sichuan Province, Chengdu and is preced with scientific and technological limited public affairs
Department, SXT102 pressure break is purchased from Beijing Xitao Development Tech Co., Ltd. with thickening agent；Described alkyl amine oxide is octadecyl two
Ethoxy amine oxide, cetyl dihydroxy ethyl amine oxide, cetyl dimethyl amine oxide, octadecyl dimethyl amine oxide
Or stearamide propyl group amine oxide；Described Gemini surface active is Sulfonic Gemini Surfactants, quaternary
Gemini surface active, polyethylene nonionic Gemini surface active or carboxylic acid type Gemini surface active.
2. a kind of clean fracturing fluid according to claim 1 is it is characterised in that described original gelatin is by following mass percent
Raw material make：Hydrophobic association polyacrylamide 0.1%～0.3%, organic acid 0.05%～0.1%, clay stabilizer 0.2%
～0.6%, balance of water；Described adhesion promoters are made up of the raw material of following mass percent：Alkyl amine oxide 0.1%～
0.3%, Gemini surface active 0.2%～0.4%, alkyl low-carbon alcohols 0.3%～0.8%, pH adjusting agent 0.1%～
0.3%, balance of water；The quality of described gel breaker is the 0.03%～0.05% of clean fracturing fluid quality.
3. a kind of clean fracturing fluid according to claim 2 is it is characterised in that described original gelatin is by following mass percent
Raw material make：Hydrophobic association polyacrylamide 0.2%, organic acid 0.08%, clay stabilizer 0.5%, balance of water；Described
Adhesion promoters are made up of the raw material of following mass percent：Alkyl amine oxide 0.15%, Gemini surface active 0.3%,
Alkyl low-carbon alcohols 0.5%, pH adjusting agent 0.15%, balance of water；The quality of described gel breaker is clean fracturing fluid quality
0.04%.
4. a kind of method preparing clean fracturing fluid as described in claim 1,2 or 3 it is characterised in that the method include following
Step：
Step one, by hydrophobic association polyacrylamide, clay stabilizer, organic acid and water mix homogeneously, obtain original gelatin；
Step 2, by alkyl amine oxide, Gemini surface active, alkyl low-carbon alcohols and pH adjusting agent mix homogeneously, glued
Degree accelerator；
Step 3, by adhesion promoters described in original gelatin described in step one and step 2 mix after stir 1min～5min,
Add gel breaker, mix homogeneously in the mixture after stirring during construction, obtain clean fracturing fluid.
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| CN104694114B (en) * | 2015-02-27 | 2018-10-16 | 中国石油天然气股份有限公司 | A kind of supermolecule clean fracturing fluid and the preparation method and application thereof |
| CN105273709A (en) * | 2015-11-24 | 2016-01-27 | 延长油田股份有限公司西区采油厂 | Clean crushing liquid system |
| CN106479476B (en) * | 2016-09-28 | 2019-05-10 | 西安石油大学 | A kind of clean fracturing fluid and preparation method thereof |
| CN106590612B (en) * | 2016-11-17 | 2019-10-01 | 新疆正通石油天然气股份有限公司 | It is crosslinked association polymer fracturing fluid low temperature gel breaker and preparation method and application method |
| CN106590611A (en) * | 2016-11-17 | 2017-04-26 | 新疆正通石油天然气股份有限公司 | Fracturing fluid of crosslinking association polymer and production method thereof |
| CN106905947A (en) * | 2017-02-08 | 2017-06-30 | 中国石油天然气股份有限公司 | A kind of displacement of reservoir oil fracturing fluid and preparation method and application |
| CN107868659A (en) * | 2017-11-07 | 2018-04-03 | 西南石油大学 | A kind of high temperature resistant association type fracturing fluid and preparation method thereof |
| CN110819331A (en) * | 2019-11-19 | 2020-02-21 | 西安石油大学 | Intelligent oil displacement agent capable of identifying oil and water and preparation method thereof |
| CN111909676B (en) * | 2020-07-29 | 2022-08-16 | 四川圣诺油气工程技术服务有限公司 | Plugging remover for oil pipe of sulfur-containing gas well and preparation method thereof |
| CN112322274B (en) * | 2020-11-27 | 2022-12-20 | 西安石油大学 | Preparation method of repeatable water-based fracturing fluid, gel breaker and application of gel breaker |
| CN112662388B (en) * | 2020-12-22 | 2023-03-21 | 西安石油大学 | Preparation method of oil displacement type water-based fracturing fluid |
| CN116004216B (en) * | 2023-03-23 | 2023-06-06 | 山东科兴化工有限责任公司 | Ammonium salt composite complexing agent for fracturing and preparation method thereof |
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| CN102666776A (en) * | 2009-08-31 | 2012-09-12 | 哈里伯顿能源服务公司 | Polymeric additives for enhancement of treatment fluids comprising viscoelastic surfactants and methods of use |
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