CN107674668A - A kind of high temperature aqueous-based fracturing fluid of clean type - Google Patents
A kind of high temperature aqueous-based fracturing fluid of clean type Download PDFInfo
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- CN107674668A CN107674668A CN201711101905.8A CN201711101905A CN107674668A CN 107674668 A CN107674668 A CN 107674668A CN 201711101905 A CN201711101905 A CN 201711101905A CN 107674668 A CN107674668 A CN 107674668A
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- fracturing fluid
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- high temperature
- polysaccharide
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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
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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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention provides a kind of high temperature aqueous-based fracturing fluid of clean type, including the component of following weight/mass percentage composition to be mixed：0.5% 6% clay stabilizer, 2% 6% accelerator, 0.01% 0.1% bactericide, 0.6% 3.0% low mass molecule alcohol, 0.4% 2% zwitterionic surfactant, 0% 0.5% compound of polysaccharide, remaining is water；For the high temperature aqueous-based fracturing fluid of clean type disclosed in this invention through Lab-evaluation, temperature resistant capability can reach more than 150 DEG C, better than in general clean fracturing liquid system；Glycine betaine dosage is 0.4% 2% (weight ratios), far below the dosage (2% 5%) of amphoteric surfactant in conventional pressure break formula of liquid；Using easy to operate, without crosslinking, it is good to hang sand ability, better than conventional crosslinking guanidine glue and quaternary ammonium salt system.
Description
Technical field
The present invention relates to petrol resources exploitation technical field, and in particular to a kind of high temperature aqueous-based fracturing fluid of clean type.
Background technology
Important means of the water conservancy fracturing technique as current oilfield stimulation, have been widely used, have particularly existed
The unconventionaloil pools such as the shale gas that receives much concern, coal bed gas exploitation field, has started a field technology revolution, fracturing fluid is in waterpower pressure
Split in construction, there is the important function transmitted pressure and carry proppant, be the key of hydraulic fracturing construction.
Such as modified guanidine glue of the thickener of currently used polyalcohol pressure liquid, modified cellulose, polypropylene aminoacyl amine
All be macromolecule polyalcohol, it is necessary to add cross-linking agents after use, into stratum after have quite a few cross-linked polymer not
Glue can be thoroughly broken, is remained in stratum and the crack of proppant, the permeability for the reduction proppant packing course that this will be seriously, so as to
Payzone is injured, causes pressing crack construction effect to be deteriorated, the discharge opeing of returning after pressing crack construction is analyzed and shows, even in low penetrability reservoir,
Only 35%~40% polymer can be returned and ejected.
Clean fracturing fluid has at home and abroad been applied at present, and its host is usually that quaternary ammonium salt or zwitterionic classes surface are lived
Property agent.By the way that surfactant is bar-shaped or the mutual winding of vermiform nano-micelle, the colloidal pressure with certain viscoelasticity is formed
Liquid is split, chance water meets oil broken glue automatically, and broken glue is thorough, small to formation damage, can effectively protect reservoir, and convenient with liquid,
It is adapted to untraditional well fracturing transformation, but such clean fracturing fluid temperature tolerance is bad, host dosage is big, causes cost high,
It is limited to promote the use of.
" a kind of clean fracturing fluid and preparation method thereof " of Sinopec Group's application, publication number：CN
105505370, a kind of clean fracturing liquid system of the disclosure of the invention and preparation method thereof, its fracturing fluid into being grouped into：Sun
Ionic surface active agent 3%-6%, zwitterionic surfactant 1%-4%, counter ion 0.5%-1.5%, electrolyte 2%-
5%, remaining is water.At present both at home and abroad conventional fracturing fluid mainly using natural natural plant gum, cellulose and synthetic polymer as
The aqueous fracturing fluid of thickening agent, but have residue by the aqueous fracturing fluid of crosslinked polymer, these residues will necessarily be to stratum
And filling bed causes Severe blockage its permeability is declined to a great extent, so as to greatly reduce the effect of pressure break.What the invention was related to
Fracturing fluid is made up of the surfactant of small molecule, and prop-carrying capacity is strong, without residue, right with water or oil broken glue, the easily row of returning automatically
Formation damage is small.The system weak point：Cationic surfactant and amphoteric surfactant dosage are too big.
" clean fracturing fluid " of PetroChina Company Ltd.'s application, publication number：CN 102643637, the hair
It is bright to propose a kind of preparation method of both sexes composite clean fracturing fluid, its fracturing fluid into being grouped into：Wrap by mass percentage
Include amphoteric surfactant 3%-5%, anion surfactant 0.5%-1%, inorganic salts 2%-4%, low mass molecule alcohol
0.3%-0.5%, pH value regulator 0%-5%, clay stabilizer 0.5%, remaining is water.Contain in amphoteric surfactant molecule
There are a cation and anionic hydrophilic base, the attraction between zwitterion promotes surfactant molecule to be closely spaced, in difference
The micelle gels of varying strength can be formed in salting liquid or acid solution under pH value, the excellent work of multiple performance can be prepared with it
Make liquid, it is not necessary to which crosslinking agent, gel breaker and other chemical addition agents, fracturing fluid residue content is almost nil, therefore hinders without stratum
Evil simultaneously can make filling bed keep good flow conductivity, can more effectively improve Oil ＆ Gas Productivity, sufficiently achieve well fracturing
Purpose.The system weak point：1. amphoteric surfactant dosage is big；2. system heat resistance is not outstanding enough, it is adapted to stratum
Oil-gas field fracturing of the temperature under the conditions of 60-80 DEG C.
A kind of " Shuangzi amphoteric viscoelastic surfactant and preparation method thereof and using it to be thick of Southwest Petrol University's application
The clean fracturing fluid of agent ", publication number：CN 106268496, the invention propose a kind of Shuangzi both sexes Viscoelastic surfactant
Agent and preparation method thereof and the clean fracturing fluid using it as thickening agent.It is simple, micro- that clean fracturing fluid materials are prepared using this method
Sight network structure is obvious, viscoplasticity is good, superior, the broken glue of outstanding grittiness is thorough.The biggest advantage of the surfactant is temperature tolerance
Good, when thickening agent dosage is 4.8%, the shear viscosity below 160 DEG C is not less than 130mPas；When thickening agent dosage is
When 1.8%, the shear viscosity below 120 DEG C is unstable in 140mPas or so.The weak point of the fracturing fluid：In formula
The concentration dosage of thickening agent is high.
A kind of " the New Clear Fracturing Fluid system " of Shaanxi seamount energy development Co., Ltd application, publication number：CN
106675544, the disclosure of the invention a kind of New Clear Fracturing Fluid, its component are：0.8%~1.5% thickening agent+water, should
Fracturing fluid viscosity is low, and elasticity is good, can effectively convey proppant, while reduce frictional resistance；Prepare simple, it is not necessary to crosslinking agent,
Gel breaker and other chemical addition agents；Without residue, supporting crack can keep good flow conductivity.The fracturing fluid weak point
For：1. the specific composition of thickening agent does not illustrate；2. the concentration dosage of thickening agent is high in formula；3. system at room temperature viscosity compared with
It is low, less than 20mPas.
The content of the invention
For the drawbacks described above and problem of prior art, the present invention provides a kind of high temperature aqueous-based fracturing fluid of clean type,
The technical problem of solution is：Solve the problems, such as the heat resistance deficiency of current clean fracturing fluid, it is met higher well temperature need
Will, while ensureing that fracturing fluid has good prop-carrying capacity, the dosage of fracturing fluid surfactant is reduced, reduces cost.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of high temperature aqueous-based fracturing fluid of clean type, including the component of following weight/mass percentage composition are mixed：0.5%-6%
Clay stabilizer, 2%-6% accelerator, 0.01%-0.1% bactericide, 0.6%-3.0% low mass molecule alcohol, 0.4%-
2% zwitterionic surfactant, 0%-0.5% compound of polysaccharide, remaining is water.
Compound method：The compound of polysaccharide solution of preparation 0.5%-1.0% concentration first, high-speed stirred 5min-10min,
Obtain homogeneous solution；Then clay stabilizer, accelerator, low mass molecule alcohol, bactericide, amphion surface-active are sequentially added
Agent and water, 3min-5min is stirred, that is, obtains the fracturing fluid with good viscoelasticity.
In above-mentioned technical proposal, the compound of polysaccharide is polyanion cellulose, sodium carboxymethylcellulose, ethoxy fibre
Tie up element, hydroxypropyl guar, modified xantham gum one or more mixture.
In above-mentioned technical proposal, the clay stabilizer is potassium chloride or ammonium chloride one or more mixture.
In above-mentioned technical proposal, the accelerator is sodium chloride, calcium chloride or magnesium chloride one or more mixture.
In above-mentioned technical proposal, the low mass molecule alcohol is isopropanol or ethanol one or two mixture.
In above-mentioned technical proposal, the bactericide is DTAC or the one or more mixing of glutaraldehyde
Thing.
In above-mentioned technical proposal, the amphion ionic surface active agent is a kind of alkyl amido betaine or several alkane
The mixture of base amide betaine.
The technical principle of the present invention：
Both sexes alkyl betaine surfactant of the present invention, there is viscoelasticity, in strong electrolytic solution, surface
The spherical micelle of activating agent is extruded by electrolyte, forms bar-shaped or vermiform nano-micelle so as to produce viscosity.In general,
The dosage of beet alkali surface activator is higher, and viscosity is bigger, and temperature tolerance is better, and solid-carrying performance is better.But high dosage can be direct
Fracturing fluid cost is caused drastically to raise.
Macromolecular polysaccharide polymer has good compatibility with glycine betaine fracturing fluid system, on the one hand, glycine betaine pressure break
After liquid system adds compound of polysaccharide, wound by the micella of glycine betaine by macromolecular polysaccharide compound so that fracturing fluid
Resistance to temp effect, which has, to be obviously improved, and hangs sand performance improvement；On the other hand, polar group is contained in par-tial polysaccharide compound molecule
Hydroxyl, carboxyl etc., the effect with the strong electrolyte such as the clay stabilizer in fracturing fluid, accelerator by Van der Waals force, molecule it
Between network structure strengthened, can be improved the viscosity of fracturing fluid system, so as to which effective part substitutes glycine betaine
Class surfactant, reduce use cost.
For the high temperature aqueous-based fracturing fluid of clean type disclosed in this invention through Lab-evaluation, temperature resistant capability can reach more than 150 DEG C,
Better than in general clean fracturing liquid system；Glycine betaine dosage is 0.4%-2% (weight ratio), far below in conventional pressure break formula of liquid
The dosage (2%-5%) of amphoteric surfactant；Using easy to operate, without crosslinking, it is good to hang sand ability, better than conventional friendship
Join guanidine glue and quaternary ammonium salt system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the viscosity-temperature curve of the embodiment of the present invention 1.
Fig. 2 is the viscosity-temperature curve of the embodiment of the present invention 2.
Fig. 3 is the viscosity-temperature curve of the embodiment of the present invention 3.
Fig. 4 is the viscosity-temperature curve of the embodiment of the present invention 4.
Embodiment
Below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described, it is clear that institute
The embodiment of description is only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair
The scope of bright protection.
The present invention is disclosed directly below a kind of high temperature aqueous-based fracturing fluid embodiment of clean type：
Embodiment 1：It is the mixed addition 908.5ml water in adjusting device of 1500ml in capacity, 5g Huangs is slowly added under stirring
Virgin rubber, high-speed stirred 5min；Then potassium chloride 10g, absolute ethyl alcohol 10g, glutaraldehyde solution 0.5g, calcium chloride 50g are sequentially added,
Erucyl amide hydroxysultaine 16g, 3min-5min is stirred, that is, obtain the aqueous fracturing fluid of the present invention.
The fracturing fluid viscosity-temperature characteristics of the present embodiment can be tested, pass through Brookfield PVS viscosimeter test samples
Rheological property, shear rate is in 170s-1After shearing 90min, the viscosity-temperature curve of embodiment 1 is obtained.
The fracturing fluid viscosity-temperature characteristics of the implementation case can be tested, and performance is as follows：Test temperature is at 150 DEG C, shear rate
For 170s-1, after 90 minutes, viscosity is still stablized in 32mPas.
Embodiment 2：It is the mixed addition 909.5ml water in adjusting device of 1500ml in capacity, 5g carboxylics is slowly added under stirring
Sodium carboxymethylcellulose pyce, high-speed stirred 5min；Then Klorvess Liquid 20g, absolute ethyl alcohol 9g, glutaraldehyde solution are sequentially added
0.5g, calcium chloride solution 50g, erucyl amide hydroxysultaine solution 6g, 3min-5min is stirred, that is, obtains the present invention
Aqueous fracturing fluid.
By the rheological property of Brookfield PVS viscosimeter test samples, shear rate is in 170s-1Shear 60min
Afterwards, the viscosity-temperature curve of embodiment 2 is obtained.
The fracturing fluid viscosity-temperature characteristics of the implementation case can be tested, and performance is as follows：Test temperature is at 130 DEG C, shear rate
For 170s-1, after a hour, viscosity is still stablized in 30.4mPas.
Embodiment 3：It is the mixed addition 908.5ml water in adjusting device of 1500ml in capacity, 5g Huangs is slowly added under stirring
Virgin rubber, high-speed stirred 5min；Then ammonium chloride solution 20g, isopropanol 10g, DTAC are sequentially added
0.5g, calcium chloride solution 50g, erucylamide CAB 6g, 3min-5min is stirred, that is, obtain the water base pressure of the present invention
Split liquid.
By the rheological property of Brookfield PVS viscosimeter test samples, shear rate is in 170s-1Shear 90min
Afterwards, viscosity-temperature curve Fig. 3 of embodiment 3 is obtained.
The fracturing fluid viscosity-temperature characteristics of the implementation case can be tested, and performance is as follows：Test temperature is at 140 DEG C, shear rate
For 170s-1, after 90 minutes, viscosity is so stable in 32mPas.
Embodiment 4：It is the mixed addition 904.5ml water in adjusting device of 1500ml in capacity, 5g hydroxyls is slowly added under stirring
Propyl guanidine glue, high-speed stirred 5min；Then ammonium chloride solution 20g, isopropanol 10g, trimethyl chlorination are sequentially added
Ammonium 0.5g, calcium chloride solution 50g, oleamide CAB 10g, 3min-5min is stirred, that is, obtain the water base pressure of the present invention
Split liquid.
By the rheological property of Brookfield PVS viscosimeter test samples, shear rate is in 170s-1Shear 90min
Afterwards, viscosity-temperature curve Fig. 4 of embodiment 4 is obtained.
The fracturing fluid viscosity-temperature characteristics of the implementation case can be tested, and performance is as follows：Test temperature is at 125 DEG C, shear rate
For 170s-1, after 90 minutes, viscosity stablization is in 26mPas.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (1)
- A kind of 1. high temperature aqueous-based fracturing fluid of clean type, it is characterised in that：Component including following weight/mass percentage composition is mixed： 0.5%-6% clay stabilizer, 2%-6% accelerator, 0.01%-0.1% bactericide, 0.6%-3.0% low molecule Alcohol, 0.4%-2% zwitterionic surfactant, 0%-0.5% compound of polysaccharide, remaining is water；Compound method：The compound of polysaccharide solution of 0.5%-1.0% concentration is prepared first, high-speed stirred 5min-10min, is obtained Homogeneous solution；Then sequentially add clay stabilizer, accelerator, low mass molecule alcohol, bactericide, zwitterionic surfactant and Water, 3min-5min is stirred, that is, obtains the fracturing fluid with good viscoelasticity；The compound of polysaccharide is polyanion cellulose, sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl guar, changed Property xanthans one or more mixture；The clay stabilizer is potassium chloride or ammonium chloride one or more mixture；The accelerator is sodium chloride, calcium chloride or magnesium chloride one or more mixture；The low mass molecule alcohol is isopropanol or ethanol one or two mixture；The bactericide is DTAC or glutaraldehyde one or more mixture；The amphion ionic surface active agent is the mixing of a kind of alkyl amido betaine or several alkyl amido betaines Thing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676552A (en) * | 2018-04-17 | 2018-10-19 | 四川申和新材料科技有限公司 | A kind of unconventional low temperature clean fracturing fluid and preparation method thereof |
| CN110373172A (en) * | 2019-06-21 | 2019-10-25 | 郭勇 | A kind of compound gel breaker |
| CN110452679A (en) * | 2019-08-23 | 2019-11-15 | 四川洁能锐思石油技术有限公司 | A kind of shale gas fracturing fluid and preparation method thereof |
| CN111073626A (en) * | 2019-12-30 | 2020-04-28 | 陕西省石油化工研究设计院 | Clean fracturing fluid for low-permeability, high-temperature-resistant and high-pressure-resistant reservoir and preparation method thereof |
| CN112979115A (en) * | 2021-04-27 | 2021-06-18 | 湖北亮绿环保技术有限公司 | Rapid gel breaker for treating xanthan gum system oil sludge emulsion and preparation method and application thereof |
| CN115322762A (en) * | 2022-08-10 | 2022-11-11 | 中石化石油工程技术服务有限公司 | Shear-recoverable drilling plug fluid and preparation method thereof |
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