CN103881686B - Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof - Google Patents
Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof Download PDFInfo
- Publication number
- CN103881686B CN103881686B CN201410087997.9A CN201410087997A CN103881686B CN 103881686 B CN103881686 B CN 103881686B CN 201410087997 A CN201410087997 A CN 201410087997A CN 103881686 B CN103881686 B CN 103881686B
- Authority
- CN
- China
- Prior art keywords
- fracturing fluid
- weight portion
- xanthan gum
- low
- viscosity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
-
- 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
- C09K8/665—Compositions based on water or polar solvents containing inorganic 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
- C09K8/84—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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/24—Bacteria or enzyme containing gel breakers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
Abstract
The invention relates to a low-viscosity and high-elasticity non-crosslinking fracturing fluid which comprises the following components: 0.15-2.0 parts by weight of thickening agent, 0.02-2.0 parts by weight of gel breaker and 100 parts by weight of water, wherein the thickening agent is one or more than one of a xanthan gum esterification derivative, a xanthan gum hydroxypropylation derivative and a xanthan gum carboxymethylation derivative. The invention further provides a preparation method of the low-viscosity and high-elasticity non-crosslinking fracturing fluid. The low-viscosity and high-elasticity non-crosslinking fracturing fluid has the advantages of high viscosity, high dissolving speed, temperature resistance, shearing resistance, and salt resistance, and can be easily broken; and the low-viscosity and high-elasticity non-crosslinking fracturing fluid is a novel fracturing liquid which is low in price, easy to obtain, and easy to operate, and can be used in all phases of fracturing construction. The instant dissolving characteristic of the low-viscosity and high-elasticity non-crosslinking fracturing fluid is especially suitable for online liquid preparation, and the fracturing factorized operation is favorably realized.
Description
Technical field
The present invention relates to a kind of low viscous high-elastic non-crosslinked fracturing fluid and preparation method thereof, belong to technical field of petroleum extraction.
Background technology
Going deep into Reservoir Development, middle and low permeable reservoir is increasing, and fracturing is transformation oil and gas reservoir, acquisition
The effective ways of industrial production capacity.In pressing crack construction process, the quality of fracturing fluid property is directly connected to the success or failure of pressing crack construction
With effect of increasing production after pressure.
At present, due to easy to use, stable performance, aqueous fracturing fluid is still the main body of fracturing fluid, aqueous fracturing fluid thickening
Agent mostly is plant gum.High with plant gum price, plant gum is as the cost more and more higher of thickening agent, and plant gum has salt tolerant
The shortcomings of property is not good, reservoir damage is larger.Xanthan gum is a kind of biology cheap and easy to get, function admirable being capable of substituted plant glue
Polysaccharide thickening agent, but xanthan gum is easily degraded at high temperature, as fracturing fluid gelatinizer meeting when high temperature well pressure break uses
Lead to the not enough problem of prop-carrying capacity.
Content of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it is
With the modification derivant of xanthan gum as thickening agent, this fracturing fluid has high viscosity, instant, heatproof, resistant to shearing, salt tolerant, fragile glue
Advantage.
For reaching above-mentioned purpose, the invention provides a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component group
Become：Thickening agent 0.15-2.0 weight portion, gel breaker 0.02-2.0 weight portion, water 100 weight portion；Wherein, described thickening agent is Huang
The group of one or more of virgin rubber esterification derivative, xanthan gum hydroxypropylation derivant and xanthan gum carboxyl methylation derivant etc.
Close.Above-mentioned thickening agent can be that the xanthan gum esterification being produced by Wanke Petroleum ＆ Natural-Gas Technical Engineering Co., Ltd., Langfang City is derivative
Thing HYJ-1, xanthan gum hydroxypropylation derivant HYJ-2 and xanthan gum carboxyl methylation derivant HYJ-3.
It is preferable that above-mentioned xanthan gum esterification derivative is by following step in above-mentioned low viscous high-elastic non-crosslinked fracturing fluid
Rapid preparation：
The xanthan gum of 10-20 weight portion is added in the ethanol solution hydrochloride that 100-200 weight portion concentration is 2wt%, stirs
Mix reaction 3-6 hour, sucking filtration, be washed in washing liquid no chloride ion, be vacuum dried 24 hours, then desciccate be dissolved in 100-
In 200 weight portion ethylene glycol monobutyl ethers, Deca 15-30 weight portion alkyl halide, stirring reaction 12-24 hour, add excessive chlorine
Change potassium solution, stir 24 hours, by stirring product glycerol precipitation filter after be dissolved in suitable quantity of water, dialyse in distilled water to
No chloride ion, dialysis product is milled into powder after 80-90 DEG C of drying to constant weight, and crosses 120 mesh -200 mesh sieve, obtain described Huang
Virgin rubber esterification derivative.
Above-mentioned low glue high-elastic non-crosslinked fracturing fluid in it is preferable that above-mentioned xanthan gum hydroxypropylation derivant be by with
Lower step preparation：
10-30 weight portion xanthan gum is added in three-necked bottle, adds 100-200 parts by weight of isopropyl alcohol, under stirring
It is added dropwise over the NaOH solution that 10-20 weight portion concentration is 5wt%, quaternization at normal temperatures 2 hours；
Nitrogen is passed through with the pressure of 0.1MPa, after swelling 4 hours at normal temperatures, is warming up to 80-100 DEG C, is slowly added dropwise 10-
30 weight portions are dissolved in the alkyl halide of isopropanol, are passed through nitrogen again, react 2 to 6 hours；
Product is filtered, is then carried out with normal hexane, 80% acetone washing, soaks, sucking filtration, remove residue,
And it is neutralized to pH=7-8 with glacial acetic acid or boric acid, and sucking filtration, finally with 100% washing with acetone, immersion, sucking filtration, true at 80-90 DEG C
5h is dried in empty drying baker to constant weight, is milled into powder, obtain described xanthan gum hydroxypropylation derivant.
It is preferable that the alkyl halide being adopted includes 1- chloro octane, 2- chloro-pentane and 1- bromine in above-mentioned preparation process
Combination for one or more of octane etc..
Above-mentioned low glue high-elastic non-crosslinked fracturing fluid in it is preferable that above-mentioned xanthan gum carboxyl methylation derivant be by with
Lower step preparation：
Take there-necked flask, add 100-300 weight portion dehydrated alcohol and 10-30 weight portion xanthan gum, under agitation dropwise
Add the NaOH solution that 10-20 weight portion concentration is 5wt%, alkalize under room temperature 2-4 hour, is then slowly added into 5-20 weight portion
Monoxone, controlling reaction temperature is 60-70 DEG C, stops after stirring reaction 24h；
Flask is cooled to room temperature, adds glacial acetic acid or boron acid for adjusting pH value to 7 while stirring, be finally separating out solid phase and produce
Thing simultaneously uses absolute ethanol washing；The product of washing is placed in thermostatic drying chamber, drying at 80-90 DEG C is milled into constant weight
Powder, obtains described xanthan gum carboxyl methylation derivant.
It is preferable that the gel breaker being adopted includes xanthase, persulfuric acid in above-mentioned low viscous high-elastic non-crosslinked fracturing fluid
The combination of one or more of potassium, sodium peroxydisulfate and Ammonium persulfate. etc..Above-mentioned xanthase can be by Langfang City Wanke stone
The xanthase HPJM-1 that oily natural gas engineering company limited produces.
Present invention also offers the above-mentioned low preparation method gluing high-elastic non-crosslinked fracturing fluid, it comprises the following steps：
Step one：Under agitation, add 0.15-0.2 weight portion thickening agent in 100 weight portion water, then stir
20min, obtains thickening agent aqueous solution；
Step 2：During fracturing work, under agitation, add 0.02-2.0 in above-mentioned thickening agent aqueous solution
Weight portion gel breaker, is uniformly mixed, and obtains described low viscous high-elastic non-crosslinked fracturing fluid.
When preparing the low viscous high-elastic non-crosslinked fracturing fluid of the present invention, for preventing fracturing fluid from going bad, can add appropriate
Antibacterial, for example：0.5% formaldehyde, 0.5% phenol or 0.3% formaldehyde+0.2% phenol, in terms of the quality of fracturing fluid, this is not required
Component.
The low each one-tenth gluing high-elastic non-crosslinked fracturing fluid that this law invention is provided is grouped into and does not mix in advance,
Mixed during fracturing work, first thickening agent and water are mixed to get thickening agent aqueous solution, then made further according to actual
Industry needs to add gel breaker.The preparation process of this fracturing fluid and fracturing work are bound together.
The low thickening agent gluing in high-elastic non-crosslinked fracturing fluid provided by the present invention is biological polyoses, and it is changing of xanthan gum
Property derivant.It is higher, soluble in water that modified xanthan gum has low cost, tasteless, nontoxic, Wheat Protein, safety
Feature, have good stability, compatibility in aqueous.This low glue high-elastic non-crosslinked fracturing fluid have high viscosity, instant,
Heatproof, resistant to shearing, salt tolerant, the advantage of fragile glue, are a kind of cheap and easy to get, easily operated New Fracturing Fluids, can be used for pressure break
In each stage of construction, its fast dissolving properties is especially suitable for being joined online liquid, helps realize the carrying out of pressure break " batch production " operation.
Brief description
Fig. 1 is the low instant curve gluing high-elastic non-crosslinked fracturing fluid of variable concentrations；
Fig. 2 is the viscoelastic moduluses change after the low viscous high-elastic non-crosslinked fracturing fluid high shear of embodiment 5-7；
Fig. 3 is the low salt tolerant curve gluing high-elastic non-crosslinked fracturing fluid of embodiment 4,5；
Fig. 4 is low 50 DEG C of broken glue curves gluing high-elastic non-crosslinked fracturing fluid of embodiment 4；
Fig. 5 is low 110 DEG C of broken glue curves gluing high-elastic non-crosslinked fracturing fluid of embodiment 7.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and beneficial effect, the now skill to the present invention
Art scheme carry out described further below, but it is not intended that to the present invention can practical range restriction.
Embodiment 1
Present embodiments provide a kind of xanthan gum esterification derivative, itself through the following steps that preparation：
10 weight portion xanthan gum are added in the ethanol solution hydrochloride that 100 weight portion concentration are 2wt%, stirring reaction 3 is little
When, sucking filtration, it is washed in washing liquid no chloride ion, be vacuum dried 24 hours, then desciccate be dissolved in 100 weight portion ethylene glycol
In monobutyl ether, Deca 15 weight portion alkyl halide（Wherein alkyl halide is 1- chloro octane and 2- chloro-pentane ratio is 4:1 mixing
Thing）, stirring reaction 12 hours, add excessive Klorvess Liquid, stir 24 hours, product glycerol precipitation will be stirred and filter
After be dissolved in suitable quantity of water, dialyse in distilled water to no chloride ion, dialysis product be milled into powder after 90 DEG C of dryings are to constant weight,
And cross 120 mesh -200 mesh sieve, obtain xanthan gum esterification derivative.
Embodiment 2
Present embodiments provide a kind of xanthan gum hydroxypropylation derivant, itself through the following steps that preparation：
20 weight portion xanthan gum are added in three-necked bottle, adds 150 parts by weight of isopropyl alcohol, be added dropwise under stirring
15 weight portion concentration are the NaOH solution of 5wt%, quaternization at normal temperatures 2 hours；
Nitrogen is passed through with the pressure of 0.1MPa, after swelling 4 hours at normal temperatures, is warming up to 80 DEG C, is slowly added dropwise 20 weight
The alkyl halide of part isopropanol（Wherein alkyl halide is 1- chloro octane and 1- bromooctane ratio is 3:1 mixture）, lead to again
Enter nitrogen, react 5 hours at such a temperature；
Product is filtered, is then carried out with normal hexane, 80% acetone washing, soaks, sucking filtration, remove residue,
And it is neutralized to pH=7-8, sucking filtration with glacial acetic acid or boric acid, finally with 100% washing with acetone, immersion, sucking filtration, do in 80 DEG C of vacuum
5h is dried in dry case to constant weight, is milled into powder, obtain xanthan gum hydroxypropylation derivant.
Embodiment 3
Present embodiments provide a kind of xanthan gum carboxyl methylation derivant, itself through the following steps that preparation：
Take there-necked flask, add 200 weight portion dehydrated alcohol and 15 weight portion xanthan gum, be added dropwise over 20 weights under agitation
Amount part concentration is the NaOH solution of 5wt%, alkalizes 4 hours under room temperature, is then slowly added into 10 weight portion monoxones, controls reaction
Temperature is 70 DEG C, stops after stirring reaction 24h；
Flask is cooled to room temperature, adds glacial acetic acid or boron acid for adjusting pH value to 7 while stirring, be finally separating out solid phase and produce
Thing simultaneously uses absolute ethanol washing；The product of washing is placed in thermostatic drying chamber, drying at 80-90 DEG C is milled into constant weight
Powder, obtains xanthan gum carboxyl methylation derivant.
Embodiment 4
Present embodiments provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component composition：
Xanthan gum hydroxypropylation derivant 0.2 weight portion of embodiment 2, xanthase 0.02 weight portion, water 100 weight
Part.
This low glue high-elastic non-crosslinked fracturing fluid through the following steps that preparation：
Step one：Under agitation, water adds xanthan gum hydroxypropylation derivant, then stir 20min, obtain
Aqueous solution；
Step 2：Under agitation, add xanthase in above-mentioned aqueous solution, be uniformly mixed, obtain low viscous
High-elastic non-crosslinked fracturing fluid.
This low viscous high-elastic non-crosslinked fracturing fluid can apply to the pressing crack construction of 50 DEG C of wells.
Embodiment 5
Present embodiments provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component composition：
Xanthan gum hydroxypropylation derivant 0.3 weight portion of embodiment 2, xanthase 0.04 weight portion, water 100 weight
Part.
This low glue high-elastic non-crosslinked fracturing fluid through the following steps that preparation：
Step one：Under agitation, water adds xanthan gum hydroxypropylation derivant, then stir 20min, obtain
Aqueous solution；
Step 2：Under agitation, add xanthase in above-mentioned aqueous solution, be uniformly mixed, obtain low viscous
High-elastic non-crosslinked fracturing fluid.
This low viscous high-elastic non-crosslinked fracturing fluid can apply to the pressing crack construction of 70 DEG C of wells.
Embodiment 6
Present embodiments provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component composition：
Xanthan gum esterification derivative 0.4 weight portion of embodiment 1, potassium peroxydisulfate 0.2 weight portion, water 100 weight portion.
This low glue high-elastic non-crosslinked fracturing fluid through the following steps that preparation：
Step one：Under agitation, water adds xanthan gum esterification derivative, then stir 20min, obtain water-soluble
Liquid；
Step 2：Under agitation, add potassium peroxydisulfate in above-mentioned aqueous solution, be uniformly mixed, obtain low viscous
High-elastic non-crosslinked fracturing fluid.
This low viscous high-elastic non-crosslinked fracturing fluid can apply to the pressing crack construction of 90 DEG C of wells.
Embodiment 7
Present embodiments provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component composition：
Xanthan gum esterification derivative 0.5 weight portion of embodiment 1, potassium peroxydisulfate 0.5 weight portion, water 100 weight portion.
This low glue high-elastic non-crosslinked fracturing fluid through the following steps that preparation：
Step one：Under agitation, water adds xanthan gum esterification derivative, then stir 20min, obtain water-soluble
Liquid；
Step 2：Under agitation, add potassium peroxydisulfate in above-mentioned aqueous solution, be uniformly mixed, obtain low viscous
High-elastic non-crosslinked fracturing fluid.
This low viscous high-elastic non-crosslinked fracturing fluid can apply to the pressing crack construction of 110 DEG C of wells.
Embodiment 8
Present embodiments provide a kind of low viscous high-elastic non-crosslinked fracturing fluid, it has following component composition：
Xanthan gum carboxyl methylation derivant 1.0 weight portion of embodiment 3, potassium peroxydisulfate 0.5 weight portion, sodium peroxydisulfate 0.5
Weight portion, water 100 weight portion.
This low glue high-elastic non-crosslinked fracturing fluid through the following steps that preparation：
Step one：Under agitation, water adds xanthan gum carboxyl methylation derivant, then stir 20min, obtain
Aqueous solution；
Step 2：Under agitation, potassium peroxydisulfate and sodium peroxydisulfate are added in above-mentioned aqueous solution, stirring mixing is all
Even, obtain low viscous high-elastic non-crosslinked fracturing fluid.
This low viscous high-elastic non-crosslinked fracturing fluid can apply to the pressing crack construction of 150 DEG C of wells.
Test example 1
The low of this testing inspection embodiment 4-8 glues apparent viscosity change in 20 minutes for the high-elastic non-crosslinked fracturing fluid.Survey
The equipment that amount apparent viscosity is used is six fast rotating cylinder viscometers, and result of the test is shown in Fig. 1, and different curves is with xanthan derivatives
Addition distinguish.
It will be seen from figure 1 that the low viscous high-elastic non-crosslinked fracturing fluid of embodiment 4-8 just can reach in 5 minutes and finally glue
The 80% of degree, and final viscosity is big than frequently seen plants fracturing fluid.Thick in the low viscous high-elastic non-crosslinked fracturing fluid of this test explanation
Agent modified xantham gum can rise viscous quickly and reach very high final viscosity.The low instant and height gluing high-elastic non-crosslinked fracturing fluid glues
Degree characteristic enables the low viscous high-elastic non-crosslinked fracturing fluid of embodiment 4-8 to realize online mixture in construction, and is used as fracturing fluid
The hydraulic fluid of construction.
Test example 2
This tests the low resistant to shearing performance gluing high-elastic non-crosslinked fracturing fluid for detecting embodiment 5-7.Measuring apparatus are
Mars HTHP rheometer, measured low viscous high-elastic non-friendship respectively before and after 5000 revs/min of rotating speed down cut 5min
The storage moduluss G ' of connection fracturing fluid, Loss modulus G ".Result of the test is shown in Table 1 and Fig. 2.
The low performance change gluing high-elastic non-crosslinked fracturing fluid before and after table 1 shearing
Note：In table 1, modified xantham gum addition refers to be equivalent to the addition of the water of 100 weight portions in fracturing fluid.
Low viscous high-elastic non-crosslinked fracturing fluid be can be seen that by the data of table 1 and Fig. 2 and either characterize elasticity before and after shearing
There is not significant change in the storage moduluss G ' of the index or Loss modulus G characterizing viscosity ", these data illustrate low viscous height
Play the resistant to shearing performance that non-crosslinked fracturing fluid has uniqueness.When low viscous high-elastic non-crosslinked fracturing fluid is subject to shearing force, solution glues
Degree is rapid to be declined, and after removing shearing force, fluid recovers original viscosity again, and this change is reversible.
Other embodiments are also carried out with identical test, result of the test is similar.
Test example 3
This is tested for detecting that the low of embodiment 5-7 glue high-elastic non-crosslinked fracturing fluid and with hydroxypropyl guar gum as thickening agent
The viscoelasticity of the fracturing fluid prepared.Measuring apparatus are Mars HTHP rheometer, the different thickening agent consumption of measurement, different temperatures
Under the storage moduluss G ' of two kinds of fracturing fluids, Loss modulus G ".Result of the test is shown in Table 2.
Wherein, with hydroxypropyl guar gum（HPG）The fracturing fluid prepared for thickening agent is made up of hydroxypropyl guar gum and water, hydroxypropyl
The consumption of guar gum is as shown in table 2.
At 220 DEG C and 60 DEG C of table, the viscoelastic parameters of the fracturing fluid under different thickening agent species and consumption
Note：The consumption of the thickening agent in table 2 refers in fracturing fluid, with respect to the content of the water of 100 weight portions.
Low storage moduluss G ', the Loss modulus G gluing high-elastic non-crosslinked fracturing fluid " is several times of equal concentrations hydroxypropyl guar gum
To decades of times, illustrate that low viscous high-elastic non-crosslinked fracturing fluid has more preferable viscosity and elasticity, this characteristic ensures low viscous high-elastic non-
Crosslinked fracturing fluid has good prop-carrying capacity, can be used as the hydraulic fluid in each stage of pressing crack construction.Low viscous high-elastic non-crosslinked pressure
The pyruvic acid group splitting liquid thickening agent forms hydrogen bond each other in xanthan molecules, and produces hydrogen with the acetyl group of neighbouring side chain
Key, the multiple association effect occurring stronger molecule interchain reversible in weak solution forms supramolecular aggregation, has similar to friendship
The spacial framework of linked polymer is it is not necessary to crosslinking can have the over-all properties of fracturing fluid.
Other embodiments are also carried out with identical test, result of the test is similar.
Test example 4
This is tested for detecting the low salt resistant character gluing high-elastic non-crosslinked fracturing fluid that embodiment 4 and 5 prepares.Specifically
Test method is：Configure the low of different thickening agent consumptions and glue high-elastic non-crosslinked fracturing fluid in the sodium chloride solution of variable concentrations,
（It is respectively 0%, 0.5%, 1%, 1.5%, 2%, 3%, 5%, 10%, 20%, 25%, 30% chlorine with mass percent concentration in this test
Change the low viscous high-elastic non-crosslinked pressure break that sodium solution 100 parts by weight thickening agent consumption is respectively 0.3 weight portion and 0.2 weight portion
Liquid）Characterize the low salt resistant character gluing high-elastic non-crosslinked fracturing fluid with the change of apparent viscosity.What measurement apparent viscosity was used sets
Standby for six fast rotating cylinder viscometers, result of the test is shown in Table 3 and Fig. 3.
From the data of Fig. 3, with the rising of sodium chloride concentration, the low apparent viscosity change gluing high-elastic non-crosslinked fracturing fluid
Less, data explanation is low glues high-elastic non-crosslinked fracturing fluid and has a good salt resistance ability, low glue high-elastic non-crosslinked fracturing fluid with
The area that concentrated water joins liquid is equally applicable.
Identical test is also carried out to other embodiments of the present invention, result of the test is similar.
The low apparent viscosity result gluing high-elastic non-crosslinked fracturing fluid of configuration in the sodium chloride solution of table 3 variable concentrations
Test example 5
This tests the low broken colloidality energy gluing high-elastic non-crosslinked fracturing fluid for detecting embodiment 4, and gel breaker is xanthan gum
Enzyme, consumption 0.02%, test temperature is 50 DEG C.Test method is with reference to oil and gas industry standard SY/T6376-1998 " pressure break
Liquid general technical specifications " is carried out, and the equipment that measurement apparent viscosity is used is six fast rotating cylinder viscometers and capillary viscosimeter, leads to
The change crossing apparent viscosity characterizes the low broken colloidality energy gluing high-elastic non-crosslinked fracturing fluid.According to oil and gas industry standard SY/
6.8 regulation in T6376-1998 " fracturing fluid general technical specifications "：It is considered as when fracturing fluid viscosity is reduced to below 5mPa s
Broken glue.Result of the test is shown in Table 4 and Fig. 4.
The low gel breaking test data gluing high-elastic non-crosslinked fracturing fluid of table 4 embodiment 1
From the data of table 4 and Fig. 4, increase in time, low viscous high-elastic non-crosslinked fracturing fluid is in gel breaker xanthase
In the presence of fracturing fluid apparent viscosity constantly diminish, illustrate fracturing fluid interior part subchain constantly fracture it is achieved that progressively breaking glue, directly
It is 4.67mPa s to apparent viscosity when 90 minutes, " fracturing fluid is general to reach oil and gas industry standard SY/T6376-1998
The requirement of glue is thoroughly broken specified in technical conditions ".
Identical test is also carried out to other embodiments of the present invention, result of the test is similar.
Test example 6
This tests the low broken colloidality energy gluing high-elastic non-crosslinked fracturing fluid for detecting embodiment 7, and gel breaker is persulfuric acid
Potassium, consumption 0.5%, test temperature is 110 DEG C.Test method is with reference to oil and gas industry standard SY/T6376-1998 " pressure
Split liquid general technical specifications ", the equipment that measurement apparent viscosity is used is six fast rotating cylinder viscometers and capillary viscosimeter, passes through
The change of apparent viscosity characterizes the low broken colloidality energy gluing high-elastic non-crosslinked fracturing fluid.According to oil and gas industry standard SY/
6.8 regulation in T6376-1998 " fracturing fluid general technical specifications "：It is considered as when fracturing fluid viscosity is reduced to below 5mPa s
Broken glue.Result of the test is shown in Table 5 and Fig. 5.
The low gel breaking test data gluing high-elastic non-crosslinked fracturing fluid of table 5 embodiment 7
From the data of table 5 and Fig. 5, increase in time, low viscous high-elastic non-crosslinked fracturing fluid is in gel breaker xanthase
In the presence of fracturing fluid apparent viscosity constantly diminish, illustrate fracturing fluid interior part subchain constantly fracture it is achieved that progressively breaking glue, directly
It is 4.33mPa s to apparent viscosity when 90 minutes, " fracturing fluid is general to reach oil and gas industry standard SY/T6376-1998
The requirement of glue is thoroughly broken specified in technical conditions ".
Other embodiments are also carried out with identical test, result of the test is similar.
Claims (3)
1. a kind of non-crosslinked fracturing fluid, it has following component composition：Thickening agent 0.15-2.0 weight portion, gel breaker 0.02-2.0
Weight portion, water 100 weight portion；
Wherein, described thickening agent is one of xanthan gum hydroxypropylation derivant and xanthan gum carboxyl methylation derivant or two kinds
Combination；
Wherein, described xanthan gum hydroxypropylation derivant through the following steps that preparation：
The xanthan gum of 10-30 weight portion is added the isopropanol adding 100-200 weight portion in three-necked bottle, under stirring
It is added dropwise over the NaOH solution that 10-20 weight portion concentration is 5wt%, quaternization at normal temperatures 2 hours；
Nitrogen is passed through with the pressure of 0.1MPa, after swelling 4 hours at normal temperatures, is warming up to 80-100 DEG C, be slowly added dropwise 10-30 weight
Amount part is dissolved in the alkyl halide of isopropanol, is passed through nitrogen again, reacts 2 to 6 hours；Described alkyl halide includes 1- chloro octane, 2-
The combination of one or more of chloro-pentane and 1- bromooctane；
Product is filtered, then carried out with normal hexane, 80% acetone washing, soak, sucking filtration, remove residue, and
It is neutralized to pH=7-8 with glacial acetic acid or boric acid, sucking filtration, finally with 100% washing with acetone, immersion, sucking filtration, true at 80-90 DEG C
5h is dried in empty drying baker to constant weight, is milled into powder, obtain described xanthan gum hydroxypropylation derivant；
Wherein, described xanthan gum carboxyl methylation derivant through the following steps that preparation：
Take there-necked flask, add 100-300 weight portion dehydrated alcohol and 10-30 weight portion xanthan gum, be added dropwise under agitation
10-20 weight portion concentration is the NaOH solution of 5wt%, and alkalize under room temperature 2-4 hour, is then slowly added into 5-20 weight portion chloroethene
Acid, controlling reaction temperature is 60-70 DEG C, stops after stirring reaction 24h；
Flask is cooled to room temperature, adds glacial acetic acid or boron acid for adjusting pH value to 7 while stirring, be finally separating out solid product simultaneously
Use absolute ethanol washing；The product of washing is placed in thermostatic drying chamber, drying at 80-90 DEG C is milled into powder to constant weight,
Obtain described xanthan gum carboxyl methylation derivant.
2. non-crosslinked fracturing fluid according to claim 1, wherein, described gel breaker includes xanthase, potassium peroxydisulfate, mistake
The combination of one or more of sodium sulfate and Ammonium persulfate..
3. the preparation method of the non-crosslinked fracturing fluid described in claim 1 or 2, it comprises the following steps：
Step one：Under agitation, add 0.15-0.2 weight portion thickening agent in 100 weight portion water, then stir
20min, obtains thickening agent aqueous solution；
Step 2：During fracturing work, under agitation, add 0.02-2.0 weight in above-mentioned thickening agent aqueous solution
Part gel breaker, is uniformly mixed, obtains described non-crosslinked fracturing fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410087997.9A CN103881686B (en) | 2014-03-11 | 2014-03-11 | Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410087997.9A CN103881686B (en) | 2014-03-11 | 2014-03-11 | Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103881686A CN103881686A (en) | 2014-06-25 |
| CN103881686B true CN103881686B (en) | 2017-02-08 |
Family
ID=50950828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410087997.9A Active CN103881686B (en) | 2014-03-11 | 2014-03-11 | Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103881686B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312571B (en) * | 2014-09-17 | 2017-07-14 | 华东理工大学 | A kind of modified xantham gum thickening and its application in fracturing fluid is prepared |
| CN106800924A (en) * | 2016-12-28 | 2017-06-06 | 中国石油天然气股份有限公司 | A kind of high temperature resistant xanthan fracturing fluid and preparation method thereof |
| CN107267133A (en) * | 2017-06-07 | 2017-10-20 | 常州苏通海平机电科技有限公司 | A kind of composite fracturing fluid thickening agent and preparation method thereof |
| CN110872507A (en) * | 2018-08-29 | 2020-03-10 | 思达斯易能源技术(集团) 有限公司 | Non-crosslinked fracturing fluid, preparation method and application thereof and non-crosslinked fracturing fluid thickener |
| CN110305652A (en) * | 2018-09-13 | 2019-10-08 | 中海石油(中国)有限公司上海分公司 | Pressure break Complex Temporary Blocking agent and preparation method thereof |
| CN109337663A (en) * | 2018-11-19 | 2019-02-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Low permeability reservoir continuous mixed displacement of reservoir oil type fracturing fluid and its preparation method and application |
| CN110041444B (en) * | 2019-04-28 | 2019-11-01 | 北京大德广源石油技术服务有限公司 | The preparation method of the modified xantham gum of oil and gas well fracturing fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712535B2 (en) * | 2006-10-31 | 2010-05-11 | Clearwater International, Llc | Oxidative systems for breaking polymer viscosified fluids |
| CN102796507A (en) * | 2012-08-29 | 2012-11-28 | 北京世纪中星能源技术有限公司 | Xanthan gum fracturing fluid, and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120157356A1 (en) * | 2010-12-20 | 2012-06-21 | Frac Tech Services Llc | Hydraulic fracturing with slick water from dry blends |
-
2014
- 2014-03-11 CN CN201410087997.9A patent/CN103881686B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712535B2 (en) * | 2006-10-31 | 2010-05-11 | Clearwater International, Llc | Oxidative systems for breaking polymer viscosified fluids |
| CN102796507A (en) * | 2012-08-29 | 2012-11-28 | 北京世纪中星能源技术有限公司 | Xanthan gum fracturing fluid, and preparation method and application thereof |
| CN103361042A (en) * | 2012-08-29 | 2013-10-23 | 北京世纪中星能源技术有限公司 | Xanthan gum non-crosslinking fracturing fluid as well as preparation method and application thereof |
Non-Patent Citations (4)
| Title |
|---|
| Audrey Roy等.Hydrophobically Modified Xanthan: An Amphiphilic but Not.《Biomacromolecules》.2014,第15卷 * |
| 侯帆等.新型压裂液体系性能评价.《石油实验地质》.2013,第 35卷 * |
| 钱晓琳等.Synthesis and Aqueous Solution Viscosity of Hydrophobically Modified Xanthan Gum.《Journal of Beijing Institute of Technology》.2007,(第03期), * |
| 钱晓琳等.疏水改性黄原胶HMXG-C8水溶液黏度特征.《油田化学》.2007,(第02期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103881686A (en) | 2014-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103881686B (en) | Low-viscosity and high-elasticity non-crosslinking fracturing fluid and preparation method thereof | |
| CN103694986B (en) | A kind of guar gum fracturing fluid | |
| CN103554288B (en) | Instant guar gum and preparation method thereof | |
| CN106467734B (en) | Crosslinking agent for fracturing and preparation method thereof | |
| CN104531125A (en) | Modified fenugreek gum fracturing fluid and preparation method thereof | |
| CN102618248A (en) | High-chelating-degree liquid state boron cross-linking agent for gugnidine glue fracturing fluid | |
| CN106318365A (en) | Reversible physical crosslinking polymer fracturing fluid and preparation method thereof | |
| CN104910890A (en) | Organoboron-hydroxypropyl guanidine gum system crosslinking promoter, and preparation method thereof | |
| CN104087283B (en) | Pressure break thickener that rapid dispersion viscosifies under a kind of acid condition and preparation method thereof | |
| CN109439310A (en) | High temperature guanidine gum fracturing fluid and preparation method thereof | |
| CN112159651A (en) | Multifunctional thickening agent and preparation method thereof | |
| CN103525886B (en) | Clean liquid guanidine glue and preparation method thereof | |
| CN102977878B (en) | Vegetable gelatin fracturing fluid and preparation method thereof | |
| Zhang et al. | Experimental evaluation of a novel modification of anionic guar gum with maleic anhydride for fracturing fluid | |
| CN110724503A (en) | High-temperature salt-resistant filtrate reducer modified gum resin for drilling fluid | |
| CN104403655B (en) | A kind of oil field fracturing fluid and preparation method thereof | |
| CN103666438B (en) | A kind of alkaline modification seaweed gel fracturing liquid | |
| CN103305571A (en) | Preparation method of low-molecular-weight plant gelatin powder | |
| CN106800924A (en) | A kind of high temperature resistant xanthan fracturing fluid and preparation method thereof | |
| CN108219766A (en) | Macromolecule thickener and its preparation method and application | |
| CN103881687B (en) | A kind of instant modified cellulose crosslinking clean fracturing fluid and preparation method thereof | |
| CN112552885B (en) | Superhigh temperature resistant 180 ℃ tackifying type well completion fluid and workover fluid | |
| CN109517082A (en) | A kind of non-long linear alkyl hydrophobically modified hydroxyethyl guar gum thickener and preparation method thereof | |
| CN113025299B (en) | Water-based guanidine gum fracturing fluid synergist and preparation method and application thereof | |
| CN105820264A (en) | Modified xanthan gum, preparation method thereof and fracturing fluid containing modified xanthan gum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |