CN106800924A - A kind of high temperature resistant xanthan fracturing fluid and preparation method thereof - Google Patents
A kind of high temperature resistant xanthan fracturing fluid and preparation method thereof Download PDFInfo
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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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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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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- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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Abstract
The invention provides a kind of high temperature resistant xanthan fracturing fluid and preparation method thereof.The fracturing fluid includes following parts by weight ingredient：0.4 0.6 parts of xanthans, 0.2 2 parts of temperature stability agent, 1.0 3.0 parts of other auxiliary additives.The present invention promotes xanthan gum structure to change to double-spiral structure by adding temperature stability agent (calcium chloride, potassium formate etc.), so as to improve its temperature and shearing sustainability, xanthans is still had good solid-carrying performance under high temperature and high shear.
Description
Technical field
The present invention relates to oil-gas reservoir volume increase exploitation field, specifically, be related to a kind of high temperature resistant xanthan fracturing fluid and
Its preparation method.
Background technology
With deepening continuously and increasingly increase to energy demand for Reservoir Development, unconventional petroleum resources has turned into
The focus of current exploration and development.The important measures of volume increase, application are hidden in hydraulic fracturing as hypotonic, special hypotonic and unconventionaloil pool
It is more and more extensive.In pressing crack construction process, the quality of fracturing fluid property is directly connected to the success or failure of pressing crack construction and increases after pressing
Produce effect.Xanthans is the macromolecule polysaccharide produced through Xanthomonas campestris fermentation by carbohydrate, intermolecular to be wound double helix
Structure, is a kind of microbial polysaccharide thickening agent of the function admirable that can replace natural plant gum, is widely used in petroleum industry, such as
Drilling well, completion, profile control and water plugging etc., with good thickening and rheological property.
Application No. 201410475166.9, the Chinese patent application of Publication No. CN104312571A, the modified Huang of one kind
Virgin rubber thickening agent and its application in fracturing fluid is prepared disclose a kind of preparation method of xanthan fracturing fluid, and its elder generation is in water
Clay stabilizer potassium chloride is added, xanthan rubber powder is then added.But thickening process of the xanthans in salting liquid is slower, its increasing
Viscous speed is far below its speed of viscosity increasement in water.
Application No. 201310286824.5, the Chinese patent application of Publication No. CN103361042A, the non-friendship of xanthans
Connection fracturing fluid, Preparation Method And The Use disclose a kind of preparation method of the non-crosslinked fracturing fluid of xanthans, its by xanthans and
Clay stabilizer (potassium chloride) is added in water after mixing.But this method is also unfavorable for that xanthans is viscosified rapidly.
Xanthans is a kind of typical pseudoplastic fluid, low cost, with sticky and elasticity higher, and with good
Water-soluble, resistance to acids and bases and salt tolerance, can be as non-crosslinked fracturing fluid.But when xanthans is used as fracturing fluid, in low temperature well (T<
80 DEG C) better performances；But (T under the high temperature conditions>80 DEG C), its temperature and shearing sustainability is undesirable, and viscoelastic property can be significantly
Degree declines, and causes that the not enough even sand fallout of prop-carrying capacity can be there is when high temperature well is used.
Therefore, research and develop a kind of instant high temperature resistant xanthan fracturing fluid, make its still have at high temperature good viscoplasticity and
Solid-carrying performance, is still the problem of urgent need to resolve.
The content of the invention
It is an object of the present invention to provide a kind of high temperature resistant xanthan fracturing fluid, fracturing fluid of the invention is avoided often
Rule xanthan fracturing fluid the speed of viscosity increasement is slow, sand fallout at high temperature, and the fracturing fluid the speed of viscosity increasement is fast, and still has stabilization at high temperature
Network structure, temperature and shearing sustainability is good, and prop-carrying capacity is strong.
Preparation method another object of the present invention is to provide described high temperature resistant xanthan fracturing fluid.
It is up to above-mentioned purpose, on the one hand, the invention provides a kind of high temperature resistant xanthan fracturing fluid, wherein, the pressure break
Liquid includes following parts by weight ingredient：Xanthans 0.4-0.6 parts, temperature stability agent 0.2-2 parts, other auxiliary additives 1.0-3.0
Part.
According to some specific embodiments of the invention, wherein, the fracturing fluid includes following parts by weight ingredient：Xanthans
0.4-0.6 parts, temperature stability agent 0.2-2 parts, clay stabilizer 0.5-1 parts, demulsification cleanup agent 0.5-1 parts and gel breaker 0.02-
1 part.
According to some specific embodiments of the invention, wherein, the fracturing fluid also includes 100 parts of water.
According to some specific embodiments of the invention, wherein, the temperature stability agent is selected from potassium formate, sodium formate and chlorination
One or more in calcium.
It is a discovery of the invention that xanthans forms orderly double-spiral structure in aqueous, this structure is produced to its main chain
Certain protective effect；When at high temperature, xanthans double-spiral structure can be opened, and be transformed into mixed and disorderly unordered structure, this knot
Structure can cause that the viscoelastic property of xanthan gum solution significantly declines.It (is particularly calcium chloride, potassium formate, formic acid to add salt ion
Sodium etc.) after, salt ion sets up salt bridge in xanthan molecules interchain, xanthan gum structure is changed to double-spiral structure at high temperature,
This double-spiral structure of xanthans enables that its endurance of cutting at high temperature is improved.
According to some specific embodiments of the invention, wherein, the clay stabilizer is potassium chloride.
According to some specific embodiments of the invention, wherein, the demulsification cleanup agent is APES class table
Face activating agent.
According to some specific embodiments of the invention, wherein, the demulsification cleanup agent is APES sulfuric acid
The mixture of salt anionic surfactant and APES nonionic surfactant.
It is APES sulphate anion surface active agent that the present invention can use the composition of conventional commercial
With the demulsification cleanup agent of APES nonionic surfactant, and according to some specific embodiments of the invention,
Wherein, the demulsification cleanup agent is DL-12 type surfactants.
According to some specific embodiments of the invention, wherein, the demulsification cleanup agent is Hua You Cologne, Beijing development company
The DL-12 type surfactants of production, its main component be APES sulphate anion surface active agent and
The mixture of APES nonionic surfactant.
According to some specific embodiments of the invention, wherein, the gel breaker is potassium peroxydisulfate and/or ammonium persulfate.
According to some specific embodiments of the invention, wherein, the preparation of the fracturing fluid includes：
(1) xanthan gum solution is prepared；
(2) aqueous solution of temperature stability agent is prepared, under agitation, the temperature stability agent aqueous solution xanthans is added to water-soluble
Liquid, stirs；
(3) under agitation, other auxiliary additives are added in the solution for obtaining to step (2), the high temperature resistant is obtained yellow
Virgin rubber fracturing fluid.
The present invention it has furthermore been found that the speed of viscosity increasement of the xanthans in salting liquid is slow, the thickening much smaller than it in water
Speed.First xanthan gum powder is added to the water, makes its rapid thickening, it is fully swelling, then add temperature stability agent (chlorination
Calcium) and clay stabilizer (potassium chloride) etc., so that xanthans reaches instant effect.Therefore, first make xanthans fast in water
After speed thickening, then the additive that will have been configured mixes with xanthan gum solution, and xanthans on the one hand can be made to reach instant effect
Really, xanthans endurance of cutting energy at high temperature can also on the other hand be significantly improved.
According to some specific embodiments of the invention, wherein, step (1) is under agitation, xanthans to be added to the water, and is stirred
3~5min is mixed, xanthan gum solution is obtained.
According to some specific embodiments of the invention, wherein, step (1) prepares the xanthan that mass concentration is 0.5~0.6%
Glue solution.
According to some specific embodiments of the invention, wherein, it is steady that step (2) prepares the temperature that mass concentration is 0.2~2%
Determine the agent aqueous solution, under agitation, the temperature stability agent aqueous solution is added in xanthan gum solution, stir.
On the other hand, present invention also offers the preparation method of described high temperature resistant xanthan fracturing fluid, wherein, the side
Method includes：
(1) xanthan gum solution is prepared；
(2) aqueous solution of temperature stability agent is prepared, under agitation, the temperature stability agent aqueous solution xanthans is added to water-soluble
In liquid, stir；
(3) under agitation, other auxiliary additives are added in the solution for obtaining to step (2), the high temperature resistant is obtained yellow
Virgin rubber fracturing fluid.
According to some specific embodiments of the invention, wherein, step (1) is under agitation, xanthans to be added to the water, and is stirred
3~5min is mixed, xanthan gum solution is obtained.
According to some specific embodiments of the invention, wherein, step (1) prepares the xanthan that mass concentration is 0.5~0.6%
Glue solution.
According to some specific embodiments of the invention, wherein, it is steady that step (2) prepares the temperature that mass concentration is 0.2~2%
Determine the agent aqueous solution, under agitation, the temperature stability agent aqueous solution is added in xanthan gum solution, stir.
In sum, the invention provides a kind of high temperature resistant xanthan fracturing fluid and preparation method thereof.Pressure break of the invention
Liquid has the following advantages that：
Be first existing xanthan fracturing fluid using salting liquid is first configured to, add xanthans (or by xanthans
It is added to the water simultaneously with after salt mixing), this preparation method causes the speed of viscosity increasement of xanthans very slow, is unfavorable for that pressure break is applied
Work；And the present invention is used and xanthans is viscosified rapidly in water, then the additive that will have been configured mixes with xanthan gum solution,
So that xanthans reaches instant effect.
Secondly, after current xanthan fracturing fluid is sheared at high temperature, viscoelastic property loss is serious, and solid-carrying performance is not
It is good；The present invention promotes xanthan gum structure to change to double-spiral structure by adding temperature stability agent (calcium chloride, potassium formate etc.),
So as to improve its temperature and shearing sustainability, make xanthans that still there is good solid-carrying performance under high temperature and high shear.
Brief description of the drawings
Fig. 1 (is not added with temperature stability agent CaCl for xanthan gum solution2) and embodiment 1 in high temperature resistant xanthan gum solution it is resistance to
Warm resistant to shearing performance curve (100 DEG C).
Fig. 2 (is not added with temperature stability agent CaCl for xanthan gum solution2) and embodiment 2 in high temperature resistant xanthan gum solution it is resistance to
Warm resistant to shearing performance curve (120 DEG C).
Fig. 3 is the resistance to of high temperature resistant xanthan gum solution in xanthan gum solution (being not added with temperature stability agent HCOOK) and embodiment 3
Warm resistant to shearing performance curve (100 DEG C).
Fig. 4 is the resistance to of high temperature resistant xanthan gum solution in xanthan gum solution (being not added with temperature stability agent HCOOK) and embodiment 4
Warm resistant to shearing performance curve (120 DEG C).
Specific embodiment
Implementation process of the invention and the beneficial effect for producing are described in detail below by way of specific embodiment, it is intended to which help is read
Reader more fully understands essence of the invention and feature, not as to this case can practical range restriction.
Embodiment 1
A kind of instant high temperature resistant xanthan fracturing fluid is present embodiments provided, what it was comprised the following ingredients：
The weight portion of xanthans 0.5；The weight portion of temperature stability agent (calcium chloride) 0.2；0.5 part of weight of clay stabilizer (potassium chloride)
Amount part；Demulsification cleanup agent (DL-12 types surfactant) 0.5 weight portion；The weight portion of gel breaker (ammonium persulfate) 0.02；Water 100
Weight portion.
The instant high temperature resistant xanthan fracturing fluid is prepared according to following steps：
(1) under agitation, xanthans is added in water, 3min is then stirred, the instant xanthan for viscosifying rapidly is obtained
Glue solution；
(2) temperature stability agent is made into the aqueous solution of high concentration, under agitation, is added in the xanthan gum solution
Enter the aqueous solution of the temperature stability agent of formula ratio, be uniformly mixed to form high temperature resistant xanthan gum solution；
(3) under agitation, to the clay stabilizer that formula ratio is added in the high temperature resistant xanthan gum solution, broken glue
Agent, demulsification cleanup agent, obtain instant high temperature resistant xanthan fracturing fluid.
The instant high temperature resistant xanthan fracturing fluid can apply to 100 DEG C of pressing crack constructions of well.
Embodiment 2
A kind of instant high temperature resistant xanthan fracturing fluid is present embodiments provided, what it was comprised the following ingredients：
The weight portion of xanthans 0.6；The weight portion of temperature stability agent (calcium chloride) 0.5；1 part of weight of clay stabilizer (potassium chloride)
Part；Demulsification cleanup agent (DL-12 types surfactant) 1 weight portion；The weight portion of gel breaker (ammonium persulfate) 0.04；The weight of water 100
Part.
The instant high temperature resistant xanthan fracturing fluid is prepared according to following steps：
(1) under agitation, xanthans is added in water, 3min is then stirred, the instant xanthan for viscosifying rapidly is obtained
Glue solution；
(2) temperature stability agent is made into the aqueous solution of high concentration, under agitation, is added in the xanthan gum solution
Enter the aqueous solution of the temperature stability agent of formula ratio, be uniformly mixed to form high temperature resistant xanthan gum solution；
(3) under agitation, to the clay stabilizer that formula ratio is added in the high temperature resistant xanthan gum solution, broken glue
Agent, demulsification cleanup agent, obtain instant high temperature resistant xanthan fracturing fluid.
The instant high temperature resistant xanthan fracturing fluid can apply to 120 DEG C of pressing crack constructions of well.
Embodiment 3
A kind of instant high temperature resistant xanthan fracturing fluid is present embodiments provided, what it was comprised the following ingredients：
The weight portion of xanthans 0.5；The weight portion of temperature stability agent (potassium formate) 1；0.5 part of weight of clay stabilizer (potassium chloride)
Part；Demulsification cleanup agent (DL-12 types surfactant) 0.7 weight portion；The weight portion of gel breaker (ammonium persulfate) 0.04；The weight of water 100
Amount part.
The instant high temperature resistant xanthan fracturing fluid is prepared according to following steps：
(1) under agitation, xanthans is added in water, 3min is then stirred, the instant xanthan for viscosifying rapidly is obtained
Glue solution；
(2) temperature stability agent is made into the aqueous solution of high concentration, under agitation, is added in the xanthan gum solution
Enter the aqueous solution of the temperature stability agent of formula ratio, be uniformly mixed to form high temperature resistant xanthan gum solution；
(3) under agitation, to the clay stabilizer that formula ratio is added in the high temperature resistant xanthan gum solution, broken glue
Agent, demulsification cleanup agent, obtain instant high temperature resistant xanthan fracturing fluid.
The instant high temperature resistant xanthan fracturing fluid can apply to 100 DEG C of pressing crack constructions of well.
Embodiment 4
A kind of instant high temperature resistant xanthan fracturing fluid is present embodiments provided, what it was comprised the following ingredients：
The weight portion of xanthans 0.6；The weight portion of temperature stability agent (potassium formate) 2；1 part of weight of clay stabilizer (potassium chloride)
Part；Demulsification cleanup agent (DL-12 types surfactant) 1 weight portion；The weight portion of gel breaker (ammonium persulfate) 0.06；The weight of water 100
Part.
The instant high temperature resistant xanthan fracturing fluid is prepared according to following steps：
(1) under agitation, xanthans is added in water, 3min is then stirred, the instant xanthan for viscosifying rapidly is obtained
Glue solution；
(2) temperature stability agent is made into the aqueous solution of high concentration, under agitation, is added in the xanthan gum solution
Enter the aqueous solution of the temperature stability agent of formula ratio, be uniformly mixed to form high temperature resistant xanthan gum solution；
(3) under agitation, to the clay stabilizer that formula ratio is added in the high temperature resistant xanthan gum solution, broken glue
Agent, demulsification cleanup agent, obtain instant high temperature resistant xanthan fracturing fluid.
The instant high temperature resistant xanthan fracturing fluid can apply to 120 DEG C of pressing crack constructions of well.
Test example 1
This is tested for the speed of viscosity increasement of the xanthans in water and in salting liquid in comparative example 1-4.Measurement xanthan
The equipment that sol solution viscosity B coefficent is used is six fast rotation viscometers, and result of the test is shown in Table 1.Table 1 is 0.6% xanthans not
Apparent viscosity (mPas) after same solution, different swelling times.
Table 1
As can be seen from Table 1, the speed of viscosity increasement of the xanthans in salting liquid is slower, and the speed of viscosity increasement of the xanthans in water is very
Hurry up, the 96% of final viscosity can be just reached in 3 minutes.The high temperature resistant xanthan glue laminated that experiment explanation is prepared by embodiment 1-4
Split liquid energy to rise quickly viscous and reach final viscosity very high, be conducive to pressing crack construction.
Test example 2
This tests the temperature and shearing sustainability for detecting the high temperature resistant xanthan gum solution that embodiment 1 is prepared.And and
The xanthan gum solution for being not added with temperature stability agent is contrasted.Test method is with reference to oil and gas industry standard SY/
T5107-2005 " aqueous fracturing fluid performance evaluation way ", measuring apparatus are RS6000 rheometers, as a result referring to Fig. 1.
Fig. 1 (is not added with temperature stability agent CaCl for xanthan gum solution2) and embodiment 1 in high temperature resistant xanthan gum solution it is resistance to
Warm resistant to shearing performance curve (100 DEG C).As shown in Figure 1：In 100 DEG C, 170s-1After condition down cut 90 minutes, temperature is not added with
The reservation viscosity of the xanthan gum solution of stabilizer is 31.2mPas, and the reservation of the high temperature resistant xanthan gum solution in embodiment 1
Viscosity is 51.7mPas；Compared with the xanthan gum solution for being not added with temperature stability agent, the high temperature resistant xanthan peptization in embodiment 1
Liquid has more preferable temperature and shearing sustainability, can be used under 100 DEG C of well temperature.
Test example 3
This tests the temperature and shearing sustainability for detecting the high temperature resistant xanthan gum solution that embodiment 2 is prepared.And and
The xanthan gum solution for being not added with temperature stability agent is contrasted.Test method is with reference to oil and gas industry standard SY/
T5107-2005 " aqueous fracturing fluid performance evaluation way ", measuring apparatus are RS6000 rheometers, as a result referring to Fig. 2.
Fig. 2 (is not added with temperature stability agent CaCl for xanthan gum solution2) and embodiment 2 in high temperature resistant xanthan gum solution it is resistance to
Warm resistant to shearing performance curve (120 DEG C).As shown in Figure 2：In 120 DEG C, 170s-1After condition down cut 90 minutes, temperature is not added with
The reservation viscosity of the xanthan gum solution of stabilizer is 29mPas, and the reservation of the high temperature resistant xanthan gum solution in embodiment 2 is glued
It is 84mPas to spend；Compared with the xanthan gum solution for being not added with temperature stability agent, the high temperature resistant xanthan gum solution tool in embodiment 2
There is more preferable temperature and shearing sustainability, can be used under 120 DEG C of well temperature.
Test example 4
This tests the temperature and shearing sustainability for detecting the high temperature resistant xanthan gum solution that embodiment 3 is prepared.And and
The xanthan gum solution for being not added with temperature stability agent is contrasted.Test method is with reference to oil and gas industry standard SY/
T5107-2005 " aqueous fracturing fluid performance evaluation way ", measuring apparatus are RS6000 rheometers, as a result referring to Fig. 3.
Fig. 3 is the resistance to of high temperature resistant xanthan gum solution in xanthan gum solution (being not added with temperature stability agent HCOOK) and embodiment 3
Warm resistant to shearing performance curve (100 DEG C).As shown in Figure 3：After 100 DEG C, 170s-1 conditions down cut 90 minutes, temperature is not added with
The reservation viscosity of the xanthan gum solution of stabilizer is 31.2mPas, and the reservation of the high temperature resistant xanthan gum solution in embodiment 3
Viscosity is 56.2mPas；Compared with the xanthan gum solution for being not added with temperature stability agent, the high temperature resistant xanthan peptization in embodiment 3
Liquid has more preferable temperature and shearing sustainability, can be used under 100 DEG C of well temperature.
Test example 5
This tests the temperature and shearing sustainability for detecting the high temperature resistant xanthan gum solution that embodiment 4 is prepared.And and
The xanthan gum solution for being not added with temperature stability agent is contrasted.Test method is with reference to oil and gas industry standard SY/
T5107-2005 " aqueous fracturing fluid performance evaluation way ", measuring apparatus are RS6000 rheometers, as a result referring to Fig. 4.
Fig. 4 is the resistance to of high temperature resistant xanthan gum solution in xanthan gum solution (being not added with temperature stability agent HCOOK) and embodiment 4
Warm resistant to shearing performance curve.As shown in Figure 4：In 120 DEG C, 170s-1After condition down cut 90 minutes, temperature stability agent is not added with
The reservation viscosity of xanthan gum solution is 29mPas, and the reservation viscosity of the high temperature resistant xanthan gum solution in embodiment 4 is
69mPa·s；Compared with the xanthan gum solution for being not added with temperature stability agent, the high temperature resistant xanthan gum solution in embodiment 4 has more
Good temperature and shearing sustainability, can use under 120 DEG C of well temperature.
Claims (10)
1. a kind of high temperature resistant xanthan fracturing fluid, wherein, the fracturing fluid includes following parts by weight ingredient：Xanthans 0.4-0.6
Part, temperature stability agent 0.2-2 parts, 1.0-3.0 parts of other auxiliary additives.
2. high temperature resistant xanthan fracturing fluid according to claim 1, wherein, the fracturing fluid include following weight portion into
Point：Xanthans 0.4-0.6 parts, temperature stability agent 0.2-2 parts, clay stabilizer 0.5-1 parts, demulsification cleanup agent 0.5-1 parts and broken
Jelly 0.02-1 parts.
3. high temperature resistant xanthan fracturing fluid according to claim 1 and 2, wherein, the fracturing fluid also includes 100 parts of water.
4. high temperature resistant xanthan fracturing fluid according to claim 1 and 2, wherein, the temperature stability agent be selected from potassium formate,
One or more in sodium formate and calcium chloride.
5. high temperature resistant xanthan fracturing fluid according to claim 1 and 2, wherein, the clay stabilizer is potassium chloride.
6. high temperature resistant xanthan fracturing fluid according to claim 1 and 2, wherein, the demulsification cleanup agent is poly- for alkyl phenol
Oxygen ethene ether surfactant；Wherein it is preferably APES sulphate anion surface active agent and alkyl phenol
The mixture of polyoxyethylene ether nonionic surfactant；More preferably DL-12 types surfactant；Most preferably Beijing China is oily
The DL-12 type surfactants of Cologne development company.
7. high temperature resistant xanthan fracturing fluid according to claim 1 and 2, wherein, the gel breaker be potassium peroxydisulfate and/or
Ammonium persulfate.
8. the high temperature resistant xanthan fracturing fluid described in claim 1~7 any one, wherein, the preparation of the fracturing fluid includes：
(1) xanthan gum solution is prepared；It is preferred that preparing the xanthan gum solution that mass concentration is 0.5~0.6%；
(2) the temperature stability agent aqueous solution is prepared, under agitation, the aqueous solution of temperature stability agent xanthan gum solution is added to
In, stir；It is wherein preferred to prepare the temperature stability agent aqueous solution that mass concentration is 0.2~2%, under agitation, by temperature
The stabilizer aqueous solution is added in xanthan gum solution, is stirred；
(3) under agitation, other auxiliary additives are added in the solution for obtaining to step (2), the high temperature resistant xanthans is obtained
Fracturing fluid.
9. high temperature resistant xanthan fracturing fluid according to claim 8, wherein, step (1) be under agitation, by xanthans plus
Enter in water, stir 3~5min, obtain xanthan gum solution.
10. the preparation method of the high temperature resistant xanthan fracturing fluid described in claim 1~9 any one, wherein, methods described bag
Include：
(1) xanthan gum solution is prepared；
(2) aqueous solution of temperature stability agent is prepared, under agitation, the temperature stability agent aqueous solution xanthan gum solution is added to
In, stir；
(3) under agitation, other auxiliary additives are added in the solution for obtaining to step (2), the high temperature resistant xanthans is obtained
Fracturing fluid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300448A (en) * | 2018-01-22 | 2018-07-20 | 西安石油大学 | A kind of fracturing fluid and preparation method thereof for fine and close oil-gas reservoir |
| 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 |
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| 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 |
| CN111690393A (en) * | 2019-03-12 | 2020-09-22 | 中国石油天然气股份有限公司 | High-temperature-resistant weighted sand washing liquid and preparation method thereof |
| CN111690393B (en) * | 2019-03-12 | 2022-10-04 | 中国石油天然气股份有限公司 | High-temperature-resistant weighted sand washing liquid and preparation method thereof |
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