CN106497536A - Xanthan gum non-crosslinked fracturing fluid and preparation method thereof - Google Patents
Xanthan gum non-crosslinked fracturing fluid and preparation method thereof Download PDFInfo
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- CN106497536A CN106497536A CN201610915039.5A CN201610915039A CN106497536A CN 106497536 A CN106497536 A CN 106497536A CN 201610915039 A CN201610915039 A CN 201610915039A CN 106497536 A CN106497536 A CN 106497536A
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
Abstract
The present invention relates to oil-gas field development stimulation technology field, more particularly to a kind of xanthan gum non-crosslinked fracturing fluid and preparation method thereof.The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：Xanthan gum 20 25, gelation aid 15 20, clay stabilizer 40 45, antioxidative stabilizer 79, antibacterial 1 1.5, gel breaker 35 40, pH value regulator 37, cleanup additive 40 45 and water 200 500.Xanthan gum non-crosslinked fracturing fluid and preparation method thereof that the present invention is provided, with high apparent viscosity, prop-carrying capacity is strong, filter loss is little the characteristics of, can be used for the fracturing reform that alkali is quick, intrinsic fracture develops reservoir.
Description
Technical field
The present invention relates to oil-gas field development stimulation technology field, more particularly to a kind of xanthan gum non-crosslinked fracturing fluid and
Its preparation method.
Background technology
Fracturing fluid is played an important role in oil-gas field development reservoir reconstruction, and its Main Function principle is：Using high pressure
Fracturing fluid high pressure, using the principle of liquid pressure transmission, is injected oil well, and gradually rises well cylinder pressure by large discharge pump, from
And high pressure has been suppressed in shaft bottom, when the tensile strength that this pressure is more than the crustal stress near the borehole wall and formation rock, just in shaft bottom
Nearby stratum produces crack：Continue injection fracturing fluid, crack extends forward and fills out with proppant, so as in stratum near shaft bottom
The sand packed fracture with certain physical dimension and high flow conductivity is formed, the purpose of oil exploitation increasing yield and injection is reached.
The fracturing fluid that at present oil field uses, mostly makees thickening agent with modified hydroxypropyl guar gum, borate, organic boron, has
Machine zirconium etc. makees cross-linking agent, and the crosslinked gel of formation has stronger prop-carrying capacity.Such product puts into city from the sixties in last century
Since, for guaranteeing that pressing crack construction has successfully played huge effect, but for the quick property oil reservoir of alkali, heterogeneous body sandy conglomerate bodies,
The reservoir of intrinsic fracture development, its drawback also progressively come out.This kind of crosslinked fracturing fluid can occur irreversible shear degradation,
Degrade in preforation tunnel, pit shaft serious, affect prop-carrying capacity, develop in the pressure break of reservoir in intrinsic fracture and easily cause sand plug.
Crosslinked fracturing fluid degradation effect is poor, and after pressing crack construction, a part of fracturing fluid is percolated into hole and intrinsic fracture, and another part then spreads
Exhibition is in a width of 2-6mm, area more than 1000m2Crack in, it is impossible to gel breaker effective contact, be unfavorable for dredging oily access wall
Passage.Guar fracturing fluid is reduced frictional resistance, is improved prop-carrying capacity using delayed crosslinked method, and its pH value is generally 9-
11, precipitation, blocking hole is also easy to produce with the stratum water of high salinity when therefore mixing, the injury of property oil reservoir quick to alkali is especially tight
Weight.Further, since China does not produce plant guar, the producer's raw material for producing modified guar depends on import, so as to
Cause modified hydropropyl guar fracturing fluid high cost.
Content of the invention
(1) technical problem to be solved
In order to solve the problems referred to above of prior art, the present invention provides a kind of low production cost, viscosity height, prop-carrying capacity
By force, xanthan gum non-crosslinked fracturing fluid of good degrading effect and preparation method thereof.
(2) technical scheme
In order to achieve the above object, the main technical schemes that the present invention is adopted include：
The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 20-25, gelation aid 15-20, clay stabilizer 40-45, antioxidative stabilizer 7-9, antibacterial 1-
1.5th, gel breaker 35-40, pH value regulator 3-7, cleanup additive 40-45 and water 200-500.
Further technical scheme is that the xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 22-24, gelation aid 17-19, clay stabilizer 42-44, antioxidative stabilizer 7.5-8.2, sterilization
Agent 1.1-1.3, gel breaker 36-38, pH value regulator 4-6, cleanup additive 42-44 and water 250-480.
Further technical scheme is, the xanthan gum non-crosslinked fracturing fluid of the present invention, by the material group of following weight portion
Into：
Xanthan gum 23, gelation aid 18, clay stabilizer 43, antioxidative stabilizer 7.8, antibacterial 1.2, gel breaker
37th, pH value regulator 5, cleanup additive 43 and water 390.
Further technical scheme is, gelation aid is konjaku powder；Clay stabilizer be 35% potassium chloride and
65% tetramethyl ammonium chloride；Antioxidative stabilizer is sodium thiosulfate；Antibacterial is formalin；Gel breaker is 72% Ammonium persulfate.
With 28% potassium peroxydisulfate；PH value regulator is strong base-weak acid salt and/or alkali；Cleanup additive is Dodecyl trimethyl ammonium chloride.
Further technical scheme is, pH value regulator be sodium carbonate, sodium bicarbonate and sodium hydroxide in one kind or
Several.
The preparation method of the xanthan gum non-crosslinked fracturing fluid of the present invention, including following step：
S1：To in dry powder blend equipment, the xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidation are steady
Determine agent and gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.08%-0.4%, under stirring, will
The microbicide solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 0.5%-2%, under stirring, by institute
State cleanup additive solution stream to be added in first solution, obtain the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 4%-6% and adjusts agent solution, stirring
Under, pH value regulation agent solution stream is added in second solution, the 3rd solution is obtained；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
Further technical scheme is, in S1, the power of motor of dry powder blend equipment is 18-23 kilowatt, and incorporation time is 4
Hour -7 hours；
In S2, mixing speed is 850-950 rev/min, and mixing time is 2.5-3.5 hours, and flow acceleration is 5.5-7.5
Milliliters/second；
In S3, mixing speed is 1200-1400 rev/min, and mixing time is 3.5-4.5 hours, and flow acceleration is 12-14
Milliliters/second；
In S4, mixing speed is 1150-1250 rev/min, and mixing time is 3-4 hours, and flow acceleration is 17-19 millis
Liter/the second；
In S5, mixing speed is 1350-1500 rev/min, and mixing time is 2-3 hours, and flow acceleration is 15-18 millis
Liter/the second；
The mass fraction of microbicide solution is 0.1%-0.3%；
The mass fraction of cleanup additive solution is 0.8%-1.7%；
It is 4.5%-5.5% that pH value adjusts the mass fraction of agent solution.
Further technical scheme is, in S1, the power of motor of dry powder blend equipment is 20-22 kilowatt, incorporation time
For -6 hours 5 hours；
In S2, mixing speed is 880-920 rev/min, and mixing time is 3-3.3 hours, and flow acceleration is 5.8-6.5 millis
Liter/the second；
In S3, mixing speed is 1300-1350 rev/min, and mixing time is 3.9-4.2 hours, and flow acceleration is 12.8-
13.5 milliliters/seconds；
In S4, mixing speed is 1200-1230 rev/min, and mixing time is 3.2-3.6 hours, and flow acceleration is 17.8-
18.5 milliliters/seconds；
In S5, mixing speed is 1400-1480 rev/min, and mixing time is 2.5-2.8 hours, and flow acceleration is 16.5-
17.5 milliliters/seconds；
The mass fraction of microbicide solution is 0.23%-0.28%；
The mass fraction of cleanup additive solution is 1.1%-1.6%；
PH value adjust agent solution for 4.9-5.1%.
Further technical scheme is, in S1, the power of motor of dry powder blend equipment is 21 kilowatts, and incorporation time is
5.5 hour；
In S2, mixing speed is 900 revs/min, and mixing time is 3.2 hours, and flow acceleration is 6.2 milliliters/seconds；
In S3, mixing speed is 1320 revs/min, and mixing time is 4 hours, and flow acceleration is 13.2 milliliters/seconds；
In S4, mixing speed is 1210 revs/min, and mixing time is 3.4 hours, and flow acceleration is 18.1 milliliters/seconds；
In S5, mixing speed is 1450 revs/min, and mixing time is 2.6 hours, and flow acceleration is 16.8 milliliters/seconds；
The mass fraction of microbicide solution is 0.25%；
The mass fraction of cleanup additive solution is 1.5%；
PH value adjust agent solution for 5.0%.
(3) beneficial effect
The invention has the beneficial effects as follows：Xanthan gum non-crosslinked fracturing fluid that the present invention is provided and preparation method thereof, with height
The characteristics of apparent viscosity, prop-carrying capacity are strong, filter loss is little, can be used for the fracturing reform that alkali is quick, intrinsic fracture develops reservoir.
Description of the drawings
Fig. 1 is the curve that the apparent viscosity of xanthan gum non-crosslinked fracturing fluid is varied with temperature；
Fig. 2 is the curve that the apparent viscosity of xanthan gum non-crosslinked fracturing fluid changes with pH value.
Specific embodiment
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by specific embodiment, to this
Bright it is described in detail.
The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 20-25, gelation aid 15-20, clay stabilizer 40-45, antioxidative stabilizer 7-9, antibacterial 1-
1.5th, gel breaker 35-40, pH value regulator 3-7, cleanup additive 40-45 and water 200-500.
Wherein, gelation aid is konjaku powder, after mixing with xanthan gum solution, can produce in certain concentration range
Collaboration densification；
Clay stabilizer is 35% potassium chloride and 65% tetramethyl ammonium chloride, can be effectively adsorbed in surface of clay, prevent
The injury that water sensitivity mineral hydration swelling and dispersion are migrated and oil-gas Layer is caused；
Antibacterial is formalin, can efficiently control or kill microorganism and pathogenic bacteria；
Gel breaker is 72% Ammonium persulfate. and 28% potassium peroxydisulfate, thoroughly breaks glue to the fracturing fluid for being cross-linked into frozen glue, breaks glue
Residue afterwards is less, is effectively reduced infringement of the fracturing fluid to stratum and proppant flow conductivity；
PH value regulator is strong base-weak acid salt and/or alkali, for adjusting the acid-base value of solution；
Cleanup additive is Dodecyl trimethyl ammonium chloride, and the work residual liquid during fracturing work can be helped to return from stratum
Row, is difficult to result in blockage.
Further, pH value regulator is one or more in sodium carbonate, sodium bicarbonate and sodium hydroxide.
The preparation method of the xanthan gum non-crosslinked fracturing fluid of the present invention, including following step：
S1：To in dry powder blend equipment, the xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidation are steady
Determine agent and gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.08%-0.4%, under stirring, will
The microbicide solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 0.5%-2%, under stirring, by institute
State cleanup additive solution stream to be added in first solution, obtain the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 4%-6% and adjusts agent solution, stirring
Under, pH value regulation agent solution stream is added in second solution, the 3rd solution is obtained；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
Further, in S1, the power of motor of dry powder blend equipment is 18-23 kilowatt, incorporation time be 4 hours -7 little
When；
In S2, mixing speed is 850-950 rev/min, and mixing time is 2.5-3.5 hours, and flow acceleration is 5.5-7.5
Milliliters/second；
In S3, mixing speed is 1200-1400 rev/min, and mixing time is 3.5-4.5 hours, and flow acceleration is 12-14
Milliliters/second；
In S4, mixing speed is 1150-1250 rev/min, and mixing time is 3-4 hours, and flow acceleration is 17-19 millis
Liter/the second；
In S5, mixing speed is 1350-1500 rev/min, and mixing time is 2-3 hours, and flow acceleration is 15-18 millis
Liter/the second；
The mass fraction of microbicide solution is 0.1%-0.3%；
The mass fraction of cleanup additive solution is 0.8%-1.7%；
It is 4.5%-5.5% that pH value adjusts the mass fraction of agent solution.
Embodiment one：
The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 20, gelation aid 15, clay stabilizer 40, antioxidative stabilizer 7, antibacterial 1, gel breaker 35, PH
Value regulator 3, cleanup additive 40 and water 200.
Wherein, gelation aid is konjaku powder；Clay stabilizer is 35% potassium chloride and 65% tetramethyl ammonium chloride；Anti-
Oxidation stabilizers are sodium thiosulfate；Antibacterial is formalin；Gel breaker is 72% Ammonium persulfate. and 28% potassium peroxydisulfate；PH value
Regulator is strong base-weak acid salt and/or alkali；Cleanup additive is Dodecyl trimethyl ammonium chloride.
The preparation method of the xanthan gum non-crosslinked fracturing fluid of the present invention, including following step：
S1：To in dry powder blend equipment, the xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidation are steady
Determine agent and gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.08%, under stirring, is killed described
Microbial inoculum solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 0.5%, under stirring, is helped described
Row's agent solution stream is added in first solution, obtains the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 4% and adjusts agent solution, under stirring, will
The pH value adjusts agent solution stream and is added in second solution, obtains the 3rd solution；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
Further, in S1, the power of motor of dry powder blend equipment is 18 kilowatts, and incorporation time is 4 hours；
In S2, mixing speed is 850 revs/min, and mixing time is 2.5 hours, and flow acceleration is 5.5 milliliters/seconds；
In S3, mixing speed is 1200 revs/min, and mixing time is 3.5 hours, and flow acceleration is 12 milliliters/seconds；
In S4, mixing speed is 1150 revs/min, and mixing time is 3 hours, and flow acceleration is 17 milliliters/seconds；
In S5, mixing speed is 1350 revs/min, and mixing time is 2 hours, and flow acceleration is 15 milliliters/seconds.
Embodiment two：
The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 23, gelation aid 18, clay stabilizer 43, antioxidative stabilizer 7.8, antibacterial 1.2, gel breaker
37th, pH value regulator 5, cleanup additive 43 and water 390.
Wherein, gelation aid is konjaku powder；Clay stabilizer is 35% potassium chloride and 65% tetramethyl ammonium chloride；Anti-
Oxidation stabilizers are sodium thiosulfate；Antibacterial is formalin；Gel breaker is 72% Ammonium persulfate. and 28% potassium peroxydisulfate；PH value
Regulator is strong base-weak acid salt and/or alkali；Cleanup additive is Dodecyl trimethyl ammonium chloride.
Further, pH value regulator is one or more in sodium carbonate, sodium bicarbonate and sodium hydroxide.
The preparation method of the xanthan gum non-crosslinked fracturing fluid of the present invention, including following step：
S1：To in dry powder blend equipment, the xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidation are steady
Determine agent and gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.25%, under stirring, is killed described
Microbial inoculum solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 1.5%, under stirring, is helped described
Row's agent solution stream is added in first solution, obtains the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 5.0% and adjusts agent solution, under stirring,
PH value regulation agent solution stream is added in second solution, the 3rd solution is obtained；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
Further, in S1, the power of motor of dry powder blend equipment is 21 kilowatts, and incorporation time is 5.5 hours；
In S2, mixing speed is 900 revs/min, and mixing time is 3.2 hours, and flow acceleration is 6.2 milliliters/seconds；
In S3, mixing speed is 1320 revs/min, and mixing time is 4 hours, and flow acceleration is 13.2 milliliters/seconds；
In S4, mixing speed is 1210 revs/min, and mixing time is 3.4 hours, and flow acceleration is 18.1 milliliters/seconds；
In S5, mixing speed is 1450 revs/min, and mixing time is 2.6 hours, and flow acceleration is 16.8 milliliters/seconds.
Embodiment three：
The xanthan gum non-crosslinked fracturing fluid of the present invention, by the material composition of following weight portion：
Xanthan gum 25, gelation aid 20, clay stabilizer 45, antioxidative stabilizer 9, antibacterial 1.5, gel breaker 40,
PH value regulator 7, cleanup additive 45 and water 500.
Wherein, gelation aid is konjaku powder；Clay stabilizer is 35% potassium chloride and 65% tetramethyl ammonium chloride；Anti-
Oxidation stabilizers are sodium thiosulfate；Antibacterial is formalin；Gel breaker is 72% Ammonium persulfate. and 28% potassium peroxydisulfate；PH value
Regulator is strong base-weak acid salt and/or alkali；Cleanup additive is Dodecyl trimethyl ammonium chloride.
Further, pH value regulator is one or more in sodium carbonate, sodium bicarbonate and sodium hydroxide.
The preparation method of the xanthan gum non-crosslinked fracturing fluid of the present invention, including following step：
S1：To in dry powder blend equipment, the xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidation are steady
Determine agent and gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.4%, under stirring, is killed described
Microbial inoculum solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 2%, under stirring, by the row of helping
Agent solution stream is added in first solution, obtains the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 6% and adjusts agent solution, under stirring, will
The pH value adjusts agent solution stream and is added in second solution, obtains the 3rd solution；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
Further, in S1, the power of motor of dry powder blend equipment is 23 kilowatts, and incorporation time is 7 hours；
In S2, mixing speed is 950 revs/min, and mixing time is 3.5 hours, and flow acceleration is 7.5 milliliters/seconds；
In S3, mixing speed is 1400 revs/min, and mixing time is 4.5 hours, and flow acceleration is 14 milliliters/seconds；
In S4, mixing speed is 1250 revs/min, and mixing time is 4 hours, and flow acceleration is 19 milliliters/seconds；
In S5, mixing speed is 1500 revs/min, and mixing time is 3 hours, and flow acceleration is 18 milliliters/seconds.
Test example one：
This is tested for detecting xanthan gum non-crosslinked that the embodiment of the present invention one, embodiment two and embodiment three are prepared
Fracturing fluid apparent viscosity at the same temperature, the equipment used by measurement apparent viscosity are FANN-35 type viscometers, test knot
Fruit is shown in Table one.
Table one
By table one as can be seen that at identical temperature, the xanthan gum non-crosslinked fracturing fluid that the embodiment of the present invention two is obtained is showed
Viscosity is highest.
Test example two：
This is tested for detecting xanthan gum non-crosslinked fracturing fluid that the embodiment of the present invention two prepares at different temperatures
Apparent viscosity, it is FANN-35 type viscometers to measure the equipment that used of apparent viscosity, and result of the test is shown in Fig. 1.
As seen from Figure 1, with the rising of temperature, apparent viscosity rapid decrease, when 50 DEG C, apparent viscosity falls to approximately
150mPa S, when temperature continues to raise, apparent viscosity fall is minimum.
Test example three：
This is tested for detecting xanthan gum non-crosslinked fracturing fluid that the embodiment of the present invention two prepares under different PH
Apparent viscosity, it is FANN-35 type viscometers to measure the equipment that used of apparent viscosity, and result of the test is shown in Fig. 2.
From Figure 2 it can be seen that when pH value is in 5-9, less, with the reduction of PH values, viscosity declines the viscosity B coefficent of fracturing fluid
Comparatively fast.
Test example four：
This test tests this by detecting the rate of settling of the haydite in different embodiment xanthan gum non-crosslinked fracturing fluids
The prop-carrying capacity of invention xanthan gum non-crosslinked fracturing fluid, result of the test are shown in Table two.
Table two
The prop-carrying capacity that can be seen that the xanthan gum non-crosslinked fracturing fluid that the embodiment of the present invention two is obtained by table two is best
's.
In sum, xanthan gum non-crosslinked fracturing fluid that the present invention is provided and preparation method thereof, with high apparent viscosity, takes
The characteristics of sand ability is strong, filter loss is little, can be used for the fracturing reform that alkali is quick, intrinsic fracture develops reservoir.
Claims (9)
1. a kind of xanthan gum non-crosslinked fracturing fluid, it is characterised in that by the material composition of following weight portion：
Xanthan gum 20-25, gelation aid 15-20, clay stabilizer 40-45, antioxidative stabilizer 7-9, antibacterial 1-1.5,
Gel breaker 35-40, pH value regulator 3-7, cleanup additive 40-45 and water 200-500.
2. xanthan gum non-crosslinked fracturing fluid as claimed in claim 1, it is characterised in that by the material composition of following weight portion：
Xanthan gum 22-24, gelation aid 17-19, clay stabilizer 42-44, antioxidative stabilizer 7.5-8.2, antibacterial
1.1-1.3, gel breaker 36-38, pH value regulator 4-6, cleanup additive 42-44 and water 250-480.
3. xanthan gum non-crosslinked fracturing fluid as claimed in claim 1 or 2, it is characterised in that by the material group of following weight portion
Into：
Xanthan gum 23, gelation aid 18, clay stabilizer 43, antioxidative stabilizer 7.8, antibacterial 1.2, gel breaker 37, PH
Value regulator 5, cleanup additive 43 and water 390.
4. the xanthan gum non-crosslinked fracturing fluid as described in any one of claim 1-3, it is characterised in that：
The gelation aid is konjaku powder；
The clay stabilizer is 35% potassium chloride and 65% tetramethyl ammonium chloride；
The antioxidative stabilizer is sodium thiosulfate；
The antibacterial is formalin；
The gel breaker is 72% Ammonium persulfate. and 28% potassium peroxydisulfate；
The pH value regulator is strong base-weak acid salt and/or alkali；
The cleanup additive is Dodecyl trimethyl ammonium chloride.
5. xanthan gum non-crosslinked fracturing fluid as claimed in claim 4, it is characterised in that：
The pH value regulator is one or more in sodium carbonate, sodium bicarbonate and sodium hydroxide.
6. a kind of preparation method of xanthan gum non-crosslinked fracturing fluid, it is characterised in that including following step：
S1：The xanthan gum of addition formula ratio, gelation aid, clay stabilizer, antioxidative stabilizer in dry powder blend equipment
And gel breaker, obtain uniform powder after mixing；
S2：The antibacterial of formula ratio is formulated as the microbicide solution that mass fraction is 0.08%-0.4%, under stirring, will be described
Microbicide solution stream is added in the powder of the S1 gained, obtains the first solution；
S3：The cleanup additive of formula ratio is formulated as the cleanup additive solution that mass fraction is 0.5%-2%, under stirring, is helped described
Row's agent solution stream is added in first solution, obtains the second solution；
S4：The pH value regulator of formula ratio is formulated as the pH value that mass fraction is 4%-6% and adjusts agent solution, under stirring, will
The pH value adjusts agent solution stream and is added in second solution, obtains the 3rd solution；
S5：Under stirring, the remaining water of formula ratio is added in the 3rd solution, final products are obtained.
7. the preparation method of xanthan gum non-crosslinked fracturing fluid as claimed in claim 6, it is characterised in that：
In the S1, the power of motor of the dry powder blend equipment is 18-23 kilowatt, and incorporation time is -7 hours 4 hours；
In the S2, mixing speed is 850-950 rev/min, and mixing time is 2.5-3.5 hours, and flow acceleration is 5.5-7.5
Milliliters/second；
In the S3, mixing speed is 1200-1400 rev/min, and mixing time is 3.5-4.5 hours, and flow acceleration is 12-14
Milliliters/second；
In the S4, mixing speed is 1150-1250 rev/min, and mixing time is 3-4 hours, and flow acceleration is 17-19 millis
Liter/the second；
In the S5, mixing speed is 1350-1500 rev/min, and mixing time is 2-3 hours, and flow acceleration is 15-18 millis
Liter/the second；
The mass fraction of the microbicide solution is 0.1%-0.3%；
The mass fraction of the cleanup additive solution is 0.8%-1.7%；
It is 4.5%-5.5% that the pH value adjusts the mass fraction of agent solution.
8. the preparation method of xanthan gum non-crosslinked fracturing fluid as claimed in claim 6, it is characterised in that：
In the S1, the power of motor of the dry powder blend equipment is 20-22 kilowatt, and incorporation time is -6 hours 5 hours；
In the S2, mixing speed is 880-920 rev/min, and mixing time is 3-3.3 hours, and flow acceleration is 5.8-6.5 millis
Liter/the second；
In the S3, mixing speed is 1300-1350 rev/min, and mixing time is 3.9-4.2 hours, and flow acceleration is 12.8-
13.5 milliliters/seconds；
In the S4, mixing speed is 1200-1230 rev/min, and mixing time is 3.2-3.6 hours, and flow acceleration is 17.8-
18.5 milliliters/seconds；
In the S5, mixing speed is 1400-1480 rev/min, and mixing time is 2.5-2.8 hours, and flow acceleration is 16.5-
17.5 milliliters/seconds；
The mass fraction of the microbicide solution is 0.23%-0.28%；
The mass fraction of the cleanup additive solution is 1.1%-1.6%；
The pH value adjust agent solution for 4.9-5.1%.
9. the preparation method of xanthan gum non-crosslinked fracturing fluid as claimed in claim 6, it is characterised in that：
In the S1, the power of motor of the dry powder blend equipment is 21 kilowatts, and incorporation time is 5.5 hours；
In the S2, mixing speed is 900 revs/min, and mixing time is 3.2 hours, and flow acceleration is 6.2 milliliters/seconds；
In the S3, mixing speed is 1320 revs/min, and mixing time is 4 hours, and flow acceleration is 13.2 milliliters/seconds；
In the S4, mixing speed is 1210 revs/min, and mixing time is 3.4 hours, and flow acceleration is 18.1 milliliters/seconds；
In the S5, mixing speed is 1450 revs/min, and mixing time is 2.6 hours, and flow acceleration is 16.8 milliliters/seconds；
The mass fraction of the microbicide solution is 0.25%；
The mass fraction of the cleanup additive solution is 1.5%；
The pH value adjust agent solution for 5.0%.
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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 |
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| 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 |
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