CN103741466B - A kind of pressure break modified fibre and preparation technology - Google Patents
A kind of pressure break modified fibre and preparation technology Download PDFInfo
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- CN103741466B CN103741466B CN201310698383.XA CN201310698383A CN103741466B CN 103741466 B CN103741466 B CN 103741466B CN 201310698383 A CN201310698383 A CN 201310698383A CN 103741466 B CN103741466 B CN 103741466B
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- 230000004048 modification Effects 0.000 claims abstract description 78
- 238000012986 modification Methods 0.000 claims abstract description 78
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 238000000967 suction filtration Methods 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 17
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 24
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- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims description 8
- YXGOYRIWPLGGKN-UHFFFAOYSA-N 2,3-ditert-butylbenzene-1,4-diol Chemical compound CC(C)(C)C1=C(O)C=CC(O)=C1C(C)(C)C YXGOYRIWPLGGKN-UHFFFAOYSA-N 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
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- 230000008901 benefit Effects 0.000 abstract description 4
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
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- 239000003431 cross linking reagent Substances 0.000 description 3
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
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Abstract
The invention discloses a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 40 ~ 60, fiber surface modification agent: 45 ~ 85; The preparation technology of this pressure break modified fibre, it comprises the following steps: S1. selects base fiber: described base fiber meets the following conditions: fibre density 0.93 ~ 1.85g/cm
3, fibre length 2 ~ 14mm, fibre tensile strength 15 ~ 3000MPa, fibre diameter 15 ~ 150 μm; S2. pressure break fiber surface modification agent is prepared; S3. weigh; S4. surface modification; S5. suction filtration; S6. dry.The present invention, by carrying out the modified surface property that significantly can improve fiber to base fiber, makes fiber can fully disperse in a solvent, adds the roughness of fiber surface simultaneously, improve the hydrophobicity of fiber; The preparation technology of pressure break modified fibre provided by the invention has the advantage that step is simple, easy to operate, cost is low.
Description
Technical field
The invention belongs to oil-gas field development pressing crack construction Material Field, specifically relate to a kind of pressure break modified fibre and preparation technology.
Background technology
The conventional fracturing technology existence high speed row of returning and proppant backflow affect the contradiction that gas well is normally produced, particularly in gas reservoir development process, have a large amount of high pressure high gas rate wells, these high pressure high gas rate well proppant backflow problem of shaking out is more outstanding, during discharge opeing after pressure, production test and adopt initial stage (the about 1-3 month) of gas transmission, have an appointment 50% well (layer) there is proppant backflow in various degree, proppant backflow amount is generally at 1m
3within, minority well is more than 1m
3, even reach 3m
3.Because gas well pressure is high, output is high, flow velocity is fast, the hazard ratios such as proppant backflow is shaked out quite strong to the erosion attack effect of well head and ground flow pipeline gate valve, ground installation, the sand thorn erosion attack of generation are larger.Gas well shakes out and reduces bubble row technological effect, reduces the production time efficiency of gas well, rate about 0.5% when estimating to affect gas well liquid loading because shaking out, and has had a strong impact on the normal production of gas well, and there is serious potential safety hazard.
For the problems referred to above, domestic and international new development fiber fracturing technology, it forms space net structure by the interaction between fiber and proppant and provides support cohesive force extra between agent and crack, thus proppant is stabilized in home position, and fluid can freely pass through.After fracturing fluid starts the row of returning, due to washing away of fluid flowing, just there is plasticity shearing deformation in proppant particles, forms a series of domes; The fiber axial force that during discharge opeing, the detrusion of sand arch is brought out can resist the detrusion of sand arch, thus improves the stability of sand arch and critical discharge speed, is conducive to controlling returning of proppant and tells; Fiber does not interact with fracturing fluid, and to the not requirement of temperature, pressure and closed-in time.Can discharge speed be improved after pressure, shorten the row's of returning time, improve the row of returning and lead.
For ensureing that fiber fracturing technology is constructed smoothly and will obtain better effects, pressure break fiber should possess in clear water and have in the fracturing fluid base fluid of viscosity and have preferably from dispersibility, fiber forms spacial framework thus reaches auxiliary outstanding sand ability in dispersion process, fiber itself needs to have the requirements such as certain size, diameter, density and tensile strength simultaneously, should not have a negative impact in addition as performances such as crosslinked for fracturing fluid, the broken glue of material for pressing crack construction.In fiber fracturing construction fiber surface property can on its dispersiveness in fracturing fluid, whether form network structure and make a significant impact, current conventional fibre can not meet above-mentioned requirements, therefore need to carry out surface modification to it, through retrieval, there is not the relevant report of pressure break fiber being carried out to surface modification.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of pressure break modified fibre is provided, by carrying out the modified surface property that significantly can improve fiber to base fiber, fiber can be fully disperseed in a solvent, add the roughness of fiber surface simultaneously, improve the hydrophobicity of fiber; Another object of the present invention is to the preparation technology providing a kind of pressure break modified fibre, this preparation technology has the advantage that step is simple, easy to operate, cost is low.
Object of the present invention is achieved through the following technical solutions: a kind of pressure break modified fibre, and it is prepared from by the raw material of following weight parts:
Base fiber: 40 ~ 60, fiber surface modification agent: 45 ~ 85;
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 20 ~ 32; Perfluorinated alkoxy vinyl ether: 8 ~ 18;
Antioxidant: 1 ~ 5; Water-based fluorine acrylic emulsion: 6 ~ 12;
Ethylene glycol: 5 ~ 15; Isopropyl alcohol: 13 ~ 58.
Described antioxidant is one or both in 2,6-di-tert-butyl-4-methy phenol, ditert-butylhydro quinone.
Described base fiber is one or more in polypropylene fibre, polyester fiber, polyimide fiber, vinal, polyacrylonitrile fibre.
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: pressure break fiber surface modification agent is moved in there-necked flask, heat flask and rapid stirring solution, make solution warms to 40 ~ 55 DEG C, in there-necked flask, add base fiber, fully stir 80 ~ 100min under constant temperature, described thermostat temperature is 40 ~ 55 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 65 ~ 75 DEG C, described drying time is 22 ~ 26h, obtains the pressure break fiber of surface modification.
The present invention has the following advantages: after the agent of the present invention's fiber surface modification carries out modification to base fiber, can significantly improve fiber surface performance, to a certain degree improve fibre density, for fiber can fully disperse to lay a good foundation in a solvent; Add the roughness of fiber surface simultaneously, fiber surface is made to have hydrophobicity, therefore fiber can form spacial framework in water, formed " skeleton " that auxiliary fracturing fluid gel hangs sand, and modified fiber is to of the fracturing fluid serviceability, as base fluid viscosity, broken colloidality energy, pump-conveying property etc. is become not to produce any negative effect; This preparation technology has the advantage that step is simple, easy to operate, cost is low.
Accompanying drawing explanation
Fig. 1 is the pressure break fiber schematic diagram not carrying out modification;
Fig. 2 is modified pressure break fiber schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, and protection scope of the present invention is not limited to the following stated.
Embodiment 1: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: polypropylene fibre: 40, fiber surface modification agent: 45.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 20; Perfluorinated alkoxy vinyl ether: 8;
2,6-di-tert-butyl-4-methy phenol: 1; Water-based fluorine acrylic emulsion: 6;
Ethylene glycol: 5; Isopropyl alcohol: 13.
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 0.93g/cm
3, fibre length: 2mm,
Fibre tensile strength: 15MPa, fibre diameter: 15 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 40 DEG C, add base fiber, fully stir 80min under constant temperature in there-necked flask, described thermostat temperature is 40 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 65 DEG C, described drying time is 22h, obtains the pressure break fiber of surface modification.
Embodiment 2: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 60, fiber surface modification agent: 85;
Described base fiber is polypropylene fibre and polyester fiber, and weight ratio is 2:1.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 32; Perfluorinated alkoxy vinyl ether: 18;
Ditert-butylhydro quinone: 5; Water-based fluorine acrylic emulsion: 12;
Ethylene glycol: 5; Isopropyl alcohol: 58.
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 1.85g/cm
3, fibre length: 14mm,
Fibre tensile strength: 3000MPa, fibre diameter: 150 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 55 DEG C, add base fiber, fully stir 100min under constant temperature in there-necked flask, described thermostat temperature is 55 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 75 DEG C, described drying time is 26h, obtains the pressure break fiber of surface modification.
Embodiment 3: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 40, fiber surface modification agent: 85; Described base fiber is polypropylene fibre, polyester fiber and polyimide fiber, and weight ratio is 3:2:1.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 22; Perfluorinated alkoxy vinyl ether: 12;
Antioxidant: 2; Water-based fluorine acrylic emulsion: 8;
Ethylene glycol: 8; Isopropyl alcohol: 18;
Described antioxidant is 2,6-di-tert-butyl-4-methy phenol, ditert-butylhydro quinone, and weight ratio is 4:1.
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 1.25g/cm
3, fibre length: 4mm,
Fibre tensile strength: 50MPa, fibre diameter: 30 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 42 DEG C, add base fiber, fully stir 85min under constant temperature in there-necked flask, described thermostat temperature is 45 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 68 DEG C, described drying time is 23h, obtains the pressure break fiber of surface modification.
Embodiment 4: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 50, fiber surface modification agent: 75; Described base fiber is polypropylene fibre, polyester fiber, polyimide fiber and vinal, and weight ratio is 4:3:2:2.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 25; Perfluorinated alkoxy vinyl ether: 14;
Antioxidant: 3; Water-based fluorine acrylic emulsion: 10;
Ethylene glycol: 10; Isopropyl alcohol: 25;
Described antioxidant is 2,6-di-tert-butyl-4-methy phenol, ditert-butylhydro quinone, and weight ratio is 1:2.The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 1.45g/cm
3, fibre length: 6mm,
Fibre tensile strength: 100MPa, fibre diameter: 75 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 45 DEG C, add base fiber, fully stir 92min under constant temperature in there-necked flask, described thermostat temperature is 48 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 70 DEG C, described drying time is 24h, obtains the pressure break fiber of surface modification.
Embodiment 5: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 52, fiber surface modification agent: 62; Described base fiber is polypropylene fibre, polyester fiber, polyimide fiber, vinal and polyacrylonitrile fibre, and weight ratio is 1:1.5:3:3.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 28; Perfluorinated alkoxy vinyl ether: 16;
2,6-di-tert-butyl-4-methy phenol: 4; Water-based fluorine acrylic emulsion: 10;
Ethylene glycol: 12; Isopropyl alcohol: 36.
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 1.60g/cm
3, fibre length: 10mm,
Fibre tensile strength: 800MPa, fibre diameter: 98 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 52 DEG C, add base fiber, fully stir 98min under constant temperature in there-necked flask, described thermostat temperature is 52 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 72 DEG C, described drying time is 25h, obtains the pressure break fiber of surface modification.
Embodiment 6: a kind of pressure break modified fibre, it is prepared from by the raw material of following weight parts: base fiber: 55, fiber surface modification agent: 70; Described base fiber is polypropylene fibre, vinal and polyacrylonitrile fibre, and weight ratio is 5:2:2.
Described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 30; Perfluorinated alkoxy vinyl ether: 15;
Ditert-butylhydro quinone: 2.5; Water-based fluorine acrylic emulsion: 11;
Ethylene glycol: 8; Isopropyl alcohol: 46;
The preparation technology of above-mentioned pressure break modified fibre, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 1.75g/cm
3, fibre length: 12mm,
Fibre tensile strength: 1000MPa, fibre diameter: 120 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent by formula rate;
S4. surface modification: move in there-necked flask by pressure break fiber surface modification agent, heat flask and rapid stirring solution, make solution warms to 36 DEG C, add base fiber, fully stir 96min under constant temperature in there-necked flask, described thermostat temperature is 52 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 70 DEG C, described drying time is 22h, obtains the pressure break fiber of surface modification.
Embodiment 7: performance evaluation
1. experiment material
The base fiber of embodiment 6 and the pressure break fiber of surface modification is adopted to be tested object.
2. key property evaluation: comprise observation, measure density, length, diameter, experimental result is as shown in table 1.
Table 1: key property evaluation result
As shown in Table 1: unmodified fibre density, length, diameter are respectively 1.291g/cm
3, 6.2mm, 38 μm, its density of fiber adopting surface modifying agent to cross, length, diameter are respectively 1.302g/cm
3, 6.2mm, 38 μm, show: before modified, the basic physics index of fiber is substantially constant.
3. on the impact of fracturing fluid plastic, broken colloidality energy
A. preparing fracturing fluid
Formula is: 0.40% hydroxypropyl guar gum+0.3% bactericide+0.5% clay stabilizer+0.5% cleanup additive+0.2% sodium carbonate
B. measure
In experiment, crosslinking agent used is the organic borate cross-linker of 0.4%; Broken colloidality energy activity rating adopts persulfate activity rating method, and testing persulfate used is ammonium persulfate, and concentration is 200ppm, and experimental result is as shown in table 2.
Table 2. fiber is on the impact of fracturing fluid crosslinking time, broken colloidality energy
As shown in Table 2: the fiber that surface modification is crossed can substantially without impact on fracturing fluid crosslinking time, broken colloidality.
4. dispersed experiment
A. base fluid and frozen glue is prepared
Base fluid formula is: 0.40% hydroxypropyl guar gum+0.3% bactericide+0.5% clay stabilizer+0.5% cleanup additive+0.2% sodium carbonate
Frozen glue formula is: 0.40% hydroxypropyl guar gum+0.3% bactericide+0.5% clay stabilizer+0.5% cleanup additive+0.2% sodium carbonate+0.4% organic boron
B. measure
Joined respectively by the fiber of modification in clear water, base fluid, frozen glue three kinds of solution, the addition of fiber is 0.5% of solution weight, and observe the dispersiveness of fiber in three kinds of solution respectively, result is as shown in table 3.
The dispersed result of table 3. fiber in clear water, base fluid and frozen glue
| Liquid title | Dispersed |
| Clear water | Fiber dispersion is good, without the sinkage that obviously floats; |
| Base fluid | Fiber is thread dispersed, without agglomerating phenomenon, without floating, sinkage |
| Frozen glue | Fiber dispersion is even, and hanging property of frozen glue is good, viscoplasticity is good, smooth |
As shown in Table 3: the dispersiveness of modified fiber in clear water, base fluid and frozen glue is all better, for fiber fracturing construction is laid a good foundation.
5. auxiliary outstanding sand aptitude tests
A. base fluid is prepared
Base fluid formula is: 0.40% hydroxypropyl guar gum+0.3% bactericide+0.5% clay stabilizer+0.5% cleanup additive+0.2% sodium carbonate; Crosslinking agent: 0.4% organic boron
B. method of testing
Get 400mL base fluid to wide-mouth bottle, first add crosslinking agent, then add haydite (particle diameter 0.425 ~ 0.850mm, density 1.78g/cm according to the sand ratio of 30%
3) and the fiber (in advance through manual dispersion) of 0.5% haydite weight, add in wide-mouth bottle by load weighted haydite and fiber fast, the wide-mouth bottle then rocking rapidly sealing makes haydite and fiber mix in fracturing fluid.Left standstill by outstanding sand fracturing fluid after mixing, observe haydite sedimentation situation, do the fracturing fluid not adding fiber is contrast simultaneously.
C. experimental result: as shown in table 4.
The auxiliary outstanding sand aptitude tests result of table 4. fiber
As shown in Table 4,0h, 2h, 10h, 50h, 120h, do not add haydite height in the wide-mouth bottle of fiber and be respectively: 9.7cm, 9.7cm, 7.2cm, 5.5cm, 3.6cm; Add haydite height in the wide-mouth bottle of the fiber of modification to be respectively: 9.7cm, 9.7cm, 9.6cm, 9.2cm, 8.5cm, add haydite height in the wide-mouth bottle of unmodified fiber and be respectively: 9.7cm, 9.5cm, 9.0cm, 7.2cm, 6.5cm.Result shows: add modified fiber relative to not adding fiber, and its outstanding sand ability significantly strengthens.
6. on short-term flow conductivity impact test
Metering system is API linear flow, and measuring media is deionized water, and sanding concentration is 10kg/m
2concrete measuring method is: take intermediate density haydite according to sanding concentration and sand ratio, be mixed with the fracturing fluid gel containing modified fibre, at 90 DEG C after broken glue (0.02% ammonium persulfate), breaking glue solution is filtered with 180 order normal test sieves, oversize is transferred to diversion chamber and strikes off, test the flow conductivity at 25 DEG C with deionized water, experimental result is as shown in table 5.
Table 5: the fiber of modification affects test result to short-term flow conductivity
As shown in Table 5: the fiber adding modification with do not add fiber flow conductivity, penetration value under identical clossing pressure and change not quite, illustrate and add modified fiber opposite flow ability and permeability almost without impact.
Can find out from above-mentioned experiment: improved fiber can produce superpower suspended and sand carrying and proppant crystallized ability, after adding fiber, this novel fiber Sand Fracturing Technology can realize quick, the efficient row of returning of fractured well, fundamentally prevents proppant backflow to shake out and formation sand production; The long-term flow conductivity that can effectively keep man-made fracture higher, extends the volume increase term of validity; Excellent outstanding sand ability can be provided under low stick part, suppress that seam is high excessively to be extended simultaneously effectively, ensure that proppant to be satisfied back-up sand and make slit in payzone section, longer supporting crack, the longer volume increase term of validity can be obtained when adding sand scale and being identical.
Claims (4)
1. a pressure break modified fibre, it is prepared from by the raw material of following weight parts:
Base fiber: 40 ~ 60, fiber surface modification agent: 45 ~ 85,
It is characterized in that, described fiber surface modification agent is made up of the raw material of following weight parts:
Vinyl silanes: 20 ~ 32; Perfluorinated alkoxy vinyl ether: 8 ~ 18;
Antioxidant: 1 ~ 5; Water-based fluorine acrylic emulsion: 6 ~ 12;
Ethylene glycol: 5 ~ 15; Isopropyl alcohol: 13 ~ 58.
2. a kind of pressure break modified fibre as claimed in claim 1, is characterized in that, described antioxidant is one or both in 2,6-di-tert-butyl-4-methy phenol, ditert-butylhydro quinone.
3. a kind of pressure break modified fibre as claimed in claim 1, is characterized in that, described base fiber is one or more in polypropylene fibre, polyester fiber, polyimide fiber, vinal, polyacrylonitrile fibre.
4. the preparation technology of a kind of pressure break modified fibre as described in claim 1 or 2 or 3, it is characterized in that, it comprises the following steps:
S1. base fiber is selected: described base fiber meets the following conditions:
Fibre density: 0.93 ~ 1.85g/cm
3,
Fibre length: 2 ~ 14mm,
Fibre tensile strength: 15 ~ 3000MPa,
Fibre diameter: 15 ~ 150 μm;
S2. the agent of pressure break fiber surface modification is prepared: by above-mentioned formulated, for subsequent use;
S3. weigh: weigh base fiber and fiber surface modification agent according to the above ratio;
S4. surface modification: pressure break fiber surface modification agent is moved in there-necked flask, heat flask and rapid stirring solution, make solution warms to 40 ~ 55 DEG C, in there-necked flask, add base fiber, fully stir 80 ~ 100min under constant temperature, described thermostat temperature is 40 ~ 55 DEG C;
S5. suction filtration: move on filter paper by the base fiber after step S4 surface modification, carries out suction filtration to it after being cooled to normal temperature;
S6. dry: dried by the baking oven that the fiber after suction filtration is placed in 65 ~ 75 DEG C, described drying time is 22 ~ 26h, obtains the pressure break fiber of surface modification.
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| CN104405360B (en) * | 2014-10-27 | 2018-02-27 | 中石化胜利油田分公司采油工艺研究院 | A kind of fracturing process for improving fracturing fluid solid-carrying performance |
| CN105086987B (en) * | 2015-08-31 | 2018-06-01 | 中国石油天然气股份有限公司 | Fiber surface treating agent, preparation method and use method thereof, and fiber for fracturing fluid |
| CN113913176A (en) * | 2020-07-08 | 2022-01-11 | 中国石油化工股份有限公司 | Fracturing fluid and method for fracturing in shale by using same |
| CN111961460B (en) * | 2020-09-22 | 2021-08-03 | 西南石油大学 | High-efficiency energy-saving bridge channel fully-coupled fiber proppant system and application method thereof |
| CN115058241B (en) | 2022-07-19 | 2023-07-07 | 成都劳恩普斯科技有限公司 | Structure stabilizer for efficient laying technology of fracturing well propping agent and preparation method |
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