CN108660540A - A kind of pressure break reticular fibre and preparation method thereof - Google Patents
A kind of pressure break reticular fibre and preparation method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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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
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—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
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C09K8/905—Biopolymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
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Abstract
The present invention provides a kind of pressure break reticular fibres and preparation method thereof.The preparation method includes：Sodium carboxymethylcellulose is soluble in water, obtain mixed liquor one；It after initiator is dissolved in water, is added in mixed liquor one, is stirred at 40 DEG C, obtain mixed liquor two；Methylacryoyloxyethyl dimethyl-octa base ammonium bromide is dissolved in the water；Solution is added drop-wise in mixed liquor two；5h 6h are stirred at 40 DEG C, by washing, obtain fracturing fluid reticular fibre.The present invention also provides the pressure break reticular fibres being prepared by above-mentioned preparation method.The reticular fibre of the present invention can be good with fracturing fluid compatibility with rapid dispersion in fracturing fluid, and reticular structure is presented after dispersion in fracturing fluid, so as to improve the sinking speed of proppant, further increases production efficiency.
Description
Technical field
The present invention relates to a kind of fiber more particularly to a kind of reticular fibres of pressure break, belong to technical field of petroleum extraction.
Background technology
Fracturing work includes 2 liquid injection stages.First stage injects prepad fluid, proppant is free of, with certain stream
Amount and pressure are pumped into, and fracturing stratum simultaneously generates crack, plays seam；Second stage injects load fluid, and sand is pumped into out
In the crack opened, crack closure after termination of pumping.During injection and crack closure, the sinking speed of proppant takes sand to fracturing fluid
Ability is affected, and fracturing fluid prop-carrying capacity directly affects the final geometry of supporting crack, and then influences production capacity.
When not having fiber, proppant infall process follows Stokes' law, sinking speed be proportional to grain diameter and
Density is inversely proportional to fluid viscosity.When one timing of proppant particles grain size and density, the too low viscosity of fracturing fluid will lead to proppant
Higher sinking speed, crack closure front support agent will focus on Slit bottom or even proppant particles form group, prevent fluid
It further injects into, therefore proppant cannot be fully populated with crack, influences the prop-carrying capacity of fracturing fluid.On the contrary, after fiber is added, it is micro-
The sedimentation of grain no longer follows Stokes' law, and follows Kynch laws：It settles fiber to interact with particle, prevents particle
Sink；As taking place without for sedimentation to form apparent particle-fluid boundary, on the contrary, fiber-particle mixture is slowly compacted,
Hardly leave fluid.The advantages of Kynch is settled is that fluid viscosity role in reducing particle sinking speed is small.Stoke
This and Kynch sedimentation fibers can reduce decisive action of the base fluid viscosity to sinking speed, and sand energy is taken so as to improve fracturing fluid
Power：When fiber is dispersed in fracturing fluid, the guar gum chain of fiber and reticular structure forms winding arrangement, enhances cross-linked network
The intensity of shape structure reduces the sinking speed of proppant, improves the prop-carrying capacity of fracturing fluid, and proppant substantially uniformity is made to be distributed to
In entire crack, to improve production capacity.
But existing fiber applications in fracturing fluid when, exist：One, fiber bad dispersibility in fracturing fluid；Two, it props up
Support agent the problems such as sinking speed is fast in fiber fracturing liquid.
Invention content
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of pressure break reticular fibre, which exists
Can be good with fracturing fluid compatibility with rapid dispersion in fracturing fluid, production efficiency can be further increased.
In order to achieve the above technical purposes, the present invention provides a kind of preparation method of pressure break reticular fibre, the pressure breaks
Included the following steps with the preparation method of reticular fibre：
The sodium carboxymethylcellulose of 8.5g-10g is dissolved in the water of 450mL-500mL, mixed liquor one is obtained；
It after the initiator of 0.23g-0.26g is dissolved in 45mL-50mL water, is added in mixed liquor one, at 40 DEG C -45 DEG C
15min-20min is stirred, mixed liquor two is obtained；
The methylacryoyloxyethyl dimethyl-octa base ammonium bromide of 3.8g-4g is dissolved in the water of 100mL, solution is obtained；
Solution is added drop-wise in mixed liquor two；
5h-6h is stirred at 40 DEG C -45 DEG C, by washing, obtains the fracturing fluid reticular fibre；
Wherein, methylacryoyloxyethyl dimethyl-octa base ammonium bromide is by 1- bromooctanes and dimethylaminoethyl
Ethyl ester is prepared.
It is highly preferred that the preparation method of the pressure break reticular fibre includes the following steps：
The sodium carboxymethylcellulose of 10g is dissolved in the water of 500mL, mixed liquor one is obtained；
It after the initiator of 0.26g is dissolved in 50mL water, is added in mixed liquor one, stirs 20min at 40 DEG C, mixed
Close liquid two；
The methylacryoyloxyethyl dimethyl-octa base ammonium bromide of 4g is dissolved in the water, the solution of 100mL is obtained；
Solution is added drop-wise in mixed liquor two；
5h-6h is stirred at 40 DEG C, by washing, obtains fracturing fluid reticular fibre.
In above-mentioned preparation method, it is preferable that the raw material group of the methylacryoyloxyethyl dimethyl-octa base ammonium bromide of use
At including：The 1- bromooctanes and 0.198mol-0.205mol of 0.225mol-0.232mol (more preferably 0.23mol) is (more excellent
Be selected as 0.20mol) dimethylaminoethyl methacrylate.
In above-mentioned preparation method, it is preferable that the raw material group of the methylacryoyloxyethyl dimethyl-octa base ammonium bromide of use
At further including catalyst.
In above-mentioned preparation method, it is preferable that the catalyst used is potassium iodide.
In above-mentioned preparation method, it is preferable that when being added drop-wise to solution in mixed liquor two, the time of dropwise addition is 20min-
25min。
In above-mentioned preparation method, it is preferable that the methylacryoyloxyethyl dimethyl-octa base ammonium bromide of use passes through following
Step is prepared：
1- bromooctanes and dimethylaminoethyl methacrylate are mixed, catalyst is added, it is (more excellent at 45 DEG C -50 DEG C
Be selected as 45 DEG C) under stirring 50h-52h (more preferably 52h), obtain white paste；
Xylene solvent is added into white paste, through centrifugal treating, divides and clear liquid is gone to obtain paste sediment, paste is heavy
Starch washs (4-5 times) with benzene, through being dried under reduced pressure, obtains methylacryoyloxyethyl dimethyl-octa base ammonium bromide.
In above-mentioned preparation method, it is preferable that the initiator used is ammonium persulfate.
In above-mentioned preparation method, it is preferable that washing is carried out using ethyl alcohol.
The present invention also provides the pressure break reticular fibres obtained by above-mentioned preparation method.
The preparation method of the pressure break reticular fibre of the present invention, using sodium carboxymethylcellulose have it is good water-soluble and
Biological degradability introduces long-chain hydrophobic monomer methylacryoyloxyethyl dimethyl-octa base ammonium bromide in strand, utilizes
Heat resistance and salt tolerance between polymer molecule makes macromolecular chain be cross-linked to form the space net structure with some strength, in carboxylic first
The cation quaternary ammonium salt that the group containing hydrophobicity is introduced in base sodium cellulosate macromolecular, makes macromolecular other than containing hydrophilic radical,
Also contain cationizable group and carries chain hydrophobic group.
The above-mentioned pressure break reticular fibre of the present invention is when concrete application is used for pressure break, the pressure break liquid-based of every 100 parts by weight
The above-mentioned pressure break reticular fibre of the present invention of -0.18 parts by weight of 0.15 parts by weight is added in liquid.
The preparation method of pressure break reticular fibre through the invention to reticular fibre can be quick in fracturing fluid
Dispersion, it is good with fracturing fluid compatibility, reticular structure is presented after dispersion in fracturing fluid, so as to improve the sinking speed of proppant,
Further increase production efficiency.
Description of the drawings
Influence curve of the dosage to fracturing fluid solid-carrying performance that Fig. 1 is the fiber JX-7 in embodiment.
Influence curve of the dosage to fracturing fluid solid-carrying performance that Fig. 2 is the fiber JX-4 in embodiment.
Fig. 3 is the sinking speed curve graph of each fiber in embodiment.
Specific implementation mode
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but should not be understood as to the present invention can practical range restriction.
Embodiment 1
A kind of preparation method of pressure break reticular fibre is present embodiments provided, following steps are specifically included：
It weighs 10g sodium carboxymethylcelluloses to be put into beaker, 500mL distilled water is added and places for 24 hours, waits for carboxymethyl cellulose
Sodium is completely dissolved, and is subsequently poured into the four-hole boiling flask of 1000mL, and 30min is stirred in electric blender；
Ammonium persulfate 0.26g is weighed as initiator, after being dissolved in 50mL distilled water, is added in four-hole boiling flask, 40
20min is stirred to react at DEG C；
It weighs methylacryoyloxyethyl dimethyl-octa base ammonium bromide 4g and is configured to 100mL solution with distilled water, be transferred to
200mL in liquid funnel；
Above-mentioned matched 100mL solution is added dropwise to four-hole boiling flask, control is dripped in 20min or so, and temperature is constant at 40 DEG C
Continue to be stirred to react 5h-6h, obtain transparent paste, transfer them in beaker, the isolated white of precipitation is washed with ethyl alcohol
Product obtains pressure break reticular fibre (JX-7).
Above-mentioned methylacryoyloxyethyl dimethyl-octa base ammonium bromide is prepared by following steps：
200mL flasks are added in the dimethylaminoethyl methacrylate of the 1- bromooctanes of 0.23mol and 0.20mol
In, a small amount of catalyst potassium iodide is added, 52h is stirred to react at 45 DEG C, obtains the paste of white；
Benzene solvent appropriate is added through centrifugal treating, divides and clear liquid is gone to obtain paste sediment, sediment washs 4-5 with benzene
Time, it is dried through vacuum pump pressure, it is methylacryoyloxyethyl dimethyl-octa base ammonium bromide to obtain white solid.
Correlated performance test is carried out with reticular fibre to the above-mentioned pressure break of the present embodiment
One, it is tested with the compatibility of proppant
Preparing fracturing fluid base fluid is simultaneously sufficiently stirred swelling 2-5h, and the pressure break that 1.5 ‰ -1.8 ‰ the present embodiment are then added is used
Reticular fibre (JX-7), and delayed crosslinker (delay crosslinking time 3-5min), gel breaker and proppant (fracturing fluid are added simultaneously
Sand is hung to get to mixed netted after its is full cross-linked than 30%), being thoroughly mixed uniformly with mechanical agitator
Fiber proppant sample, reticular fibre and proppant are mixed very uniformly.
Two, the research of degradation temperature and measurement
The technological principle of fiber fracturing technology is that fiber is added in fracturing fluid to make the proppants such as quartz sand in fracturing process
Middle holding suspended state, when crack closure, can improve proppant effect, fiber can after pressure break automatic dissolving, to further
Improve the flow conductivity of transformation seam.Therefore, the determination of fiber degradation temperature is played the role of fracturing effect vital.
0.5% guar gum solution is prepared, pH adjusting agent (pH value is adjusted to 9-9.5) is added, solution 200mL is taken to be put into glass
In beaker, the pressure break of the present embodiment is added with reticular fibre (JX-7), makes its dispersion, be then added 0.2 ‰ crosslinking agent and
0.2 ‰ gel breaker.It is fitted into after mixing in sealing steel cylinder, is put into different temperatures roller heating furnace, is observed after 24 hours
It dissolves situation.Experimental result is as shown in table 1.
Table 1
As can be seen from Table 1, the pressure break reticular fibre of the present embodiment is dissolved at 90 DEG C, illustrates that the reticular fibre is suitable for
The pressing crack construction of 2700m-3300m deep-wells.
Three, the solid-carrying performance research in fracturing fluid
(1) fiber fracturing liquid adds the hanging property of sand
The guar gum solution for preparing 0.5% is 9-9.5 with pH adjusting agent adjustment pH value, three parts of 200mL solution is taken to be put into glass
In beaker, it is separately added into JX-2 (acid fiber by polylactic), JX-4 (polylactic acid reticular fibre), JX-7, makes its dispersion, is then added
0.2 ‰ crosslinking agent and 30% sand, hang experiment, the results are shown in Table 2.
Table 2
| Title | Hanging property |
| JX-2 | Choosing property is general, easily broken |
| JX-4 | Choosing property is preferable, and it is more preferable to take sand part |
| JX-7 | Choosing property is good, and it is long to hang the time |
Table 2 as can be seen that fiber JX-2 fracturing fluids add choosing property of sand is poor, hang after break soon；Fiber JX-4 fracturing fluids
Add choosing property of sand preferable；Fiber JX-7 fracturing fluids add choosing property of sand good, and it is long to hang the time.Therefore fiber JX-2 is eliminated, selection is fine
It ties up JX-4 and fiber JX-7 and carries out following experiment.
(2) fiber fracturing liquid adds the outstanding husky performance of sand
Experiment carries out in 25 DEG C of room temperatures, prepares the 0.5% guar gum fracturing base fluid of 200mL, is added according to experiment demand fine
The proppant of peacekeeping 30% adds appropriate crosslinking agent and stirs to form fracturing fluid, by the mixture of fracturing fluid, fiber and proppant
It pours into 250mL graduated cylinders to be placed in room temperature and stands 120min, record proppant obtains settling height in fracturing fluid, and calculates sedimentation
Speed.(sinking speed is equal to settling height divided by sedimentation time)
Influence of the pressure break of the present embodiment with the dosage of reticular fibre JX-7 to fracturing fluid solid-carrying performance as shown in Figure 1, by
Fig. 1 as it can be seen that with reticular fibre JX-7 mass fractions increase, the sinking speed of proppant, which reduces, simultaneously gradually to be stablized, fracturing fluid
Solid-carrying performance gradually increase, reticular fibre JX-7 mass fractions, which are more than 0.15% and can reach, improves fracturing fluid solid-carrying performance
Purpose.
Influence of the dosage of fiber JX-4 to fracturing fluid solid-carrying performance as shown in Fig. 2, Fig. 2 as it can be seen that with fiber JX-4 matter
The increase of score is measured, the sinking speed of proppant reduces and gradually stablizes, and the solid-carrying performance of fracturing fluid gradually increases, fiber JX-4
Mass fraction is more than 0.25% and can reach the purpose for improving fracturing fluid solid-carrying performance, and dosage is excessive, from the economic viewpoint may be used
To eliminate.
Therefore, with fiber in fracturing fluid mass fraction increase, fiber is uniformly dispersed in fracturing fluid, fiber and net
The two glue chain of melon of shape structure forms winding arrangement, enhances the intensity of cross-linked structure, the sinking speed of proppant reduce and by
Gradually stablize, the solid-carrying performance of fracturing fluid gradually increases, and fiber JX-4 dosages are excessive, so eliminating.Therefore, fibrous web-like fiber
The optimum amount of JX-7 is 0.15%-0.18%.
(3) sedimentation of the proppant in fiber fracturing liquid
Experiment carries out in 25 DEG C of room temperatures, prepares the 0.5% guar gum fracturing base fluid of 3 parts of 200mL, is separately added into 0.15%
Fiber JX-2, JX-4 and JX-7 and 30% proppant, add appropriate crosslinking agent and stir to form fracturing fluid, by fracturing fluid, fibre
The mixture of peacekeeping proppant is poured into 250mL graduated cylinders to be placed in room temperature and be stood, and proppant is recorded per half an hour in fracturing fluid
Obtain settling height.
Three kinds of fibers of identical weight are added in the present embodiment, respectively in the decline for being separated by same time and recording proppant
Highly as shown in figure 3, Fig. 3 is as it can be seen that reticular fibre JX-7 decrease speeds are slow compared to fiber JX-2 and fiber JX-4 decrease speeds.
Illustrated with above-described embodiment, the reticular fibre that the preparation method of pressure break reticular fibre through the invention obtains exists
Can be good with fracturing fluid compatibility with rapid dispersion in fracturing fluid, reticular structure is presented after dispersion in fracturing fluid, so as to improve branch
The sinking speed for supportting agent, further increases production efficiency.
Claims (10)
1. a kind of preparation method of pressure break reticular fibre, which is characterized in that the preparation method of the pressure break reticular fibre includes
Following steps：
The sodium carboxymethylcellulose of 8.5g-10g is dissolved in the water of 450mL-500mL, mixed liquor one is obtained；
It after the initiator of 0.23g-0.26g is dissolved in 45mL-50mL water, is added in the mixed liquor one, at 40 DEG C -45 DEG C
15min-20min is stirred, mixed liquor two is obtained；
The methylacryoyloxyethyl dimethyl-octa base ammonium bromide of 3.8g-4g is dissolved in 100mL water, solution is obtained；
The solution is added drop-wise in the mixed liquor two；
5h-6h is stirred at 40 DEG C -45 DEG C, by washing, obtains the fracturing fluid reticular fibre；
Wherein, the raw material composition of the methylacryoyloxyethyl dimethyl-octa base ammonium bromide includes：1- bromooctanes and methyl
Dimethylaminoethyl acrylate.
2. preparation method according to claim 1, which is characterized in that the methylacryoyloxyethyl dimethyl-octa bromide
The raw material of change ammonium, which forms, includes：The 1- bromooctanes of 0.225mol-0.232mol and the metering system of 0.198mol-0.205mol
Sour dimethylaminoethyl.
3. preparation method according to claim 1, which is characterized in that the methylacryoyloxyethyl dimethyl-octa bromide
The raw material composition for changing ammonium further includes catalyst.
4. preparation method according to claim 3, which is characterized in that the catalyst is potassium iodide.
5. preparation method according to claim 1, which is characterized in that the time of the dropwise addition is 20min-25min.
6. according to claim 1-4 any one of them preparation methods, which is characterized in that the methylacryoyloxyethyl diformazan
Base octyl ammonium bromide is prepared by following steps：
1- bromooctanes and dimethylaminoethyl methacrylate are mixed, catalyst is added, 50h- is stirred at 45 DEG C -50 DEG C
52h obtains white paste；
Xylene solvent is added into the white paste, through centrifugal treating, divides and clear liquid is gone to obtain paste sediment, paste is heavy
Starch is washed with benzene, through being dried under reduced pressure, obtains the methylacryoyloxyethyl dimethyl-octa base ammonium bromide.
7. preparation method according to claim 6, which is characterized in that the additive amount of dimethylbenzene is 50mL.
8. preparation method according to claim 1, which is characterized in that the initiator is ammonium persulfate.
9. preparation method according to claim 1, which is characterized in that the washing is carried out using ethyl alcohol.
10. a kind of pressure break reticular fibre, which is characterized in that the pressure break is by any one of claim 1-9 with reticular fibre
What the preparation method was prepared.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109762540A (en) * | 2018-12-20 | 2019-05-17 | 中国石油集团川庆钻探工程有限公司 | Supermolecule sealing agent and preparation method thereof |
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