CN109749731A - A kind of preparation method of pressure break overlay film proppant - Google Patents
A kind of preparation method of pressure break overlay film proppant Download PDFInfo
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- CN109749731A CN109749731A CN201910032344.3A CN201910032344A CN109749731A CN 109749731 A CN109749731 A CN 109749731A CN 201910032344 A CN201910032344 A CN 201910032344A CN 109749731 A CN109749731 A CN 109749731A
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Abstract
The invention belongs to the technical field of compositions for reinforcing rupturing, specifically disclose a kind of preparation method of pressure break overlay film proppant, comprising the following steps: (1) prepare raw material；(2) water is added in reaction kettle, heats up；(3) it stirs, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, multi-enamine, dimethyl diallyl ammonium chloride is then added and continues to stir after raw material is added；(4) when temperature of charge is stablized at 65-75 DEG C, initiator is added in stirring, continues to stir 4-7min；(5) drag reducer, discharging after the drag reducing efficiency of drag reducer reaches 25% or more are obtained after reacting 3.5-4.5h；It does not reach requirement, sodium hydroxide solution is added and is adjusted；(6) it is 0.8-1.5:100 by the mass parts ratio of drag reducer and proppant ontology, drag reducer is mixed with proppant ontology, drag reducer is made to be covered on the surface of proppant ontology, obtains pressure break overlay film proppant.The pressure break that this programme is prepared has good drag reduction and suspension with overlay film proppant.
Description
Technical field
The invention belongs to for reinforcing rupturing technical field of compositions more particularly to a kind of pressure break supported with overlay film
The preparation method of agent.
Background technique
Fracturing propping agents, which refer to, brings crack into fracturing fluid, after pressure is released to support the liquid in oil field crack to help
Agent can be provided to crack and support and guarantee that its is unimpeded, flowed into liquid in drilling by crack, prevent from being caused due to crack
The collapsing and leakage of hole oil drilling.
Ideal fracturing propping agent for oil gas well requires have high carrying capacity and high sand ratio, it is therefore desirable to alap
Density and intensity as high as possible.Traditional fracturing propping agents have quartz sand and haydite and their coated products, outer layer to cover
Film is solidified at high temperature with phenolic aldehyde or epoxy resin, and generally in the 5-50% of amount of resin, coated temperature exists the amount of curing agent
230 degree or so, traditional fracturing propping agents intensity is big, but density is also high, and suspension is poor, is easy precipitating, it is not easy to be taken
It is brought into well.
In order to more effectively make fracturing propping agents reach the target position of well, need to prepare carrying liquid during pressure break.
Carrying liquid is using water as decentralized medium, and addition thickening agent, additive are formulated thereto, mainly uses three kinds of water-soluble polies
Object is closed as thickening agent, i.e. natural plant gum (guar gum, sesbania, konjaku etc.), cellulose derivative and synthetic polymer, adds thickening agent
Equal substances can be improved the viscosity for carrying liquid, while reduce the frictional resistance for carrying liquid.Successful fracturing work requires to carry liquid except tool
Have outside higher viscosity, be also required to break glue rapidly, the row of returning rapidly after operation, frictional resistance is lower during pumping, while will also be through
It helps feasible.There are at high cost, environmental pollutions serious to reservoir damage for thickening agent, the additive added in existing carrying liquid
Big disadvantage, and the broken feelings that glue is not thorough, the row of returning is inefficient are found in actual application using existing carrying liquid
Condition still has.Using the pressure break mode that clear water takes sand can fundamentally solve it is above-mentioned cause serious pollution to the environment, broken glue is not thorough, is returned
Row leads not high problem, but clear water takes sand there are a unavoidable disadvantage-pumping frictional resistance height, and pumping frictional resistance height is to construction
Operation brings great difficulty.
Summary of the invention
The purpose of the present invention is to provide a kind of pressure break preparation method of overlay film proppant, the pressure break being prepared is with covering
Film proppant is able to solve clear water sand pump and send frictional resistance high problem.
In order to achieve the above object, base case of the invention are as follows: a kind of preparation method of pressure break overlay film proppant, packet
Include following steps:
(1) prepare following raw material: water, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, multi-enamine, dimethyl two
Allyl ammonium chloride, initiator and proppant ontology；
(2) water is added in reaction kettle, is warming up to 65-75 DEG C；
(3) then acrylamide, 2- acrylamido -2- is successively added in the material in stirred autoclave into reaction kettle
Methyl propane sulfonic acid, multi-enamine, dimethyl diallyl ammonium chloride after raw material is added, continue to stop after stirring 15-20min；
(4) when the temperature of charge of step (3) is stablized at 65-75 DEG C, continue to stir, initiator is added；It then proceedes to stir
Stop after mixing 4-7min；
(5) drag reducer is obtained after reacting 3.5-4.5h, detects the drag reducing efficiency of drag reducer, drag reducing efficiency goes out after reaching 25% or more
Material；Drag reducing efficiency does not reach requirement, and concentration is added and is adjusted for the sodium hydroxide or potassium hydroxide solution of 1.0-1.5%, until
It is qualified；
It (6) is 0.8-1.5:100 by the mass parts ratio of drag reducer and proppant ontology, by drag reduction made from step (5)
Agent is mixed with proppant ontology, and drag reducer is made to be covered on the surface of proppant ontology, obtains pressure break overlay film proppant.
The beneficial effect of this base case is:
1, the pressure break of this programme is by acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, more with overlay film proppant
The polymerizable raw materials such as enamine, dimethyl diallyl ammonium chloride generate drag reducer, then cover one layer on the surface of proppant ontology
What drag reducer was formed.The raw material pole for preparing the drag reducer of this programme is worthy of careful study, through applicants have found that, only selection 2- propylene
It is adjustable that good fluidity, drag reducing efficiency could be made in the raw materials such as amide groups -2- methyl propane sulfonic acid, dimethyl diallyl ammonium chloride
Drag reducer.Dimethyl diallyl ammonium chloride belongs to the cationic monomer of high charge density, with acrylamide, 2- acrylamide
After the copolymerization of base -2- methyl propane sulfonic acid, quaternary ammonium group group is introduced into drag reducing agent composition, thus there is extremely strong polarity and right
The affinity of anionic property substance, thus guarantee that the drag reducing agent composition being prepared has preferable mobility, good stream
Dynamic property is to guarantee that drag reducer can be successfully crucial in proppant body surface overlay film, and other raw materials is used to substitute dimethyl diene
The mobility of propyl ammonium chloride, drag reducer is poor, and when covering drag reducer to proppant ontology, drag reducer cannot be covered on branch well
Support the surface of agent ontology.It is also that this programme is made that 2- acrylamide-2-methylpro panesulfonic acid, which is selected, as one such raw material
One factor of drag reduction agent key, according to drag reduction principle it is known that drag reduction effect mainly by surfactant or
It is high molecular polymer to realize.Therefore 2- acrylamide-2-methylpro panesulfonic acid and acrylamide, multi-enamine, diformazan are selected
Base diallyl ammonium chloride is copolymerized, and sulfonic acid group is introduced into drag reducing agent composition, is passed through after the completion of polymerization reaction
The sodium hydroxide or potassium hydroxide solution of 1.0-1.5% is added, sulfonic acid group is neutralized, is obtained containing sodium sulfonate or potassium sulfonate base
The polymer of group, the drag reducer ultimately generated are polymer types of surfactants, can effectively achieve the purpose that drag reduction.
2, drag reducer modest viscosity made from this programme step (5), mobility is good, drag reducer and the mixing of proppant ontology
When, drag reducer can be good at the surface for being covered on proppant ontology, form pressure break of the invention overlay film proppant.And it uses
Existing drag reducer, such as lotion drag reducer, which cannot can only be added carrying liquid in proppant ontology overlay film, drag reducer
Middle use.
3, the pressure break of this programme overlay film proppant is put into clear water, the drag reducer energy of pressure break overlay film proppant surface
It is quickly dissolved in clear water, drag reduction is carried out to clear water, drag reducing efficiency can be up to 62.8%, have very good resistance reducing performance.
Drag reducer not only makes pressure break overlay film proppant have anti-drag function, does not influence other performances of pressure break overlay film proppant also,
Such as density, breaking capacity, acid solubility, turbidity, suspension time etc..
4, it when carrying out pressing crack construction using existing proppant, needs the thickeners such as drag reducer, water and guar gum are common
Be configured to carry liquid, using the carrying liquid by proppant transport into oil field.Carrying liquid need to be cooperated to make using existing proppant
With application method is complex, and it is more troublesome to carry liquid extemporaneous preparation process.And use the pressure break overlay film branch of this programme
When supportting agent progress pressing crack construction, pressure break is directly sent into pumping vehicle group with overlay film proppant and clear water by a certain percentage, by pumping
Proppant and clear water are pumped directly into oil field by vehicle group, and application method is simple, and eliminate the trouble of preparing fracturing fluid.
5, such as documented by step (5), drag reducer is made using raw materials such as acrylamides, when the drag reducer being prepared subtracts
When resistance rate does not reach requirement, concentration is added and is adjusted for the sodium hydroxide or potassium hydroxide solution of 1.0-1.5%, drag reduction can be made
The drag reducing efficiency of agent meets actual demand.Existing drag reducer once completes, drag reducing efficiency be it is relatively-stationary, can not carry out
Adjustment, once drag reducing efficiency is undesirable, the drag reducer of preparation is not available, and will cause great waste.And the present invention program
In drag reducer, drag reducing efficiency can also be adjusted after preparation, it can be ensured that drag reducing efficiency meets the requirements, and avoids drag reducer because not
It can use and lead to the problem of the wasting of resources.
Further, described water 720-760 parts, 60-80 parts of acrylamide, 2- acrylamide-2-methylpro panesulfonic acid 70-90
Part, 20-40 parts of multi-enamine, 70-90 parts of dimethyl diallyl ammonium chloride and 4-6 parts of initiator.
Existing some emulsion-type drag reducers, which also have, uses acrylamide as one of raw material, and in addition to water third
The dosage of acrylamide is most.It prepares this programme drag reducer to be used and significantly reduces the dosage of acrylamide, acryloyl
Amine, 2- acrylamide-2-methylpro panesulfonic acid, dimethyl diallyl ammonium chloride three ratio in, what acrylamide occupied
Dosage is less than 1/3, by the type and dosage that control raw material, it is ensured that the drag reducer of this programme has performance in need, such as viscous
Spend it is moderate, with good mobility, the surface that can preferably be covered on proppant ontology, there is good drag reduction etc..
Inventor is by prolonged test discovery, and within the above range by the dosage control of raw material, manufactured drag reducer can be fine
Be covered on the surface of proppant ontology, and last obtained pressure break is preferable with overlay film proppant comprehensive performance.
Further, 740 parts of the water, 70 parts of acrylamide, 80 parts of 2- acrylamide-2-methylpro panesulfonic acid, multi-enamine
30 parts, 80 parts of dimethyl diallyl ammonium chloride and 5 parts of initiator.It tests discovery for a long time by inventor, selects above-mentioned
Pressure break overlay film proppant is made in the raw material of mass fraction, and proppant obtained is put into clear water, and clear water takes the drag reduction effect of sand
Fruit is best, and proppant can be preferably suspended in clear water, and suspension is also fabulous.
Further, in the step (6), the mass parts ratio of drag reducer and proppant ontology is 1:100.By drag reducer with
The mass parts ratio of proppant ontology is control in 1:100, and the effect of overlay film is preferable.
Further, the multi-enamine selects diethylenetriamine, triethylene diamine, vinylamine, diethylene diamine, triethylene four
One of amine is a variety of.By inventor the study found that selecting the multi-enamine of above-mentioned raw materials, the drag reducer being prepared is combined
Object effect is preferable.
Further, the initiator selects ammonium persulfate, potassium peroxydisulfate, any one in sodium peroxydisulfate.With above-mentioned original
Material is used as initiator, and resultant effect is preferable.
Further, the proppant ontology is made of the raw material of following mass fraction: 100 parts of aggregate, 0.5-10 parts of resin
With 0.15-5 parts of curing agent.
Further, the aggregate selects any one in haydite, quartz sand, artificial sand or reclaimed sand.
Further, the resin selects epoxy resin, phenolic resin, polyurethane resin, any in acrylic resin
It is a kind of.
Further, the curing agent selects one of amine, anhydride, isocyanates, methenamine.
Further, the proppant ontology includes aggregate and the coating layer that is wrapped in outside aggregate, and coating layer is by resin, solidification
Agent, catalyst and aminated compounds are prepared；The mass fraction of the resin is the 0.5-3% of aggregate quality number, catalysis
The mass fraction of agent is the 0.1-1% of resin quality number；The mass fraction of curing agent is polyalcohols resin quality number
40-80%.
Using the proppant ontology of this programme, more loose cotton can be formed in water body in proppant ontology investment water
Wadding gathers shape, can suspend in clear water.The pressure break of this programme overlay film proppant, its essence is cover on the surface of proppant ontology
One layer of drag reduction film base-material has been covered, pressure break overlay film proppant has been put into water, the drag reduction film base-material on surface is dissolved into rapidly water
In, it contacts this physical efficiency of proppant with water to form loose cotton wadding and gather shape, will not influence its suspension.The pressure break of this programme
Good resistance reducing performance and suspendability have been had both with overlay film proppant.
Further, the resin is polyalcohols resin, and the equivalent of polyalcohols resin hydroxyl is 60-300.
Further, polyalcohols resin selects one of polymer such as ethyl alcohol, ethylene glycol, propylene glycol, glycerine, propyl alcohol
Or it is several.
Further, the curing agent specifically selects toluene di-isocyanate(TDI), methylenediphenyl diisocyanates, different Fo Er
One of ketone diisocyanate, methyl diphenylene diisocyanate are several.
Further, the mass fraction of the aminated compounds is the 1-20% of resin quality number；The aminated compounds
For one of diethylenetriamine, triethylamine, ethamine, triethylene tetramine, ethylenediamine or several.
Further, the catalyst is the organo-metallic compound of alkyls tin and/or the organometallic of alkyl ekalead
Close one or more of object；The organo-metallic compound of alkyls tin specifically selects dibutyl tin dilaurate, tributyl tin,
The organo-metallic compound of alkyl ekalead specifically selects lead tetraethide, isooctyl acid lead.
Specific embodiment
The raw material selected in embodiment is illustrated below, and pressure break overlay film branch is described in detail by taking embodiment 1 as an example
The preparation method of agent is supportted, embodiment 2, embodiment 3 and comparative example 1-6 embody in table 1, unshowned part and 1 phase of embodiment
Together；
Embodiment 4, embodiment 5, comparative example 7 are determined according to hereafter record.
Proppant ontology in embodiment can be the fracturing propping agents bought in the market, can also be using aggregate, resin and
The resin coated propping agent that curing agent is prepared, preparing resin used in resin coated propping agent can be selected epoxy resin, phenol
Urea formaldehyde, polyurethane resin, any one in acrylic resin, when resin selects epoxy resin, corresponding curing agent choosing
With amine, anhydride；When resin selects phenolic resin, corresponding curing agent selects methenamine；When resin selects polyurethane tree
Rouge or acrylic resin, corresponding curing agent select isocyanates.
Proppant ontology in embodiment can be also the proppant sheet made of aggregate and the coating layer being wrapped in outside aggregate
Body, coating layer are prepared by resin, curing agent, catalyst and aminated compounds；It is polyalcohols tree used herein of resin
Rouge (one of polymer such as ethyl alcohol, ethylene glycol, propylene glycol, glycerine, propyl alcohol or several), curing agent is specifically selected here
Toluene di-isocyanate(TDI), methylenediphenyl diisocyanates, isophorone diisocyanate, methyl diphenylene diisocyanate
One of or it is several.
Embodiment 1
Present embodiment discloses a kind of pressure break preparation methods of overlay film proppant, comprising the following steps:
(1) prepare following raw material: 740 parts of water, 70 parts of acrylamide, 80 parts of 2- acrylamide-2-methylpro panesulfonic acid, more
30 parts of enamine, 80 parts of dimethyl diallyl ammonium chloride and 5 parts of initiator；Wherein initiator selects ammonium persulfate, multi-enamine choosing
Use vinylamine.In the present embodiment, proppant ontology is made of the raw material of following mass fraction: 100 parts of aggregate, 5 parts of resin
With 2 parts of curing agent；Wherein aggregate selects 30/50 quartz sand, and resin selects phenolic resin, and curing agent selects methenamine.
(2) water is added in reaction kettle, is warming up to 70 DEG C；
(3) acrylamide, 2- acrylamido -2- methyl is successively added in the material in stirred autoclave into reaction kettle
Propane sulfonic acid, vinylamine, dimethyl diallyl ammonium chloride after raw material is added, continue to stop after stirring 20min；
(4) after the temperature for the material that step (3) obtains is stablized to 70 DEG C, continue to stir, ammonium persulfate is added；Continue to stir
Stop after mixing 5min；
(5) drag reducer is obtained after polymerization reaction 4h, detects the drag reducing efficiency of drag reducer, drag reducing efficiency goes out after reaching 25% or more
Material；Drag reducing efficiency does not reach requirement, and 1% sodium hydroxide solution is added and is adjusted, until qualified；
(6) proppant ontology is prepared using aggregate, resin and curing agent according to existing method；Detailed process are as follows: first by bone
Material is heated to 80-230 DEG C, adds resin, and 10-20 seconds plus curing agent take the dish out of the pot for mulling 30-50 seconds, and proppant ontology is made；
It (7) is 1:100 by the mass parts ratio of drag reducer and proppant ontology, by drag reducer made from step (5) and step
Suddenly proppant ontology made from (6) is mixed, and drag reducer is made to be covered on the surface of proppant ontology, obtains pressure break overlay film branch
Support agent.
Table 1
Embodiment 4
Embodiment 4 the difference from embodiment 1 is that: in the present embodiment, proppant ontology includes aggregate and being wrapped in bone
Coating layer outside material, coating layer are prepared by resin, curing agent, catalyst and aminated compounds.Wherein aggregate selects 30/50
Quartz sand, resin select alcohol polymer, and curing agent selects methyl diphenylene diisocyanate, and catalyst selects isooctyl acid lead,
Aminated compounds selects ethylenediamine.Wherein 100 parts of aggregate, 2.5 parts of resin, 2 parts of curing agent, 0.02 part of catalyst, amine chemical combination
0.3 part of object；
The preparation process of proppant ontology in corresponding step (6) are as follows: aggregate is heated to 95 DEG C, resin and catalysis is added
Agent is mixed；85 DEG C are dropped to temperature, aminated compounds is added, is stirred；75 DEG C are dropped to temperature, curing agent is added,
It is mixed；Temperature drops to 50 DEG C, takes the dish out of the pot, and be supported agent ontology.
Embodiment 5
Embodiment 5 the difference from embodiment 1 is that: in the present embodiment, proppant ontology includes aggregate and being wrapped in bone
Coating layer outside material, coating layer are prepared by resin, curing agent, catalyst and aminated compounds.Wherein aggregate selects 30/50
Quartz sand, resin select glycerine polymer, and curing agent selects toluene di-isocyanate(TDI), and catalyst selects tributyl tin, amine
Compound selects diethylenetriamine.Wherein 100 parts of aggregate, 3 parts of resin, 2 parts of curing agent, 0.02 part of catalyst, aminated compounds
0.3 part；
The preparation process of proppant ontology in corresponding step (6) are as follows: aggregate is heated to 105 DEG C, resin is added and urges
Agent is mixed；95 DEG C are dropped to temperature, aminated compounds is added, is stirred；75 DEG C are dropped to temperature, solidification is added
Agent is mixed；Temperature drops to 50 DEG C, takes the dish out of the pot, and be supported agent ontology.
Comparative example 7
This comparative example the difference from embodiment 1 is that: in this comparative example using acrylamide substitute 2- acrylamido -2-
Methyl propane sulfonic acid.
The drag reducer of embodiment 1-5, comparative example 1-7, pressure break are tested with overlay film proppant, obtain following data,
It is as shown in table 2:
Table 2
(explanation: the set quota in table 2 is the common index of applied drag reducer, fracturing propping agents at present.)
Analyze conclusion:
(1) mobility that can be seen that embodiment 1-5 drag reducer from the data of table 2 is good, and (product appearance is thick uniform
It is liquid, flowable), resistance reducing performance it is good (drag reducing efficiency is 49% or more), it follows that the drag reducer of the present invention program can be compared with
The good surface for being covered on proppant ontology, drag reducer are that proppant brings good resistance reducing performance, use the pressure of this programme
It splits and can effectively solve the problem that problem that clear water sand pump send frictional resistance high with overlay film proppant.Meanwhile the pressure break overlay film of embodiment 1-5
The performances such as percentage of damage, the acid solubility of proppant are also preferable, and drag reduction film base-material not only makes proppant have anti-drag function, also not shadow
Ring other performances of proppant, such as density, breaking capacity, acid solubility, turbidity, suspension time etc..
(2) it by the data of embodiment 1 respectively compared with comparative example 1, comparative example 2, can be seen that pair according to the record of table 2
Ratio 1, the mobility of 2 drag reducer of comparative example are lost, and drag reducing efficiency is also well below the drag reducer of embodiment 1, it follows that increasing
The dosage of big acrylamide, can reduce the mobility of drag reducer and reduce the drag reducing efficiency of drag reducer.By the data of embodiment 1 point
Not with comparative example 3, comparative example 4 compare, comparative example 3,4 drag reducer of comparative example drag reducing efficiency well below embodiment 1 drag reducer.
The data deducibility of Comprehensive Correlation example 1-4: acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, dimethyl diallyl chlorine
Dosage, the ratio for changing the raw materials such as ammonium require, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, dimethyl diene
The ratio of the raw materials matter such as propyl ammonium chloride is undesirable, will affect the performances such as drag reducer drag reducing efficiency, mobility.
(3) data of embodiment 1 and the data of comparative example 5 are compared, the drag reducer of comparative example 5 is gelinite, nothing
Mobility, it follows that selecting dimethyl diallyl ammonium chloride as one of raw material is to improve drag reducer mobility
It is crucial.
(4) data of embodiment 1 and the data of comparative example 6 are compared, under the drag reducing efficiency of 6 drag reducer of comparative example is very big
Drop, drag reducing efficiency does not reach requirement (25%), it follows that drag reduction of the 2- acrylamide-2-methylpro panesulfonic acid to drag reducer
Can have a great impact.
(5) acrylamide and 2- acrylamide-2-methylpro panesulfonic acid are the substance that property is closer to, and are all anion
Monomer selects acrylamide substitution 2- acrylamide-2-methylpro panesulfonic acid to obtain comparative example 7.By the data of embodiment 1 with it is right
The data of ratio 7 compare, the drag reducing efficiency considerable decrease of 7 drag reducer of comparative example, it follows that selecting 2- acrylamido-
2- methyl propane sulfonic acid is an important factor for improving the resistance reducing performance of drag reducer as one of raw material.
Claims (16)
1. a kind of pressure break preparation method of overlay film proppant, which comprises the following steps:
(1) prepare following raw material: water, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, multi-enamine, two allyl of dimethyl
Ammonium chloride, initiator and proppant ontology；
(2) water is added in reaction kettle, is warming up to 65-75 DEG C；
(3) then acrylamide, 2- acrylamido -2- methyl is successively added in the material in stirred autoclave into reaction kettle
Propane sulfonic acid, multi-enamine, dimethyl diallyl ammonium chloride after raw material is added, continue to stop after stirring 15-20min；
(4) when the temperature of charge of step (3) is stablized at 65-75 DEG C, continue to stir, initiator is added；Then proceed to stirring 4-
Stop after 7min；
(5) drag reducer is obtained after reacting 3.5-4.5h, detects the drag reducing efficiency of drag reducer, discharging after drag reducing efficiency reaches 25% or more；
Drag reducing efficiency does not reach requirement, and concentration is added and is adjusted for the sodium hydroxide or potassium hydroxide solution of 1.0-1.5%, until closing
Lattice；
(6) be 0.8-1.5:100 by the mass parts ratio of drag reducer and proppant ontology, by drag reducer made from step (5) with
Proppant ontology is mixed, and drag reducer is made to be covered on the surface of proppant ontology, obtains pressure break overlay film proppant.
2. a kind of preparation method of pressure break overlay film proppant according to claim 1, it is characterised in that: the water 720-
760 parts, 60-80 parts of acrylamide, 70-90 parts of 2- acrylamide-2-methylpro panesulfonic acid, 20-40 parts of multi-enamine, dimethyl two
70-90 parts and initiator 4-6 parts of allyl ammonium chloride.
3. a kind of preparation method of pressure break overlay film proppant according to claim 2, it is characterised in that: the water 740
Part, 70 parts of acrylamide, 80 parts of 2- acrylamide-2-methylpro panesulfonic acid, 30 parts of multi-enamine, dimethyl diallyl ammonium chloride
80 parts and 5 parts of initiator.
4. a kind of preparation method of pressure break overlay film proppant according to claim 1-3, it is characterised in that: institute
It states in step (6), the mass parts ratio of drag reducer and proppant ontology is 1:100.
5. a kind of preparation method of pressure break overlay film proppant according to claim 4, it is characterised in that: the multi-enamine
Select one of diethylenetriamine, triethylene diamine, vinylamine, diethylene diamine, triethylene tetramine or a variety of.
6. a kind of preparation method of pressure break overlay film proppant according to claim 5, it is characterised in that: the initiator
Select ammonium persulfate, potassium peroxydisulfate, any one in sodium peroxydisulfate.
7. a kind of preparation method of pressure break overlay film proppant according to claim 6, it is characterised in that: the proppant
Ontology is made of the raw material of following mass fraction: 100 parts of aggregate, 0.5-10 parts of resin and 0.15-5 parts of curing agent.
8. a kind of preparation method of pressure break overlay film proppant according to claim 7, it is characterised in that: the aggregate choosing
With any one in haydite, quartz sand, artificial sand or reclaimed sand.
9. a kind of preparation method of pressure break overlay film proppant according to claim 8, it is characterised in that: the resin choosing
With any one in epoxy resin, phenolic resin, polyurethane resin, acrylic resin.
10. a kind of preparation method of pressure break overlay film proppant according to claim 9, it is characterised in that: the solidification
One of amine, anhydride, isocyanates, methenamine are selected in agent.
11. a kind of preparation method of pressure break overlay film proppant according to claim 6, it is characterised in that: the support
Agent ontology includes aggregate and the coating layer that is wrapped in outside aggregate, and coating layer is by resin, curing agent, catalyst and aminated compounds system
It is standby to obtain；The mass fraction of the resin is the 0.5-3% of aggregate quality number, and the mass fraction of catalyst is resin quality part
Several 0.1-1%；The mass fraction of curing agent is the 40-80% of polyalcohols resin quality number.
12. a kind of preparation method of pressure break overlay film proppant according to claim 11, it is characterised in that: the resin
For polyalcohols resin, the equivalent of polyalcohols resin hydroxyl is 60-300.
13. a kind of preparation method of pressure break overlay film proppant according to claim 12, it is characterised in that: polyalcohols
Resin selects one of polymer such as ethyl alcohol, ethylene glycol, propylene glycol, glycerine, propyl alcohol or several.
14. a kind of preparation method of pressure break overlay film proppant according to claim 13, it is characterised in that: the solidification
Toluene di-isocyanate(TDI), methylenediphenyl diisocyanates, isophorone diisocyanate, diphenyl methane are specifically selected in agent
One of diisocyanate is several.
15. a kind of preparation method of pressure break overlay film proppant according to claim 14, it is characterised in that: the amine
The mass fraction of compound is the 1-20% of resin quality number；The aminated compounds is diethylenetriamine, triethylamine, second
One of amine, triethylene tetramine, ethylenediamine are several.
16. a kind of preparation method of pressure break overlay film proppant according to claim 15, it is characterised in that: the catalysis
Agent is one or more of organo-metallic compound and/or organo-metallic compound of alkyl ekalead of alkyls tin；Alkyl
The organo-metallic compound of class tin specifically selects dibutyl tin dilaurate, tributyl tin, the Organometallic compounds of alkyl ekalead
Object specifically selects lead tetraethide, isooctyl acid lead.
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| CN115822546A (en) * | 2022-12-16 | 2023-03-21 | 中国矿业大学(北京) | Construction method for directionally embedding time-limited dissolution backflow-prevention proppant into fracturing crack |
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