CN106147746A - A kind of be applied to riverfrac treatment system from suspended prop - Google Patents

Abstract

The application belongs to oil-gas mining technical field, be specifically related to a kind of be applied to riverfrac treatment system there is the higher proppant from suspending power.Should prepare through starch gelatinization, hydrogel from suspended prop, prepared compounded resin, prepare multiple steps such as proppant and be prepared from.Compared to existing proppant product, the restriction that the present invention has broken away from and has been necessarily dependent upon guanidine glue when conventional proppants uses, friction reducer uses.Proppant provided by the present invention is when it uses, directly by natural water by corresponding for proppant transport stratum.Proppant product provided by the present invention, can not only preferably reduce pressure break cost during oil-gas mining, and due to the preferable environmental-protecting performance of material, the infringement to ground environment during oil-gas mining can be reduced, have the advantage of the oil and gas production that improves plus it, thus there is preferable application value.

Description

A kind of be applied to riverfrac treatment system from suspended prop

Technical field

The application belongs to oil-gas mining technical field, be specifically related to a kind of be applied to riverfrac treatment system have higher from The proppant of suspending power.

Background technology

Nineteen forty-seven hydraulic fracturing technology applies to fracturing engineering in the U.S. first, and its main technical principle is: hypotonicity Mineral deposit is under the conditions of high clossing pressure, and Oil gas-containing rock layer is opened by pressure break, and the oil gas contained in mineral deposit is able to from pressure break formation Crack is collected outflow, thus realizes the exploitation of oil gas.Through the developing history of nearly 70 years, current hydraulic fracturing technology was Become the production technique of a kind of maturation and be widely used in oil-gas mining.

For avoiding the geology during oil-gas mining to subside, proppant is crucial material indispensable in pressing crack construction process Material.20th century 50～the sixties, successively there are metallic aluminium ball, baton round, walnut shell, glass bead etc. in proppant material, but Along with the development of fracturing technique, and the increase of exploitation difficulty, original proppant material the most gradually can not meet pressure break Construction requirement.

In prior art, as mainly quartz sand and ceramsite sand two class of the proppant of oil field compression fracture construction.Quartz sand As petroleum fracturing propping agent, on the one hand there is the advantage that density is relatively low, construction pumping is convenient, cheap；The opposing party Mask also has that intensity is relatively low, sphericity and surface smoothness is low, Oil Guide permeance property is poor, oil production is relatively low open defect.Pottery Granule mainly with fine aluminum Alumina, coal etc. as raw material, is prepared from by multiple tracks technique, and this proppant tool is high-quality high-strength bright Aobvious feature, and flow conductivity and decay resistance good.The most this proppant has the most significantly increases oil and gas production Technical advantage, as the use of high alumina proppant agent is remarkably improved oil and gas production 30%～50%.Plus using ceramsite sand proppant The length of service of oil well can be obviously prolonged, thus ceramsite sand is essential in the exploitation of current low-permeability oil gas well, construction Key material.

But it is during practice of construction, even if ceramsite sand proppant there is also certain defect, as this in high alumina proppant The apparent density of ceramsite sand is relatively big, to such an extent as to is necessarily dependent upon the organic materials such as guanidine glue during wellfracturing to improve fracturing fluid Viscosity, and the organic material prices such as guanidine glue are costly, and usage amount is relatively big, so that pressing crack construction is relatively costly.With Time, when using ceramsite sand proppant, there is also some more significantly formation fractures target areas and be prone to pile up, and then cause sedimentation Easily cause the defect of formation contaminant, thus develop new proppant product and remain there is highly important using value 's.

Summary of the invention

Present invention aim at providing a kind of be applicable to riverfrac treatment system, there is the higher proppant from suspending power Product, thus overcome in existing proppant product that organic material usage amount is big, cost is high to a certain extent, to easily cause environment dirty The defect of dye, it is simple to oil-gas mining construction application.

Details are as follows for the technical solution used in the present invention.

A kind of be applied to riverfrac treatment system from suspended prop, should from suspended prop be multiple structure, by interior extremely It is followed successively by outward aggregate kernel, hybrid resin protective layer and hydrogel layer, is prepared from through following steps:

(1) preparing gelatinized starch, specifically, use sodium hydroxide to be modified and gelatinizing starch, described gelatinizing is concretely The starch solution that there was added sodium hydroxide is incubated 1 ~ 2h at 70 DEG C ~ 90 DEG C；

Described starch is soluble starch, concrete such as in corn starch, wheaten starch, sweet potato starch, potato starch Plant or the mixture of several arbitrary proportion；

In preparation process, in terms of mass fraction, sodium hydroxide: starch=1:30；Under preferable case, first starch is prepared as quality Mark 10% aqueous solution carries out gelatinizing again；

(2) preparing hydrogel material, detailed process is:

Under the conditions of nitrogen atmosphere, in reactor, it is sequentially added into the gelatinized starch prepared by emulsifying agent, thiacyclohexane, step (1), AM (acrylamide), carbamide, under the conditions of 60 DEG C ~ 70 DEG C waters bath with thermostatic control, stir reaction 20 ~ 40min；

After reaction terminates, ammonia regulation pH value is to pH=7 ~ 8；

Add initiator stirring reaction 2 ~ 3h；

Precipitate with ethanol, and use washing with acetone precipitate, after 40 DEG C ~ 60 DEG C vacuum drying, be hydrogel material crude product；

Further, hydrogel material crude product glacial acetic acid-ethylene glycol mixture is carried out soxhlet type, remove homopolymer, be dried, Hydrogel material finished product it is after pulverizing；Described glacial acetic acid-ethylene glycol mixture is the mixed liquor of volume ratio 60:40, i.e. with body Long-pending ratio meter, glacial acetic acid: ethylene glycol=60:40；

In preparation process, AM(acrylamide) with 33% mass fraction aqueous solution, each material amounts is,

Emulsifying agent: thiacyclohexane: the gelatinized starch prepared by step (1): AM(acrylamide): carbamide: initiator=4g:150mL: 10g:180mL:0.5g:1.32g；

Described emulsifying agent is one or two kinds of arbitrary proportion mixture in span, tween, described span be specially span-20, Span-40, span-60, span-65 or span-80, described tween is polysorbas20, polysorbate40, polysorbate60 or Tween 80；

Described initiator is one or two kinds of arbitrary proportion mixture in persulfate, bisulfites, described persulfuric acid Salt is potassium peroxydisulfate, Ammonium persulfate. or sodium peroxydisulfate, and described bisulfites is sodium sulfite or bisulfite amine；

(3) compounded resin is prepared, particularly as follows: after thermoplastic resin and Colophonium are mixed, be warming up to 70 DEG C ~ 100 DEG C and melt, stirring Under the conditions of mixing 1 ~ 2h, be compounded resin；

In preparation process, in terms of mass fraction, thermoplastic resin: Colophonium=2 ~ 6:7；Under preferable case, thermoplastic resin: Colophonium= 3:7；

Described thermoplastic resin is one or more arbitrary proportion mixture in phenolic resin, epoxy resin, phenol-formaldehyde resin modified；

(4) preparation of aggregate kernel, specifically, by aggregate inner core particles drying for standby；Described aggregate kernel is preferably 20 ~ 40 mesh Sintering low-density ceramsite；

(5) preparing proppant, detailed process is:

Dried aggregate kernel in step (4) is put in puddle mixer, 150 DEG C～230 DEG C, under stirring condition, be sequentially added into Compounded resin, amine curing agent, silane coupler, plasticizer in step (3), after stirring, add dispersant, be uniformly dispersed Hydrogel material prepared in rear addition step (2)；

When under cryogenic conditions, (70 DEG C ~ 80 DEG C) continue to be evenly stirred until proppant appearance obvious dispersion phenomenon (about about 15min), Discharging, cools down, sieves, and i.e. derives from suspended prop；

In preparation process, in terms of mass fraction, each material amounts is,

Aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel=100:4 ~ 8:0.5 ~ 1.0:0.05 ~ 0.2:0.2 ~ 0.3:0.1 ~ 0.4:0.2 ~ 1.5；

Under preferable case, aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel= 100:4:0.8:0.18:0.2:0.2:1；

Described amine curing agent is one or more in triethylene tetramine, hexamethylenetetramine, diethylenetriamine, TEPA Arbitrary proportion mixture；

Described silane coupler is aminopropyl triethoxysilane (KH550), glycidyl ether oxygen propyl trimethoxy silicane (KH560) one or more arbitrary proportion mixture or in methacryloxypropyl trimethoxy silane (KH570)；

Described plasticizer is adjacent benzene-type dicarboxylic acid esters, specifically such as dimethyl phthalate, dibutyl phthalate, adjacent benzene two One or more arbitrary proportion mixture in formic acid di-isooctyl；

Described dispersant is one or both arbitrary proportion mixture in calcium stearate, zinc stearate.

Existing suspended prop product, when relating to covering material, also has employing natural macromolecular material or water solublity high Molecule, the advantage of this kind of covering material, without after-treatment, can directly apply to produce, but its shortcoming is the brightest Aobvious, shortcoming essentially consists in this kind of macromolecular material under formation water environment, and its water absorbing properties can be severely impacted, and in turn results in Sedimentation velocity increases, and is likely to form obstruction.The present invention is directed to this kind of covering material and be optimized design, gathered by secondary Close the hydrogel obtaining modification, by improving its salt resistant character, add its improvement based on environmentally friendly raw material, thus produce Ground environment finally will not be produced and pollute and infringement by product, adds that coating technique is simple, thus can be laminated the most frugally and be cleaved into This.

In a word, inventor is by raw-material continuous screening and improvement, and optimizes manufacturing condition, Be successfully prepared a kind of there is relatively higher suspension ability and stable performance can be used for producing from suspended prop of riverfrac treatment system Product.Compared to existing proppant product, the present invention has broken away from and has been necessarily dependent upon guanidine glue when conventional proppants uses, friction reducer uses Restriction.Proppant provided by the present invention is when it uses, directly by natural water by corresponding for proppant transport stratum, defeated During sending, after hydrogel layer (coating layer) imbibition of proppant surface, there is broken glue, concurrent fracturing stratum, and hydrogel The internal layer wrapped up occurs exposed, and the aggregate in internal layer forms supporting role to the fairway in stratum, adds internal layer material Good oleophilic drainage performance, can preferably improve the oil pump capacity of crude oil, and as the Colophonium of support frame, due to its excellent leading Stream ability, thus the exploitation of beneficially oil gas.In general, proppant product provided by the present invention, can not only preferably reduce oil Pressure break cost in gas recovery process, and due to the preferable environmental-protecting performance of material, can reduce during oil-gas mining ground environment Infringement, add that its tool improves the advantage of oil and gas production, thus there is preferable application value.

Detailed description of the invention

Below in conjunction with embodiment the present invention will be further explained explanation, before introducing specific embodiment, to following reality Execute in example involved partial material and detection equipment, examination criteria is briefly discussed below.

Raw materials for production:

Colophonium, GB 10# oil building asphalt (packed), Maoming City Wei Long petrochemical industry company limited product；

Thermoplastic resin (bisphenol A epoxide resin), amine curing agent (triethylene tetramine), be Hunan Ba Ling petrochemical industry epoxy resin Technology development co. product；

Polyacrylamide, the water soluble polymer employed in the conventional proppants of prior art, for liking gloomy (SNF FLOERGER ) Products；

Dispersant (calcium stearate), for Zhengzhou Guan Da chemical products company limited product；

((KH550) is Henan Hong Jia chemical products company limited product to silane coupler；

Ammonia, analytical pure, sell company limited purchased from Henan Phaeton chemical products, be adjusted to 5% concentration during use and (just using Really)；

Acrylamide (AM), hexamethylene, initiator (Ammonium persulfate .), sodium hydroxide, be analytical pure, be purchased from Tianjin section close Europe chemical reagent company limited；

Emulsifying agent (span-80), purchased from Cologne, Chengdu chemical reagent company limited；

Examination criteria

About the test from the bulk density of suspended prop, apparent density and percentage of damage all according to " SY/ in following embodiment T5108-2006 fracturing propping agents performance indications and test recommendation method " it is measured；Flow conductivity is according to " SY/T6302- Method is recommended in 2009 fracturing propping agents filling bed short-term flow conductivity evaluations " it is measured.

Embodiment 1

Riverfrac treatment system that what the present embodiment was provided be applied to from suspended prop, use following steps to be prepared from:

(1) preparing gelatinized starch, specifically, add deionized water in corn starch, the starch being prepared as 10% mass fraction is molten Liquid, adds 1g sodium hydroxide, 80 DEG C of water bath with thermostatic control 2h in 300mL starch solution, is gelatinized starch after being cooled to room temperature；

In this step, in terms of mass fraction, starch: sodium hydroxide=30:1.

(2) preparing hydrogel material, detailed process is:

First, reaction unit is installed, specifically, install agitator, reflux condenser, thermometer, nitrogen in 500mL four-neck flask Gas inlet/outlet pipe and Dropping funnel；

Secondly, under the conditions of 65 DEG C of waters bath with thermostatic control, in four-necked bottle, it is sequentially added into 4g emulsifying agent (span-80), 150mL thiacyclohexane, Logical such as N₂Oxygen is driven in stirring, and speed of agitator controls at 600rpm/min；

3rd, the 10g gelatinized starch prepared by addition step (1), 180mL mass fraction are the AM(acrylamide of 33%) water Solution, micro urea (0.5g), under the conditions of nitrogen atmosphere, continuously stirred reaction 30min；

4th, with the pH=8 of ammonia (about 1g) regulation reaction system, add 1.32g initiator (Ammonium persulfate .), be stirred for anti- Answer 2.5h；

5th, product ethanol is precipitated, and uses washing with acetone precipitate, after 40 DEG C ~ 60 DEG C vacuum drying, obtain hydrogel material thick Product；

Finally, with glacial acetic acid: ethylene glycol=60:40(volume ratio) mixed liquor soxhlet type 4h, remove homopolymer, be dried, pulverize After be hydrogel material finished product.

Water soluble polymer (8,000,000 molecular weight, anion poly-third to prepared hydrogel material Yu conventional proppants Acrylamide, SNF FLOERGER) carry out Electronic Speculum and take pictures (JEOL-JSM-5510LV type scanning electron microscope), result such as Fig. 1 Shown in.

In Fig. 1, left side is the electron micrograph of the water soluble polymer of suspended prop in prior art, it is seen that its There is multi-layer fiber layer structure, and surface slightly cavernous structure.

Right side electron micrograph of hydrogel material prepared by the present embodiment in Fig. 1, it can be seen that its surface is not It is that there are as water soluble polymer in prior art some independent long-chains, but on semi-rigid skeleton, has been grafted many branches The water soluble polymer branch chain of strip, thus form spatial networks loose structure, and part has linear structure.And due to these The existence of branch chain so that the common water soluble polymer of its surface area ratio is much greater.

Difference based on above-mentioned physical arrangement, can make employing hydrogel material provided herein prepare suspended prop During, the proppant that suspending power is more superior can be obtained, and its suspending power is the most more stable.

(3) compounded resin is prepared, particularly as follows: by thermoplastic resin (bisphenol A epoxide resin) and Colophonium according to mass ratio 3:7 After ratio mixing, being warming up to 100 DEG C and melt, under stirring condition, mixing 1h, is compounded resin；

(4) aggregate inner core particles prepares, specifically, make its moisture be less than by dry for sintering low-density ceramsite (20/40) 0.1% is standby；

(5) prepared by proppant, and detailed process is:

Sinter low-density ceramsite after being dried by 2kg in step (4) and put in puddle mixer, 160 DEG C, 120r/min speed conditions Under, it is sequentially added into compounded resin 80g in step (3), amine curing agent (triethylene tetramine) 16g, 3.6g silane coupler (KH- 550), plasticizer (dimethyl phthalate) 4g, continuously stirred 60s,

Add dispersant (calcium stearate) 4g, continuously stirred 30s,

Prepared hydrogel material in 20g step (2) is added when being uniformly dispersed,

When (80 DEG C) continue stirring 15min under cryogenic conditions, there is being clearly separated phenomenon, discharging to proppant, cool down, sieve, I.e. derive from suspended prop.

In the present embodiment, each material amounts is,

Aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel=2000g:80g: 16g:3.6g:4g:4g:20g；

That is,

Aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel=100:4:0.8: 0.18:0.2:0.2:1.

Comparative example 1

The preparation method of the proppant that this comparative example is provided is same as in Example 1, and only in set-up procedure (5), hydrogel material is adopted Carry out substituting as comparison with 20g PAMA.

Comparative example 2

The preparation method of the proppant that this comparative example is provided is same as in Example 1, only uses 80g bisphenol-A in set-up procedure (5) Epoxy resin substitutes compounded resin as comparison.

Comparative example 3

The preparation method of the proppant that this comparative example is provided is same as in Example 1, only uses 80g bisphenol-A in set-up procedure (5) Epoxy resin substitutes compounded resin, uses 20g PAMA to substitute hydrogel material simultaneously.

Comparative example 4

The preparation method of the proppant that this comparative example is provided is same as in Example 1, only uses 80g bisphenol-A in set-up procedure (5) Epoxy resin substitutes compounded resin, uses 16g non-ionic polyacrylamide (8,000,000 molecular weight) to substitute hydrogel material simultaneously.

Detecting the performance of the present embodiment with the proppant prepared by each comparative example, testing result is as shown in the table:

。

From above-mentioned Data Comparison it can be seen that proppant provided herein can under the conditions of the clear water that sand ratio is 20% With stable suspersion more than two hours, occur without obvious sedimentation phenomenon；And resistant to breakage ability is preferable, can be used for deep reservoir Pressing crack construction.

The flow conductivity of proppant provided to above-described embodiment and comparative example is tested, and concrete outcome is described below.

Embodiment 1 provided proppant flow conductivity test result is as follows:

。

Comparative example 1 provided proppant flow conductivity test result is as follows:

。

Comparative example 2 provided proppant flow conductivity test result is as follows:

。

Comparative example 3 provided proppant flow conductivity test result is as follows:

。

Comparative example 4 provided proppant flow conductivity test result is as follows:

。

From above-mentioned series of tables detection Data Comparison it can be seen that the flow conductivity of proppant provided herein relatively Good, and oil-water ratio can be improved, serve the effect of oil output to a certain extent.

It is emphasized that above-described embodiment is only presently preferred embodiments of the present invention, be only to made based on specific material Standby specific carry out the mensuration of properties of product from suspended prop product, but do not invented asked protection domain and should not manage Solve as to be only limitted to above-mentioned concrete material, the material of same type is suitably replaced, suitably selected material amounts I.e. can get the complete skill scheme of the present invention, succinctly need for text, the most excessively repeat to introduce.

In general, when using proppant provided herein, owing to need not use a large amount of organic material to improve Sand concentration example, and under formation water environment, also can have certain prop-carrying capacity, thus little to formation damage, belong to a kind of ring Border friendly product, adds that it can improve the technical advantage of oil and gas production, thus has preferable using value.

Claims (7)

1. one kind be applied to riverfrac treatment system from suspended prop, it is characterised in that should be from suspended prop through following step Suddenly it is prepared from:

(1) gelatinized starch is prepared, specifically, use sodium hydroxide to be modified and gelatinizing starch；

(2) preparing hydrogel material, detailed process is:

Under the conditions of nitrogen atmosphere, be sequentially added in reactor the gelatinized starch prepared by emulsifying agent, thiacyclohexane, step (1), AM, carbamide, 60 DEG C ~ 70 DEG C stirring reaction 20 ~ 40min；

After reaction terminates, ammonia regulation pH value is to pH=7 ~ 8；

Add initiator stirring reaction 2 ~ 3h；

Precipitate with ethanol, and use washing with acetone precipitate, after 40 DEG C ~ 60 DEG C vacuum drying, be hydrogel material crude product；

In preparation process, AM with the aqueous solution of mass fraction 33%, each material amounts is,

Emulsifying agent: thiacyclohexane: the gelatinized starch prepared by step (1): AM: carbamide: initiator=4g:150mL:10g:180mL: 0.5g:1.32g；

Described emulsifying agent is one or two kinds of arbitrary proportion mixture in span, tween；

Described initiator is one or two kinds of arbitrary proportion mixture in persulfate, bisulfites；

(3) compounded resin is prepared, particularly as follows: after thermoplastic resin and Colophonium are mixed, be warming up to 70 DEG C ~ 100 DEG C and melt, stirring Under the conditions of mixing 1 ~ 2h, be compounded resin；

In preparation process, in terms of mass fraction, thermoplastic resin: Colophonium=2 ~ 6:7；

Described thermoplastic resin is one or more arbitrary proportion mixture in phenolic resin, epoxy resin, phenol-formaldehyde resin modified；

(4) preparation of aggregate kernel, specifically, by aggregate inner core particles drying for standby；

(5) preparing proppant, detailed process is:

Dried aggregate kernel in step (4) is put in puddle mixer, 150 DEG C～230 DEG C, under stirring condition, be sequentially added into Compounded resin, amine curing agent, silane coupler, plasticizer in step (3), after stirring, add dispersant, be uniformly dispersed Hydrogel material prepared in rear addition step (2)；

After 70 DEG C ~ 80 DEG C are continued to stir, discharging, cool down, sieve, i.e. derive from suspended prop；

In preparation process, in terms of mass fraction, each material amounts is,

Aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel material=100:4 ~ 8: 0.5 ~ 1.0:0.05 ~ 0.2:0.2 ~ 0.3:0.1 ~ 0.4:0.2 ~ 1.5；

Described amine curing agent is one or more in triethylene tetramine, hexamethylenetetramine, diethylenetriamine, TEPA Arbitrary proportion mixture；

Described silane coupler is aminopropyl triethoxysilane, glycidyl ether oxygen propyl trimethoxy silicane or metering system One or more arbitrary proportion mixture in acryloxypropylethoxysilane trimethoxy silane；

Described plasticizer is adjacent benzene-type dicarboxylic acid esters, specifically such as dimethyl phthalate, dibutyl phthalate, adjacent benzene two One or more arbitrary proportion mixture in formic acid di-isooctyl；

Described dispersant is one or both arbitrary proportion mixture in calcium stearate, zinc stearate.

Be applied to the most as claimed in claim 1 riverfrac treatment system from suspended prop, it is characterised in that in step (5), with Mass fraction meter, each material amounts is,

Aggregate kernel: compounded resin: amine curing agent: silane coupler: plasticizer: dispersant: hydrogel material=100:4: 0.8:0.18:0.2:0.2:1.

Be applied to the most as claimed in claim 1 riverfrac treatment system from suspended prop, it is characterised in that in step (3), with Mass fraction meter, thermoplastic resin: Colophonium=3:7.

Be applied to the most as claimed in claim 1 riverfrac treatment system from suspended prop, it is characterised in that in step (1), with Mass fraction meter, sodium hydroxide: starch=1:30.

Be applied to the most as claimed in claim 1 riverfrac treatment system from suspended prop, it is characterised in that in step (4), institute Stating aggregate kernel is 20 ~ 40 mesh sintering low-density ceramsites.

Be applied to the most as claimed in claim 1 riverfrac treatment system from suspended prop, it is characterised in that in step (2), right Hydrogel material crude product glacial acetic acid-ethylene glycol mixture carries out soxhlet type, removes homopolymer, be dried, pulverize after obtain water Gel rubber material finished product；Described glacial acetic acid-ethylene glycol mixture is the mixed liquor of volume ratio 60:40.

7. described in any one of claim 1 ~ 6, it is applied to the preparation method from suspended prop of riverfrac treatment system, its feature It is, comprises the steps:

(1) gelatinized starch is prepared, specifically, use sodium hydroxide to be modified and gelatinizing starch；

(2) preparing hydrogel material, detailed process is:

Under the conditions of nitrogen atmosphere, be sequentially added in reactor the gelatinized starch prepared by emulsifying agent, thiacyclohexane, step (1), AM, carbamide, 60 DEG C ~ 70 DEG C stirring reaction 20 ~ 40min；

After reaction terminates, ammonia regulation pH value is to pH=7 ~ 8；

Add initiator stirring reaction 2 ~ 3h；

Precipitate with ethanol, and use washing with acetone precipitate, after 40 DEG C ~ 60 DEG C vacuum drying, be hydrogel material crude product；

(3) compounded resin is prepared, particularly as follows: after thermoplastic resin and Colophonium are mixed, be warming up to 70 DEG C ~ 100 DEG C and melt, stirring Under the conditions of mixing 1 ~ 2h, be compounded resin；

(4) preparation of aggregate kernel, specifically, by aggregate inner core particles drying for standby；

(5) preparing proppant, detailed process is:

Dried aggregate kernel in step (4) is put in puddle mixer, 150 DEG C～230 DEG C, under stirring condition, be sequentially added into Compounded resin, amine curing agent, silane coupler, plasticizer in step (3), after stirring, add dispersant, be uniformly dispersed Hydrogel material prepared in rear addition step (2)；

After 70 DEG C ~ 80 DEG C are continued to stir, discharging, cool down, sieve, i.e. derive from suspended prop.