CN109021959A - A kind of suspended prop - Google Patents
A kind of suspended prop Download PDFInfo
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- CN109021959A CN109021959A CN201811159580.3A CN201811159580A CN109021959A CN 109021959 A CN109021959 A CN 109021959A CN 201811159580 A CN201811159580 A CN 201811159580A CN 109021959 A CN109021959 A CN 109021959A
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- resin
- coat
- proppant
- polyalcohols
- suspended prop
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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
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
Abstract
The present patent application belongs to petroleum, the fluid minerals production technique such as natural gas and shale gas field, specifically disclose a kind of suspended prop, including aggregate and coat, the coat includes resin, catalyst, curing agent and additive, it is characterized in that, the aggregate is quartz sand, the additive is aminated compounds, the coat includes interior coat and outer coat, the outer coat is by polyalcohols resin, isocyanates and catalyst are made, the aminated compounds addition is in outer coat, the isocyanates is the 40-70% of polyalcohols resin, the hydroxyl equivalent of the polyalcohols resin is 60-300.Present invention is mainly used for exploitation petroleum, shale gas, solve the problems, such as that proppant causes cost to increase and cause environmental pollution using needing to add gelling agent in clear water.
Description
Technical field
The invention belongs to the fluid minerals production technique such as petroleum, natural gas and shale gas fields, specifically disclose a kind of outstanding
Floating proppant.
Background technique
Modern age, the conventional production technique innovation and development with unconventional oil and gas formd the hydraulic fracturing normal technology of system
Specification, basic technical features are exactly to use fracturing system, will contain various functional materials by high pressure pump truck and help
The water base mixing liquid of agent is sent into underground and produces that all size is different, crack widely distributed, that go deep into reservoir, and keeps obtaining
Reservoir fracture be in the interconnected a kind of volume increase for reaching reservoir reconstruction of non-occluded state bring reservoir and production tubing
Technical system.It is exactly to keep non-closed in the reservoir fracture of acquisition as a kind of technical method vital in the technical system
It needs to insert to have in crack when state and centainly Z can be continuously maintained the proppant that voidage will not be crushed by reservoir closed high
Material, this material are referred to as " proppant ".Due to the technology utilize be economy preferably and have incompressible characteristic
How the water that nature is easily obtained is more convenient to be easy in such liquid, is more efficient, economically will " branch as carrier
It is all that oil fracturing engineers are dedicated to the major class technical problem solved all the time that support agent ", which is sent into reservoir,.
The usual material of proppant for meeting pressing crack construction requirement is that inorganic high-strength degree material is prepared, because its apparent density is equal
It is far longer than clear water density 1g/cm3, so various glue must be added by carrying the carrying liquid of high-visual density proppant when pressing crack construction
The proppant that clear water presentation " frozen glue " state will be added will in carrying liquid in solidifying agent wraps carrying by gel and is sent into reservoir fracture,
Then the carrying liquid addition gel breaker of " frozen glue " shape is broken glue again makes " proppant being suspended " to be deposited to crack by self weight
In play the role of support crack.For this purpose, engineers can will also be propped up in searching without using " gelling agent " clear water for a long time
The technological approaches that agent is sent into reservoir is supportted, the technology of the opposite apparent density difference of inorganic material proppant and load fluid is such as reduced, makes
The absolute apparent density that proppant is reduced with organic synthesis material is combined using low-density inorganic material with organic overlay film compound
Material reduces the technology of density, and using mutual between surfactant and coated material change proppant and carrying liquid
Active force, technology of wellability etc..Although achieving certain effect, it is difficult to realize that pure clear water is taken as pressing crack construction always
The technical effect of sand liquid.
Proppant is mainly to be formed by aggregate with the resin film for being coated on aggregate surface at present, and resin film common at present has
Phenolic resin film, epoxy resin film and urethane resin film etc., but at present in the main mesh of mode of proppant surface overlay film
Be improve aggregate intensity, so what is usually solved is how to improve resin film strength, to promote the water conservancy diversion of proppant
Ability, but proppant in the prior art does not have suspendability in clear water, is not able to satisfy construction requirement, when construction, still need
The carrying liquid with vicidity is prepared again, carries the chemical gum material contained in liquid, and there is injury and meeting to subsurface reservoir
It pollutes the environment, while increasing use cost.
Summary of the invention
The purpose of the present invention is to provide a kind of suspended prop, to solve proppant in clear water using needing to add glue
The problem of solidifying agent causes cost to increase and causes environmental pollution.
In order to achieve the above object, base case of the invention are as follows: a kind of suspended prop, including aggregate and coat,
The coat includes resin, catalyst, curing agent and additive, and the aggregate is quartz sand, and the additive is amine
Object is closed, the coat includes interior coat and outer coat, and the outer coat is by polyalcohols resin, isocyanates and urges
Agent is made, and in outer coat, the isocyanates is the 40-70% of polyalcohols resin for the aminated compounds addition,
The hydroxyl equivalent of the polyalcohols resin is 60-300.
The working principle of this base case is: after the proppant in the present invention is mixed with water, proppant can suspend or
Person half suspends in water；In pressing crack construction, mixture is pumped in the crack of lithosphere, proppant can be entered with water to be split
It plays a supporting role in seam.
The beneficial effect of this base case is:
(1) proppant of the present invention to be with quartz sand be aggregate, tests finding through inventor, the isocyanide in outer coat
Acid esters is the 40-70% of polyalcohols resin, and when the hydroxyl equivalent of polyalcohols resin is 60-300, proppant can uniformly hang
It floats in clear water, the time to suspend in clear water is at least 4h, can reach construction requirement；Proppant in the present invention is in coat
Nanoscale protrusion is contained on surface, and bump sizes are between 100~500nm, and for protrusion in coating layer surface random distribution, protrusion is white
Curved body, the surface of every 100 square micron have 40 or so protrusions, these protrusions extend in the surface of proppant particles,
Protrusion will increase the buoyancy of proppant, while when proppant and water contact, a kind of group energy reserved in surface coating resin
It is reacted rapidly with water and releases bulk gas small molecule, these gas molecules or be enclosed in resin film and expand against resin film
Body stage, which thickens, increases the equivalent diameter of proppant particles body, or is attached to the extension of proppant surface stage or is gathered in
The gas blanket of one layer of package proppant particles body is formed on the interface that proppant resin film is contacted with water body, this gas blanket is propping up
Formation stages are connected between support agent granule and the result closed causes simple grain proppant to form more loose cotton in water body
Wadding gathers shape, is greatly lowered the relative density of proppant in water, in this way so as to make proppant suspend in water.
When proppant moves in water, the protrusion of the curved surface on proppant resin film can reduce the proppant rate of settling in water；Part
The proppant of water bottom accumulation is settled down to because the more protrusion of its surface resin film reduces the tight of proppant particles stack layer
Solidity, intergranular water body amount is more compared with conventional particle stack, and then when water body can be more the fluidity with very little
Add and easily push the separation of its congeries and movement, realizes that proppant preferably suspends in water；
(2) proppant is mixed into water, proppant can be made to suspend or partly suspend in water, proppant enters in rock
Gap after proppant can be made to dispersing, to ensure that proppant has preferable support effect with water flowing；
(3) after proppant is mixed with water, other gum materials are not added, and protective effect is played to environment；Use water
As suspending agent, use cost is low；
(4) the Applicable temperature range of proppant of the invention in pressing crack construction is 5-145 DEG C, proppant Applicable temperature model
It encloses extensively, the stability in this temperature range is good；
(5) scheme change traditional pressing crack construction need to be added guar gum etc. thickening substance, realize clear water take sand.Thus
Pressure break cost is greatly saved, construction technology is simplified, reduces the pollution to environment, saves water resource；Use quartz sand as bone
The proppant of material, proppant sphericity is good, intensity is high, water conservancy diversion is good.
Compared with prior art, this proppant can use in the water of PH > 3, and alkalinity is stronger, and suspension is better, in height
The suspension of proppant is more preferable in the water of salinity, is more advantageous to pressing crack construction, is influenced by water quality smaller, and stability is good, fits
It is wide with range.
Further, epoxy group, phenolic hydroxyl group, carbonyl, amide are at least contained in the resinous molecular structure in the interior coat
The organic macromolecule material of base, amino, two or more groups in isocyanate group, the average molecular weight of the resin are greater than
100.Using the resin of mentioned kind, precuring the film shape of netted high intensity can be become in the resin film that interior coat is formed
State, so that product is contacted with fracturing fluid when being applied to oil field fracturing construction with chemical inertness height, can't discharge it
His harmful substance.
Further, the quartz sand is 100 parts, and the total amount of the resin of the outer coat of the resin of interior coat is 0.5-8 parts,
The curing agent that interior coat uses is the 20-40% of resin quality in interior coat, and the quality of the catalyst is polyalcohols
The 1/1000-1/100 of resin, the quality of the aminated compounds are the 1-20% of polyalcohols resin quality；When interior coat
It is interior containing polyalcohols resin and when other resins, the mass ratio of polyalcohols resin and other resins is 1:1-5.Work as proppant
In the quartz sand containing aforementioned proportion, resin, curing agent, catalyst and when aminated compounds, proppant after being immersed in the water,
It will form more protrusions on outer coat, protrusion increases the buoyancy of proppant, so that proppant can uniformly suspend
In water.
Further, the resin is organic thermoplastic polymer resin, viscosity of the polyalcohols resin at 20 DEG C
Range is 10~60cp.The intensity of such thermoplastic resin is high, and Technological adaptability is strong, acid-fast alkali-proof.
Further, sphericity >=0.7 of the quartz sand, circularity >=0.7, percentage of damage≤8%, acid solubility≤5%.Partial size
Between 0.1~1.0mm.When the sphericity of quartz sand in proppant >=0.7, proppant has preferably from suspension effect.
Further, the aminated compounds is diethylenetriamine, triethylamine, ethamine, triethylene tetramine, one in ethylenediamine
Kind or two or more compositions.The molecule of above-mentioned amine is small, and reactivity is big.
Further, the curing agent includes organic amine, organic acid anhydride, stearic acid, dihydroxy stearic acid, oleic acid, sub- oil
The mixture of one of acid, ricinoleic acid or any component, the degree of functionality of the curing agent are 2-5.When between degree of functionality 2-5,
Curing agent reactivity is good, can accelerate the comprehensive performance performance and chemical synthesis inertia of the resin membrane body of support surface coat.
Further, the catalyst is one or more of alkyls tin compound and/or alkyls lead compound
Mixture.It can make to improve the suspending efficiency of proppant in water using the catalyst of alkyls tin and/or alkyl ekalead.
Further, alkyls tin compound includes dibutyl tin dilaurate, tributyl tin, the alkyls lead compound
Including lead tetraethide, isooctyl acid lead.It can accelerate the solidification rate of coat using above-mentioned catalyst and intensity shows.
Detailed description of the invention
Fig. 1 is a kind of electron-microscope scanning figure of suspended prop embodiment 1 of the present invention；
Fig. 2 is the display figure in embodiment 1 under the microscope of proppant.
Specific embodiment
It is further described below by specific embodiment:
Raw material selected by the present invention is as follows:
Aggregate is quartz sand.The apparent density of quartz sand is 2.55g/cm3, granularity is 20~140 mesh, sphericity >=0.7, circularity
>=0.7, percentage of damage≤8%, acid solubility≤5%.
Polyalcohols resin is organic thermoplastic polymer resin, and polyalcohols resin viscosity range is 10-60cp (20
DEG C), epoxy group, phenolic hydroxyl group, carbonyl, amide groups, amino, isocyanate group are at least contained in the resinous molecular structure of interior coat
In two or more groups organic macromolecule material, the average molecular weight of resin is greater than 100；Isocyanates is polyalcohols tree
The 40-70% of rouge, the hydroxyl equivalent of the polyalcohols resin are 60-300.Isocyanates include as toluene di-isocyanate(TDI),
One of methylenediphenyl diisocyanates, isophorone diisocyanate, methyl diphenylene diisocyanate are several
Kind.
Curing agent include organic amine, organic acid anhydride, stearic acid, dihydroxy stearic acid, oleic acid, linoleic acid, in ricinoleic acid
One kind or any component mixture, the degree of functionality of curing agent is between 2-5.
Additive is aminated compounds, and aminated compounds is diethylenetriamine, triethylamine, ethamine, triethylene tetramine, second two
The composition of one or more of amine.
Catalyst is the organo-metallic compound of alkyls tin and alkyl ekalead, including dibutyl tin dilaurate, three fourths
One of Ji Xi, lead tetraethide, isooctyl acid lead or several mixtures.
Proppant of the invention has coat, and coat includes interior coat and outer coat, contains in outer coat
Polyalcohols resin and isocyanates, polyalcohols resin and isocyanates, which react, generates polyurethane ester resin, in outer coat
Polyurethane resin and additive contacted with water after can form more nanoscales protrusion, as shown in connection with fig. 1, in embodiment 1
Proppant finds that bump sizes are presented between 100~500nm, protrusion in coating layer surface random distribution, protrusion through electron-microscope scanning
White curved body, the surface of every 100 square micron have 40 or so protrusions；Fig. 2 is the microscope of proppant in embodiment 1
Under display figure.
Particular technique or condition person are not specified in various embodiments of the present invention, it is described conventional according to the literature in the art
Technology or conditions carry out.Reagents or instruments used without specified manufacturer is that can buy the routine obtained by market
Reagent manufacture.
In the present invention from suspended prop, quartz sand is 100 parts, the total resin of resin in interior coat and outer coat
Amount is 0.5-8 parts, and the curing agent in interior coat is the 20-40% of resin, and the quality of catalyst is the 1/ of polyalcohols resin
, the quality of aminated compounds is the 1-20% of polyalcohols resin quality；When containing polyalcohol in interior coat
When resinoid and other resins, the mass ratio of polyalcohols resin and other resins is 1:1-5.
Embodiment 1
Taking granularity is 100 parts of quartz sand of 20/40, is heated to 180 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 0.5 part of epoxy resin and 0.05 part and 0.1 curing agent T31 stirring is added in face, and 5 parts are added after temperature reaches 160-170 DEG C
Glycol polymers and the stirring of 0.05 part of dibutyl tin dilaurate, are added 0.005 part two after temperature reaches 140-150 DEG C
3.5 parts of toluene di-isocyanate(TDI) is added after temperature reaches 100-120 DEG C and stirs for the stirring of the mixture of ethylene triamine and ethylenediamine
It mixes, takes the dish out of the pot after temperature reaches 80 DEG C.
Embodiment 2
Taking granularity is 100 parts of quartz sand of 30/50, is heated to 230 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 5 parts of phenolic resin and 1.5 parts of hexamethylenetetramine stirrings are added in face, and 3 parts of second two is added after temperature reaches 190-200 DEG C
Alkoxide polymer and the stirring of 0.003 part of dibutyl tin dilaurate, be added after temperature reaches 160-170 DEG C 0.45 part of triethylamine and
The mixture of triethylene tetramine stirs, and 2.1 parts of methylenediphenyl diisocyanates are added after temperature reaches 140-150 DEG C
Stirring, takes the dish out of the pot after temperature reaches 90 DEG C.
Embodiment 3
Taking granularity is 100 parts of quartz sand of 40/70, is heated to 190 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 6 parts of epoxy ester resins and 2.5 parts of stirrings of curing agent 31 are added in face, and it is poly- that 2 parts of ethylene glycol are added after temperature reaches 160-170 DEG C
Object and 0.02 part of dibutyl tin dilaurate stirring are closed, 0.2 part of ethamine stirring is added after temperature reaches 140-150 DEG C, to temperature
1.4 parts of isophorone diisocyanate stirring is added in degree after reaching 110-120 DEG C, take the dish out of the pot after temperature reaches 80 DEG C.
Embodiment 4
Taking granularity is 100 parts of quartz sand of 70/140, is heated to 130 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
The inside and the mixture that 6 parts of ethylene glycol polymers and epoxy resin are added, wherein epoxy resin is 3 parts, reaches 80- to temperature
The mixture that both 0.03 part dibutyl tin dilaurate, lead tetraethides are added after 130 DEG C is stirred and is heated, and is reached to temperature
3 parts of methylenediphenyl diisocyanates and 1.2 parts of curing agent T31 stirring are added after 200-210 DEG C；Reach 160- to temperature
The mixing of both 2 parts of ethylene glycol polymers and 0.02 part of dibutyl tin dilaurate, lead tetraethide is added after 170 DEG C,
0.4 part of ethylenediamine stirring is added after temperature reaches 140-160 DEG C, 1.4 parts of hexichol is added after temperature reaches 110-120 DEG C
Dicyclohexylmethane diisocyanate stirring, takes the dish out of the pot after temperature reaches 80 DEG C.
Comparative example 1
Taking granularity is 100 parts of quartz sand of 20/40, is heated to 180 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 0.5 part of epoxy resin and 0.05 part and 0.1 curing agent T31 stirring is added in face, and 5 parts are added after temperature reaches 160-170 DEG C
Epoxy resin and the stirring of 0.05 part of dibutyl tin dilaurate, are added 0.005 part of divinyl after temperature reaches 140-150 DEG C
3.5 parts of toluene di-isocyanate(TDI) stirring is added in the stirring of the mixture of triamine and ethylenediamine after temperature reaches 100-120 DEG C,
It takes the dish out of the pot after temperature reaches 80 DEG C.
Comparative example 2
Taking granularity is 100 parts of quartz sand of 30/50, is heated to 230 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 5 parts of phenolic resin and 1.5 parts of hexamethylenetetramine stirrings are added in face, and 3 parts of phenolic aldehyde is added after temperature reaches 190-200 DEG C
Resin and 0.003 part of dibutyl tin dilaurate stirring, are added 0.45 part of triethylamine and three second after temperature reaches 160-170 DEG C
The mixture of alkene tetramine stirs, and 2.1 parts of methylenediphenyl diisocyanates are added after temperature reaches 140-150 DEG C and stir
It mixes, reaches 90 DEG C to temperature and take the dish out of the pot.
Comparative example 3
Taking granularity is 100 parts of quartz sand of 40/70, is heated to 190 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 6 parts of epoxy ester resins and 2.5 parts of stirrings of curing agent 31 are added in face, and it is poly- that 2 parts of ethylene glycol are added after temperature reaches 160-170 DEG C
Object and 0.02 part of dibutyl tin dilaurate stirring are closed, it is different that 1.4 parts of isophorone two is added after temperature reaches 140-150 DEG C
Cyanate stirring, takes the dish out of the pot after temperature reaches 80 DEG C.
Comparative example 4
Taking granularity is 100 parts of quartz sand of 20/40, is heated to 180 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 0.5 part of epoxy resin and 0.05 part and 0.1 curing agent T31 stirring is added in face, and 5 parts are added after temperature reaches 160-170 DEG C
Glycol polymers and the stirring of 0.05 part of dibutyl tin dilaurate, are added 0.005 part two after temperature reaches 140-150 DEG C
1.75 parts of toluene di-isocyanate(TDI) is added in the stirring of the mixture of ethylene triamine and ethylenediamine after temperature reaches 100-120 DEG C
Stirring, takes the dish out of the pot after temperature reaches 80 DEG C.
Comparative example 5
Taking granularity is 100 parts of quartz sand of 20/40, is heated to 180 DEG C, the quartz sand of heating is poured into bowl-type mulling pot
Simultaneously 0.5 part of epoxy resin and 0.05 part and 0.1 curing agent T31 stirring is added in face, and 5 parts are added after temperature reaches 160-170 DEG C
Glycol polymers and the stirring of 0.05 part of dibutyl tin dilaurate, are added 0.005 part two after temperature reaches 140-150 DEG C
3.75 parts of toluene di-isocyanate(TDI) is added in the stirring of the mixture of ethylene triamine and ethylenediamine after temperature reaches 100-120 DEG C
Stirring, takes the dish out of the pot after temperature reaches 80 DEG C.
To as shown in table 1 from suspended prop test data in embodiment 1-4 and comparative example 1-5.
Table 1
" certainly outstanding composite index " is the overall target for evaluating proppant suspendability in clear water in upper table, by mattress height
Ratio codetermines with suspending, and engineering significance is practical bulk density of the proppant in clear water, and value is smaller to be equivalent in water
In relative density with regard to smaller, then the suspension of proppant is better, suspension time is longer.
Obtained by the analysis of table 1: the proppant in embodiment 1-4 is all satisfied construction requirement, this is because in outer coat
Containing polyalcohols resin and isocyanates, polyalcohols resin and isocyanates reaction generate polyurethane resin, polyurethane tree
Adipose membrane can react rapidly a large amount of gas molecules of generation after meeting water, these gas molecules are attached to the table of proppant particles
Face forms the bubble of micro/nano level in proppant surface, while the bubble generated can cause the coat on surface to expand, and a large amount of
Proppant clustering together when, formed cotton it is cotton-shaped, be greatly lowered the relative density of proppant in water in this way, thus
Proppant can be made to suspend in water, realization uses clear water as liquid is carried and (carries liquid certainly and be also not only limited to clear water, can also be
Added with the carrying liquid of thickener), while making the proppant in this programme meet the basic pressure break of industry to require, in fracturing process
In do not need the addition thickeners such as guar gum, greatly reduce cost, simplified fracturing unit and technique, reduce the dirt to environment
Dye, and huge discharge operation may be implemented using clear water as liquid is carried, improve working efficiency.
Embodiment 1 is compared with comparative example 1 it is found that using the obvious from outstanding composite index of proppant obtained in embodiment 1
Less than proppant obtained in comparative example 1 from outstanding composite index, and embodiment l and the difference of comparative example 1 are: comparative example 1
In resin in interior coat and outer coat be epoxy resin, the proppant that comparative example 1 is prepared from suspendability
It is substantially reduced.
Embodiment 2 is compared with comparative example 2 it is found that using the obvious from outstanding composite index of proppant obtained in embodiment 2
Less than proppant obtained in comparative example 2 from outstanding composite index, and embodiment 2 and the difference of comparative example 2 are: comparative example 2
In resin in interior coat and outer coat be phenolic resin, the proppant that comparative example 2 is prepared from suspendability
It is substantially reduced.
Embodiment 3 is compared with comparative example 3 it is found that using the obvious from outstanding composite index of proppant obtained in embodiment 3
Less than proppant obtained in comparative example 3 from outstanding composite index, and embodiment 3 and the difference of comparative example 3 are: comparative example 3
Aminated compounds is free of in China and foreign countries' coat, the proppant being prepared is substantially reduced from suspendability.When in proppant not
When containing amines additives, proppant it is larger from suspension index, the proppant in comparative example 3 be not able to satisfy from suspend require.
Embodiment l is compared with comparative example 4 as can be seen that hanging composite index certainly using proppant obtained in embodiment 1
It is significantly less than the certainly outstanding composite index of proppant obtained in comparative example 4, and embodiment l and the difference of comparative example 4 are: comparison
It is 35% that the amount of isocyanates, which accounts for the amount of polyalcohols resin, in example 4, it is seen that when the amount of isocyanates accounts for polyalcohols resin
When amount is less than 40%, the proppant that is prepared is substantially reduced from suspendability.
Embodiment l is compared with comparative example 5 as can be seen that hanging composite index certainly using proppant obtained in embodiment 1
It is significantly less than the certainly outstanding composite index of proppant obtained in comparative example 5, and embodiment l and the difference of comparative example 5 are: comparison
It is 75% that the amount of isocyanates, which accounts for the amount of polyalcohols resin, in example 5, it is seen that when the amount of isocyanates accounts for polyalcohols resin
When amount is greater than 70%, the proppant that is prepared is substantially reduced from suspendability.
The suspension of proppant proppant in the water of mine high salinity in the present invention is more preferable, by water quality influenced compared with
It is small, it is more advantageous to pressing crack construction, stability is good.
The proppant of different quartz sand sizes is cooked into suspension time, suspend ratio, mattress high measure.
Suspension time refers to the maximum duration that can freely suspend in water.
Suspend than be evaluate proppant in water upper layer suspension amount be total proppant percentage, our uses in test
Quartz sand: the case where water quality ratio is 1:4 is evaluated.Experimental method is to be measured in the wide-mouth bottle of 300ml with graduated cylinder
200ml water pours into wide-mouth bottle, and precise 50g proppant pours into the wide-mouth bottle for having filled water, closes the lid, and firmly shakes up and down
It is dynamic 30 times, static firmly to shake 30 times up and down after the same method after ten minutes, with filter paper the outstanding of upper layer is filtered out after static
Floating quartz sand, the weight that the quartz sand filtered out is weighed after drying is m, suspension amount X=m/50*100%.
Since laboratory can only do static suspension test, so the mattress height of lower layer is also evaluate suspendability one
Item important indicator.Mattress height definition: lower layer height of the 20g proppant in the 100ml graduated cylinder equipped with 100ml clear water.Detection
Method: with the amount of plastic wound packages 100ml water of 100ml, precise 20g proppant is poured into the graduated cylinder for having filled water, tight with the right hand
Cover graduated cylinder mouth, left hand is picked up graduated cylinder and is gently reversed 10 times up and down, it is static after ten minutes, reverse 10 up and down after the same method
It is secondary, there is vernier caliper to measure the bed height of lower layer's quartz sand after static.
Proppant purchase for the proppant in comparative example 6-9 bought by embodiment 1 and in the market, in comparative example 4-7
Buy the proppant from 20/40,30/50,40/70,70/140 specification of Luoyang Zhong Tai Industrial Co., Ltd..To different quartz sand sizes
Proppant do suspension time, suspend ratio, the results are shown in Table 2 for mattress high measure.
Table 2
The quartz sand of different size and mattress height all < 28mm of conventional proppants.It can by the experimental data of table 2
Know, proppant mattress height all > 30mm in the present invention, so proppant is suspended with a kind of half in fact in static state
State be deposited in liquid bottom, once liquid flows, the present invention in proppant can suspend.
The parameter index of different quartz sand sizes is as shown in table 3 in above-described embodiment.
Table 3
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.
Claims (9)
1. a kind of suspended prop, including aggregate and coat, the coat includes resin, catalyst, curing agent and addition
Agent, which is characterized in that the aggregate is quartz sand, and the additive is aminated compounds, and the coat includes interior coat
With outer coat, the outer coat is made of polyalcohols resin, isocyanates and catalyst, the aminated compounds addition
In outer coat, the isocyanates is the 40-70% of polyalcohols resin, and the hydroxyl equivalent of the polyalcohols resin is
60-300。
2. a kind of suspended prop according to claim 1, which is characterized in that the molecular resin knot in the interior coat
It is at least organic big containing the two or more groups in epoxy group, phenolic hydroxyl group, carbonyl, amide groups, amino, isocyanate group in structure
The average molecular weight of molecular substance, the resin is greater than 100.
3. a kind of suspended prop according to claim 2, which is characterized in that the quartz sand is 100 parts, interior coat
The total amount of resin of the outer coat of resin be 0.5-8 part, the curing agent that interior coat uses is resin quality in interior coat
20-40%, the quality of the catalyst is the 1/1000-1/100 of polyalcohols resin, and the quality of the aminated compounds is
The 1-20% of polyalcohols resin quality；When containing polyalcohols resin and other resins in interior coat, polyalcohols tree
The mass ratio of rouge and other resins is 1:1-5.
4. a kind of suspended prop according to claim 3, which is characterized in that the polyalcohols resin is at 20 DEG C
Range of viscosities is 10~60cp.
5. a kind of suspended prop according to claim 1, which is characterized in that sphericity >=0.7 of the quartz sand, circularity
>=0.7, percentage of damage≤8%, acid solubility≤5%.
6. a kind of suspended prop according to claim 1, which is characterized in that the aminated compounds is divinyl three
The composition of one or more of amine, triethylamine, ethamine, triethylene tetramine, ethylenediamine.
7. a kind of suspended prop according to claim 1, which is characterized in that the curing agent includes organic amine, has
The mixture of one of machine anhydride, stearic acid, dihydroxy stearic acid, oleic acid, linoleic acid, ricinoleic acid or any component, it is described
The degree of functionality of curing agent is 2-5.
8. a kind of suspended prop according to claim 1, which is characterized in that the catalyst is alkyls tin compound
And/or the mixture of one or more of alkyls lead compound.
9. a kind of suspended prop according to claim 8, which is characterized in that alkyls tin compound includes tin dilaurate
Dibutyl tin, tributyl tin, the alkyls lead compound include lead tetraethide, isooctyl acid lead.
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| CN112708413A (en) * | 2020-12-25 | 2021-04-27 | 成都理工大学 | Air bag shell inflatable suspension proppant and preparation method thereof |
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