CN105670600A - Water acid-sensitivity deformation magnetic tracer function self-suspension propping agent and preparation method thereof - Google Patents
Water acid-sensitivity deformation magnetic tracer function self-suspension propping agent and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of oil-gas field fracturing production-increase propping agent preparation, and relates to a water acid-sensitivity deformation magnetic tracer function self-suspension propping agent and a preparation method thereof. The propping agent comprises an aggregate and a surface hydration layer, wherein the aggregate is one of magnetic rare earth composite resin, quartz sand or ceramsite and like material; the surface hydration layer is composed of three layers, the innermost layer is a cationic macromolecule inner polymer layer or a modifier layer, the middle layer is an anionic macromolecule outer polymer layer, and the outer layer is anti-caking agent. The propping agent has the acid-sensitivity deformation self-suspension function of producing buoyant force while encountering water and breaking gel to precipitate while encountering the acid, and a tracer function of monitoring flow guiding position of the propping agent through electromagnetic imaging; in the process of exerting the fracturing engineering on shale, compact oil-gas or coal bed base and like argillaceous plasticity micronano hole reservoir, the fracturing liquid with the propping agent has excellent flow guiding characters of suspension sand-adding of non-floating to the roof and not sinking to the bottom; the permeation is improved, the hurt is avoided, the propping agent is efficient and capable of increasing production, the construction cost is lowered, and the application prospect is wide.
Description
Technical field:
The invention belongs to oil-gas field fracturing volume increase proppant preparing technical field, relate to a kind of acid-sensitive deformation Magnetic Tracer function of water from suspended prop and preparation method thereof, this proppant is met water sensitive and is caused that volumetric expansion deformation produces from suspending power; Meet the broken glue precipitation of acid and eliminate proppant from suspendability, be conducive to the of the fracturing fluid row of returning to reduce reservoir damage; And owing to proppant contains electromagnetism rare earth material, it is possible to adopt electromagnetic monitoring imaging technique directly to describe the position in crack residing for proppant, make proppant have Magnetic Tracer function; Proppant returns on the tracking function of arranging construction method and magnetography monitoring proppant water conservancy diversion present position characteristic at composite-material formula, overlay film preparation technology, broken glue. Therefore, under riverfrac treatment liquid system, this proppant has from suspending power, it is possible to increase the flow conductivity of the produced artificial chicken-wire cracking of fracturing engineering; Utilize man-made fracture " secondary closure " mechanism, it is possible to achieve embed and add sand and prevent the problem of shaking out; Utilize to embed simultaneously and add sand and realize " turnaround fracture " of secondary fracturing or repeatedly refracturing and add sand effect of increasing production, reduce the fracturing fluid injury to reservoir, improve proppant transfer ability, strengthen fracturing yield increasing efficiency.
Background technology:
Hyposmosis, fine and close oil gas and shale oil gas resource reserve are global and domestic all account at a relatively high ratio, fracturing has become as conventional individual well increasing yield and injection technology, the Oil/gas Well operation initial stage of such oil-gas reservoir general must take fracturing well stimulation, realizes expanding flow conductivity by importing proppant, improve fracturing yield increasing effect, obtains high-quality well yield. Conventional pressure break is to utilize ground high-pressure pump group, with high discharge capacity, fracturing fluid is pumped in well, suppress high pressure in shaft bottom, produced crack, then the load fluid with proppant to be pumped into crack near shaft bottom, fracture extension filling proppant, after termination of pumping, fracturing fluid recovery (backflow) ground, proppant is trapped in crack supporting crack, crack seam is long for excellent, is beneficial to the gas channel forming high flow conductivity. It is divided into prepad fluid, load fluid and displacement fluid according to construction stage difference. Prepad fluid has cooling effect, and for the 30-40% of total liquid measure, load fluid carries the proppant into crack, and in total liquid, ratio is great, and appointment precalculated position delivered to by load fluid by displacement fluid, is all replaced in crack by load fluid in pit shaft.
Crude oil price continues to fall in recent years, and cost of winning tightens, and in conventional fracturing fluid, sand difference taken by formation water surface water, and filter loss is big, natural guar gum, guar gum derivative need to add the plurality of reagents such as buffer agent, antibacterial, antisludging agent, non-emulsifier, dispersion aids, wetting agent cross-linking agent, clay stabilizer, simultaneously need to carry out water-sensitive, acid-sensitive, alkali is quick, salt is quick, the fast multiple compatibility test such as quick, pressure-sensitive, it is many that slippery water consumes water resource, and prop-carrying capacity can not meet and adds sand demand on a large scale, and it is uneven to add sand, organic/inorganic frozen glue, cross linked polymer, VES, crosslinked foams etc. can produce the injuries such as stratum absorption, residue, reduce permeability, reduce flow conductivity, and conventional proppants crack growth extends restriction, conventional pressure break is generally initially charged little particle diameter sand, the big particle diameter of rear addition, slowly carries high sand ratio, and fracturing sand can quickly settle in slippery water, can cause " pregnant " phenomenon, the conventional effective supporting crack of pressure break only has 60%-70%, and proppant can not effectively migrate to the deep of fracturing fracture, conventional pressure break improves outstanding grittiness by improving fracturing fluid viscosity, improving pump rate, can increase machine utilization and chemical cost, use little particle diameter proppant to improve outstanding grittiness and carry out pressure break, proppant embedment stratum can be caused, reduce reservoir flow conductivity, it is low to there is intensity in low-density propping agent, and high density proppants sedimentation is fast, and the shortcoming that precoated sand price is high exists the contradiction between density, intensity, price. existing proppant can suck pulmonary and cause anthraco-silicosis, the diseases such as pulmonary carcinoma, reduce Drinking Water for Residents quality, harm driller and nearby residents healthy, high temperature resistant, resistance to high salt, the acid-sensitive Magnetic Tracer function of shear-stable high-strength functional water has resin to be coated reduction dust from suspended prop, fragment, cladding water solublity swollen resin simultaneously, there is resistance reducing effect, fracture half-length is longer, farther place can be migrated to, and substantially migrate within the scope of purpose oil district, do not need thickening agent, reinforcing agent, realize riverfrac treatment, reduce chemicals usage, pressure break integrated cost can be reduced, fracturing technology simplifies, efficiency improves, improve oil and gas production, existing function water acid-sensitive deformation Magnetic Tracer function can not be strong from the outstanding grittiness of suspended prop, comprcssive strength, resistance to acids and bases is not enough, there is presently no effectively high temperature resistant, resistance to high salt, the acid-sensitive deformation Magnetic Tracer function of shear-stable high intensity water is from suspended prop preparation and pressing crack construction method.
Summary of the invention:
It is an object of the invention to the shortcoming overcoming prior art to exist, seeking design provides a kind of acid-sensitive deformation Magnetic Tracer function of water from suspended prop and preparation method thereof.
To achieve these goals, the acid-sensitive deformation Magnetic Tracer function of water of the present invention includes aggregate and surface from suspended prop can hydrated sheath, wherein aggregate includes white sand, palm fibre sand, high-density high-strength haydite, intensity haydite in Midst density, low-density and high-strength haydite, at least one in extremely-low density haydite and resin-coated matrix, surface can be made up of three layers by hydrated sheath, innermost layer is the cohesion nitride layer of cationic high-molecular or modifies oxidant layer, centre is the outer polymeric layer of anionic macromolecule, outer layer is anti-caking agent, it it is hydrophobic layer generated reactive gas outside anti-caking agent, to increase proppant buoyancy, wherein the cohesion nitride layer of cationic high-molecular is coated on proppant aggregate surface, its adhesiveness is good, anti-shearing, select PDAC (diallyl dimethyl ammoniumchloride), LPEI (L-PEI), BPEI (branch-like polymine), at least one in PAMC and chitosan, the cohesion nitride layer of cationic high-molecular accounts for the 1-30% of aggregate weight, preferably 1%,Or adopt the hydroxyl modifying oxidant layer connection aggregate surface polymeric layer outer with anionic macromolecule, modifying oxidant layer and select in dimethyldichlorosilane, KH550 (gamma-aminopropyl-triethoxy-silane), KH560 (γ-glycidyl ether oxygen propyl trimethoxy silicane), KH590 (γ-mercaptopropyl trimethoxysilane), KH792 (γ-aminopropyl trimethoxysilane), A151 (VTES), chlorotriethyl silane, propyltrichlorosilan at least one, dressing agent accounts for the 0.1%-1% of aggregate weight, the outer polymeric layer of anionic macromolecule is coated on the cohesion nitride layer outer surface of cationic high-molecular, there is water-swellable function, anti-salinity 50000mg/L, and gel strength is high, SNFEM533 (reversed-phase emulsion type polyacrylamide) and the hexane of equal quality is selected to dilute, polyacrylamide, bisacrylamide, hydrolyzed polyacrylamide, octadecyl acrylamide, acrylic acid or polyacrylate, hydroxypropyl guar gum, carboxymethyl guar gum, hydrophobically modified guar gum, hydrophobic association polyacrylamide, carboxymethyl cellulose, hydroxypropyl cellulose, Carboxymethyl hydroxypropyl guar, emulsion polymer, polycaprolactone, polyvinyl acetate, at least one in polyvinyl alcohol, the outer polymeric layer of anionic macromolecule accounts for the 0.1%-1.5% of aggregate weight, the anti-caking agent of outer layer is prevented from the acid-sensitive deformation function of water from suspended prop deliquescence in atmosphere, postpone hydrolysis, select oil base additive, metal chelate crosslinMng agent, polyurethane resin coating in one or more, anti-caking agent accounts for aggregate weight and accounts for the 0.5% of aggregate weight.
The outer polymeric layer of anionic macromolecule of the present invention adopts following raw material to carry out synthetic: 15～30% acrylamides, 1～10% organic acid, 10～20% function monomers, 10～20%2-acrylamide-2-methyl propane sulfonic, 20～40% water, 0～15% initiator ammonium sulfite, described percentage ratio is mass percent, wherein organic acid be acrylic acid, acetic acid, formic acid one or more, regulate organic acid pH be 7.0-8.0, by initiator cause polymerization.
The acid-sensitive deformation Magnetic Tracer function of water of the present invention from suspended prop possibly together with cross-linking agent, cross-linking agent is selected in organic boron, organic zirconate, diglycidyl ether, maleic anhydride, glutaraldehyde, formaldehyde at least one, and cross-linking agent accounts for the 0.25%-1.25% of aggregate weight.
The acid-sensitive deformation Magnetic Tracer function of described water of the present invention contains at least one gel breaker in Ammonium persulfate., Magnesium dioxide, calper calcium peroxide from suspended prop, and gel breaker accounts for the 1%-5% of aggregate weight.
The acid-sensitive deformation Magnetic Tracer function of described water of the present invention contains antisludging agent from suspended prop, antisludging agent is at least one in phosphate, phosphate ester, phosphoric acid, organic phosphoric acid, polyacrylamide, acrylamide salts, methyl propane sulfonic acid and sulphonic acid copolymer, acrylic acid acrylamide methyl propane sulfonic acid copolymer, and antisludging agent accounts for the 1% of aggregate weight.
The acid-sensitive deformation Magnetic Tracer function of water of the present invention contains tracer from suspended prop, tracer is blended in the outer polymeric layer of anionic macromolecule of described proppant and pumps into shaft bottom together with proppant, tracer is for can radiate gamma-ray radioactive substance, can detect, record and analyze the position of proppant, concentration by underground monitoring instrument, tracer includes in Rare-Earth Magnetic material, hydrogen tritide, HTO, bracelet butanol, tritiated heptane at least one, and tracer accounts for the 1% of aggregate weight.
The outer polymeric layer of anionic macromolecule of the present invention also includes alcohol, including at least one in methanol, ethanol, ethylene glycol, glycerol, propanol, propylene glycol.
The acid-sensitive deformation Magnetic Tracer function of water of the present invention from the preparation method of suspended prop is: be first heated to by the aggregate of fracturing sand in 50 DEG C-100 DEG C addition mixer rotating cylinders, again cohesion for cationic high-molecular nitride layer is joined and aggregate obtains mixed sample, then by outer for anionic macromolecule polymeric layer with include methanol, ethanol, ethylene glycol, glycerol, propanol, at least one alcohol in propylene glycol joins with the ratio of 1-10:1 and obtains two-layer film sample in mixed sample, add anticaking agent again two-layer film sample sample mixes and open mixer after 30 seconds and again mix 7 minutes and obtain sample, then sample is put into drying baker dry 0.5-8h at 50-100 DEG C and obtains three layers covering material, namely the acid-sensitive deformation Magnetic Tracer function of water is prepared from suspended prop, finally acid-sensitive for water deformation Magnetic Tracer function removed sample from suspended prop from drying baker and sieve, packaging and entrucking, it is transported to scene and clear water, biogum, slippery water, cross-linked gel mixing carries out site operation.
The acid-sensitive deformation Magnetic Tracer function of water of the present invention, when suspended prop carries out on-the-spot pressing crack construction, is first injected in prepad fluid and clear water, slippery water, linear glue, biogum, cross-linked gel at least one, pressure break destination layer; Mix as load fluid with fracturing blender truck using at least one in suspended prop and clear water, slippery water, biogum, cross-linked gel for acid-sensitive for water deformation Magnetic Tracer function again, ground prop subterranean fracture is pumped into high-pressure pump, wherein the acid-sensitive deformation Magnetic Tracer function of water is 1-50:100 from suspended prop and clear water ratio, finally inject the displacement fluid of wellbore volume 2-3 times, extend formation fracture.
The acid-sensitive deformation Magnetic Tracer function of water of the present invention adopt when suspended prop produces in a large number flat board belt, elevator, feed back become a common practice give, finished product wind gives, screw feeder conveyer, automatic feeding vehicle, tiltedly carry in belt, belt conveyor, 5T forklift at least one as transporting equipment; Non-tower water feeder is as supply equipment; Pelletize pot, internal recycle three is adopted to separate in high-efficient powder concentrator at least one as Granulation Equipments; Adopt air box impulse bag-type dust remover as cleaner; Adopt in drum screen, vibrosieve, woven wire cloth testing sieve, electromagnetism sample pulverizer, ternary spin vibration sieve, slap type standard vibrating sieving machine at least one as screening installation; Adopt in rotary kiln, dehydrator, combustion fan, reductor, centrifugal fan, drying elevator, burner, high temperature reheating experimental furnace, chamber type electric resistance furnace, electric drying oven with forced convection, ultrasonic cleaner, furnace temperature control device, air drying device for glass articles, universal electric furnace at least one as drying equipment.
The present invention compared with prior art, has the advantage that fracturing fluid, proppant are united two into one by the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it may be achieved riverfrac treatment, reduces reservoir damage; Reducing the conventional fracturing fluid chemicals demands such as guar gum, reduce fracturing fluid volume 80%, can save time cost 25%, reduce water resource and make consumption 10%, chemical cost amount reduces by 15%, completes the more conventional construction totle drilling cost of construction cost and reduces by 27%; Comparing crosslinked fracturing fluid and be easier to degraded in the earth formation, polymer does not remain after breaking gel, reduces formation damage;Outer layer aquation tunic is macromolecule swellable resins, it is possible to reduce frictional resistance, reduces machine utilization; The acid-sensitive deformation Magnetic Tracer function of water does not need dosing from suspended prop in pressing crack construction process, simplifies site construction technology; Proppant migration ability improves, and fracture half-length increases by 71%; The acid-sensitive deformation Magnetic Tracer function of water can be uniformly distributed in crack with the state suspended from suspended prop, and paving is husky uniformly; Implement the fracturing engineering of shale plasticity micro-nano pore media (mud shale, fine and close oil gas or coalbed methane reservoir), pressure break is taken this proppant of sand and is had the suspension of " on not floating roof, under do not sink to the bottom " and adds the baffling characteristics that sand is excellent, the acid-sensitive deformation Magnetic Tracer function of water can optimize propped fracture area from suspended prop, improve effective percolation ability of man-made fracture, reduce reservoir damage, increase Oil/gas Well yield, reduce construction cost, improve pressure break efficiency, be with a wide range of applications and researching value.
Accompanying drawing illustrates:
Fig. 1 is the coating technique flow chart of the present invention.
Fig. 2 is that the acid-sensitive deformation Magnetic Tracer function of water of the present invention changes over curve from suspended prop, conventional fracturing sand with slippery water, conventional fracturing sand bed height.
Fig. 3 be the acid-sensitive deformation Magnetic Tracer function of water of the present invention from suspended prop clear water system viscosity with concentration change.
Detailed description of the invention:
The invention will be further described by the examples below and in conjunction with accompanying drawing.
Embodiment 1:
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment from suspended prop by aggregate (i.e. conventional proppants) and cationic polymerization nitride layer, anionic polymerisation nitride layer, agglomeration resistance oxidant layer forms, anionic polymerisation nitride layer water-swellable, increase particle volume, thus reducing bulk density, reduce proppant sedimentation velocity, anionic polymerisation nitride layer can form the network structure of winding after expanding, there is intensity and elasticity, compare haydite, it is better that quartz sand has circularity, frictional resistance is less, proppant can completely suspend in low viscosity fluid or clear water, make proppant transfer ability better, and sedimentation velocity is low, dust is less, sand drift is piled up width and is increased, flow conductivity decrease speed is made to slow down, this proppant can reduce the fracturing fluid demand to viscosity, avoid the problem that the pressure break stratum leak-offs such as current slippery water are big, promote the migration of the proppant degree of depth, reduce fracturing work discharge capacity, reduce proppant consumption, reduce cost.
The acid-sensitive function of water described in the present embodiment anionic polymerisation nitride layer consumption in suspended prop is the 0.1%-1.5% of aggregate consumption, the 10%-1000% that thickness is proppant aggregate volume after the expansion of all polymeric layers, the method of overlay film includes the one in following three kinds, proppant is preheated to swollen resin melt temperature, adds molten resin and carries out overlay film; Or mix with proppant immersion after swollen resin is dissolved with solvent, evaporate overlay film; Or proppant is mixed immersion, rotary evaporation overlay film with certain density emulsion-type swollen resin.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment is when suspended prop carries out overlay film, first by quartz sand, ceramsite sand or other aggregate materials are heated to 100-300 DEG C, it is transported in mixing container and cationic high-molecular interpolymer layer, the outer polymeric layer of anionic macromolecule mixes, heating, drying under about 85 DEG C hot-airs, moisture Control is below 0.5%, then pass through spraying process or full-boiled process further by uniform for additive overlay film on fracturing sand surface, blended further and pulverize, screening, sieved by standard screen, obtain 20-200 order different-grain diameter heatproof, the acid-sensitive deformation Magnetic Tracer function of water of anti-shearing high intensity is from suspended prop, it is respectively adopted jaw crusher, gyratory crusher, belt conveyor, electric drying oven with forced convection, electromagnetism sample pulverizer, ternary spin vibration sieve, slap type standard vibrating sieving machine, dehydrator is used for pulverizing, transmission, dry and sieve the acid-sensitive deformation Magnetic Tracer function of water prepared from suspended prop.
The acid-sensitive deformation Magnetic Tracer function transporting equipment when suspended prop produces in a large number of water described in the present embodiment be flat board belt, elevator, feed back become a common practice give, finished product wind send, screw feeder conveyer, automatic feeding vehicle, tiltedly carry belt, belt conveyor, 5T forklift; Supply equipment is non-tower water feeder; Granulation Equipments is that pelletize pot, internal recycle three separate high-efficient powder concentrator; Cleaner is air box impulse bag-type dust remover; Screening installation is drum screen, vibrosieve, woven wire cloth testing sieve, electromagnetism sample pulverizer, ternary spin vibration sieve, slap type standard vibrating sieving machine.
Drying equipment described in the present embodiment is rotary kiln, dehydrator, combustion fan, reductor, centrifugal fan, drying elevator, burner, high temperature reheating experimental furnace, chamber type electric resistance furnace, electric drying oven with forced convection, ultrasonic cleaner, furnace temperature control device, air drying device for glass articles, universal electric furnace, in drying steps, the acid-sensitive deformation Magnetic Tracer function of dry water obtained is in suspended prop, and the content of moisture is less than gross weight 0.5%.
The present embodiment can pass through monomer reaction polymerization and produce anionic polymer, and organic solvent and emulsifying agent are mixed to get oil phase; Reaction monomers is added to the water and makes aqueous solution, with in sodium hydroxide, potassium hydroxide at least one regulate pH be 7.0～7.5 aqueous phase; Reaction monomers is 10～20 mass %, 2-acrylamide-2-methyl propane sulfonic: 10～20 mass %, water: 20～40 mass %, initiator ammonium sulfite: 0～15 mass %, wherein said organic acid be acrylic acid, acetic acid, formic acid one or more, aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator and be polymerized.
Water acid-sensitive deformation Magnetic Tracer function prepared by the present embodiment has high temperature resistant from suspended prop, resistance to high salt, anti-shearing, high-intensity performance, optional hydrophobic monomer polymerization, increase zwitterionic amount of substance, increase charge density, increase salt-resistance, shear resistant and intensity, these monomers include N-methylene-bisacrylamide, methacrylate, divinylsulfone, polyethylene glycol monomethyl ether acrylate, polyethylene glycol dimethacrylate, Polyethylene Glycol, DesmodirN75, 1, 4-diazabicyclo, acrylamide, NNN'N'-tetramethylethylenediamine, hexamethylene, content of monomer is about 0.5%-8%.
The present embodiment can add cross-linking agent, cross-linking agent may select PEG diglycidyl ether, formaldehyde, glutaraldehyde, there is conjugated double bond compound such as divinyl compound, trivinyl compound, polynary epoxide, the polyether of polyhydric alcohol, the polyester of polyprotic acid, polyvalent metal compounds is zinc oxide such as, zinc acetate, ferrum oxide, calcium hydroxide, other cross-linking agent such as glycidyl ether, ethylenediamine, ethanedioic acid, phthalic acid, outer poly layer can be used for stopping water in air molecule for polyurethane, initiator can be peroxide such as potassium peroxydisulfate, Ammonium persulfate., benzoyl peroxide.
Water-soluble polymer described in the present embodiment (the outer polymeric layer of anionic macromolecule) optional SNFEM533, polyacrylamide, bisacrylamide, hydrolyzed polyacrylamide, octadecyl acrylamide, acrylic acid or polyacrylate, hydroxypropyl guar gum, carboxymethyl guar gum, hydrophobically modified guar gum, fenugreek gum, carboxymethyl guar gum, super guar gum, sesbania gum, Konjac glucomannan, tara gum, hydrophobic association polyacrylamide, carboxymethyl cellulose, hydroxypropyl cellulose, Carboxymethyl hydroxypropyl guar, emulsion polymer, polycaprolactone, polyvinyl acetate, at least one in polyvinyl alcohol.
The method that the present embodiment strengthens for hydroexpanding body mechanical strength of resin includes hydrophobicity alkane being grafted on polyacrylamide and completing, as formed octadecyl polyacrylamide. Optional disperse medium is pentane, hexamethylene, normal hexane, toluene, Ketohexamethylene.
The present embodiment can add silicon-containing compound and be modified, such as gamma-aminopropyl-triethoxy-silane, hexamethyldisiloxane.
Functional group's mutually reactive that three one polymer described in the present embodiment have, such as amino, carboxyl, hydroxyl, anhydride, isocyanates, acid chlorine compound, epoxy radicals, vinyl, amine etc., the particle with these functional groups is: polyvinyl alcohol, polyacrylic acid, polymine etc.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment is identical with conventional proppants floor treatment from suspended prop processing mode, carry out riverfrac treatment and do not need thickening agent, friction reducer, hydrated sheath can 2 DEG C-193 DEG C stable expansions, each proppant particles water-swellable, bulk density is from about 2.6g/cm3It is reduced to 1.3g/cm3Outer hydrogel layer mulling, pump into, the process shear stable such as microcrack infiltration, when 121 DEG C-176 DEG C, riverfrac treatment liquid viscosity not etc. can not reduce device requirement at 5-35cps, migration ability is common proppants 3 times, will not form the whaleback of blocking runner, reduces the demand of clear water desanding in slippery water, use the broken glue of conventional break agent, bigger at crack tip Area of bearing.
Outer for anionic macromolecule polymeric layer and at least one alcohol included in methanol, ethanol, ethylene glycol, glycerol, propanol, propylene glycol are mixed by the present embodiment with 1-10:1 ratio, are used for promoting that oil phase polymer better disperses in aqueous phase, i.e. phase reversal.
The present embodiment uses anti-caking agent such as calcium silicates, calcium carbonate, aerosil, Kaolin, corn starch, stearic acid sodium, bentonite, attapulgite, styrene maleic resin, Buddhist nun gram surfactant, triethanolamine titanium chelate, triethanolamine zirconium chelate, prevent proppant deliquescence in atmosphere, caking, too early aquation, use free-flow, exist caking and broken, exist caking and great majority all lump, four degree of solid block weigh differentiation anti-caking agent effect.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment do not sink to the bottom in clear water under suspended prop room temperature, not floating roof, reach " certainly " suspended state, can both reach from suspension effect at conventional slippery water, linear glue, biogum, cross-linked gel, may be used in combination.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment is met water volume from suspended prop and is become big, and apparent density reduces, according to different Reynolds numbers, it is possible to calculate individual particle free-falling velocity:
1. when NRe≤2,
2. as 2 < NRe < 500,
3. when NRe >=500,
Individual particle free settling in power-law fluid:
In power-law fluid, free settling speed is:
The hydrogel used is swelling in water, and the effective diameter of granule becomes big, big with water suction quantitative change, granule effective volume decrease in density. It is a part of that hydrogel is dissolved in water, and fluid viscosity increases slightly, and the two character makes proppant sedimentation velocity in a fluid reduce, and reaches " certainly " suspension effect.
The present embodiment innermost layer cationic high-molecular interpolymer layer or modification oxidant layer are in combinations with proppant aggregate surface negative charge or hydroxyl, zwitterion interacts, increase adhesiveness, play shear-stable effect, optional cationic polymer has diallyl dimethyl ammoniumchloride (PDAC), linear polyethyleneimine (LPEI), PAMC, chitosan, and optional dressing agent has in dimethyldichlorosilane, KH550, KH560, KH590, KH792, A151, chlorotriethyl silane, propyltrichlorosilan at least one.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment improves from suspended prop whaleback density in subterranean fracture, seam width is narrower, but it is basic effectively laid in oil district, it is farther that proppant is migrated in the earth formation, equal in quality proppant, fracture length doubles, and fracturing fluid consumption reduces by more than 50.
The present embodiment uses chemical gel breaker Ammonium persulfate. or Magnesium dioxide, polymer can be destroyed, infrared analysis, scanning electron microscope, EDS analyze and show that polymeric surface layer is completely exfoliated proppant aggregate after breaking gel, in-place permeability recovery rate 100%, injury can not be surveyed in stratum, after breaking gel, formation fracture there will be " secondary closure " phenomenon to polymer.
Additive is joined in proppant surface hole or internal void by the present embodiment, and additive includes antibacterial, gel breaker, paraffin remover, antisludging agent, tracer.
The outer polymeric layer of anionic macromolecule described in the present embodiment, the existing hydrophilic group of coating has again hydrophobic group, it is possible to connect ground floor and third layer, increases bonding force, has elasticity and resistance-reducing performance simultaneously. It is prone to the acid-sensitive deformation Magnetic Tracer function of water from the migration of suspended prop. The density of proppant first remains unchanged with proppant concentration, and after the concentration that reaches capacity, expansion space is limited, increases density with concentration and increases, and expansion multiple is adjustable according to polymer concentration, Bulking Time.
The present embodiment uses three layer coating system, or to add top layer hydrophobic layer be at least one in vegetable oil, Oleum Ricini, poly(ethylene oxide), fatty acid, or to use polyvinylpyrrolidone to be coated in sodium carbonate, at least one of potassium carbonate and citric acid, hydrochloric acid, Fluohydric acid. at least one generated reactive gas be the 4th layer system. Optional one layer or the two-layer therein of clad or multiple coatings combine. Block copolymer such as octadecyl polyquaternary ammonium salt, cetyl polyacrylamide can be used in cationic polymerization nitride layer to make polymer moieties hydrophilic segment oleophylic reach to promote to couple effect with anionic polymer interlayer.
The present embodiment outermost layer anti-caking agent fusing point, lower than 40 DEG C, can dissolve voluntarily under subsurface temperature and come off. There is water-soluble swelling properties layer swelling behavior within the scope of 40 DEG C-120 DEG C good. Being partly dissolved in a fluid, be exposed to by cohesive layer, cohesive layer has certain viscosity, and proppant can be made to keep together, and increases backflow control ability.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment can reach shear stable from suspended prop outer film coating material at 2 DEG C to 193 DEG C, for preventing the acid-sensitive deformation Magnetic Tracer function of water from suspended prop and air contact, can in the polymer or add add after polymer in vegetable oil, Oleum Ricini, wax, hydrogenated oil and fat, poly(ethylene oxide) at least one.
The acid-sensitive deformation Magnetic Tracer function of water described in the present embodiment includes white sand from suspended prop aggregate, palm fibre sand, high-density high-strength haydite, intensity haydite in Midst density, low-density and high-strength haydite, extremely-low density haydite, resin-coated matrix, waste rubber goods powder, oil field sludge, glass microballoon, the shale dregs of fat, flyash, gangue, metal-oxide, shuck, seed hulls, shell, walnut shell, packing material can be Kaolin, red soil clay, bauxite, quartz, violent powder, phenolic resin, epoxy resin, organic siliconresin, reinforcing material is haydite, metal, metallic compound, glass, it is of a size of 20-100 order, it is shaped as subsphaeroidal, but it is not limited to shaft-like, polygon-shaped, irregularly shaped, the haydite water acid-sensitive deformation Magnetic Tracer function prepared can design according to size grading and put into production use from suspended prop, the acid-sensitive deformation Magnetic Tracer function of waste old water from suspended prop from suspended prop, quartz sand water acid-sensitive deformation Magnetic Tracer function, can also mixing use, high density proppants mixing low-density propping agent is to reduce density.
Top layer hydrophobic layer described in the present embodiment is at least one in vegetable oil, Oleum Ricini, poly(ethylene oxide), fatty acid, when blasting 5%-20% nitrogen, gas can attracted to around proppant, or uses polyvinylpyrrolidone to be coated in sodium carbonate, at least one of potassium carbonate and citric acid, hydrochloric acid, Fluohydric acid. at least one reaction and produce carbon dioxide to increase the acid-sensitive deformation Magnetic Tracer function of water from suspended prop buoyancy.
The present embodiment can use polyhydric alcohol such as ethylene glycol, tetramethylolmethane, glycerol, Sorbitol, poly(ethylene oxide) and isocyanates such as diisocyanate, hexa-methylene isocyanate reaction to prepare polyurethane, under water vapor conditions, produce polyurethane foam, be coated on the acid-sensitive deformation magnetic function of water around suspended prop, reduce proppant density.
The present embodiment can use 0.1ml10% granules of polystyrene to mix with 0.9ml block copolymer in deionized water, block copolymer is Polyethylene Glycol, glycol polypropylene dissolves in deionized water, add 99.8% toluene, organic solvent mixes 12h with under block copolymer 1:1 volume room temperature, SURFACTANT ADSORPTION is in styrene pellets surface, the existence of block copolymer surfactant can make granules of polystyrene remain stable for, in ventilated chamber, heating in water bath sample to 98 DEG C, remove toluene solvant, finally, the block polymer surfactant that evaporative removal is unnecessary, clean granule 5 times, use deionized water Centrifugal dispersion, the polymer beads of preparation has the performance of water-swellable, expansion multiple is the 10%-1000% of particles of aggregates, the lower expansion character of cation existence weakens but does not lose, wherein bivalent cation impact is better than monovalent cation.
The acid-sensitive deformation magnetic function of water described in the present embodiment, when suspended prop is constructed, first injects in prepad fluid and clear water, slippery water, linear glue, biogum, cross-linked gel at least one, pressure break destination layer; Mix as load fluid with fracturing blender truck using at least one in suspended prop and clear water, slippery water, biogum, cross-linked gel for acid-sensitive for water deformation magnetic function again, pumping into ground prop subterranean fracture with high-pressure pump, wherein the acid-sensitive deformation magnetic function of water is 1-50:100 from suspended prop and clear water ratio; Inject displacement fluid, extend formation fracture.
Embodiment 2:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the PDAC solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, vacuum filters, dry at 80 DEG C, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; 3.3g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 3:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the PDAC solution of 200g tap water and 0.4g1% in sand, vibrate 5 minutes, vacuum filters, dry at 80 DEG C, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; 3.3g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 4:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 0.4g1% in sand, vibrate 5 minutes, vacuum filters, dry at 80 DEG C, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; 3.3g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 5:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder;Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; 3.3g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 6:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase, aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate and be polymerized, at 80 DEG C, react 5h. The polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 7:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; Adding 4g1% Polyethylene Glycol Bisglycidyl Ether, open mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve.
Embodiment 8:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; Adding 4g1% Biformyl, open mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve.
Embodiment 9:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; Adding 4g1% Polyethylene Glycol Bisglycidyl Ether, open mixer by sand and polymer mixed 7 minutes, add 0.4g paraffin, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve.
Embodiment 10:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20g carboxymethyl cellulose and glycerol with the ratio of 9:1; Adding 4g1% Polyethylene Glycol Bisglycidyl Ether, open mixer by sand and polymer mixed 7 minutes, add 0.4g paraffin, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve.
Embodiment 11:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder;Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20g carboxymethyl cellulose and glycerol with the ratio of 9:1; Adding 4g1% Polyethylene Glycol Bisglycidyl Ether, open mixer by sand and polymer mixed 7 minutes, add 0.4g paraffin, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve. Add 2g10% ammonium persulfate solution.
Embodiment 12:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20g carboxymethyl cellulose; Adding 4g1% Polyethylene Glycol Bisglycidyl Ether, open mixer by sand and polymer mixed 7 minutes, add 0.4g paraffin, sample is dry 1h at 100 DEG C; From drying baker, remove sample and sieve.
Embodiment 13:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Acrylamide, acrylic acid, ethylene glycol, polyethylene glycol dimethacrylate are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase; Aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate 35g and be polymerized, at 80 DEG C, react 5h, the polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 14:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath is revolved and is evaporated off anhydrating point, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; Add 4g1% Polyethylene Glycol Bisglycidyl Ether, add 30g Polyethylene Glycol and mix 1 minute, add 2.5g isocyanates, react more than 5 minutes, washing with methanol, open mixer by sand and polymer mixed 7 minutes, sample reacts with steam at 100 DEG C, dry 1h after reaction, removes sample from drying baker and sieves.
Embodiment 15:
500g40/70 order fracturing sand is added in mixer rotating cylinder and is heated to 120 DEG C; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Octadecyl acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase; Aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate and be polymerized, at 80 DEG C, react 5h. The polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 16:
500g40/70 order haydite is added in mixer rotating cylinder and is heated to 120 DEG C; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Octadecyl acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase; Aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate and be polymerized, at 80 DEG C, react 5h. The polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 17:
The present embodiment will be heated to 120 DEG C in 500g40/70 order waste rubber powder addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Octadecyl acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase; Aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate and be polymerized, at 80 DEG C, react 5h. The polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 18:
The present embodiment will be heated to 120 DEG C in 500g40/70 order oil field sludge powder addition mixer rotating cylinder; Adding the LPEI solution of 200g tap water and 4g1% in sand, vibrate 5 minutes, at 80 DEG C, water-bath rotation is evaporated off anhydrating point, in there-necked flask, normal hexane and Span-80 is mixed to get oil phase; Octadecyl acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic are added to the water and make aqueous solution, with sodium hydroxide regulate pH be 7.0～7.5 aqueous phase; Aqueous phase is added stirring in oil phase and makes its emulsifying, add initiator ammonium persulfate and be polymerized, at 80 DEG C, react 5h. The polymer obtained and glycerol are added sand with the ratio of 7:1,3.2g aerosil is added in sample and again mixes 30 seconds; Opening mixer by sand and polymer mixed 7 minutes, sample is dry 1h at 85 DEG C; From drying baker, remove sample and sieve.
Embodiment 19:
The present embodiment will be heated to 120 DEG C in 500g40/70 order fracturing sand addition mixer rotating cylinder; Adding the PDAC solution of 200g tap water and 0.4g1% in sand, vibrate 5 minutes, vacuum filters, dry at 80 DEG C, joins in sand by 20gEM533 and glycerol with the ratio of 9:1; Adding metallo-chelate 5g and also mix 30s, open mixer by sand and polymer mixed 7 minutes, sample is dry 30min at 100 DEG C; From drying baker, remove sample and sieve.
The present embodiment ph measurement determines the acid-sensitive deformation Magnetic Tracer function of water from suspended prop aqueous solution, obtain pH9.7, observe with light microscope, 1-3 micron when outer polymers is not swelling, the metering hydration swelling time, in viscometer determining difference case study on implementation, the acid-sensitive function of function water was from suspended prop clear water solution viscosity 5-7cp less than 30s.Temperature adaptation scope is at 2 DEG C-193 DEG C. Obtain changing such as following table with expansion multiple particle diameter, apparent density:
Comparative example 2 and 12 is it can be seen that the addition of glycerol, it is possible to be effectively increased the acid-sensitive deformation Magnetic Tracer function of water from suspended prop bed height; Comparative example 3 and 14 is it can be seen that the preparation of polyurethane foam, and the acid-sensitive deformation Magnetic Tracer function of water declines from suspended prop apparent density; It is simultaneously introduced hydrophobic group, improve the stability of hydroscopic high-molecular resin, waste rubber powder, the shale dregs of fat, gangue, oil field sludge addition reduce carrying capacity of environment, adding of tristerin improves proppant dissolubility and prevents and the contacting of humid air; Being added with of polyacrylamide is beneficial to the acid-sensitive deformation Magnetic Tracer function of water from the resistance-reducing performance of suspended prop. Using the broken glue of Ammonium persulfate., measure resume permeability rate 100%, injury can not be surveyed from suspended prop in stratum by this heatproof, salt tolerant, anti-shearing, the acid-sensitive deformation Magnetic Tracer function of high intensity water.
Claims (9)
1. the acid-sensitive deformation Magnetic Tracer function of water is from suspended prop, it is characterized in that including aggregate and surface can hydrated sheath, wherein aggregate includes white sand, palm fibre sand, high-density high-strength haydite, intensity haydite in Midst density, low-density and high-strength haydite, at least one in extremely-low density haydite and resin-coated matrix, surface can be made up of three layers by hydrated sheath, innermost layer is the cohesion nitride layer of cationic high-molecular or modifies oxidant layer, centre is the outer polymeric layer of anionic macromolecule, outer layer is anti-caking agent, it it is hydrophobic layer generated reactive gas outside anti-caking agent, to increase proppant buoyancy, wherein the cohesion nitride layer of cationic high-molecular is coated on proppant aggregate surface, its adhesiveness is good, anti-shearing, select diallyl dimethyl ammoniumchloride, L-PEI, branch-like polymine, at least one in PAMC and chitosan, the cohesion nitride layer of cationic high-molecular accounts for the 1-30 of aggregate weight, or adopt the hydroxyl modifying oxidant layer connection aggregate surface polymeric layer outer with anionic macromolecule, modifying oxidant layer and select in dimethyldichlorosilane, gamma-aminopropyl-triethoxy-silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane, γ-aminopropyl trimethoxysilane, VTES, chlorotriethyl silane, propyltrichlorosilan at least one, dressing agent accounts for the 0.1%-1% of aggregate weight, the outer polymeric layer of anionic macromolecule is coated on the cohesion nitride layer outer surface of cationic high-molecular, there is water-swellable function, anti-salinity 50000mg/L, and gel strength is high, the hexane selecting reversed-phase emulsion type polyacrylamide and equal quality dilutes, polyacrylamide, bisacrylamide, hydrolyzed polyacrylamide, octadecyl acrylamide, acrylic acid or polyacrylate, hydroxypropyl guar gum, carboxymethyl guar gum, hydrophobically modified guar gum, hydrophobic association polyacrylamide, carboxymethyl cellulose, hydroxypropyl cellulose, Carboxymethyl hydroxypropyl guar, emulsion polymer, polycaprolactone, polyvinyl acetate, at least one in polyvinyl alcohol, the outer polymeric layer of anionic macromolecule accounts for the 0.1%-1.5% of aggregate weight, the anti-caking agent of outer layer is prevented from the acid-sensitive deformation function of water from suspended prop deliquescence in atmosphere, postpone hydrolysis, select oil base additive, metal chelate crosslinMng agent, polyurethane resin coating in one or more, anti-caking agent accounts for aggregate weight and accounts for the 0.5% of aggregate weight.
2. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterized in that the outer polymeric layer of described anionic macromolecule adopts following raw material to carry out synthetic: 15～30% acrylamides, 1～10% organic acid, 10～20% function monomers, 10～20%2-acrylamide-2-methyl propane sulfonic, 20～40% water, 0～15% initiator ammonium sulfite, described percentage ratio is mass percent, wherein organic acid is acrylic acid, acetic acid, one or more of formic acid, regulating organic acid pH is 7.0-8.0, polymerization is caused by initiator.
3. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterized in that possibly together with cross-linking agent, cross-linking agent is selected in organic boron, organic zirconate, diglycidyl ether, maleic anhydride, glutaraldehyde, formaldehyde at least one, and cross-linking agent accounts for the 0.25%-1.25% of aggregate weight.
4. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterised in that possibly together with gel breaker at least one in Ammonium persulfate., Magnesium dioxide, calper calcium peroxide, gel breaker accounts for the 1%-5% of aggregate weight.
5. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterized in that possibly together with antisludging agent, antisludging agent is at least one in phosphate, phosphate ester, phosphoric acid, organic phosphoric acid, polyacrylamide, acrylamide salts, methyl propane sulfonic acid and sulphonic acid copolymer, acrylic acid acrylamide methyl propane sulfonic acid copolymer, and antisludging agent accounts for the 1% of aggregate weight.
6. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterized in that possibly together with tracer, during use, tracer is blended in the outer polymeric layer of anionic macromolecule and pumps into shaft bottom, tracer is for can radiate gamma-ray radioactive substance, can detect, record and analyze the position of proppant, concentration by underground monitoring instrument, tracer includes in Rare-Earth Magnetic material, hydrogen tritide, HTO, bracelet butanol, tritiated heptane at least one, and tracer accounts for the 1% of aggregate weight.
7. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterised in that the outer polymeric layer of described anionic macromolecule also includes alcohol, including at least one in methanol, ethanol, ethylene glycol, glycerol, propanol, propylene glycol.
8. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterised in that the preparation method of this proppant is: be first heated to by the aggregate of fracturing sand in 50 DEG C-100 DEG C addition mixer rotating cylinders, again cohesion for cationic high-molecular nitride layer is joined and aggregate obtains mixed sample, then by outer for anionic macromolecule polymeric layer with include methanol, ethanol, ethylene glycol, glycerol, propanol, at least one alcohol in propylene glycol joins with the ratio of 1-10:1 and obtains two-layer film sample in mixed sample, add anticaking agent again two-layer film sample sample mixes and open mixer after 30 seconds and again mix 7 minutes and obtain sample, then sample is put into drying baker dry 0.5-8h at 50-100 DEG C and obtains three layers covering material, namely the acid-sensitive deformation Magnetic Tracer function of water is prepared from suspended prop, finally acid-sensitive for water deformation Magnetic Tracer function removed sample from suspended prop from drying baker and sieve, packaging and entrucking, it is transported to scene and clear water, biogum, slippery water, cross-linked gel mixing carries out site operation.
9. according to claim 1 the acid-sensitive deformation Magnetic Tracer function of water from suspended prop, it is characterized in that the acid-sensitive function of described water is when suspended prop carries out on-the-spot pressing crack construction, first inject in prepad fluid and clear water, slippery water, linear glue, biogum, cross-linked gel at least one, pressure break destination layer;Mix as load fluid with fracturing blender truck using at least one in suspended prop and clear water, slippery water, biogum, cross-linked gel for acid-sensitive for water deformation Magnetic Tracer function again, ground prop subterranean fracture is pumped into high-pressure pump, wherein the acid-sensitive deformation Magnetic Tracer function of water is 1-50:100 from suspended prop and clear water ratio, finally inject the displacement fluid of wellbore volume 2-3 times, extend formation fracture.
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