CN103194204B - A kind of propping agent for coal-seam gas and shale gas waterfrac treatment and preparation method thereof - Google Patents
A kind of propping agent for coal-seam gas and shale gas waterfrac treatment and preparation method thereof Download PDFInfo
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- CN103194204B CN103194204B CN201310123782.3A CN201310123782A CN103194204B CN 103194204 B CN103194204 B CN 103194204B CN 201310123782 A CN201310123782 A CN 201310123782A CN 103194204 B CN103194204 B CN 103194204B
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Abstract
The invention discloses a kind of propping agent for coal-seam gas and shale gas waterfrac treatment and preparation method thereof; large to solve propping agent density of the prior art; the upper part in crack at a distance and crack all can not obtain the problem of effective filling; comprise step: make hollow haydite; bauxitic clay is adopted to do raw material; be ground into 200-400 object single-size; add water, Manganse Dioxide, resin agitating become liquid mixture; afterwards described liquid mixture is dried at 500-1000 DEG C of temperature, obtained described hollow haydite after cooling; Be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C; Hollow haydite after above-mentioned sintering is carried out at least 1 resin coated, obtain described propping agent, obtained propping agent, intensity is high, density is low, substantially increases of the fracturing fluidly to take husky ability, increases fracturing propping agents packing volume, improve fracturing effect, make flow conductivity improve 3-4 doubly.
Description
Technical field
The present invention relates to the unconventional resources technology fields such as hydrofracturing method exploiting coal bed methane, shale gas, particularly a kind of propping agent and preparation method thereof that can be used for coal-seam gas, shale gas waterfrac treatment.This proppant strength high-density is low, enhances the effect of pressure break, improves flow conductivity.
Background technology
Coal-seam gas is the Unconventional forage be stored in adsorbed state in coal seam, is commonly called as " gas ", and its main component is methane, and calorific value is 2-5 times of general coal.Shale gas is the Sweet natural gas exploiting out from shale bed, and reservoir space based on crack, and is deposited with adsorbed gas and the tax of Water Soluble Gas form, is also a kind of important unconventional gas resources.
The important reoovery method of coal-seam gas and shale gas comprises drilling well exploitation and hydrofracturing method is exploited (or claiming Splitting Method).Wellhole can be communicated with coal seam natural fissure by coal bed fracturing transformation effectively, thus when water pumping gas production, broadly distributes the pressure drop of near wellbore, increases production capacity, increases desorption of gases speed.Therefore, in CBM exploration and development, hydrofracturing method, as a kind of important measures, is widely used.
In typical waterfrac treatment process, comprise the fracturing liquid of Selid propping agent, be injected in pit shaft under the pressure being enough to produce or expand the crack in coal seam or shale bed.This propping agent deposits with supporting crack in crack, and this makes coal-seam gas or shale gas shift to pit shaft from stratum.Propping agent plays very crucial effect in waterfrac treatment.Now main in CBM Fracturing is natural siliceous sand, and main in shale gas pressure break is sintering ceramsite and quartz sand, and the relative density of sintering ceramsite and quartz sand is 2.7-3.3.
In hydraulic fracturing job, desirable propping agent should possess following characteristics: 1) relative density is little, is convenient to pump into underground; 2) intensity is high, for can not be crushed in heavy duty service; 3) unreactiveness is good, high temperature resistant and can resist the erosion of oil, acid, salt solution etc. in stratum; 4) circularity is good, to keep good space between proppant particles.
Natural siliceous sand and sintering ceramsite have that intensity is high, good chemical stability, but for coal-seam gas, shale gas, bad adaptability, major cause is that its density is large, and needing high viscosity to take husky liquid could realize pressure break, and high viscosity to take husky liquid be some polymer substances, the too low not easily broken glue of Yin Wendu in coal bed gas well, cause that energy consumption is high, formation injury is large, aftertreatment is complicated, costly.The more important thing is, because sintering ceramsite and quartz sand are because settling velocity is soon in immediate vicinity of wellbore rapid subsidence, the crack of farther place and the upper part in crack all can not obtain effective filling, directly affects the effect of pressure break and the raising of later output.Therefore a kind of high strength, low-density propping agent and preparation method thereof the development significance to coal-seam gas, shale gas is developed great.
Summary of the invention
The object of the present invention is to provide a kind of propping agent for coal-seam gas and shale gas waterfrac treatment and preparation method thereof, large to solve propping agent density of the prior art, the upper part in crack at a distance and crack all can not obtain the problem of effective filling.
Technical scheme of the present invention is achieved in that
A kind of propping agent for coal-seam gas and shale gas waterfrac treatment, described propping agent is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, described weight resin accounts for the 1.5-17.5% of described propping agent weight, the density of this propping agent is 1.2-1.3, cracking pressure is 20-100MPa, circularity 8-10.
Prepare a method for the described propping agent for coal-seam gas and shale gas waterfrac treatment, comprise the following steps:
1) hollow haydite is made
Adopt bauxitic clay to do raw material, be ground into 200-400 object single-size, add water, Manganse Dioxide, resin agitating become liquid mixture, afterwards described liquid mixture is dried at 500-1000 DEG C of temperature, obtained described hollow haydite after cooling;
2) be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C;
3) the hollow haydite after above-mentioned sintering is carried out at least 1 resin coated, obtain described propping agent.
In step 1), in 200-400 object bauxitic clay single-size, add Manganse Dioxide, intensity that resin can strengthen bauxite grains, be beneficial to 200-400 object bauxitic clay single-size and form hollow haydite; Step 2) be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C, object is the intensity in order to increase described hollow haydite; It is coated that hollow haydite after sintering is carried out at least 1 resin by step 3), can strengthen the intensity of haydite further, and can increase the circularity of hollow haydite, and then improve the flow conductivity of propping agent of the present invention.
Preferably, described hollow haydite particle diameter is 20-40 order.Hollow haydite particle diameter is 20-40 order, and obtained propping agent density is between 1.2-1.3.
Preferably, described resin is coated be at every turn by described sintering after hollow haydite resol ethanolic soln at 25-30 DEG C, soak 22-26 hour, the resol ethanolic soln that elimination is unnecessary, solidifies 2-6 hour by soaked hollow haydite afterwards at 60-100 DEG C; Then be warming up to 160-200 DEG C and continue solidification 2-6 hour.In the inventive method, twice step curing is carried out to the haydite soaking high-molecular resin solution, and first time solidification value lower than second time solidification value, also be conducive to increasing the homogeneity that deposited resin is wrapped up on haydite surface, thus increase the circularity of propping agent prepared by the inventive method.
Preferably, described resin is coated is that 1-7 resin is coated.Wrap up in deposited number of times more, the intensity of haydite is larger.According to the difference of the cracking pressure that coal-seam gas, shale gas pressure break use, the number of times of the coated resin of adjustable and quantity produce series product, as produced the series product such as 28MPa, 52MPa, 69MPa under the low-density condition of guarantee.
Further preferably, described resin is coated is that 3 resins are coated.
Preferably, the coated each coated weight of described resin accounts for the 1.5-2.5% of described propping agent weight.Each coated weight accounts for described propping agent weight and is less than 1.5%, once coatedly increases DeGrain to haydite intensity, needs more times coatedly just can reach required intensity; Each coated weight accounts for described propping agent weight and is greater than 2.5%, there will be coated uneven phenomenon, affects the circularity of haydite.
As preferably, the weight ratio of described bauxitic clay, water, Manganse Dioxide and resin is 39:60:0.5:0.5.The weight ratio of bauxitic clay, water, Manganse Dioxide and resin is 39:60:0.5:0.5, easily prepares hollow haydite and obtained hollow haydite intensity is high under this weight ratio condition.
Preferably, the ethanolic soln mass concentration of described resol is 5-25%.
Owing to have employed technique scheme; a kind of propping agent for coal-seam gas and shale gas waterfrac treatment and preparation method thereof; large to solve propping agent density of the prior art; the upper part in crack at a distance and crack all can not obtain the problem of effective filling; comprise step: make hollow haydite; bauxitic clay is adopted to do raw material; be ground into 200-400 object single-size; add water, Manganse Dioxide, resin agitating become liquid mixture; afterwards described liquid mixture is dried at 500-1000 DEG C of temperature, obtained described hollow haydite after cooling; Be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C; Hollow haydite after above-mentioned sintering is carried out at least 1 resin coated, obtain described propping agent, obtained propping agent, intensity is high, density is low, substantially increases of the fracturing fluidly to take husky ability, increases fracturing propping agents packing volume, improve fracturing effect, make flow conductivity improve 3-4 doubly.
Beneficial effect of the present invention is:
Propping agent density for coal-seam gas and shale gas waterfrac treatment prepared by the inventive method reduces greatly.In prior art, propping agent used is sintering ceramsite and quartz sand, and its relative density is 2.7-3.3, and of the present inventionly wraps up in the hollow haydite density after deposited resin between 1.2-1.3.Close with the liquid-tight degree of the pressure break such as active water, slippery water, substantially increase and of the fracturing fluidly take husky ability.Propping agent density prepared by the inventive method reduces, and the Pump pressure of fracturing of equipment during pressure break is reduced, directly can reduce the quantity of pressure break pump truck, also serve certain effect simultaneously to the protection of fracturing unit.In addition, this propping agent density reduces, and can use without polymer or a small amount of high molecular fracturing liquid, the pollution of such formation reduces greatly, reduce the blocking of polymer substance fracture, microfracture in fracturing liquid, increase the effect of pressure break, improve flow conductivity.
The most important thing is that the propping agent density prepared due to the inventive method reduces, make propping agent can arrive the crack of farther place and the upper part in crack, directly increase fracturing propping agents packing volume, make flow conductivity improve 3-4 doubly, corresponding output also improves 3-4 doubly.
In addition, adopt hydrofracturing method exploiting coal bed methane and shale gas to need a large amount of water, use high-strength low-density propping agent prepared by the inventive method, greatly reduce water consumption, saving water resource reduces pressure break cost simultaneously, has very large economic advantages; China is had great importance because lack of water affects shale gas exploitation.Preparation method's technique of the propping agent for coal-seam gas and shale gas waterfrac treatment of the present invention is simple in addition, is suitable for industrial applications.
Certainly, nutshell (as jujube nucleus, nut-shell etc.) also can be used to wrap up in deposited aggregate, adopt the inventive method for the preparation of the propping agent of coal-seam gas and shale gas waterfrac treatment.Its advantage is exactly that proportion is lighter, and about 0.8, do not need sintering in addition, production cost is lower.But, adopt nutshell to wrap up in deposited aggregate, have following defect: 1) circularity is lower than 5, have impact on flow conductivity; 2) cracking pressure is inadequate, can only reach 28MPa, be only applicable to CBM Fracturing; 3) nutshell belongs to fibre substrate matrix material, and material source is unstable, and quality control is also difficult in addition.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the proppant production method for coal-seam gas and shale gas waterfrac treatment of the present invention.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of propping agent for coal-seam gas and shale gas waterfrac treatment, described propping agent is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, described weight resin accounts for the 1.5-17.5% of described propping agent weight, the density of this propping agent is 1.2-1.3, cracking pressure is 20-100MPa, circularity 8-10.
For the preparation of a method for the propping agent of coal-seam gas and shale gas waterfrac treatment, comprise the following steps:
1) hollow haydite is made
Adopt bauxitic clay to do raw material, be ground into 200-400 object single-size, add water, Manganse Dioxide, resin agitating become liquid mixture, afterwards described liquid mixture is dried at 500-1000 DEG C of temperature, obtained described hollow haydite after cooling;
2) be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C;
3) the hollow haydite after above-mentioned sintering is carried out at least 1 resin coated, obtain described propping agent.
Described hollow haydite particle diameter is 20-40 order.Preparing particle diameter is that the hollow haydite of 20-40 object can adopt ram pump nozzle inside diameter to be that described liquid mixture is ejected into drying tower and dries by 20-40 object high pressure plunger pump.Adopt this method to prepare the hollow haydite of 20-40 object, the hollow haydite particles of preparation is even, and circularity is good, and this method is applicable to commercial application.
Described resin is coated be at every turn by described sintering after hollow haydite mass concentration be that the resol ethanolic soln of 5%-25% soaks 22-26 hour at 25-30 DEG C, the resol ethanolic soln that elimination is unnecessary, solidifies 2-6 hour by soaked hollow haydite afterwards at 60-100 DEG C; Then be warming up to 160-200 DEG C and continue solidification 2-6 hour.
Described resin is coated is that 1-7 resin is coated.
Described resin is coated is that 3 resins are coated.
The coated each coated weight of described resin accounts for the 1.5-2.5% of described propping agent weight.
The weight ratio of described bauxitic clay, water, Manganse Dioxide and resin is 39:60:0.5:0.5.
The ethanolic soln mass concentration of described resol is 5-25%.
Embodiment 1:
Propping agent preparation process for coal-seam gas and shale gas waterfrac treatment is as follows:
1) bauxite powder is broken into 200-300 object single-size, is that 39:60:0.5:0.5 adds water, manganese dioxide powder, resin in above-mentioned single-size according to the weight ratio of bauxitic clay, water, Manganse Dioxide and resin, is stirred to liquid mixture; Adopting ram pump nozzle inside diameter to be that described liquid mixture is ejected into by 20-40 object high pressure plunger pump is highly, on the drying tower of 20 meters, dry, the hollow haydite of formation 20-40 object at 800 DEG C;
2) the hollow haydite prepared by step 1) is put into rotary kiln, 1300 DEG C sinter 4 hours, then cool, obtain the hollow haydite of 20-40 object high strength;
3) by step 2) the obtained hollow haydite of the 20-40 object high strength ethanolic soln of putting into the resol of 10% soaks 24 hours, the resin solution that after immersion, elimination is unnecessary, the curing apparatus put into by the hollow haydite soaked in the ethanolic soln of the resol of 10% with stirring mechanism carries out first time solidification, solidification value is 80 DEG C, and set time is 4 hours;
4) first time solidifies and is completely warming up to 180 DEG C and then carries out second time solidification, obtains and wraps up in the hollow haydite of deposited resin; Twice solidification process all carries out under the continuous stirring of stirring mechanism, makes solidification evenly fully.
5) repeating step 3) and step 4), the haydite wrapping up in deposited resin step 4) prepared wraps up in deposited resin again, obtains the propping agent for coal-seam gas waterfrac treatment.
Propping agent prepared by the present embodiment is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, resin wrap up in that deposited weight is propping agent 3%, density is 1.28, circularity is 9, can bear the pressure of 28MPa, and the large density of intensity is low, be suitable for as the propping agent in coal-seam gas waterfrac treatment, support effect is good.
Embodiment 2:
1) bauxite powder is broken into 300-400 object single-size, is that 39:60:0.5:0.5 adds water, manganese dioxide powder, resin in above-mentioned single-size according to the weight ratio of bauxitic clay, water, Manganse Dioxide and resin, is stirred to liquid mixture; Adopting ram pump nozzle inside diameter to be that described liquid mixture is ejected into by 20-30 object high pressure plunger pump is highly, on the drying tower of 20 meters, dry, the hollow haydite of formation 20-30 object at 1000 DEG C;
2) the hollow haydite prepared by step 1) is put into rotary kiln, 1500 DEG C sinter 5 hours, then cool, obtain the hollow haydite of 20-30 object high strength;
3) by step 2) the obtained hollow haydite of the 20-30 object high strength ethanolic soln of putting into the resol of 15% soaks 18 hours, the resin solution that after immersion, elimination is unnecessary, the curing apparatus put into by the hollow haydite soaked in the ethanolic soln of the resol of 15% with stirring mechanism carries out first time solidification, solidification value is 100 DEG C, and set time is 5 hours;
4) first time solidifies and is completely warming up to 200 DEG C and then carries out second time solidification, obtains and wraps up in the hollow haydite of deposited resin; Twice solidification process all carries out under the continuous stirring of stirring mechanism, makes solidification evenly fully.
5) repeating step 3) and step 4), the hollow haydite wrapping up in deposited resin step 4) prepared carries out wrapping up in deposited resin for twice again, obtains the propping agent for coal-seam gas waterfrac treatment.
Propping agent prepared by the present embodiment is the hollow haydite of the 20-30 object bauxitic clay wrapping up in deposited resin, resin wrap up in that deposited weight is propping agent 5%, density is 1.27, circularity is 8.5, the pressure of 40MPa can be born, the large density of intensity is low, and be suitable for as the propping agent in coal-seam gas waterfrac treatment, support effect is good.
Embodiment 3:
1) bauxite powder is broken into 300-400 object single-size, in above-mentioned single-size, adds water, manganese dioxide powder, resin, be stirred to liquid mixture; Adopting ram pump nozzle inside diameter to be that described liquid mixture is ejected into by 30-40 object high pressure plunger pump is highly, on the drying tower of 20 meters, dry, the hollow haydite of formation 30-40 object at 900 DEG C;
2) the hollow haydite prepared by step 1) is put into rotary kiln, 1200 DEG C sinter 5 hours, then cool, obtain the hollow haydite of 30-40 object high strength;
3) by step 2) the obtained hollow haydite of the 30-40 object high strength ethanolic soln of putting into the resol of 20% soaks 15 hours, the resin solution that after immersion, elimination is unnecessary, the curing apparatus put into by the hollow haydite soaked in the ethanolic soln of the resol of 20% with stirring mechanism carries out first time solidification, solidification value is 60 DEG C, and set time is 3 hours;
4) first time solidifies and completely curing apparatus is warming up to 180 DEG C and then carries out second time solidification, obtains and wraps up in the hollow haydite of deposited resin; Twice solidification process all carries out under the continuous stirring of stirring mechanism, makes solidification evenly fully.
5) repeating step 3) and step 4), the hollow haydite wrapping up in deposited resin step 4) prepared carries out wrapping up in deposited resin three times again, obtains the propping agent for coal-seam gas and shale gas waterfrac treatment.
Propping agent prepared by the present embodiment is the hollow haydite of the 30-40 object bauxitic clay wrapping up in deposited resin, resin wrap up in that deposited weight is propping agent 6.5%, density is 1.25, circularity is 8.5, the pressure of 525MPa can be born, the large density of intensity is low, and be suitable for as the propping agent in coal-seam gas and shale gas waterfrac treatment, support effect is good.
Embodiment 4:
1) bauxite powder is broken into 200-400 object single-size, in above-mentioned single-size, adds water, manganese dioxide powder, resin, be stirred to liquid mixture; Adopting ram pump nozzle inside diameter to be that described liquid mixture is ejected into by 20-40 object high pressure plunger pump is highly, on the drying tower of 20 meters, dry, the hollow haydite of formation 20-40 object at 800 DEG C;
2) the hollow haydite prepared by step 1) is put into rotary kiln, 1400 DEG C sinter 4 hours, then cool, obtain the hollow haydite of 20-40 object high strength;
3) by step 2) the obtained hollow haydite of the 20-40 object high strength ethanolic soln of putting into the resol of 20% soaks 18 hours, the resin solution that after immersion, elimination is unnecessary, the curing apparatus put into by the hollow haydite soaked in the ethanolic soln of the resol of 20% with stirring mechanism carries out first time solidification, solidification value is 90 DEG C, and set time is 5 hours;
4) first time solidifies and completely curing apparatus is warming up to 160 DEG C and then carries out second time solidification, obtains and wraps up in the hollow haydite of deposited resin; Twice solidification process all carries out under the continuous stirring of stirring mechanism, makes solidification evenly fully.
5) repeating step 3) and step 4), the hollow haydite wrapping up in deposited resin step 4) prepared carries out wrapping up in deposited resin five times again, obtains the propping agent for shale gas waterfrac treatment.
Propping agent prepared by the present embodiment is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, resin wrap up in that deposited weight is propping agent 10.5%, density is 1.22, circularity is 9, the pressure of 80MPa can be born, the large density of intensity is low, and be suitable for as the propping agent in shale gas waterfrac treatment, support effect is good.
Embodiment 5:
1) bauxite powder is broken into 200-400 object single-size, in above-mentioned single-size, adds water, manganese dioxide powder, resin, be stirred to liquid mixture; Adopting ram pump nozzle inside diameter to be that described liquid mixture is ejected into by 20-40 object high pressure plunger pump is highly, on the drying tower of 20 meters, dry, the hollow haydite of formation 20-40 object at 900 DEG C;
2) the hollow haydite prepared by step 1) is put into rotary kiln, 1600 DEG C sinter 3 hours, then cool, obtain the hollow haydite of 20-40 object high strength;
3) by step 2) the obtained hollow haydite of the 20-40 object high strength ethanolic soln of putting into the resol of 15% soaks 18 hours, the resin solution that after immersion, elimination is unnecessary, the curing apparatus put into by the hollow haydite soaked in the ethanolic soln of the resol of 15% with stirring mechanism carries out first time solidification, solidification value is 70 DEG C, and set time is 2 hours;
4) first time solidifies and completely curing apparatus is warming up to 190 DEG C and then carries out second time solidification, obtains and wraps up in the hollow haydite of deposited resin; Twice solidification process all carries out under the continuous stirring of stirring mechanism, makes solidification evenly fully.
5) repeating step 3) and step 4), the hollow haydite wrapping up in deposited resin step 4) prepared carries out wrapping up in deposited resin four times again, obtains the propping agent for shale gas waterfrac treatment.
Propping agent prepared by the present embodiment is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, resin wrap up in that deposited weight is propping agent 8%, density is 1.24, circularity is 8.5, the pressure of 69MPa can be born, the large density of intensity is low, and be suitable for as the propping agent in shale gas waterfrac treatment, support effect is good.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the propping agent for coal-seam gas and shale gas waterfrac treatment, it is characterized in that: described propping agent is the hollow haydite of the 20-40 object bauxitic clay wrapping up in deposited resin, described weight resin accounts for the 1.5-17.5% of described propping agent weight, the density of this propping agent is 1.2-1.3, cracking pressure is 20-100MPa, circularity 8-10;
Its preparation method comprises the following steps:
1) hollow haydite is made
Adopt bauxitic clay to do raw material, be ground into 200-400 object single-size, add water, Manganse Dioxide, resin agitating become liquid mixture, afterwards described liquid mixture is dried at 500-1000 DEG C of temperature, obtained described hollow haydite after cooling;
2) be 2-6 hour by described hollow haydite sintering time at 900-1500 DEG C;
3) the hollow haydite after above-mentioned sintering is carried out at least 1 resin coated, obtain described propping agent;
Described resin is coated be at every turn by described sintering after hollow haydite resol ethanolic soln at 25-30 DEG C, soak 22-26 hour, the resol ethanolic soln that elimination is unnecessary, afterwards soaked hollow haydite is solidified 2-6 hour at 60-100 DEG C; Then be warming up to 160-200 DEG C and continue solidification 2-6 hour;
The weight ratio of described bauxitic clay, water, Manganse Dioxide and resin is 39:60:0.5:0.5.
2. the method for a kind of propping agent for the preparation of coal-seam gas and shale gas waterfrac treatment as claimed in claim 1, is characterized in that: described hollow haydite particle diameter is 20-40 order.
3. the method for a kind of propping agent for the preparation of coal-seam gas and shale gas waterfrac treatment as claimed in claim 1, is characterized in that: described resin coated for 1-7 resin coated.
4. the method for a kind of propping agent for the preparation of coal-seam gas and shale gas waterfrac treatment as claimed in claim 1, is characterized in that: described resin is coated is that 3 resins are coated.
5. the method for a kind of propping agent for the preparation of coal-seam gas and shale gas waterfrac treatment as claimed in claim 1, is characterized in that: the coated each coated weight of described resin accounts for the 1.5-2.5% of described propping agent weight.
6. the method for a kind of propping agent for the preparation of coal-seam gas and shale gas waterfrac treatment as claimed in claim 1, is characterized in that: the ethanolic soln mass concentration of described resol is 5-25%.
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| US20170145302A1 (en) * | 2014-03-28 | 2017-05-25 | Beijing Rechsand Science & Technology Group Co., Ltd | Self-suspending proppant and preparation and use thereof |
| CN110354970A (en) * | 2018-04-10 | 2019-10-22 | 中国石油天然气股份有限公司 | A kind of processing method of shale gas pressure break river sand proppant |
| CN111073627A (en) * | 2019-12-31 | 2020-04-28 | 西南石油大学 | Lightweight porous proppant, preparation method and application thereof |
| CN113755153A (en) * | 2021-10-25 | 2021-12-07 | 哈尔滨富佳隆科技有限公司 | Preparation method of proppant for carbon sequestration and fracturing fluid by utilizing hazardous wastes |
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