CN106278174B - A kind of Lightweight ceramsite proppant, preparation and application and shale oil gas recovery method - Google Patents
A kind of Lightweight ceramsite proppant, preparation and application and shale oil gas recovery method Download PDFInfo
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- CN106278174B CN106278174B CN201610586083.6A CN201610586083A CN106278174B CN 106278174 B CN106278174 B CN 106278174B CN 201610586083 A CN201610586083 A CN 201610586083A CN 106278174 B CN106278174 B CN 106278174B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
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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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention provides a kind of Lightweight ceramsite proppant, preparation and application and shale oil gas reservoir exploitation methods.In proppant of the present invention, using coal ash as primary raw material, to reduce the dosage of other ores, and manufacturing cost is reduced；Simultaneously as using low-density coal ash etc. as primary raw material in the present invention, to also further reduced the density of obtained proppant.Proppant of the present invention has many advantages, such as that low in raw material price, obtained ceramsite propping agent density is low, intensity is good, and it can be effective for shale oil gas reservoir exploitation, and the dosage of the related products such as guanidine glue in exploitation reducig, while reducing cost of winning, additionally it is possible to environmental pollution brought by exploitation reducig.
Description
Technical field
The present invention relates to oil-gas mining fields, in particular to a kind of Lightweight ceramsite proppant, preparation and application and page
Shale oil gas recovery method.
Background technique
Hydrofracturing method is also referred to as hydraulic crushing method, is a kind of drilling technology used when exploiting unconventional shale oil gas, main
Wanting target is to enable well production increment.The principle of hydrofracturing method is that a large amount of chemical substances are adulterated water, sand using ground high-pressure pump
Etc. being made fracturing fluid, Reperfu- sion rock depths and pressure break rock export petroleum or natural gas from fine and close rock stratum, thus will
The oil and natural gas resource for being stored in flood tide in shale gas releases.
Currently, hydrofracturing method becomes apparent natural gas well effect of increasing production.Although technique, which has existed, exceedes 60 years,
But recently in the production that the U.S. applies to a big chunk shale oil gas.Shale production technology helps the U.S. to surmount
Saudi Arabia and Russia, and became maximum Oil Producing Countries in the world in 2014.
Cut-off 2015, China's shale gas yield have reached 65 billion cubic meters, but still influence on combustion gas pattern limited.I
State's natural gas is at present or supply falls short of demand, needs to be up to 3000 billion cubic meters to the year two thousand twenty China's natural gas, it is contemplated that 2020
Annual output is up to 2000 billion cubic meters, 1000 billion cubic meter of insufficiency of supply-demand, and external dependence degree is up to 33%.By 2015
Bottom, China's shale gas resource exploration and yield are continuously increased, and in Jiangxi, Sichuan, Chongqing, Henan, yield has been all everywhere respectively
It breaks through, is furthermore found and explored in Guizhou, Hunan, Gansu, Hubei and Anhui, Shanxi.
In the construction for exploiting unconventional shale oil gas using hydrofracturing method, proppant usually can be all used, wherein most often
A kind of proppant is exactly ceramic particle proppant.
Ceramsite propping agent is to pass through ingredient by several ores, be ground into powder, be agglomerated into spherical particles, drying, high temperature burning
A kind of ceramic material made of after specified particle size is sieved is pressed in knot, cooling.Its filler that can be used as oil-gas mining process, and
The service life of the yield of oil gas, flow conductivity, permeability and oil/gas well can be increased.
Ceramsite propping agent is divided into 4 kinds of productions by the height of its bulk density (bulk density) and apparent density (real density)
Product, i.e. high density, middle density, low-density and Ultralight.The density of ceramsite propping agent is lower, in the construction process used pass
Joint product (such as guanidine glue) are fewer, to reduce shale oil gas cost of winning, and reduce chemicals use to produced by environment
Pollution.
Thus, Lightweight ceramsite proppant is just at where the hot spot of research and development.However, in the market although existing product is named as
Light ceramic product, but be mostly that bulk density and apparent density (real density) do not reach requirement actually；Meanwhile in the market
The raw material of existing product formula mostly use the mineral resources such as high-quality bauxite, manganese powder, dolomite, high-quality flint clay, these mines
A large amount of exploitations of stone not only damage ecological environment, but also also further cause oil fracturing since cost of material is excessively high
The cost of support is high.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of Lightweight ceramsite proppant, in the proppant, based on coal ash
Raw material is wanted, to reduce the dosage of other ores, and reduces manufacturing cost, and then solves prior art ceramsite propping agent
The problems such as brought environment and high manufacturing cost are used due to ore raw materials in preparation.Simultaneously as with low in the present invention
Density coal ash etc. is used as primary raw material, to also further reduced the density of obtained proppant, and then also solves oil gas
The problems such as in exploitation as using environmental pollution brought by guanidine glue and high cost.Proppant of the present invention has cost of material low
The advantages that honest and clean, obtained ceramsite propping agent density is low, intensity is good.
The second object of the present invention is to provide the preparation method of Lightweight ceramsite proppant described in one kind, the method
In, by the process of the present invention it is described formula be used as raw material, and by crushings, homogenizing, ingredient, grinding and drying be sintered etc. walk
Rapid preparation Lightweight ceramsite proppant, has many advantages, such as that preparation method is convenient, obtained ceramsite propping agent resistance to pressure is good.
Third object of the present invention is to provide application of the Lightweight ceramsite proppant in shale oil gas reservoir exploitation.
Lightweight ceramsite proppant density of the present invention is low and resistance to pressure is good, can be effective for shale oil gas reservoir exploitation, and exploitation reducig
Middle guanidine glue dosage, while reducing cost of winning, additionally it is possible to environmental pollution brought by exploitation reducig.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of Lightweight ceramsite proppant, according to percent by weight, the proppant is mainly prepared from the following raw materials: kaolinite
Soil 20~50%, ceramic clay 20~45% and coal ash 30~55%.
In the present invention, by using lightweights such as coal ash and cheap raw material, so as to reduce proppant preparation cost
While, additionally it is possible to so that obtained proppant has lower density and preferable intensity, so as to effectively apply
In shale oil gas reservoir exploitation, and reduce the chemical reagent such as added guanidine glue in further recovery process.
Optionally, the present invention in, the proppant is prepared from the following raw materials: kaolin 20~50%, for example, can be but
It is not limited to 22%, 25%, 27%, 30%, 32%, 35%, 37%, 40%, 43%, 45%, 47% etc.；Ceramic clay 20~
45%, such as can be but be not limited to 23%, 25%, 27%, 30%, 32%, 35%, 42% or 43% etc.；And coal ash
30~55%, such as can be but be not limited to 32%, 35%, 37%, 40%, 42%, 45%, 47%, 50% or 53% etc..
Optionally, in the present invention, the density of the proppant is 1.1-1.3g/cm3。
Optionally, in the present invention, according to percent by weight, the proppant is mainly prepared from the following raw materials: kaolin
30~50%, ceramic clay 30~40% and coal ash 30~40%.
In the present invention, by the further adjustment and optimization to each raw material dosage, to advanced optimize institute of the present invention
The performance of proppant is made.
Optionally, in the present invention, according to percent by weight, the proppant is prepared from the following raw materials: kaolin 30~
50%, ceramic clay 30~40% and coal ash 30~40%.
Meanwhile the present invention also provides the preparation method of the Lightweight ceramsite proppant, described method includes following steps:
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to material rate of the present invention, smashed kaolin, ceramic clay and coal ash are weighed respectively, and are mixed equal
Change；
(3) by after the mixed raw material grinding after mixing homogenizing, heavy rotten homogenizing is carried out；
(4) mixed raw material after heavy rotten homogenizing is atomized granulation, then will be dry after particle screening obtained, and carry out table
Then the particle of surface treatment is stored homogenizing by surface treatment；
(5) particle of storage homogenizing is sintered, then cooling homogenizing, and sieved again, and carry out table again after sieving
Surface treatment is to get the Lightweight ceramsite proppant.
In the present invention, by the component in the process of the present invention as raw material, and by ingredient, grinding and drying sintering
And etc. program prepare Lightweight ceramsite proppant of the present invention, thus can be sintered and be prepared with good resistance at a lower temperature
The ceramsite propping agent of pressure property；Meanwhile in the present invention, by the way that multiple homogenization operation is arranged, it is also possible that raw material of the present invention is chemical
Group is grouped as more uniform, can also reduce the internal stress of raw mixture powder, thus increase be granulated after particle viscosity
And compactness, and further increase obtained proppant strength.
In the present invention, appropriate smashed kaolin, ceramic clay and coal ash are weighed described in step (2) respectively to use
Each raw material is measured and is weighed in computer control.
It is described to be prepared as multiple batches of continuous preparation in the present invention；Further, it in the present invention, is mixed described in step (2)
It turns to and is stood after mixing multiple batches of mixed raw material again, then ground.
Corruption of sinking in the present invention, described in step (3) is turned to the homogeneous mixing again of the raw material of grinding, is then allowed to stand laggard
Row homogenizing.
In the present invention, the particle storage turned to after surface treatment is stored described in step (4), and be homogenized.
In the present invention, cooling turn to described in step (5) cools down sintered particle under field conditions (factors), and
Change.
Surface treatment is carried out in the present invention, described in step (5) again to carry out surface burnishing part to sintered particle
Reason.
Optionally, it in the present invention, is ground to repeatedly grind described in step (3)；Preferably, in the present invention, the grinding
For 2,3 or more grindings.
In the present invention, by using the method repeatedly ground, so as to which the partial size of raw mixture is effectively reduced, thus
The adhesiveness of particle after atomization is granulated is improved, and further increases the intensity of obtained proppant.
Optionally, in the present invention, the grinding carries out in the ball mill.
Optionally, in the present invention, atomization granulation described in step (4) is the mixing original after making water fogging and after heavy rotten homogenizing
After material is mixed, agglomerate is pelletized in rotation；
Wherein, the quality grams of water is the 5~20% of the quality grams of the mixed raw material after heavy rotten homogenizing, such as can be
But it is not limited to 6%, 8%, 10%, 12%, 15%, 17% or 19% etc..
In the present invention, by the selection and adjustment to institute's water consumption in atomization steps, so that obtained
Grain has preferable viscosity.
Optionally, in the present invention, the quality grams of the water is the 10 of the quality grams of the mixed raw material after heavy rotten homogenizing
~15%.
In the present invention, by the further adjustment and optimization to institute's water consumption in atomization steps, so as to further mention
The viscosity of particle obtained by height.
Optionally, in the present invention, surface treatment described in step (4) is that resulting particle will carry out surface polishing after drying
Processing.
It in the present invention, is processed by shot blasting by the semi-finished product haydite that will be dried, so as to remove the attachment of haydite surface
Powdered granule reduce turbidity so as to increase the spherome surface finish of obtained proppant, increase water conservancy diversion rate.
Optionally, in the present invention, the temperature being sintered under hot conditions described in step (5) is 1000~1500 DEG C, sintering
Time be 0.5~2h；Preferably, in the present invention, the temperature being sintered under hot conditions described in step (5) is 1200~1300
DEG C, the time of sintering is 1~1.5h；Such as the temperature of sintering can be 1230 DEG C, 1250 DEG C, 1270 DEG C or 1290 DEG C etc.；
Such as the time of sintering can be 1.2h, 1.3h or 1.4h etc..
In the present invention, by the way that sintering time and temperature are selected and adjusted, thus can be by semi-finished product proppant particles
While sufficiently sintering, it will not also be destroyed the structure of the ceramsite propping agent particle caused by excess agglomeration or resistance to pressure drops
It is low.
Meanwhile the application the present invention also provides the Lightweight ceramsite proppant in shale oil gas reservoir exploitation.
Lightweight ceramsite proppant density of the present invention is low and resistance to pressure is good, can effective for shale oil gas reservoir exploitation, and
(such as guanidine glue) dosage of related product in exploitation reducig, while reducing cost of winning, additionally it is possible to which exploitation reducig is brought
Environmental pollution.
Further, the present invention also provides a kind of method of shale oil gas reservoir exploitation, the present invention is used in the method
The Lightweight ceramsite proppant.
Compared with prior art, the invention has the benefit that
(1) in the present invention, Lightweight ceramsite proppant raw material is cheap and easy to get, it is possible to reduce the use of ore raw materials, while its
Further sintering preparation can also carry out at a lower temperature, can not only be energy saving, additionally it is possible to reduce preparation cost；Together
When, proppant strength of the present invention is higher but density is lower, can partly suspend in water, be opened so as to greatly reduce using oil gas
The chemical products such as common guanidine glue in adopting, and then while reducing cost of winning, additionally it is possible to reduce the pollution to environment；
(2) in the present invention, by the component in the process of the present invention as raw material, and by ingredient, grinding and drying
Sintering and etc. program prepare Lightweight ceramsite proppant of the present invention, thus can be sintered and prepare at a lower temperature and have well
Resistance to pressure ceramsite propping agent；Meanwhile in the present invention, by being repeatedly homogenized during the preparation process, not only make original of the invention
Expect that chemical constituent composition is more uniform, also reduce the internal stress of raw mixture powder, to increase particle after granulation
Viscosity and compactness, and further increase obtained proppant strength.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is particle after polishing in the embodiment of the present invention；
Fig. 2 is not to be processed by shot blasting particle in comparative example of the present invention.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Embodiment 1
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 25%, ceramic clay 25% and coal ash 50% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment to get particle after polishing shown in Fig. 1, then by surface treatment
Particle storage homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1250 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of embodiment 1.
The Lightweight ceramsite proppant of embodiment 1 can partly suspend in water.In further shale oil gas reservoir exploitation, by
It can partly suspend in water in Lightweight ceramsite proppant of the present invention, so just only being needed in pressure break agent used in synchronous fracturing step
Using minimal amount or without using guanidine glue, this can not only save pressure break agent cost, additionally it is possible to avoid making due to pressure break agent
It is polluted with the environmental system of brought underground water etc..
Embodiment 2
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 35%, ceramic clay 35% and coal ash 30% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment, the particle of surface treatment is then stored into homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1270 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of embodiment 2.
Embodiment 3
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 40%, ceramic clay 30% and coal ash 30% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment, the particle of surface treatment is then stored into homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1260 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of embodiment 3.
Comparative example 1
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 60%, ceramic clay 20% and coal ash 20% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment to get particle after polishing shown in Fig. 1, then by surface treatment
Particle storage homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1280 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of comparative example 1.
Comparative example 2
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 15%, ceramic clay 60% and coal ash 25% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment to get particle after polishing shown in Fig. 1, then by surface treatment
Particle storage homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1260 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of comparative example 2.
Comparative example 3
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 20%, ceramic clay 15% and coal ash 65% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained, and carries out surface polishing treatment to get particle after polishing shown in Fig. 1, then by surface treatment
Particle storage homogenizing；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1240 DEG C, then cooling homogenizing, and sieved again, then
Carry out surface grinding process again to sintered particle to get the Lightweight ceramsite proppant of comparative example 3.
Comparative example 4
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) according to weight percent: kaolin 20%, ceramic clay 30% and coal ash 50% weigh appropriate crushing respectively
Kaolin, ceramic clay and coal ash afterwards, and mix homogenizing；
(3) by the mixed raw material after mixing homogenizing after secondary grinding, heavy rotten homogenizing is carried out；
(4) it is mixed after making water fogging with the mixed raw material after heavy rotten homogenizing, agglomerate is pelletized in rotation, then will system
It is dried after the particle screening obtained to get, without polishing treatment particle, then being stored the particle without polishing treatment equal shown in Fig. 2
Change；
Wherein, the quality grams for being atomized water used is the 15% of the quality grams of the mixed raw material after sinking rotten homogenizing；
(5) particle of storage homogenizing is sintered 1h under the conditions of 1250 DEG C, then cooling homogenizing, and sieve again to get
The Lightweight ceramsite proppant of comparative example 4.
Experimental example 1
Equivalent haydite is weighed from Lightweight ceramsite proppant obtained by embodiment 1-3 and comparative example 1-4 at random respectively,
Line density of going forward side by side and percentage of damage test, as a result as follows:
Lightweight ceramsite proppant obtained by raw material proportioning and preparation method of the present invention have lower bulk density and
Apparent density, while also there is good mechanical strength, it can be suitable for shale oil gas reservoir exploitation.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from of the invention
Many other change and modification can be made in the case where spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (9)
1. a kind of preparation method of Lightweight ceramsite proppant, which is characterized in that described method includes following steps:
(1) appropriate kaolin, ceramic clay and coal ash are taken respectively, and are crushed；
(2) smashed kaolin, ceramic clay and coal ash are weighed respectively, and mix homogenizing；
Wherein, according to mass percent: kaolin 20~50%, ceramic clay 20~45% and coal ash 30~55%；
(3) by after the mixed raw material grinding after mixing homogenizing, heavy rotten homogenizing is carried out；
(4) mixed raw material after heavy rotten homogenizing is atomized granulation, then will be dry after particle screening obtained, and carry out at surface
Then the particle of surface treatment is stored homogenizing by reason；
Wherein, the surface treatment is that resulting particle will carry out surface polishing treatment after drying；
(5) particle of storage homogenizing is sintered, then cooling homogenizing, and sieved again, and carried out at surface again after sieving
Reason is to get the Lightweight ceramsite proppant.
2. the method according to claim 1, wherein in step (2), according to mass percent: kaolin 30~
40%, ceramic clay 30~40% and coal ash 30~40%.
3. the method according to claim 1, wherein being ground to repeatedly grind described in step (3).
4. the method according to claim 1, wherein atomization granulation described in step (4) for after making water fogging with
After mixed raw material after heavy rotten homogenizing is mixed, agglomerate is pelletized in rotation；
Wherein, the quality grams of water is the 5~20% of the quality grams of the mixed raw material after heavy rotten homogenizing.
5. according to the method described in claim 4, it is characterized in that, the quality grams of the water is the mixing original after heavy rotten homogenizing
The 10~15% of the quality grams of material.
6. the method according to claim 1, wherein the temperature of sintering described in step (5) is 1000~1500
DEG C, the time of sintering is 0.5~2h.
7. Lightweight ceramsite proppant prepared by method according to claim 1 to 6.
8. application of the Lightweight ceramsite proppant described in claim 7 in shale oil gas reservoir exploitation.
9. a kind of shale oil gas reservoir exploitation method, which is characterized in that use light ceramic branch described in claim 7 in the method
Support agent.
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| WO2015084195A1 (en) * | 2013-12-05 | 2015-06-11 | Baltic Ceramics S.A. | A method of manufacturing of light ceramic proppants and light ceramic proppants |
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