CN111499352B - Method for preparing high-strength oil-gas fracturing propping agent by utilizing ceramsite waste - Google Patents

Method for preparing high-strength oil-gas fracturing propping agent by utilizing ceramsite waste Download PDF

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CN111499352B
CN111499352B CN202010387916.2A CN202010387916A CN111499352B CN 111499352 B CN111499352 B CN 111499352B CN 202010387916 A CN202010387916 A CN 202010387916A CN 111499352 B CN111499352 B CN 111499352B
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powder
ceramic
propping agent
mass
preparing
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CN111499352A (en
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杭天飞
王子雨
崔梦迪
宋彦佩
李宏岐
段运明
陈厚发
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Zhengzhou Xinzheng Meijiu Industrial Co ltd
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Abstract

The invention provides a method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste, which comprises the following steps: crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, graphite powder and magnesium powder, introducing protective gas, firing for 1-2 h at the temperature of 600-fold sand-pack of 700 ℃, heating to the temperature of 950-fold sand-pack of 1100 ℃, firing for 1-2 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, firing the primary ceramic particles at 1150-1210 ℃ for 0.5-1 h, and then continuously heating to 1250-1350 ℃ for firing for 1-2 h. The high-strength oil gas fracturing propping agent is prepared by utilizing the ceramic waste of the heat-insulating plate, so that a new direction is provided for the treatment of construction waste.

Description

Method for preparing high-strength oil-gas fracturing propping agent by utilizing ceramsite waste
Technical Field
The invention relates to a petroleum fracturing propping agent, in particular to a method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste.
Background
When the petroleum and natural gas deep well is exploited, after the high-closure-pressure low-permeability deposit is subjected to fracturing treatment, the petroleum-containing rock stratum is cracked, the petroleum and gas are collected from a channel formed by the cracks, at the moment, the fluid is required to be injected into the rock base layer so as to exceed the pressure of the fracture strength of the stratum, the rock stratum around the shaft is cracked, a channel with high laminar flow capacity is formed, and in order to keep the cracks formed after fracturing open, the petroleum and gas products can smoothly pass through the channel. The petroleum propping agent enters the stratum along with the high-pressure solution and is filled in the cracks of the rock stratum, so that the cracks are supported and are not closed due to stress release, high flow conductivity is kept, oil and gas are smooth, and the yield is increased. The natural petroleum propping agent mainly comprises natural quartz sand, glass balls, metal balls and the like, but has lower strength, and the petroleum fracturing propping agent is prepared by performing ceramic sintering on various raw materials such as high-quality bauxite, coal and the like, so that the strength of the propping agent can be effectively improved, and the natural petroleum propping agent is replaced for underground support of an oil field to increase the yield of petroleum and natural gas.
The insulation board prepared from the foamed ceramics is a closed-pore ceramic material with high porosity and formed by high-temperature calcination, has the characteristics of light weight, small deformation coefficient, ageing resistance, stable performance, good compatibility with an outer wall base layer and a painting layer and the like, is widely popularized and applied domestically, but is crisp in texture and poor in toughness, the insulation board also needs to be updated and replaced along with the continuous progress of the insulation technology, and a large amount of ceramic waste formed by the waste insulation board needs to be treated.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, graphite powder and magnesium powder, introducing protective gas, firing for 1-2 h at the temperature of 600-fold sand-pack of 700 ℃, heating to the temperature of 950-fold sand-pack of 1100 ℃, firing for 1-2 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, firing the primary ceramic particles at 1150-1210 ℃ for 0.5-1 h, and then continuously heating to 1250-1350 ℃ for firing for 1-2 h.
Based on the above, the ceramic waste is mainly derived from waste foamed ceramic insulation boards, and comprises the following components in percentage by mass: SiO 22 50%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0-3.0% and loss on ignition 5.3-7.1%.
Based on the above, the granularity of the ceramic fine powder is less than 200 nm, the granularity of the secondary powder and the tuff is less than 45 μm, and the granularity of the mineralizer, the graphite powder and the magnesium powder is less than 100 nm.
Based on the above, the particle size of the ceramic primary particle is 20-40 meshes, 30-50 meshes or 40-70 meshes.
Based on the above, by mass percent, 65-75% of ceramic fine powder, 6-11% of graphite powder, 6-11% of magnesium powder, 0.2-1.2% of sodium tripolyphosphate, 6-14% of tuff, 0.5-1.5% of mineralizer and 5-13% of water.
Based on the above, the mineralizer is one or a combination of at least two of manganese dioxide, barium carbonate and boric anhydride.
Based on the above, the shielding gas is Ar gas.
Based on the above, the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress. The high-strength oil-gas fracturing propping agent is prepared by using the waste foamed ceramic insulation boards as main materials, so that a new application prospect is provided for the foamed ceramic waste, the recycling of the foamed ceramic waste is promoted, and the environment is protected. Further, firstly, crushing the ceramic waste, then adding graphite powder and magnesium powder, uniformly mixing, and firing at the temperature of 600-plus-700 ℃ and 950-plus-1100 ℃ under the protection of Ar gas to enable magnesium, graphite and partial silicon dioxide to react to form magnesium oxide and silicon carbide, so that the ceramic hardness is ensured, the toughening effect is achieved, the breakage rate is reduced, and the magnesium oxide can be used as a binder in the subsequent steps; in addition, a certain amount of tuff and sodium tripolyphosphate are added, the tuff is loose and porous, and the sodium tripolyphosphate is decomposed, so that gas is volatilized in the firing process, the density of the product can be reduced to a certain extent, and the effects of high strength and low density are achieved; meanwhile, a small amount of corundum is added into the ceramic fine powder by adopting corundum ball milling, so that alumina in other crystal forms is promoted to be converted towards the corundum in the subsequent sintering process, and the product strength is improved.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
A method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, graphite powder and magnesium powder, introducing protective gas, firing for 2 h at the temperature of 600-fold sand-pack type 700 ℃, heating to the temperature of 950-fold sand-pack type 1100 ℃, firing for 1 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and a mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, preheating, firing the primary ceramic particles at 1150-class and 1210-class temperatures for 0.5 h, and then continuously heating to 1250-class and 1350-class temperatures for firing for 1 h. The formula comprises the following raw materials in percentage by mass: 70% of ceramic fine powder, 6% to 11% of graphite powder, 6% to 11% of magnesium powder, 0.2% to 1.2% of sodium tripolyphosphate, 7% of tuff, 0.5% to 1.5% of mineralizer and 5% of water; the protective gas is Ar gas.
Specifically, the ceramic waste is mainly derived from waste foamed ceramic insulation boards and comprises the following components in percentage by mass: SiO 22 50%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0% -3.0%, loss on ignition 5.3% -7.1%; the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition; preferably, the granularity of the ceramic fine powder is less than 200 nm, the granularity of the secondary powder and the tuff is less than 45 microns, and the granularity of the mineralizer, the graphite powder and the magnesium powder is less than 100 nm. The granularity of the primary ceramic particles is 20-40 meshes; the mineralizer is manganese dioxide.
Example 2
A method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, graphite powder and magnesium powder, introducing protective gas, firing for 2 h at the temperature of 600-fold sand-pack type 700 ℃, heating to the temperature of 950-fold sand-pack type 1100 ℃, firing for 2 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and a mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, preheating, firing the primary ceramic particles at 1150-plus-1210 ℃ for 1 h, and then continuously heating to 1250-plus-1350 ℃ for firing for 2 h. The formula comprises the following raw materials in percentage by mass: 65% of ceramic fine powder, 6% of graphite powder, 6% of magnesium powder, 0.5% of sodium tripolyphosphate, 9% of tuff, 0.5% of mineralizer and 13% of water; the protective gas is Ar gas.
Specifically, the ceramic waste is mainly derived from waste foamed ceramic insulation boards and comprises the following components in percentage by mass: SiO 22 50%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0% -3.0%, loss on ignition 5.3% -7.1%; the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition; preferably, the granularity of the ceramic fine powder is less than 200 nm, the granularity of the secondary powder and the tuff is less than 45 microns, and the granularity of the mineralizer, the graphite powder and the magnesium powder is less than 100 nm. The granularity of the primary ceramic particles is 30-50 meshes; the mineralizer is barium carbonate.
Example 3
A method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, the graphite powder and the magnesium powder, introducing protective gas, firing for 1.2 h at the temperature of 600-fold sand-pack 700 ℃, heating to the temperature of 950-fold sand-pack 1100 ℃, firing for 1.8 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, preheating, firing the primary ceramic particles at 1150-class and 1210-class temperatures for 0.8 h, and then continuously heating to 1250-class and 1350-class temperatures for firing for 1.5 h. The formula comprises the following raw materials in percentage by mass: 75% of ceramic fine powder, 6% of graphite powder, 6% of magnesium powder, 0.2% of sodium tripolyphosphate, 6% of tuff, 0.8% of mineralizer and 6% of water; the protective gas is Ar gas.
Specifically, the ceramic waste is mainly derived from waste foamed ceramic insulation boards and comprises the following components in percentage by mass: SiO 22 50%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0% -3.0%, loss on ignition 5.3% -7.1%; the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition; preferably, the granularity of the ceramic fine powder is less than 200 nm, and the secondary powder and the tuff are granulesThe degree is less than 45 mu m, and the particle sizes of the mineralizer, the graphite powder and the magnesium powder are less than 100 nm. The granularity of the primary ceramic particles is 40-70 meshes; the mineralizer is boric anhydride.
Example 4
A method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, the graphite powder and the magnesium powder, introducing protective gas, firing for 1.5 h at the temperature of 600-fold sand-pack 700 ℃, heating to the temperature of 950-fold sand-pack 1100 ℃, firing for 1.2 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and a mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, preheating, firing the primary ceramic particles at 1150-1210 ℃ for 0.5 h, and then continuously heating to 1250-1350 ℃ for firing for 2 h. The formula comprises the following raw materials in percentage by mass: 68% of ceramic fine powder, 10.1% of graphite powder, 10.2% of magnesium powder, 0.2% of sodium tripolyphosphate, 6% of tuff, 0.5% of mineralizer and 5% of water; the protective gas is Ar gas.
Specifically, the ceramic waste is mainly derived from waste foamed ceramic insulation boards and comprises the following components in percentage by mass: SiO 22 50%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0% -3.0%, loss on ignition 5.3% -7.1%; the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition; preferably, the granularity of the ceramic fine powder is less than 200 nm, the granularity of the secondary powder and the tuff is less than 45 microns, and the granularity of the mineralizer, the graphite powder and the magnesium powder is less than 100 nm. The granularity of the primary ceramic particles is 20-40 meshes; the mineralizer is barium carbonate.
Performance detection
The performance of the fracturing propping agent obtained in the embodiment 1-4 is detected by referring to the performance index and evaluation test method of the Q/SY 125-2007 fracturing propping agent, and the detection data show that the oil and gas fracturing propping agent obtained by the invention meets the technical requirement of QSH 0051-2007-fracturing propping agent.
Figure DEST_PATH_IMAGE001
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (9)

1. A method for preparing a high-strength oil-gas fracturing propping agent by utilizing ceramsite waste comprises the following steps:
crushing the ceramic waste to obtain ceramic fine powder; uniformly mixing the ceramic fine powder, graphite powder and magnesium powder, introducing protective gas, firing for 1-2 h at the temperature of 600-fold sand-pack of 700 ℃, heating to the temperature of 950-fold sand-pack of 1100 ℃, firing for 1-2 h, cooling, taking out, and crushing again to obtain secondary powder; mixing the secondary powder with sodium tripolyphosphate, tuff and mineralizer, spraying, mixing, granulating and polishing to obtain primary ceramic particles, introducing protective gas, firing the primary ceramic particles at 1150-1210 ℃ for 0.5-1 h, and then continuously heating to 1250-1350 ℃ for firing for 1-2 h.
2. The method for preparing the high-strength oil and gas fracturing propping agent by utilizing the ceramsite waste material as claimed in claim 1, wherein the ceramic waste material is mainly derived from waste foamed ceramic insulation boards and comprises the following components in percentage by mass: SiO 2250%-70%，Al2O3 10%-20%，Fe2O3 3.0%-5.0%，TiO2 1.0%-2.0%，MgO 1.0%-3.0%，Na2O 2.0%-5.0%，K2O 2.0%-5.0%，Li2O 1.0%-2.0%，CaO 1.0%-3.0%，CaSiO31.0-3.0% and loss on ignition 5.3-7.1%.
3. The method for preparing high-strength oil and gas fracturing propping agent by using ceramsite waste material according to claim 1, wherein the granularity of said ceramic fine powder is less than 200 nm, the granularity of said secondary powder and said tuff is less than 45 μm, and the granularity of said mineralizer, said graphite powder and said magnesium powder is less than 100 nm.
4. The method for preparing the high-strength oil and gas fracturing propping agent by using the ceramsite waste material as recited in claim 1, wherein the particle size of the ceramic primary particles is 20-40 meshes, 30-50 meshes or 40-70 meshes.
5. The method for preparing the high-strength oil-gas fracturing propping agent by utilizing the ceramsite waste material as claimed in claim 1, wherein the ceramic fine powder comprises 65-75% by mass, 6-11% by mass of graphite powder, 6-11% by mass of magnesium powder, 0.2-1.2% by mass of sodium tripolyphosphate, 6-14% by mass of tuff, 0.5-1.5% by mass of a mineralizer, and 5-13% by mass of water.
6. The method for preparing the high-strength oil and gas fracturing propping agent by using the ceramsite waste material as recited in claim 1, wherein the mineralizer is one or a combination of at least two of manganese dioxide, barium carbonate and boric anhydride.
7. The method for preparing the high-strength oil and gas fracturing proppant from the ceramsite waste material according to claim 1, wherein the protective gas is Ar gas.
8. The method for preparing the high-strength oil and gas fracturing propping agent by utilizing the ceramsite waste material as claimed in claim 1, wherein the tuff comprises the following components in percentage by mass: SiO 22 72%-74%，Al2O3 15%-18%， Na2O 1.5%-2.0%，K2O 7.0%-9.0%，Fe2O3Less than 0.20 percent, less than 0.5 percent of CaO, less than 0.3 percent of MgO, and less than 2.5 percent of loss on ignition.
9. The method for preparing the high-strength oil-gas fracturing propping agent by utilizing the ceramsite waste material as recited in claim 1, wherein corundum is used for ball milling in the process of crushing the ceramic fine powder.
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