CN110982509A - High-temperature self-curing proppant and preparation method thereof - Google Patents
High-temperature self-curing proppant and preparation method thereof Download PDFInfo
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- CN110982509A CN110982509A CN201911017850.1A CN201911017850A CN110982509A CN 110982509 A CN110982509 A CN 110982509A CN 201911017850 A CN201911017850 A CN 201911017850A CN 110982509 A CN110982509 A CN 110982509A
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- proppant
- aggregate
- curing
- temperature
- epoxy resin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
Abstract
The invention discloses a high-temperature self-curing proppant which comprises the following components in percentage by mass: 3-5: 0.18 to 0.24: 2-3: 100 of epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate. The aggregate is coated with the film twice, the inner layer is an epoxy resin layer, the outer layer is a phenolic resin layer, the aggregate can be self-solidified into blocks under certain temperature and pressure, the strength is certain, the backflow can be prevented, and the preparation method is simple.
Description
Technical Field
The invention belongs to the technical field of petroleum fracturing, and particularly relates to a high-temperature self-curing proppant and a preparation method thereof.
Background
The petroleum proppant is also called petroleum fracturing proppant. 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 proppant is generally natural sand or artificial high-strength ceramic particles having a certain particle size and grading. The ceramic proppant (ceramic proppant) is prepared by using bauxite as a raw material and performing powder granulation and sintering, has the characteristics of high temperature resistance, high pressure resistance, corrosion resistance, high strength, high flow conductivity, low density, low breakage rate and the like, and is most widely used. But the loose type flow guide pipe is loose, has no adhesive force between surfaces, is periodically influenced by pressure difference in the stratum and is easy to return and spit, thereby influencing the flow guide capacity.
Disclosure of Invention
The invention aims to provide a high-temperature self-curing proppant, which solves the problems of backflow and migration of the conventional proppant.
The technical scheme adopted by the invention is that the high-temperature self-curing proppant comprises the following components in percentage by mass: 3-5: 0.18 to 0.24: 2-3: 100 of epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate.
The present invention is also characterized in that,
the curing agent is one of urotropine, paraformaldehyde and hexamethylenetetramine.
The dispersant is one of calcium stearate, magnesium stearate and polyethylene glycol.
The aggregate is one of quartz sand and ceramsite.
The invention adopts another technical scheme that a preparation method of the high-temperature self-curing proppant comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 2-4: 3-5: 0.18 to 0.24: 2-3, weighing epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate for later use at a ratio of 100: 100;
step 2, placing the aggregate weighed in the step 1 into an oven for heating, and pouring the heated aggregate into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 180-200 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 90-100 ℃, adding a dispersing agent, and stopping after uniform stirring to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
The present invention is also characterized in that,
in the step 2, the heating temperature is 250-280 ℃.
The high-temperature self-curing proppant disclosed by the invention has the beneficial effects that the aggregate is coated with the film twice, the inner layer is an epoxy resin layer, the outer layer is a phenolic resin layer, the proppant can be self-cured into blocks at a certain temperature and under a certain pressure, has a certain strength, can prevent backflow, and is simple in preparation method.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a high-temperature self-curing proppant which comprises the following components in percentage by mass: 3-5: 0.18 to 0.24: 2-3: 100 of epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate;
wherein the curing agent is one of urotropine, paraformaldehyde and hexamethylenetetramine; the dispersing agent is one of calcium stearate, magnesium stearate and polyethylene glycol; the aggregate is one of quartz sand and ceramsite.
The invention relates to a preparation method of a high-temperature self-curing proppant, which comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 2-4: 3-5: 0.18 to 0.24: 2-3, weighing epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate for later use at a ratio of 100: 100;
step 2, placing the aggregate weighed in the step 1 into an oven, heating to 250-280 ℃, and pouring into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 180-200 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 90-100 ℃, adding a dispersing agent, and stopping after uniform stirring to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
Example 1
The invention provides a high-temperature self-curing proppant which comprises the following components in percentage by mass: 3: 0.18: 2, 100 parts of epoxy resin, phenolic resin, urotropine, calcium stearate and quartz sand;
the invention provides a preparation method of a high-temperature self-curing proppant, which comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 2: 3: 0.18: 2, weighing 100 parts of epoxy resin, phenolic resin, urotropine, calcium stearate and quartz sand for later use;
step 2, putting the aggregate weighed in the step 1 into an oven, heating to 250 ℃, and pouring into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 180 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 90 ℃, adding a dispersing agent, and stopping stirring after the mixture is uniformly stirred to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
Example 2
The invention relates to a high-temperature self-curing proppant which comprises the following components in percentage by mass: 5: 0.24: 3:100 of epoxy resin, phenolic resin, paraformaldehyde, magnesium stearate and quartz sand;
the invention relates to a preparation method of a high-temperature self-curing proppant, which comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 4: 5: 0.24: 3:100 parts of epoxy resin, phenolic resin, paraformaldehyde, magnesium stearate and quartz sand for later use;
step 2, putting the aggregate weighed in the step 1 into an oven, heating to 280 ℃, and pouring into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 200 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 100 ℃, adding a dispersing agent, and stopping stirring after the mixture is uniformly stirred to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
Example 3
The invention relates to a high-temperature self-curing proppant which comprises the following components in percentage by mass: 4: 0.21: 2.5: 100 of epoxy resin, phenolic resin, hexamethylenetetramine, polyethylene glycol and ceramsite;
the invention relates to a preparation method of a high-temperature self-curing proppant, which comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 3: 4: 0.21: 2.5: 100 parts of epoxy resin, phenolic resin, hexamethylenetetramine, polyethylene glycol and ceramsite for later use;
step 2, putting the aggregate weighed in the step 1 into an oven, heating to 265 ℃, and pouring into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 190 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 95 ℃, adding a dispersing agent, and stopping stirring after the mixture is uniformly stirred to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
Example 4
The invention relates to a high-temperature self-curing proppant which comprises the following components in percentage by mass: 4: 0.22: 2.5: 100 of epoxy resin, phenolic resin, urotropine, calcium stearate and ceramsite;
the invention relates to a preparation method of a high-temperature self-curing proppant, which comprises the following specific steps:
step 1, mixing the following components in a mass ratio of 4: 4: 0.22: 2.5: 100 parts of epoxy resin, phenolic resin, urotropine, calcium stearate and ceramsite for later use;
step 2, putting the aggregate weighed in the step 1 into an oven, heating to 280 ℃, and pouring into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 180 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 90 ℃, adding a dispersing agent, and stopping stirring after the mixture is uniformly stirred to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
The test method comprises the following steps: according to the method for testing the fracture rate in the method for testing the performance of the proppant for the hydraulic fracturing and gravel packing operations under the trade mark SY-T5108-2014, the difference is that water is added into a sample filled into a crushing chamber, the sample is pressed for 10s under 28MPa by using a press, the pressed sample is placed into an oven to be dried for 6h under 90 ℃, the sample is taken out to observe the integrity of the solidified blocks and test the pressure resistance (the sample is pressurized until the cracks are generated in the blocks and the samples are broken, the maximum pressure is recorded, and the solidification strength is obtained), and the specific results are detailed in Table 1.
TABLE 1 consolidation Strength
As can be seen from the above table, the aggregate is ceramsite, which has higher consolidation strength than quartz sand, and the aggregate can be consolidated into blocks.
According to the high-temperature self-curing proppant disclosed by the invention, the aggregate is coated with the film twice, the inner layer is the epoxy resin layer, the outer layer is the phenolic resin layer, the high-temperature self-curing proppant can be self-cured into blocks at a certain temperature and under a certain pressure, has a certain strength and can prevent backflow, even if the internal aggregate is crushed, the coating layer does not migrate due to the coating layer, and the coating layer has a certain flexibility, so that the contact stress among particles is reduced, and the crushing rate is reduced.
Claims (6)
1. The high-temperature self-curing proppant is characterized by comprising epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate in a mass ratio of 2-4: 3-5: 0.18-0.24: 2-3: 100.
2. The high-temperature self-curing proppant as set forth in claim 1, wherein the curing agent is one of urotropin, paraformaldehyde and hexamethylenetetramine.
3. The high-temperature self-setting proppant as claimed in claim 1, wherein the dispersant is one of calcium stearate, magnesium stearate and polyethylene glycol.
4. The high-temperature self-curing proppant as set forth in claim 1, wherein the aggregate is one of quartz sand and ceramsite.
5. The preparation method of the high-temperature self-curing proppant as claimed in any one of claims 1 to 4, which is characterized by comprising the following specific steps:
step 1, weighing epoxy resin, phenolic resin, a curing agent, a dispersing agent and aggregate according to a mass ratio of 2-4: 3-5: 0.18-0.24: 2-3: 100 for later use;
step 2, placing the aggregate weighed in the step 1 into an oven for heating, and pouring the heated aggregate into a sand mixer;
step 3, stirring the aggregate in the step 2 by a sand mixer, adding epoxy resin for continuous stirring when the temperature is reduced to 180-200 ℃, and coating the epoxy resin on the aggregate;
step 4, adding phenolic resin, uniformly stirring, and then adding a curing agent, and uniformly stirring;
step 5, when the temperature is reduced to 90-100 ℃, adding a dispersing agent, and stopping after uniform stirring to obtain a semi-finished coated proppant;
and 6, sieving the semi-finished coated proppant obtained in the step 5, and removing adhesion and agglomeration to obtain the coated proppant.
6. The method for preparing the high-temperature self-curing proppant as set forth in claim 5, wherein the heating temperature in the step 2 is 250-280 ℃.
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| CN201911017850.1A CN110982509A (en) | 2019-10-24 | 2019-10-24 | High-temperature self-curing proppant and preparation method thereof |
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| CN201911017850.1A CN110982509A (en) | 2019-10-24 | 2019-10-24 | High-temperature self-curing proppant and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718703A (en) * | 2020-07-22 | 2020-09-29 | 青岛大地新能源技术研究院 | Liquid self-supporting high-speed channel fracturing fluid and experimental method |
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| US20040149441A1 (en) * | 2003-01-30 | 2004-08-05 | Nguyen Philip D. | Methods and compositions for preventing fracture proppant flowback |
| CN102660245A (en) * | 2012-03-31 | 2012-09-12 | 北京奇想达科技有限公司 | Pre-coated film propping agent, preparation method of the pre-coated film propping agent and sand prevention method adopting the pre-coated film propping agent |
| CN104357042A (en) * | 2014-10-23 | 2015-02-18 | 亿利资源集团有限公司 | Coated proppant and preparation method thereof |
| CN110079295A (en) * | 2019-04-19 | 2019-08-02 | 北京奇想达新材料有限公司 | Curable proppant and its preparation method and application |
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2019
- 2019-10-24 CN CN201911017850.1A patent/CN110982509A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040149441A1 (en) * | 2003-01-30 | 2004-08-05 | Nguyen Philip D. | Methods and compositions for preventing fracture proppant flowback |
| CN102660245A (en) * | 2012-03-31 | 2012-09-12 | 北京奇想达科技有限公司 | Pre-coated film propping agent, preparation method of the pre-coated film propping agent and sand prevention method adopting the pre-coated film propping agent |
| CN104357042A (en) * | 2014-10-23 | 2015-02-18 | 亿利资源集团有限公司 | Coated proppant and preparation method thereof |
| CN110079295A (en) * | 2019-04-19 | 2019-08-02 | 北京奇想达新材料有限公司 | Curable proppant and its preparation method and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718703A (en) * | 2020-07-22 | 2020-09-29 | 青岛大地新能源技术研究院 | Liquid self-supporting high-speed channel fracturing fluid and experimental method |
| CN111718703B (en) * | 2020-07-22 | 2022-10-14 | 青岛大地新能源技术研究院 | Liquid self-supporting high-speed channel fracturing fluid and experimental method |
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Application publication date: 20200410 |