Anti-backflow fiber proppant for fracturing and preparation method of anti-backflow fiber proppant

Abstract

The invention discloses an anti-backflow fiber proppant for fracturing and a preparation method thereof. The anti-backflow fiber proppant comprises a proppant, a fiber layer composition and a dispersing agent, wherein the weight ratio of the proppant to the fiber layer composition to the dispersing agent is 100: (3-10): (0.1-0.3); the fiber layer composition is composed of epoxy resin, basalt fibers and a curing agent, and the weight ratio of the epoxy resin to the basalt fibers to the curing agent is 100: (30-100): (5-30). The fiber proppant is prepared by solidifying the short-cut basalt fibers on the surface of the proppant, and the cohesion of the proppant is increased and the migration of the proppant is inhibited by utilizing the interpenetrating behavior generated by the basalt short fibers on the surface of the proppant, so that the problems of oil well fracturing flowback and crack sand production in the subsequent production stage are reduced and eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction and fracturing, and in particular to an anti-vomiting fiber proppant for fracturing and a preparation method thereof. Background Art

[0002] In oilfield development, low-permeability fields account for a significant portion of total oil and gas production. Fracturing is a key technology for transforming low-permeability reservoirs. During the fracturing process, proppant is carried into the fractures by the fracturing fluid. Once the fracturing is complete, the proppant in the fractures supports the fractures, preventing them from closing. However, during subsequent production, due to the high-speed scouring and carrying effects of the formation fluid, the proppant in the fractures will undergo varying degrees of migration. The proppant will migrate along the fractures with the formation fluid toward the wellbore. In particular, proppant in fractures near the wellbore will enter the wellbore, with some sinking into the wellbore and some being produced with the formation fluid. Over time, this can damage the wellhead nozzle and cause sand burial at the bottom of the wellbore. Proppant in fractures farther from the wellbore loses support as the proppant migrates, causing the fractures to close. This reduces the flow path for oil and gas in the formation and reduces well production. Proppant backflow is particularly common during the drainage phase.

[0003] Currently, the following methods are primarily used to address proppant backflow in fractured wells: First, fiber is added to the fracturing fluid, a method known as fiber backflow prevention. This involves mixing a relatively flexible fiber material with the sand-carrying fluid and injecting it into the formation. Once dispersed in the fracturing fluid, the fibers interact with each other to form a spatial network structure, stabilizing the proppant in its original position and preventing backflow. This also reduces proppant settling velocity and improves fracture placement.

[0004] For example, the Chinese invention patent with publication number CN104405360A discloses a fracturing method for improving the sand-carrying performance of fracturing fluid. In this method, degradable fibers are dispersed through a dispersion device and then uniformly dissolved in the fracturing fluid base fluid. The added fibers can reduce the sedimentation rate of the proppant, improve the sand-carrying capacity of the fracturing fluid, and effectively prevent the proppant from flowing back. The Chinese invention patent with publication number CN104694113A discloses a method for improving the sand-carrying capacity of fracturing fluid and its fiber-containing fracturing fluid. The invention provides a fracturing fluid containing soluble fibers, which can improve the sand-carrying capacity of the fracturing fluid. The Chinese invention patent with publication number CN108841370A discloses a high-strength fiber fracturing fluid and its preparation method and application. The invention uses fibers with good dispersibility that can be completely degraded under medium and low temperature reservoir temperature conditions to improve the sand suspension of the fracturing fluid. Chinese invention patent publication number CN111961460A discloses a fiber proppant system for fracturing, comprising a fracturing fluid, specialty fibers, and a coated proppant. The specialty fibers are surface-treated conventional fibers selected from degradable fibers such as polyethylene, polypropylene, polyvinyl acetal, polyester, polylactic acid, polyamide, and cellulose. The coated proppant is a conventional proppant coated with a nitrogen-containing silane coupling agent, a crosslinker, a small molecule surfactant, or an oil-soluble low-molecular-weight polymer. The sand-carrying system of this invention achieves efficient suspension of the proppant through interaction between the coated proppant and the specialty fibers. Chinese invention patent publication number CN115873587A discloses a composite chemical anti-backflow additive and a method for preventing proppant backflow. This composite chemical anti-backflow technology involves injecting an epoxy emulsion and degradable fibers in a specific ratio into the formation along with the proppant, and then shutting the well to solidify. After the water-based epoxy resin emulsion enters the formation along with the sand-carrying fluid, it can be adsorbed on the surface of the proppant and degradable fiber. The water-based epoxy resin emulsion contains epoxy resin and curing agent, which undergoes a cross-linking and curing reaction on the surface of the proppant and degradable fiber, bonding the two together to achieve the purpose of preventing backflow.

[0005] The above invention patents use fiber materials of a certain length that can be evenly dispersed in the fracturing fluid. With the help of the three-dimensional network structure formed by the fibers in the fracturing fluid, the proppant particles are distributed within the network structure space, achieving the purpose of inhibiting the migration of proppant particles. In order to form a network structure with a certain strength, the fiber length used is generally above 6mm. Fiber sand control technology is mainly used in the fracturing backflow stage. The backflow process is well designed and can withstand the high-speed backflow of the fracturing fluid in the initial stage. In recent years, fiber sand control technology has mainly used degradable fiber materials. Degradable fibers can basically degrade quickly after the fracturing construction is completed, and the degradation has little damage to the diversion. However, after the fiber degrades, the binding effect on the proppant is weakened, and the sand control effect basically disappears, increasing the risk of sand production in the oil and gas wells in the later stage. Therefore, the fiber fracturing fluid process of the above invention patents does not solve the problem of long-term proppant backflow in oilfield fracturing wells.

[0006] The second is to use a proppant coating method to prevent backflow. Generally, a curable resin is pre-coated on the proppant surface. The resin adsorbed on the proppant surface reacts and solidifies at the formation temperature to form a filterable three-dimensional network of proppant consolidation, thereby reducing proppant backflow. Generally, a tail-chasing resin proppant method is used, that is, it is used as a proppant sealing plug during fracturing construction to seal the crack opening. This method has a good anti-backflow effect and improves the pressure bearing capacity of the proppant. For example, the Chinese invention patent with publication number CN110520501A discloses an anti-backflow proppant. This resin-coated proppant includes proppant matrix particles and a polymer resin coating on the proppant matrix particles. The resin-coated proppant self-adheres to the fracturing crack to form a proppant filling body to prevent proppant backflow. The fracturing tail-chasing consolidation proppant process has the characteristics of long-term anti-backflow, but this process has high requirements for fracturing construction and there are certain construction risks. Once the pre-consolidated proppant solidifies in the wellbore, it will cause the fracturing construction to fail. In addition, the proppant coating anti-spitting technology generally requires a certain resin curing reaction, that is, well shut-in time, and the resin layer will occupy the gaps between the proppants after curing, which reduces the proppant conduction to a certain extent.

[0007] In order to solve the problems of proppant spitting out after oil field fracturing and the resulting proppant sand burial in the wellbore, nozzle damage and crack closure, the present invention has developed an anti-spitting out fiber proppant for fracturing and a preparation method. Without changing the fracturing construction process or the fracturing fluid system formula, the problem of proppant spitting out in the fracturing crack can be solved in a long-term manner. Summary of the Invention

[0008] To address the above-mentioned technical problems, the present invention provides a fiber proppant for fracturing and its preparation method. This invention prevents proppant migration and spitting during the fracturing fluid flowback and production phases after fracturing an oil and gas well, thereby eliminating damage to wellhead equipment caused by proppant spitting, including fracture closure, wellbore sand burial, and sand production from fractures.

[0009] In a first aspect, the present invention provides an anti-spitting fiber proppant for fracturing, which is achieved by adopting the following technical solutions.

[0010] A fiber proppant for fracturing anti-vomiting, comprising a proppant, a fiber layer composition, and a dispersant, wherein the weight ratio of the proppant, the fiber layer composition, and the dispersant is 100:(3-10):(0.1-0.3);

[0011] The fiber layer composition consists of epoxy resin, basalt fiber and curing agent, and the weight ratio of epoxy resin, basalt fiber and curing agent is 100:(30-100):(5-30).

[0012] By adopting the above technical solution, the anti-vomiting fiber proppant composition is composed of a proppant and a fiber layer composition. In the fiber layer composition, the epoxy resin has a consolidation effect and can consolidate the basalt fiber on the surface of the proppant. The basalt fibers firmly bonded to the proppant are intertwined with each other in the fracturing cracks and tend to form a whole in the cracks under the action of crack compaction, which is similar to the mechanical bite of gears, and can effectively reduce the migration problem of the proppant in the cracks.

[0013] Furthermore, the proppant is quartz sand or ceramsite, and the particle size of the proppant is 20-70 mesh.

[0014] Furthermore, the dispersant is selected from one of calcium stearate, magnesium stearate or zinc stearate.

[0015] Furthermore, the basalt fiber is obtained by chopping basalt fiber precursor, with a diameter of 5 μm-20 μm and a length of 0.2 mm-2 mm.

[0016] Furthermore, the epoxy resin is a solid bisphenol A epoxy resin, and the epoxy equivalent of the epoxy resin is 700-1000 g / mol.

[0017] Furthermore, the curing agent is selected from one or a mixture of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, isophoronediamine, 4,4'-diaminodiphenylmethane, and phenalkamine.

[0018] In a second aspect, the present invention provides a method for preparing an anti-spitting fiber proppant for fracturing, which is achieved by adopting the following technical solution.

[0019] A method for preparing the above-mentioned anti-vomiting fiber proppant for fracturing comprises the following steps:

[0020] S1. Heat the proppant to 220-260°C and add epoxy resin under stirring at a stirring speed of 100-150 rpm for 40-60 seconds to evenly coat the epoxy resin on the proppant surface.

[0021] S2. Maintain the stirring speed at 100-150 rpm, add basalt fiber, and stir for 90-120 s to mix the proppant and basalt fiber evenly;

[0022] S3. Maintaining a stirring speed of 100-150 rpm, adding a curing agent, stirring for 120-180 s, the basalt fiber and the proppant are consolidated together;

[0023] S4. Maintain the stirring speed at 100-150rpm, add the dispersant, and stir for 30-60s to completely disperse the proppant particles;

[0024] S5. Cool to room temperature, sieve, and remove unconsolidated basalt fibers to obtain an anti-vomiting fiber proppant.

[0025] Furthermore, in step S5, the aperture of the screen used is the minimum particle size of the proppant.

[0026] This application has the following beneficial effects.

[0027] (1) The fiber material of the anti-vomiting fiber proppant of the present invention is chopped basalt fiber filaments, which are firmly bonded to the proppant through cured epoxy resin. Compared with the degradable organic fiber materials commonly used in fiber fracturing fluids in current oilfield fracturing operations, basalt fiber is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide and titanium dioxide, and is an inorganic mineral fiber with high strength (tensile strength of about 4000 MPa), good chemical stability and corrosion resistance, and high temperature resistance (700°C). The above properties can ensure that the anti-vomiting fiber proppant of the present invention does not degrade under high temperature and high pressure conditions in the formation, maintaining the long-term effectiveness of the proppant in preventing vomiting.

[0028] (2) The basalt fiber used in the anti-vomiting fiber proppant of the present invention has natural silicate compatibility, and is close to the chemical composition (aluminum oxide, silicon oxide, silicate, etc.) of oilfield proppant (ceramsite, quartz sand), with a density (2.5g / cm 3 -2.8g / cm 3 ) is close to that of organic fibers. When preparing basalt fiber proppants, basalt fibers and proppants can be mixed evenly, and the preparation process is easy to implement.

[0029] (3) The basalt fibers used in the anti-vomiting fiber proppant of the present invention are consolidated with the proppant through resin, which prevents the fiber materials from migrating and aggregating with the formation fluid, thereby preventing the proppant channel from being blocked and the fracture permeability from being reduced.

[0030] (4) The basalt fibers used in the anti-vomiting fiber proppant of the present invention are chopped fibers with a length of less than 2 mm. Compared with the 10 mm to 20 mm chopped fibers commonly used in current fiber fracturing fluids, although the shorter fibers cannot form a three-dimensional network structure in underground fractures, the shorter fibers have a smaller impact on fracturing construction and post-fracture fracture permeability.

[0031] (5) The anti-vomiting mechanism of the anti-vomiting fiber proppant of the present invention is that, firstly, after the basalt short fibers are consolidated on the proppant surface, the friction coefficient between the fiber proppant and the fiber proppant and the fracture wall increases significantly, effectively increasing the proppant migration resistance, improving the sand control effect of the fiber proppant, and making it less likely for the proppant to return during fracturing fluid flowback and post-fracturing production; secondly, the basalt short fibers consolidated on the proppant surface partially interpenetrate on the contact surface, thereby increasing the cohesive force of the proppant and inhibiting the migration of the proppant. Compared with ordinary proppant, the anti-vomiting fiber proppant of the present invention has a reduced ability to migrate in fractures, and compared with ordinary proppant of the same particle size, the critical sand flow rate of the proppant is greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a photo of the raw material ceramsite under a microscope of the present invention;

[0033] Figure 2 This is a photo of a single anti-vomiting proppant obtained in Example 3 of the present invention under a microscope;

[0034] Figure 3 This is a photo of a plurality of anti-vomiting proppant aggregates obtained in Example 3 of the present invention under a microscope. DETAILED DESCRIPTION

[0035] The present patent application is further described below with reference to the embodiments.

[0036] The materials used in the preparation processes of the following examples were not further processed unless otherwise specified and were purchased from commercial sources.

[0037] The relevant information of the instruments and drugs involved in the following embodiments of the present invention is as follows:

[0038] Ceramic granules, specification 20 / 40 mesh, Henan Tianxiang New Materials Co., Ltd.;

[0039] Basalt fiber, diameter 12 μm, length 0.5 mm, 1 mm, 2 mm, Guizhou Shixin Basalt Technology Co., Ltd.;

[0040] Epoxy resin, model CYD-013, Sinopec Baling Petrochemical Co., Ltd.;

[0041] Curing agent, model TZ550, Henan Tianze Industrial Co., Ltd.;

[0042] Calcium stearate, fineness passing 0.075 mm sieve, Jiangxi Hongyuan Chemical Co., Ltd.;

[0043] Microscope, model V1600, Micro-Instrument Optoelectronics (Tianjin) Company;

[0044] Sand mixer, model SHY, Jining Tongchuang Machinery Co., Ltd.

[0045] Vibrating screen, model, RL200, Henan Rencongzhong Machinery Manufacturing Co., Ltd.;

[0046] Flow diversion instrument, model, FCS842, American Core Company.

[0047] Example 1

[0048] A fiber proppant for fracturing to prevent vomiting, comprising the following components: 1000g of ceramsite, 80g of a fiber layer composition, and 2g of a dispersant;

[0049] The fiber layer composition consists of the following ingredients: 32g of basalt fiber with a length of 0.5mm, 40g of epoxy resin, and 8g of curing agent.

[0050] The preparation method of the above anti-vomiting proppant comprises the following steps:

[0051] 1) heating the proppant to 250° C., adding epoxy resin while stirring at a speed of 150 rpm for 50 seconds, and uniformly coating the epoxy resin on the surface of the proppant; 2) adding basalt fiber while maintaining the stirring speed at 150 rpm for 100 seconds, and uniformly mixing the proppant and basalt fiber; 3) adding a curing agent while maintaining the stirring speed at 150 rpm for 150 seconds, and consolidating the basalt fiber and the proppant together; 4) adding a dispersant while maintaining the stirring speed at 150 rpm for 30 seconds, and completely dispersing the proppant particles; 5) cooling to room temperature, passing through a vibrating sieve with a sieve aperture of 40 mesh, and sieving out unconsolidated basalt fiber to obtain the anti-vomiting fiber proppant.

[0052] Example 2

[0053] A fiber proppant for fracturing to prevent vomiting, comprising the following components: 1000g of ceramsite, 80g of a fiber layer composition, and 2g of a dispersant;

[0054] The fiber layer composition consists of the following ingredients: 32g of basalt fiber with a length of 1mm, 40g of epoxy resin, and 8g of curing agent.

[0055] The preparation method of the above anti-vomiting proppant comprises the following steps:

[0056] 1) heating the proppant to 250° C., adding epoxy resin while stirring at a speed of 150 rpm for 50 seconds, and uniformly coating the epoxy resin on the surface of the proppant; 2) adding basalt fiber while maintaining the stirring speed at 150 rpm for 100 seconds, and uniformly mixing the proppant and basalt fiber; 3) adding a curing agent while maintaining the stirring speed at 150 rpm for 150 seconds, and consolidating the basalt fiber and the proppant together; 4) adding a dispersant while maintaining the stirring speed at 150 rpm for 30 seconds, and completely dispersing the proppant particles; 5) cooling to room temperature, passing through a vibrating sieve with a sieve aperture of 40 mesh, and sieving out unconsolidated basalt fiber to obtain the anti-vomiting fiber proppant.

[0057] Example 3

[0058] A fiber proppant for fracturing to prevent vomiting, comprising the following components: 1000g of ceramsite, 80g of a fiber layer composition, and 2g of a dispersant;

[0059] The fiber layer composition consists of the following ingredients: 32g of basalt fiber with a length of 2mm, 40g of epoxy resin, and 8g of curing agent.

[0060] The method for preparing the anti-vomiting proppant described above comprises the following steps:

[0061] 1) heating the proppant to 250° C., adding epoxy resin while stirring at a speed of 150 rpm for 50 seconds, and uniformly coating the epoxy resin on the surface of the proppant; 2) adding basalt fiber while maintaining the stirring speed at 150 rpm for 100 seconds, and uniformly mixing the proppant and basalt fiber; 3) adding a curing agent while maintaining the stirring speed at 150 rpm for 150 seconds, and consolidating the basalt fiber and the proppant together; 4) adding a dispersant while maintaining the stirring speed at 150 rpm for 30 seconds, and completely dispersing the proppant particles; 5) cooling to room temperature, passing through a vibrating sieve with a sieve aperture of 40 mesh, and sieving out unconsolidated basalt fiber to obtain the anti-vomiting fiber proppant.

[0062] Example 4

[0063] A fiber proppant for fracturing to prevent vomiting, comprising the following components: 1000g of ceramsite, 30g of fiber layer composition, and 2g of dispersant;

[0064] The fiber layer composition consists of the following ingredients: 12g of basalt fiber with a length of 0.5mm, 15g of epoxy resin, and 3g of curing agent.

[0065] The method for preparing the anti-vomiting proppant composition described above comprises the following steps:

[0066] 1) heating the proppant to 250° C., adding epoxy resin while stirring at a speed of 150 rpm for 50 seconds, and uniformly coating the epoxy resin on the surface of the proppant; 2) adding basalt fiber while maintaining the stirring speed at 150 rpm for 100 seconds, and uniformly mixing the proppant and basalt fiber; 3) adding a curing agent while maintaining the stirring speed at 150 rpm for 150 seconds, and consolidating the basalt fiber and the proppant together; 4) adding a dispersant while maintaining the stirring speed at 150 rpm for 30 seconds, and completely dispersing the proppant particles; 5) cooling to room temperature, passing through a vibrating sieve with a sieve aperture of 40 mesh, and sieving out unconsolidated basalt fiber to obtain the anti-vomiting fiber proppant.

[0067] Example 5

[0068] A fiber proppant for fracturing to prevent vomiting, comprising the following components: 1000g of ceramsite, 50g of fiber layer composition, and 2g of dispersant;

[0069] The fiber layer composition consists of the following ingredients: 20 g of basalt fiber with a length of 0.5 mm, 25 g of epoxy resin, and 5 g of curing agent.

[0070] The method for preparing the anti-vomiting proppant composition described above comprises the following steps:

[0071] 1) heating the proppant to 250° C., adding epoxy resin while stirring at a speed of 150 rpm for 50 seconds, and uniformly coating the epoxy resin on the surface of the proppant; 2) adding basalt fiber while maintaining the stirring speed at 150 rpm for 100 seconds, and uniformly mixing the proppant and basalt fiber; 3) adding a curing agent while maintaining the stirring speed at 150 rpm for 150 seconds, and consolidating the basalt fiber and the proppant together; 4) adding a dispersant while maintaining the stirring speed at 150 rpm for 30 seconds, and completely dispersing the proppant particles; 5) cooling to room temperature, passing through a vibrating sieve with a sieve aperture of 40 mesh, and sieving out unconsolidated basalt fiber to obtain the anti-vomiting fiber proppant.

[0072] The morphology of single particles and aggregated particles of the raw ceramsite and the anti-vomiting proppant sample obtained in Example 3 were observed using a microscope. The results were as follows: Figure 1 As shown in Figures 2 and 3. By comparison Figure 2Single anti-spitting proppant and Figure 3 It can be seen from the aggregation state of multiple anti-spitting proppants that Figure 2 The surface of a single anti-vomiting proppant is bonded with multiple basalt short fibers in a random stacking state; Figure 3 Multiple anti-spitting proppants are gathered together to form a cross-hook network structure, which increases the stability of the proppant filling layer.

[0073] Performance testing

[0074] Test sample: the anti-vomiting proppant prepared in Example 1-5;

[0075] Control sample: the raw material ceramsite used in the examples;

[0076] Test content: The critical sand flow rate and fracture conductivity of the raw material ceramsite and the anti-vomiting proppant prepared in Examples 1-5 were tested to evaluate and illustrate the sand stabilization performance of the anti-vomiting proppant and the degree of influence of the anti-vomiting proppant on the fracture seepage performance.

[0077] Test method:

[0078] The critical sand flow rate test of proppant is to place proppant between the plates of the diversion chamber of the fracture diversion instrument to form an artificial fracture of a certain thickness. Then, after slowly applying pressure on the plates, the artificial fracture is flushed with clean water, and the displacement flow rate is gradually increased from low to high. The displacement flow rate when the proppant is produced in the artificial fracture is the critical sand flow rate of the proppant. The fracture closure pressure is 0.1MPa and 1MPa to simulate the gradual closing process of the proppant fracture. The sand concentration is designed to be 10kg / m 2 .

[0079] The fracture conductivity test uses the FCS842 fracture diversion instrument to simulate the fracture closure pressure under 30MPa and 30MPa conditions. The diversion chamber is designed according to API standards, and the sand concentration is designed to be 10kg / m 2 .

[0080] The test results are shown in Table 1 below.

[0081] Table 1 Performance test results of anti-vomiting proppant samples

[0082]

[0083] As shown in Table 1, the critical sand flow rate of the anti-vomiting proppant samples of Examples 1-5 of the present invention is increased by 15-25 times compared to the blank ceramsite sample, indicating that the interpenetrating structure formed between the basalt short fibers on the surface of the anti-vomiting proppant of the present invention increases the cohesion of the proppant and inhibits the migration of the proppant within the fracture. At the same time, by comparison with the ceramsite sample, the fracture conductivity of the anti-vomiting proppant of the present invention is reduced by less than 10%, thereby ensuring the fracture seepage performance of the anti-vomiting proppant. In summary, the anti-vomiting proppant of the present invention can effectively solve the migration and vomiting problems of fracturing proppant in the early stage of fracture closure and during the production process of fracturing wells.

[0084] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fiber proppant for fracturing with an anti-vomiting function, characterized in that: The invention comprises a proppant, a fiber layer composition and a dispersant, wherein the weight ratio of the proppant, the fiber layer composition and the dispersant is 100:(3-10):(0.1-0.3); The fiber layer composition consists of epoxy resin, basalt fiber and curing agent, and the weight ratio of epoxy resin, basalt fiber and curing agent is 100:(30-100):(5-30).

2. The anti-vomiting fiber proppant for fracturing according to claim 1, characterized in that: The proppant is quartz sand or ceramsite, and the particle size of the proppant is 20-70 meshes.

3. The anti-vomiting fiber proppant for fracturing according to claim 1, characterized in that: The dispersant is selected from one of calcium stearate, magnesium stearate or zinc stearate.

4. The anti-vomiting fiber proppant for fracturing according to claim 1, characterized in that: The basalt fiber is obtained by chopping basalt fiber precursor, and has a diameter of 5 μm-20 μm and a length of 0.2 mm-2 mm.

5. The anti-vomiting fiber proppant for fracturing according to claim 1, characterized in that: The epoxy resin is a solid bisphenol A epoxy resin, and the epoxy equivalent of the epoxy resin is 700-1000 g / mol.

6. The anti-vomiting fiber proppant for fracturing according to claim 1, characterized in that: The curing agent is selected from one or a mixture of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, isophoronediamine, 4,4'-diaminodiphenylmethane, and phenalkamine.

7. A method for preparing the anti-vomiting fiber proppant for fracturing according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Heat the proppant to 220-260°C and add epoxy resin under stirring at a stirring speed of 100-150 rpm for 40-60 seconds to evenly coat the epoxy resin on the proppant surface. S2. Maintain the stirring speed at 100-150 rpm, add basalt fiber, and stir for 90-120 s to mix the proppant and basalt fiber evenly; S3. Maintaining a stirring speed of 100-150 rpm, adding a curing agent, stirring for 120-180 s, the basalt fiber and the proppant are consolidated together; S4. Maintain the stirring speed at 100-150rpm, add the dispersant, and stir for 30-60s to completely disperse the proppant particles; S5. Cool to room temperature, sieve, and remove unconsolidated basalt fibers to obtain an anti-vomiting fiber proppant.

8. The method for preparing an anti-vomiting fiber proppant for fracturing according to claim 7, characterized in that: In step S5, the pore size of the screen used is the minimum particle size of the proppant.

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