CN114380976A - Sustained-release fluorescent tracing tectorial membrane proppant for oil field and preparation method and application thereof - Google Patents
Sustained-release fluorescent tracing tectorial membrane proppant for oil field and preparation method and application thereof Download PDFInfo
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- 210000002489 tectorial membrane Anatomy 0.000 title claims abstract description 34
- 238000013268 sustained release Methods 0.000 title claims abstract description 25
- 239000012730 sustained-release form Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000001491 aromatic compounds Chemical class 0.000 claims abstract description 15
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 24
- KVHHMYZBFBSVDI-UHFFFAOYSA-N 8-aminonaphthalen-2-ol Chemical compound C1=C(O)C=C2C(N)=CC=CC2=C1 KVHHMYZBFBSVDI-UHFFFAOYSA-N 0.000 claims description 20
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 10
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical group O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 10
- 238000010030 laminating Methods 0.000 claims description 8
- SYUYTOYKQOAVDW-UHFFFAOYSA-N 2-nitrosonaphthalen-1-ol Chemical compound C1=CC=C2C(O)=C(N=O)C=CC2=C1 SYUYTOYKQOAVDW-UHFFFAOYSA-N 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical group COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 3
- ORDKAWZEDYAZMM-UHFFFAOYSA-N 7-hydroxynaphthalene-2-sulfonic acid;sodium Chemical compound [Na].C1=CC(S(O)(=O)=O)=CC2=CC(O)=CC=C21 ORDKAWZEDYAZMM-UHFFFAOYSA-N 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3271—Hydroxyamines
- C08G18/3278—Hydroxyamines containing at least three hydroxy groups
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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Abstract
The invention discloses a sustained-release fluorescent tracing tectorial membrane proppant for an oil field, a preparation method and application thereof, belongs to the technical field of oil field drilling, and solves the technical problems of large tracer dosage, short monitoring time, low sensitivity and the like in the prior art. The slow-release fluorescent tracing coated proppant for the oil field is prepared by mixing diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens in a solvent for reaction, and the preparation method is simple to operate, economic and environment-friendly. The functional type tectorial membrane proppant for tracer that oil field used slowly-releasing type fluorescence spike tectorial membrane proppant to use trace substance tracer to develop as the core can conveniently be used for oil gas well fracturing crack monitoring, combines multiple tracer technical advantage, can optimize the core technology of present crack monitoring and evaluation, has sensitivity height, and is little to the environmental impact, and is good with current logging equipment corollary, easily at advantages such as well site and job site popularization.
Description
Technical Field
The invention belongs to the technical field of oil field drilling, and particularly relates to a slow-release fluorescent tracing tectorial membrane proppant for an oil field as well as a preparation method and application thereof.
Background
In recent years, the development of tight hydrocarbon reservoirs has been the focus of unconventional energy development concerns. And the horizontal well technology is an effective way for improving the development effect of the low-permeability oil field. Along with the wider application of the horizontal well staged volume fracturing technology in unconventional oil reservoir development, the horizontal well staged volume fracturing technology has important significance in mastering the fracturing effect for the test and monitoring of the horizontal well output section, further optimizing reservoir transformation and improving the oil well capacity. At present, the intelligent tracer monitoring technology is rapidly developed in the horizontal well fracturing production section test.
The underground intelligent tracer feeding method mainly comprises the following steps: (1) the liquid tracer is mixed in the fracturing fluid, enters the stratum along with the fracturing fluid, is dissolved in the stratum fluid, and then flows back to a wellhead along with the flowback fluid to be sampled and analyzed; (2) the method comprises the following steps of (1) throwing a tracer by utilizing a tracing device of a short section of an underground oil pipe, and selectively and slowly releasing the tracer after the underground device of a water outlet section contacts formation water under the condition that an underground packer is sealed in a segmented mode; (3) the tracer and the polymer material are mixed and molded to manufacture a solid strip which is put into the oil pipe nipple, and the outer surface of the tracer strip is covered with a screen to play a role in protecting and releasing the tracer.
The first putting method is characterized in that a large amount of tracer is discharged during the flowback period of the fracturing fluid, the monitoring time is about 2 months generally, and the effective period is short. The second and third methods require dedicated equipment and increase the investment cost. Therefore, the development of the fracturing fluid proppant slow-release surface coating tracer has important significance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a sustained-release fluorescent tracing tectorial membrane proppant for an oil field, and a preparation method and application thereof, which are used for solving the technical problems of large tracer dosage, short monitoring time, low sensitivity and the like in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a slow-release fluorescent tracing tectorial membrane proppant for oil fields, which has the following structure:
furthermore, the slow-release fluorescent tracing coated proppant for the oil field is prepared by mixing diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens in a solvent for reaction.
Further, the molar ratio of the diisocyanate to the aromatic compound containing two active hydrogens is (1-1.3): 1.
Furthermore, the amount of the aromatic compound containing two active hydrogens is 3 to 7 percent by mass.
Further, the diisocyanate is hexamethylene diisocyanate or isophorone diisocyanate.
Further, the aromatic compound containing two active hydrogens is 1-amino-7-naphthol, 2-nitroso-1-naphthol or 2-naphthol-7-sodium sulfonate.
Further, the solvent is propylene glycol methyl ether acetate or N, N-dimethylformamide.
The invention also discloses a preparation method of the sustained-release fluorescent tracing tectorial membrane proppant for the oil field, which comprises the following steps:
diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens are mixed in a solvent to react, and the slow-release fluorescent tracing coated proppant for the oil field is obtained.
Further, the reaction temperature is 60-80 ℃, and the reaction time is 1-5 h.
The invention also discloses an application of the slow-release fluorescent tracing coated proppant for the oil field, and the slow-release fluorescent tracing coated proppant for the oil field is used for monitoring the fracturing fracture of the oil-gas well.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a slow-release fluorescent tracing coated proppant for oil fields, which is obtained by mixing diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens in a solvent for reaction, wherein the aromatic compounds containing two active hydrogens can emit fluorescence under the condition of specific excitation wavelength and can be injected into a stratum as a tracer, samples taken from different cracks are subjected to fluorescence intensity measurement, and the types and the number of the samples are rapidly, simply and conveniently judged by using fluorescence spectrum, so that the crack states are reflected.
The invention also discloses a preparation method of the sustained-release fluorescent tracing tectorial membrane proppant for the oil field, which is simple to operate, economic and environment-friendly, easy for large-scale production and wide in application prospect.
The invention also discloses application of the slow-release fluorescent tracing coated proppant for the oil field in oil-gas well fracture monitoring, the functional tracing coated proppant developed by taking a trace substance tracer as a core can be conveniently used for oil-gas well fracture monitoring, various tracing technical advantages are combined, the core technology of the current fracture monitoring and evaluation can be optimized, and the slow-release fluorescent tracing coated proppant has the advantages of high sensitivity, small influence on the environment, good matching with the existing logging equipment, easiness in popularization in well fields and construction sites and the like. The detection center for monitoring the well is fixed on the polymer by using hexamethylene diisocyanate and then covered on the propping agent, and after the well is opened and produced, the hydrolysis reaction is utilized to release the polymer in a fixed point and positioning manner. According to the related experiment results, compared with the traditional tracer, the detection agent has the characteristics of less dosage, lower cost and the like because 10g of ceramsite releases 0.01g of detection center in 100 days.
Drawings
FIG. 1 is a diagram of the synthetic mechanism of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 1 of the present invention;
FIG. 2 is a graph showing the change in concentration of 1-amino-7-naphthol detected by fluorescence spectroscopy when the sustained-release fluorescent tracer coated proppant for oil fields prepared in example 1 is used for monitoring fracturing fractures of oil and gas wells.
Detailed Description
To make the features and effects of the present invention comprehensible to those skilled in the art, general description and definitions are made below with reference to terms and expressions mentioned in the specification and claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The theory or mechanism described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, i.e., the present disclosure may be practiced without limitation to any particular theory or mechanism.
All features defined herein as numerical ranges or percentage ranges, such as values, amounts, levels and concentrations, are for brevity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to cover and specifically disclose all possible subranges and individual numerical values (including integers and fractions) within the range.
Unless otherwise specified herein, "comprising," including, "" containing, "" having, "or the like, means" consisting of … … "and" consisting essentially of … …, "e.g.," a comprises a "means" a comprises a and the other, "and" a comprises a only.
In this context, for the sake of brevity, not all possible combinations of features in the various embodiments or examples are described. Therefore, the respective features in the respective embodiments or examples may be arbitrarily combined as long as there is no contradiction between the combinations of the features, and all the possible combinations should be considered as the scope of the present specification.
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The following examples use instrumentation conventional in the art. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out under conventional conditions or conditions recommended by the manufacturers. The various starting materials used in the examples which follow, unless otherwise indicated, are conventional commercial products having specifications which are conventional in the art. In the description of the present invention and the following examples, "%" represents weight percent, "parts" represents parts by weight, and proportions represent weight ratios, unless otherwise specified.
The invention discloses a slow-release fluorescent tracing tectorial membrane proppant for oil fields, which has the following structural formula:
the specific preparation process is realized by the following reaction:
the principle is as follows: diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens are used as raw materials, and a film coating agent stock solution for tracing is prepared through urethane reaction. The novel trace substance coated proppant for tracing is obtained by wrapping the coated proppant on the traditional proppant ceramsite, the controllable release of the tracer in practical application is realized, a method for estimating the position by detecting the concentration of an aromatic compound containing two active hydrogens is established, the defects of small quantity of the tracer, large using amount, low sensitivity and the like in the prior art are overcome, and the obtained proppant has the advantages of high detection sensitivity, low adsorption and the like, and is favorable for practical application and popularization of a well site.
The invention is further illustrated by the following specific examples and figures:
example 1
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
mixing 5.3g of hexamethylene diisocyanate, 0.5g of triethanolamine and 5.0g of 1-amino-7-naphthol in 89.2g of N, N-dimethylformamide, heating to 60 ℃, and reacting for 1h to obtain the slow-release fluorescent tracing and laminating propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 1, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 15.0g of the coated ceramsite is soaked in 85.0g of water, the temperature is kept at 80 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 85.0g of water again, detecting for 24 hours, repeating the steps for 3 months, and observing the change trend of the release concentration, so that the monitoring of the fracturing fracture of the oil-gas well can be realized. The trend is shown in table 1.
Table 1 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 1
Example 2
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
6.4g of hexamethylene diisocyanate, 0.6g of triethanolamine and 6.0g of 1-amino-7-naphthol are mixed in 88g of N, N-dimethylformamide, the temperature is raised to 80 ℃, and the reaction is carried out for 2 hours, thus obtaining the slow-release fluorescent tracing coated film propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 2, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 20.0g of the film-coated ceramsite is soaked in 80.0g of water, the temperature is kept at 100 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 80.0g of water again, detecting for 24 hours, repeating the steps for 3 months, and observing the change trend of the release concentration, so that the monitoring of the fracturing fracture of the oil-gas well can be realized. The trend is shown in table 2.
Table 2 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 2
Example 3
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
mixing 7.4g of hexamethylene diisocyanate, 0.7g of triethanolamine and 7.0g of 1-amino-7-naphthol in 86.9g of N, N-dimethylformamide, heating to 80 ℃, and reacting for 4 hours to obtain the slow-release fluorescent tracing and laminating propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 3, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 20.0g of the film-coated ceramsite is soaked in 80.0g of water, the temperature is kept at 100 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 80.0g of water again, detecting for 24 hours, repeating the steps for 3 months, and observing the change trend of the release concentration, so that the monitoring of the fracturing fracture of the oil-gas well can be realized. The trend is shown in table 3.
Table 3 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 3
Example 4
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
mixing 8.5g of hexamethylene diisocyanate, 0.8g of triethanolamine and 8.0g of 1-amino-7-naphthol in 85.6g of N, N-dimethylformamide, heating to 60 ℃, and reacting for 3 hours to obtain the slow-release fluorescent tracing and laminating propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 4, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 10.0g of the film-coated ceramsite is soaked in 90.0g of water, the temperature is kept at 60 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 90.0g of water again, detecting for 24 hours, repeating the steps for 3 months, observing the change trend of the release concentration, and monitoring the fracturing fracture of the oil-gas well. The trend is shown in table 4.
Table 4 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 4
Example 5
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
9.5g of hexamethylene diisocyanate, 0.9g of triethanolamine and 9.0g of 1-amino-7-naphthol are mixed in 84.6g of N, N-dimethylformamide, the temperature is raised to 75 ℃, and the reaction is carried out for 3 hours, thus obtaining the slow-release fluorescent tracing and laminating propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 5, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 20.0g of the film-coated ceramsite is soaked in 80.0g of water, the temperature is kept at 80 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 80.0g of water again, detecting for 24 hours, repeating the steps for 3 months, and observing the change trend of the release concentration, so that the monitoring of the fracturing fracture of the oil-gas well can be realized. The trend is shown in table 5.
Table 5 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 5
Example 6
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
10.6g of hexamethylene diisocyanate, 1.0g of triethanolamine and 10.0g of 1-amino-7-naphthol are mixed in 83.4g of N, N-dimethylformamide, the temperature is raised to 70 ℃, and the reaction is carried out for 3 hours, thus obtaining the slow-release fluorescent tracing and laminating propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 6, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 10.0g of the film-coated ceramsite is soaked in 90.0g of water, the temperature is kept at 60 ℃, and the concentration of the 1-amino-7-naphthol is detected after 24 hours. And (4) adding 90.0g of water again, detecting for 24 hours, repeating the steps for 3 months, observing the change trend of the release concentration, and monitoring the fracturing fracture of the oil-gas well. The trend is shown in table 6.
Table 6 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 6
Example 7
A preparation method of a slow-release fluorescent tracing tectorial membrane proppant for oil fields comprises the following steps:
mixing 5.9g of isophorone diisocyanate, 3.9g of triethanolamine and 5.0g of 2-nitroso-1-naphthol in 85.2g of propylene glycol methyl ether acetate, heating to 80 ℃, and reacting for 2h to obtain the slow-release fluorescent tracing coated film propping agent for the oil field.
The obtained sustained-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of the oil and gas well and comprises the following specific steps:
soaking the ceramsite in the slow-release fluorescent tracing coated proppant for the oil field obtained in the example 7, and drying the ceramsite into a film through a fluidized bed to obtain coated ceramsite; 10.0g of the film-coated ceramsite is soaked in 90.0g of water, the temperature is kept at 60 ℃, and the concentration of the 2-nitroso-1-naphthol is detected after 24 hours. And (4) adding 90.0g of water again, detecting for 24 hours, repeating the steps for 3 months, observing the change trend of the release concentration, and monitoring the fracturing fracture of the oil-gas well. The trend is shown in table 7.
Table 7 detection data of the sustained-release fluorescent tracer coated proppant for oil field prepared in example 7
Fig. 1 is a tracing principle diagram of the sustained-release fluorescent tracing tectorial membrane proppant for oil field prepared in example 1, and the principle is as follows: the slow-release fluorescent tracing coated proppant for the oil field for tracing is prepared by taking hexamethylene diisocyanate, triethanolamine and 1-amino-7-naphthol as raw materials and performing urethane reaction. The slow-release fluorescent tracing coated proppant for the oil field for tracing is wrapped on the traditional proppant ceramsite to obtain a novel coated proppant for trace substance tracing, the controllable release of the tracer in practical application is realized, a method for estimating the position by detecting the concentration of 1-amino-7-naphthol is established, the defects of small quantity of the tracer, large using amount, low sensitivity and the like in the prior art are overcome, and the obtained proppant has the advantages of high detection sensitivity, low adsorption and the like, and is beneficial to practical application and popularization of a well site.
FIG. 2 is a graph showing the change of 1-amino-7-naphthol concentration detected by fluorescence spectroscopy when the sustained-release fluorescent tracer coated proppant for oil fields prepared in example 1 is used for monitoring fracturing fractures of oil and gas wells, and it can be seen from the graph that the concentration of 1-amino-7-naphthol is 10-6When the concentration is mol/L, the wavelength corresponding to the maximum fluorescence intensity is 457 nm; concentration of 1-amino-7-naphthol 10- 7The wavelength corresponding to the maximum fluorescence intensity at mol/L was 462 nm.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The slow-release fluorescent tracing and laminating proppant for the oil field is characterized by having the following structure:
2. the oilfield slow-release fluorescent tracing and laminating proppant as claimed in claim 1, wherein the oilfield slow-release fluorescent tracing and laminating proppant is obtained by mixing diisocyanate, triethanolamine and an aromatic compound containing two active hydrogens in a solvent for reaction.
3. The oilfield slow-release fluorescent tracing tectorial membrane proppant as claimed in claim 2, wherein the molar ratio of the diisocyanate to the aromatic compound containing two active hydrogens is (1-1.3): 1.
4. The oilfield slow-release fluorescent tracing tectorial membrane proppant as claimed in claim 2, wherein the aromatic compound containing two active hydrogens is used in an amount of 3-7% by mass.
5. The slow-release fluorescent tracing tectorial membrane proppant for oil fields as claimed in claim 2, characterized in that, the diisocyanate is hexamethylene diisocyanate or isophorone diisocyanate.
6. The slow-release fluorescent tracing coated proppant for oil fields as claimed in claim 2, wherein the aromatic compound containing two active hydrogens is 1-amino-7-naphthol, 2-nitroso-1-naphthol or 2-naphthol-7-sodium sulfonate.
7. The slow-release fluorescent tracing tectorial membrane proppant for oil fields as claimed in claim 2, characterized in that, the solvent is propylene glycol methyl ether acetate or N, N-dimethylformamide.
8. The preparation method of the sustained-release fluorescent tracing tectorial membrane proppant for the oil field as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
diisocyanate, triethanolamine and aromatic compounds containing two active hydrogens are mixed in a solvent to react, and the slow-release fluorescent tracing coated proppant for the oil field is obtained.
9. The preparation method of the slow-release fluorescent tracing tectorial membrane proppant for the oil field as claimed in claim 8, characterized in that the reaction temperature is 60-80 ℃ and the reaction time is 1-5 h.
10. The application of the slow-release fluorescent tracing tectorial membrane proppant for the oil field as claimed in any one of claims 1-7, characterized in that the slow-release fluorescent tracing tectorial membrane proppant for the oil field is used for monitoring the fracturing fracture of oil and gas wells.
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