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Petroleum tracer agent, application thereof and oil field tracing method

A tracer and petroleum technology, applied in the field of detection and analysis, can solve the problems of limited application, large detection error, poor adaptability and selectivity, etc., and achieve the effect of improving detection sensitivity, improving efficiency and accuracy, and avoiding interference

Active Publication Date: 2022-01-28
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tracers are of great significance to the exploitation, design, cross-linking and later adjustment of oil fields and water wells. Common tracers in the prior art mainly include dye tracers, chemical tracers, radioisotopes, Trace substances, etc., but they have many shortcomings, which limit their application
For example, dye-based tracers have strong adsorption and large dosage; chemical tracers, such as ammonium nitrate and ammonium thiocyanate, have high cost, are easily adsorbed by rocks, have large detection errors, low test resolution, and are not suitable for poor selectivity, environmental and safety issues; radioactive isotopes have strong radioactivity, complicated analysis and testing methods, and high costs, which are not conducive to large-scale promotion and application; trace substances such as gadolinium elements are used, which have high requirements for detection and require high-end Analytical equipment such as inductively coupled plasma mass spectrometry, cost prohibitive

Method used

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  • Petroleum tracer agent, application thereof and oil field tracing method
  • Petroleum tracer agent, application thereof and oil field tracing method
  • Petroleum tracer agent, application thereof and oil field tracing method

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Experimental program
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Effect test

preparation example Construction

[0074] The carbon quantum dots can be prepared by microwave method or solvothermal method; the carbon quantum dots can be prepared by conventional preparation methods in the prior art.

[0075] The phosphorescent carbon quantum dots include at least one of red phosphorescent carbon quantum dots, green phosphorescent carbon quantum dots and blue phosphorescent carbon quantum dots. Phosphorescent materials of different colors are excited at different wavelengths, which can effectively eliminate the problem of spectral superposition and improve detection efficiency. Applying red phosphorescent carbon quantum dots, green phosphorescent carbon quantum dots and blue phosphorescent carbon quantum dots in the field of petroleum tracing at the same time, and applying phosphorescent carbon quantum dots with different phosphorescent lifetimes in the field of petroleum tracing at the same time, it is more convenient for the Phosphorescent carbon quantum dots distinguish the luminescence p...

Embodiment 1

[0088] 1. Preparation of blue phosphorescent carbon quantum dots (petroleum tracer):

[0089] Dissolve 1.5g of urea, 0.5g of citric acid, 0.2mL of phosphoric acid and 10mL of water in ultrasonic to obtain a mixed solution, then put the mixed solution into a microwave oven, set the power of the microwave to 800W, and the reaction time is 5min. After the reaction is completed, you will get The liquid was centrifuged at the speed of 10 min, centrifuged and washed 3 times under the same conditions to obtain a white solid, which was put into a freezer, and finally freeze-dried with a lyophilizer to obtain blue-light carbon quantum dots of white solid powder.

[0090] Disperse the blue-light carbon quantum dots obtained above in ethanol again, then add 2mL of polyethylene glycol 600 and 1.0g of boric acid, and then carry out a solution heat reaction, the reaction temperature is 180°C, and the reaction time is 6h. After the reaction is completed, it is naturally cooled to room tempera...

Embodiment 2

[0107] 1. Preparation of green phosphorescent carbon quantum dots (petroleum tracer):

[0108] Take 0.3g of pseudo-boehmite, 0.17g of manganese acetate tetrahydrate and 0.2g of boric acid dissolved in 20mL of deionized water, and add 0.56mL of phosphoric acid and 1.5g of triethylenetetramine, then put the mixed solution into To the high temperature reactor and react at 180°C for 10h. After the reaction, the obtained solution was centrifuged, and the substrate was washed with distilled water and then dried at 80° C. to finally obtain green phosphorescent carbon quantum dot powder.

[0109] 2. Stability test of petroleum tracer:

[0110] 2.1 Air Stability

[0111] Place the phosphorescent carbon quantum dots in the air, and test the phosphorescence intensity of the phosphorescent carbon quantum dots with the storage time at room temperature and normal pressure. The results are as follows: Figure 2-a shown. Phosphorescent carbon quantum dots were tested for phosphorescence i...

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Abstract

The invention discloses a petroleum tracer agent, the petroleum tracer agent is a phosphorescent carbon quantum dot, the phosphorescent carbon quantum dot comprises a carbon quantum dot body and a loading agent, and the phosphorescent carbon quantum dot has a phosphorescent characteristic. The petroleum tracer agent has a phosphorescence property, the phosphorescence service life of the petroleum tracer reaches a millisecond level, and the detection limit of the petroleum tracer can reach 0.3 ppm; by using the petroleum tracer agent with phosphorescence performance, the interference of petroleum self-fluorescence can be effectively avoided, so that the detection sensitivity is improved, and the petroleum tracer agent is environment-friendly; the phosphorescent carbon quantum dots with different phosphorescent lives are simultaneously applied to the field of petroleum tracing, so that the phosphorescent carbon quantum dots can be conveniently distinguished in luminescence peak positions, and the detection efficiency and accuracy are greatly improved; and according to the oil field tracing method, the oil well communication condition can be accurately detected, and a detection basis is provided for oil well exploration.

Description

technical field [0001] The invention belongs to the field of detection and analysis, and in particular relates to a petroleum tracer, an application thereof, and a method for tracing an oil field. Background technique [0002] Tracers are of great significance to the exploitation, design, cross-linking and later adjustment of oil fields and water wells. Common tracers in the prior art mainly include dye tracers, chemical tracers, radioisotopes, Trace substances, etc., but they have many disadvantages, which limit their application. For example, dye-based tracers have strong adsorption and large dosage; chemical tracers, such as ammonium nitrate and ammonium thiocyanate, have high cost, are easily adsorbed by rocks, have large detection errors, low test resolution, and are not suitable for poor selectivity, environmental and safety issues; radioactive isotopes have strong radioactivity, complicated analysis and testing methods, and high costs, which are not conducive to larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/02E21B47/11B82Y20/00B82Y30/00
CPCC09K11/65C09K11/025B82Y20/00B82Y30/00
Inventor 翟伟刘东强陆路春王允军
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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