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Oil product leakage monitoring technology adopting radioactive tracer

A technology of radioactive tracers and oil products, which is applied in earthwork drilling, wellbore/well parts, evaporation, etc., can solve the problem of inability to accurately describe the diffusion and migration of petroleum pollutants, and the inability to implement real-time monitoring in oil storage areas, technical Obvious defects and other problems, achieve rapid detection and real-time response, reduce stickiness, and monitor a wide range of effects

Inactive Publication Date: 2021-01-05
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only time-consuming and costly, it is prone to missed detection, and it cannot detect problems in time in the early stage of leakage, and cannot accurately describe the diffusion and migration of petroleum pollutants underground, which may lead to secondary pollution and other defects
In recent years, methods such as the resistivity method have been gradually applied to such problems, but the technical defects are also obvious
One is that real-time monitoring cannot be implemented for the oil storage area (or oil storage tank) as the pollution source; the other is that it needs to be laid out, but due to the randomness of the time and location of the leakage accident, this kind of monitoring is easy to miss judgment

Method used

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  • Oil product leakage monitoring technology adopting radioactive tracer
  • Oil product leakage monitoring technology adopting radioactive tracer
  • Oil product leakage monitoring technology adopting radioactive tracer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of a radioactive tracer, comprising the following steps:

[0050] 1) Take the isotopic tracer K with an activity of 50mCi 35 Dissolve SCN in a hydrochloric acid solution with a concentration of 2.0mol / L to prepare a mixed solution with a specific activity of 5mCi / L, then immerse the fine-pored silica gel with a particle size of 400-500μm in the hydrochloric acid solution, and then at a temperature of 130°C, Stir at a stirring rate of 150 r / min until the porous carrier is dry to obtain a fine-pore silica gel loaded with an isotope tracer; the amount of fine-pore silica gel added is 1.0 times the weight of the isotope tracer;

[0051] 2) Take fine-pore silica gel loaded with isotope tracer, add precipitant solution to it, stir and react at 45°C for 60min, and then stir at 180°C until dry to obtain fine-pore silica gel loaded with insoluble substances; precipitate Agent solution is the nitric acid solution that silver nitrate concentration is 1.0g / L, ...

Embodiment 2

[0054] A kind of preparation method of radiotracer, repeat the operation steps of embodiment 1, difference is:

[0055] In step 1), the activity of the isotope tracer is 70mCi, and the porous carrier is activated carbon with a particle size of 600-800 μm;

[0056] Step 2) in, precipitant solution is the nitric acid solution that silver nitrate concentration is 1.25g / L, and the solid-liquid ratio of isotope tracer and precipitant solution is 1g:1.3L; Concrete steps are: take load to have isotope tracer Add the precipitating agent solution to the activated carbon, stir and react at 40°C for 45min, then stir at 200°C until dry to obtain activated carbon loaded with insoluble substances;

[0057] In step 3), the hydrophobic solvent is a mixed solvent of tetrachloroethylene and polydimethylsiloxane, by weight, tetrachloroethylene:polydimethylsiloxane=1:0.5, polydimethylsiloxane The weight average molecular weight is 5000g / mol; Acetyl tributyl citrate and glycerol monopalmitate are...

Embodiment 3

[0059] As an improvement to the preparation method of the radiotracer, in the technical solution of this embodiment, adipic acid dihydrazide and potassium pyrophosphate are added to the precipitant solution, and their contents in the precipitant solution are respectively 0.3-0.5M And 0.3-1.0M, when the isotope and silver nitrate precipitate, both are also adsorbed in the pores of the carrier, which promotes the enhancement of the tightness of the precipitate and the carrier, and further reduces the leaching rate of the isotope tracer in the soaked state. The leaching rate of the isotope tracer is not higher than 7%, further reducing the loss of the isotope tracer; it can also improve the temperature stability of the tracer, and the high temperature resistance can reach 130°C, and it will not be destroyed at room temperature and high temperature. It can accurately feed back oil product information and reduce the difficulty of oil product monitoring.

[0060] A kind of preparati...

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Abstract

The invention provides an oil product leakage monitoring technology adopting a radioactive tracer, and relates to the technical field of oil product permeation detection. A preparation method of the radioactive tracer comprises the following steps of: loading an isotope tracer on a porous carrier in an acid solution; providing a precipitant solution, wherein the precipitant can react with the isotope tracer to form an insoluble substance; and providing a hydrophobic solvent, performing surface hydrophobic treatment on the porous carrier loaded with the insoluble substance by the hydrophobic solvent, and drying to obtain the radioactive tracer. The monitoring technology comprises the following steps: acquiring initial state data by using a detection module; transmitting the initial state data to a server side for automatic storage, and determining a background value; measuring measured signal values at various moments, and transmitting the measured signal values to the server side for automatic storage; and comparing the measured signal values at various moments with the background value, transmitting an alarm signal to an alarm module by the server side when result data changes suddenly, and outputting information of a leakage position and an oil substance diffusion track in an area.

Description

technical field [0001] The invention belongs to the technical field of oil penetration detection, and in particular relates to an oil leakage monitoring technology using a radioactive tracer. Background technique [0002] Petroleum is a serious pollutant. With the development of my country's economy in recent years, the number of domestic gas stations has continued to increase, and some oil storage tanks have serious aging problems, and the risk of oil storage tank leakage has also increased. There are many reasons for oil leakage, such as: unqualified welds, unqualified anti-corrosion materials, or accidental damage to the anti-corrosion layer during construction; the tank body is prone to corrosion due to the moisture and microorganisms in the soil; the oil inside the oil tank Containing water, after a long time, the bottom will stagnate and precipitate water, which will cause pitting corrosion on the steel of the oil tank; the uneven sinking of the tank foundation, earth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/11E21B49/00E21B47/13B01D1/00
CPCB01D1/00E21B49/00
Inventor 郭健
Owner ZHEJIANG OCEAN UNIV
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