A kind of rapid pretreatment method of adamantane compounds in crude oil

A technology of adamantane and compounds, applied in the field of oil and gas geochemical analysis of petroleum samples, can solve the problems of environmental pollution, chromatographic column damage, long cycle, etc., and achieve the effects of short pretreatment time, good reproducibility, and easy operation

Inactive Publication Date: 2015-11-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When directly injecting samples, high-boiling components such as colloids and asphaltene in crude oil samples will directly damage the column efficiency and ion source, reduce the separation ability of the chromatographic column, and cause long-term damage to the chromatographic column, reducing the efficiency of the chromatographic column. Improve the sensitivity of mass spectrometry detection, increase the multiplier tube voltage
Although column chromatography can effectively separate crude oil components, this method requires more glassware, consumes a large amount of organic solvents, has a long cycle, pollutes the environment, and seriously endangers the health of experimenters
During the process, the solution needs to be rotatably evaporated in a water bath at 43-46°C until it is nearly dry (about 2mL); Light hydrocarbon components are easy to lose during the drying process, which has a great impact on the accurate quantitative analysis of adamantane, directly leads to errors in the analysis of adamantane compounds, and fails to accurately reflect crude oil information. The parameters obtained by using this pretreatment method need to be cautious use

Method used

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  • A kind of rapid pretreatment method of adamantane compounds in crude oil
  • A kind of rapid pretreatment method of adamantane compounds in crude oil
  • A kind of rapid pretreatment method of adamantane compounds in crude oil

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Embodiment 1

[0029] This embodiment provides an efficient and rapid pretreatment method for adamantane compounds in petroleum samples. The pretreatment method is used in combination with comprehensive two-dimensional gas chromatography / time-of-flight mass spectrometry to analyze condensate oil samples in the Pearl River Mouth Basin (Oil-1, Light yellow liquid, turbid, low density, low viscosity, 3462-3534m) for quantitative analysis.

[0030] The steps of the pre-processing method used in this embodiment are as follows:

[0031] (1) Preheat the instrument in the liquid phase microextraction device used in this method, the preheating temperature is 20℃, and the preheating time is 15min;

[0032] (2) Insert glass wool into the lower end of the upper and lower transparent sample tube, and use a micro syringe to move the 7mg crude oil sample onto the glass wool, put the sample tube into the heating tank, and plug a spacer on the top of the heating tank pad;

[0033] (3) Place the cylinder of the micr...

Embodiment 2

[0046] This embodiment provides an efficient and rapid pretreatment method for adamantane compounds in petroleum samples, and combines comprehensive two-dimensional gas chromatography / time-of-flight mass spectrometry to analyze condensate oil and light oil samples in Myanmar (sample information is shown in Table 4 below) Perform quantitative analysis.

[0047] Table 4 Crude oil sample information in Myanmar

[0048]

[0049]

[0050] The steps of the pre-processing method used in this embodiment are as follows:

[0051] (1) Preheat the instrument in the liquid phase microextraction device used in this method, the preheating temperature is 20℃, and the preheating time is 7min;

[0052] (2) Insert glass wool into the lower end of the upper and lower transparent sample tube, and use a micro syringe to transfer the 4mg crude oil condensate sample to the glass wool, transfer 10mg light oil crude oil sample to the glass wool, and transfer the sample Put the tube into the heating tank, and ...

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Abstract

The invention provides a quick pretreatment method for adamantane compounds in crude oil. The quick pretreatment method comprises the following steps: preheating an instrument; inserting glass wool into the lower end of a sample tube, and transferring crude oil sample to the glass wool; putting a cylinder of a micro syringe into a condenser, and puncturing a sample injection cushion at the top end of the sample tube through a needle of the micro syringe to expose the top end of the needle from the bottom surface of the sample injection cushion; introducing nitrogen into the bottom of the sample tube, regulating the flow speed of the nitrogen to be 1-4mL / min, and adding an extracting solvent into the cylinder of the micro syringe; setting the heating temperature of a heating tank to be 270-310 DEG C, and heating and extracting the sample tube; after extraction is finished, pulling out the micro syringe, and transferring an extracting solvent (A) into a chromatographic sample injection bottle. According to the quick pretreatment method provided by the invention, the defects in the prior art are overcome, the damage to the instrument caused by a test sample can be effectively avoided, and the adamantane compounds in the crude oil sample can be accurately and quantitatively analyzed.

Description

Technical field [0001] The invention relates to a pretreatment method of adamantane compounds in crude oil samples, which is suitable for the pretreatment of condensate oil, light oil and normal crude oil in the field of oil and gas exploration, and belongs to the technical field of petroleum sample oil and gas geochemical analysis. Background technique [0002] Oil and gas accumulation analysis and testing technology has developed rapidly at home and abroad in recent years. Determining the maturity of crude oil is of great significance for identifying oil sources and making reliable evaluations of oil and gas resources. A variety of biomarker compounds can be used to study the maturity of source rocks and crude oil, but for medium and high maturity source rocks (vitrinite reflectance Ro> 0.9%~1.0%) and crude oil, the more effective biomarker compound indicators, such as C 29 Steranes 20S / (20S+20R), terpenes Ts / Tm, etc., fail due to reaching the equilibrium point of thermal evo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/08
Inventor 朱书奎张万峰李东浩朴相范童婷代威何生
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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