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Comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample

A two-dimensional gas chromatography, adamantane technology, applied in the field of adamantane compounds, can solve the problems of high cost of chromatographic columns, waste of time, long analysis method time, etc., and achieve the effects of fast analysis speed, large peak capacity and good sensitivity

Active Publication Date: 2012-11-07
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the report only disclosed the qualitative information of adamantane compounds, and did not involve the quantitative analysis of such compounds
Moreover, the chromatographic column used in the report is expensive and the analysis method takes a long time. It takes at least 2 hours to analyze a sample. During the mass spectrometry acquisition period, liquid nitrogen needs to be filled continuously, which wastes time and increases the analysis cost.
[0005] In summary, there is still no satisfactory quantitative analysis method for adamantane compounds both at home and abroad.

Method used

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  • Comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample
  • Comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample
  • Comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample

Examples

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Embodiment 1

[0037] This example provides a method for quantitative analysis of adamantanes in petroleum samples, which is for the condensate of Well Guang'an 125 in the central and northern regions of Sichuan Basin and Kela 205 in the Kuqa area of ​​the Tarim Basin (see Table 1 for sample information). Methods for quantitative analysis of samples.

[0038] Table 1 Sample information

[0039] hashtag

Well section (m)

layers

lithology

Guang'an 125

2529-2536，2544-2558

Sushi

Condensate

carat 205

3789-3952.5

E+K

Condensate

[0040] The method includes the following steps:

[0041] (1) Prepare the sample to be tested

[0042] Use a pipette to take 500 μL of the above-mentioned condensate samples and place them in 1.5mL sample bottles, and add the prepared D with a concentration of 0.0632mg / mL 16 - 300 μL of adamantane standard sample to obtain the sample to be tested, which is quickly sealed for use.

[0043] (2) Compreh...

Embodiment 2

[0058] This example provides a method for quantitative analysis of adamantanes in petroleum samples, which is for Ma 3 well, Lunnan 62 well, Lungu 38 well, Lunnan 57 well, Hade 4 well and Jiefang 100 well in the Tarim area. 6 crude oil samples of well (sample information see table 3) carry out the method for quantitative analysis, it comprises the following steps:

[0059] (1) Prepare the sample to be tested

[0060] Put about 1.8g of fine silica gel (100-200 mesh, activated for 4h at 200°C) into a glass column under shaking; take about 30mg of a sample, dissolve it with an appropriate amount of n-hexane (re-distilled analytically pure), and add a concentration of 0.0632 mg / mL D 16 - 300 μL of adamantane standard sample, then all transferred to a glass column, rinsed with 3 mL of n-hexane, collected eluted fractions, concentrated into a 1.5 mL autosampler bottle, and obtained the sample to be tested for analysis.

[0061] (2) Comprehensive two-dimensional gas chromatography ...

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Abstract

The invention relates to a comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample. The method comprises the steps of (1) preparing to-be-detected sample; (2) analyzing the to-be-detected sample with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC*GC-TOFMS) to obtain peak information of diamondoid hydrocarbons in the to-be-detected sample; (3) analyzing the to-be-detected sample with comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector (GC*GC-FID) to obtain GC*GC-FID spectrogram of the to-be-detected sample; according to the peak information obtained in step (2), determining peak positions of diamondoid hydrocarbons and D16-adamantane in the GC*GC-FID spectrogram, and obtaining their peak area integration results; and (5) calculating according to internal standard method to obtain quantitative results of diamondoid hydrocarbons. The method is suitable for quantitative determination of diamondoid hydrocarbons in all crude oil and rock extract samples.

Description

technical field [0001] The invention relates to a method for quantitatively analyzing adamantane compounds in petroleum samples by comprehensive two-dimensional gas chromatography, belonging to the technical field of petroleum sample analysis. Background technique [0002] Adamantanes are a special cyclic hydrocarbon compound in crude oil, which has a carbon skeleton structure similar to diamond, and its stability determines its strong resistance to heat and biodegradation during geological evolution. In the process of petroleum maturation, adamantane compounds always exist, and their relative content will increase with the increase of maturity. In high-mature crude oil and condensate oil, common biomarker compounds such as sterane and hopane are missing, and adamantane compounds have become important indicators for judging maturity. In addition, adamantane compounds can also be used to judge the cracking degree of crude oil. Dahl et al. (Dahl J E, Moldowan J M, Peters K E...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 王汇彤张水昌翁娜
Owner PETROCHINA CO LTD
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