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Method and device for analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil

A compound, a single technology, applied in the field of petroleum exploration, to achieve high degree of automation and good repeatability

Pending Publication Date: 2020-08-28
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is currently no automated method for simultaneously obtaining sulfur isotopes of multiple single sulfur compounds

Method used

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  • Method and device for analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil
  • Method and device for analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil
  • Method and device for analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil

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Embodiment 1

[0040] This embodiment uses the device and method of the present invention to analyze the sulfur isotopes of multiple single sulfur-containing compounds in the full depth 1 (sulfur content 0.45wt%) of Tarim Oilfield crude oil, specifically comprising the following steps:

[0041] The heating program of gas chromatography is as follows: the initial temperature is 100°C, and the temperature is raised to 300°C at a speed of 10°C / min, and the column size is 30m×0.25mm×0.25μm. The injection volume of crude oil sample A was 1 μL, the carrier gas was He, and the flow rate was 3 mL / min. The injection port temperature was 300°C and the transfer line temperature was 195°C.

[0042]The parameter setting values ​​of ICP-MS are: power 1200W, transmission line gas flow rate Ar 1.5L / min, auxiliary gas is SF diluted with He 6 , the flow rate is 8mL / min. The measured data of multiple single sulfur isotopes are detailed in Figure 2-Figure 4 ; The unit of sulfur isotope data in the figure is...

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Abstract

The invention discloses a method and a device for analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil. The method comprises the following steps: after a crude oil sample is vaporized and separated by a gas chromatograph, the crude oil sample and gas of a sulfur-containing standard sample enter a multi-receiving inductively coupled plasma mass spectrometer together to analyze sulfur isotopes; a ratio of the signal intensities of 34S to 32S in the sulfur-containing standard sample and a ratio of the signal intensities of 34S to 32S in different single sulfur-containing compounds in the crude oil sample are analyzed, so as to obtain an isotope ratio of the sulfur elements in different single sulfur-containing compounds. The method is used for simultaneously analyzing sulfur isotopes of a plurality of single sulfur-containing compounds in crude oil by combining a gas chromatograph with an inductively coupled plasma mass spectrometer (ICPMS). According to the method disclosed by the invention, the precision of analyzing the sulfur isotope values of a plurality of single sulfur-containing compounds in the petroleum is 0.01%, and the lower limit ofdetection of the sulfur element is 40pmol / L.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a method and a device for analyzing sulfur isotopes of multiple single sulfur-containing compounds in crude oil. Background technique [0002] Sulfur is an important component of many natural organic compounds and synthetic organic compounds. Sulfur has certain chemical reactivity and redox properties. These characteristics make sulfur a reactant, intermediate and final product of various natural and geochemical processes. Sulfur undergoes isotopic fractionation in redox reactions, and the sulfur isotopes of organic sulfur-containing compounds record these fractionated redox reactions. Therefore, analysis of the sulfur isotopes of specific organic molecules can determine the origin and formation process of these organic molecules. Sulfur isotopes can play an important role in the traceability of sulfur-containing organic gases in the atmosphere, the study of the sulfidation...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/72G01N30/86
CPCG01N30/02G01N30/7206G01N30/8679G01N2030/7226
Inventor 王萌朱光有张志遥
Owner PETROCHINA CO LTD
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