Research on the Correlation between Methane and Hydrogen in Acid-hydrolyzed Gases for Geochemical Exploration Samples

Zhong-yu LI; Jiang-hua ZHAO; Jun HE; Yan-guang LI; Wei-liang LI; Wei HAN

doi:10.15898/j.cnki.11-2131/td.201710240170

Rock and Mineral Analysis > 2018 > 37(3): 313-319. > DOI: 10.15898/j.cnki.11-2131/td.201710240170

Zhong-yu LI, Jiang-hua ZHAO, Jun HE, Yan-guang LI, Wei-liang LI, Wei HAN. Research on the Correlation between Methane and Hydrogen in Acid-hydrolyzed Gases for Geochemical Exploration Samples[J]. Rock and Mineral Analysis, 2018, 37(3): 313-319. DOI: 10.15898/j.cnki.11-2131/td.201710240170

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Research on the Correlation between Methane and Hydrogen in Acid-hydrolyzed Gases for Geochemical Exploration Samples

Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China

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Received Date: October 23, 2017
Revised Date: December 21, 2017
Accepted Date: March 20, 2018
Published Date: April 30, 2018

Abstract

HIGHLIGHTS
(1) There is a strongly positive correlation between the contents of hydrogen and methane according to the experiment results.

(2) The reason for positive correlation between hydrogen and methane was investigated by X-ray Fluorescence Spectrometry, X-ray Diffraction, Laser Raman Spectroscopy and other methods.

(3) The results of the study provide the possibility for acid hydrolysis of hydrogen to become a new indicator for oil and gas exploration.

ABSTRACT

Acidolysis hydrocarbon is an important index with relatively high accuracy in the geochemical exploration for oil and gas and has been widely used. Detailed study of acid-hydrolyzed gases can help further explain its mechanism and help develop new analytical indicators. The content of acidolysis hydrocarbons and other gas released by hydrochloric acid in the samples from geochemical exploration for oil and gas by Gas Chromatography have been determined, and are presented in this paper. There is a positive correlation between the contents of methane and non hydrocarbon gas. The elements and mineral composition of the sample were measured by X-ray Fluorescence Spectrometry (XRF) and X-ray Diffraction (XRD), respectively, whereas the gas-liquid inclusion composition was analyzed by Laser Raman Spectroscopy after sample smashing. The conclusions are as follows:(1) The content of methane and hydrogen in the acidolysis hydrocarbons is independent of the elemental composition of the sample and is positively related to the carbonate minerals. The contents of methane and hydrogen can reflect the situation of deep oil and gas. (2) Two kinds of gas do not exist in the form of physical adsorption but in the smaller space. It is proved that the analysis method of acid hydrolysis hydrocarbon has high stability. (3) There is direct evidence that two kinds of gases exist in the inclusions at the same time, which infers that two types of gases have the same source. Due to the correlation between methane and hydrogen, the content of hydrogen from acidolysis hydrocarbons will be a new analysis index in the geochemical exploration for oil and gas.
- geochemical exploration for oil and gas,
- acidolysis hydrocarbons,
- inclusion,
- methane,
- hydrogen

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