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Daily Variation of Natural Emission of Methane to the Atmosphere and Source Identification in the Luntai Fault Region of the Yakela Condensed Oil/Gas Field in the Tarim Basin, Xinjiang, China

地质学报（英文版）2007，Vol.81Issue(5)：771-778,8.

Daily Variation of Natural Emission of Methane to the Atmosphere and Source Identification in the Luntai Fault Region of the Yakela Condensed Oil/Gas Field in the Tarim Basin, Xinjiang, China

作者信息

1. Dept. of Environmental Engineering and Science, Hongzhou Danzi University,Hongzhou 310018, China;Key Laboratory of Biogeology and Environmental geology of Ministry of Education,China University of Geosciences, Wuhan 430074, China;Key Laboratory of Biogeology and Environmental geology of Ministry of Education,China University of Geosciences, Wuhan 430074, China;Key Laboratory of Biogeology and Environmental geology of Ministry of Education,China University of Geosciences, Wuhan 430074, China;Dept. of Earth Sciences, Sun Yat-sen University, Guangzhou 510275, China
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摘要

Abstract

The static flux chamber method was applied to study natural emissions of methane to the atmosphere in the Luntai fault region of Yakela Condensed Oil/Gas Field in the Tarim Basin,Xinjiang Municipality, northwestern China. Using an online method, which couples together a gas chromatography/high-temperature conversion/isotope ratio mass spectrometry (GC/C/MS), 13C/12C ratios of methane in flux chambers were measured and showed that methane gases are liable to migrate from deep oil/gas reservoirs to the surface through fault regions and that a part of the migrated methane, which remains unoxidized can be emitted into the atmosphere. Methane emission rates were found to be highest in the mornings, lowest in the afternoons and then increase gradually in the evenings. Methane emission rates varied dramatically in different locations in the fault region. The concentrations increased gradually, which reveals that methane released from the fault region might come from thermogenic methane of the deep condensed oil/gas reservoir.

关键词

condensed oil/gas field, fault-controlled methane emission, carbon isotopes, flux chamber,Xinjiang

Key words

condensed oil/gas field, fault-controlled methane emission, carbon isotopes, flux chamber,Xinjiang

分类

天文与地球科学

引用本文复制引用

..Daily Variation of Natural Emission of Methane to the Atmosphere and Source Identification in the Luntai Fault Region of the Yakela Condensed Oil/Gas Field in the Tarim Basin, Xinjiang, China[J].地质学报（英文版）,2007,81(5):771-778,8.

基金项目

This study was supported by the Natural Science Foundation of China (grant No. 40273034) and the Science Foundation of Hongzhou Danzi University. （grant No. 40273034）

地质学报（英文版）

ISSN：1000-9515

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