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| Geochemical exploration of natural gas hydrate in mud volcano area of the Qiangtang Basin |
| YANG Zhi-Bin1, ZHOU Ya-Long1, SUN Zhong-Jun1, ZHANG Fu-Gui1, ZHANG Shun-Yao1, LI Guang-Zhi2 |
1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China;
2. Hefei Geochemical Exploration Institute, Research Institute of Exploration and Development, Sinopec, Hefei 230022, China |
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Abstract Mud volcano is one of the signs of gas hydrate, and it is the main evidence for the existence of natural gas hydrate. The permafrost area in Qiangtang basin has developed a lot of mud volcanoes, the geochemical exploration of mud volcanoes shows that acidolysis hydrocarbon and fluorescence spectra, carbonate, altered carbonate and trace elements geochemical indices are abnormal in mud volcanoes, and methane carbon isotope and three-dimensional fluorescence analytical results show that hydrocarbon geochemical anomalies of crude oil are genetically related to associated gas and condensate oil formation, and that the peripheral area of mud volcano exhibits hydrocarbon enrichment, formed by the leakage of oil and gas reservoir. The results obtained by the authors are of important significance for gas hydrate exploration breakthrough in Qiangtang basin.
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Received: 03 May 2016
Published: 20 June 2017
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