| Use of brGDGTs in surface geochemical exploration for petroleum —A case study of oil and gas fields in the Jiyang depression |
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| 作者姓名： | ZHOU HaoDa HU JianFang XIONG YongQiang LIANG QianYong |
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| 作者单位： | State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry, Chinese Academy of Sciences;Graduate University of Chinese Academy of Sciences;Zhuhai Central Station of Marine Environmental Monitoring,State Oceanic Administration |
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| 基金项目： | supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCXZ-YW-JC103);contribution no.1866 from Guangzhou Institute of Geochemistry, Chinese Academy of Sciences |
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| 摘 要： | Branched glycerol dialkyl glycerol tetraethers(brGDGTs),likely produced by bacteria in soil and peat,are widely distributed,easily detected,newly adopted biomarker compounds.In this study,brGDGTs were used to explore the relationship between the absolute abundance of brGDGTs and the distribution of oil and gas fields in the Duoshiqiao area of the Jiyang depression.The results showed that the concentrations at the Xiakou fault and in the oil and gas fields were obviously higher than those in the contrast areas.The clear relationship among the concentration of brGDGTs,the distribution of oil and gas fields,and the acidolysis hydrocarbon(ethane)indicates that the concentration effectively responds to hydrocarbon seeps from the oil and gas field below.brGDGTs may become some of the most important indicators in surface geochemical prospecting for oil and gas.
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| 关 键 词： | brGDGTs Jiyang depression surface seep geochemical exploration petroleum |
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