| 辽河盆地黄沙坨油田原油中氦同位素的来源及其地质意义 |
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| 关键词:crude oil noble gas isotopic characteristics Huangshatuo oilfield Liaohe basin |
| 基金项目:由国家自然科学基金项目(编号: 40472971)及973项目(编号: 2006CB202305)资助 |
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| Sources and Geological Significance of 3He/4He Ratios of Crude Oils from the Huangshatuo Oilfield in Liaohe Basin |
| Based on analyses of He, Ne and Ar isotopes of crude oil samples from the Liaohe Basin, the authors have reached the following conclusions: ①the 3He/4He(Rc) values of the crude oil samples in the study area are distributed in the range of 2.61?10?6?3.50×10?6, with an average of 3.06×10?6 and in an order of 10?6, showing characteristics of the mantle-derived H elium input, whereas the percentages of the mantle-derived helium are dis-tributed between 20.13% and 30.24%, showing the existence of deep faults that cut into the mantle in the study area; ②the geothermal flow values calculated based on 3He/4He ratios range from 75.3 to 77.3 mW/m2, with an average of 6.4 mW/m2, which is higher than the average values of the basins in central and western China, and such a condition is beneficial for the generation of hydrocarbon; ③the above results show that the application of the research method of 3He/4He values in crude oil can provide much information for inferring the sources of natu-ral gas and oil, the tectonic backgrounds and the geothermal flow values |
| SONG Cheng-peng,ZHANG Xiao-bao,MA Su-ping.2009.Sources and Geological Significance of 3He/4He Ratios of Crude Oils from the Huangshatuo Oilfield in Liaohe Basin[J].Acta Geoscientica Sinica,30(2):221-226. |
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