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| The application of supercritical CO2 extraction technology to surface oil and gas geochemical exploration |
| NING Li-Rong, SUN Chang-Qing, RONG Fa-Zhun, YANG Fan, LU Li |
| Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi 214151, China |
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Abstract Using supercritical CO2 fluid extraction technology for the extraction of polycyclic aromatic hydrocarbons from oil and gas geochemical exploration samples and using fluorescence spectrometer to conduct verification show that the repeatability and stability are relatively satisfactory with RSD less than 5%. Compared with conventional geochemical cold extraction method, this technology shows obvious advantages. Following the analysis of data obtained by supercritical CO2 extraction technology in Nanyang N65 well profile and a comparison with the geochemical exploration indexes such as headspace light hydrocarbon and acid-extraction hydrocarbon (SAEH), the authors carried out surface geochemical exploration in the Black Dragon Temple in Nanyang depression area, and found that the supercritical carbon dioxide technology would be helpful to the delineation of accumulation areas for oil and gas.
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Received: 05 September 2016
Published: 20 October 2017
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