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Oil-gas information extraction and prospective area prediction based on hydrocarbon microseepage theory: A case study of Salamat Basin in Central Africa |
Chenchao XIAO1,2, Xiaojuan WU3(), Daming WANG4, Yongbin CHU3 |
1. Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100048, China 2. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083,China 3. College of Resources and Environment, Chengdu University of Information Technology,Chengdu 610225, China 4. China Geological Survey, Beijing 100037, China |
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Abstract Anomaly information caused by hydrocarbon seepage in oil-gas fields can be detected by remote sensing technology. Compared with traditional oil and gas exploration methods,remote sensing technology has many advantages in getting information from long range, large-area mapping, high efficiency and low cost, especially in areas with complex terrain and geomorphological environment. Based on the hydrocarbon microseepage theory, the mineral alteration information such as clays, carbonates, ferrous ion and brightness temperature were respectively extracted by methods of crosstalk correction, atmospheric correction, band ratio, principal component analysis and mono-window algorithm with the ASTER data in Salamat Basin of Central Africa. The results show that the above-mentioned several types of strong mineral alteration information and high temperature anomaly information are mainly distributed in the central and southern part of the study area, namely, the central uplift zone and the southern depression zone are highly likely to contain hydrocarbons. Combined with existing geological, seismic, geophysical and geochemical data, five oil-gas prospecting areas were delineated, which can provide theoretical direction for the further oil-gas exploration.
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Keywords
hydrocarbon microseepage
mineral alteration information
brightness temperature
oil-gas target prediction
ASTER data
Salamat Basin
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Corresponding Authors:
Xiaojuan WU
E-mail: wuxiaojuan@cuit.edu.cn
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Issue Date: 03 December 2019
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