Modelling of hydrocarbon generation in the Cenozoic Song Hong Basin,Vietnam: a highly prospective basin |
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| Affiliation: | 1. Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Hainan Bureau of Geology, Haikou 570206, China;4. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;5. Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada;1. Palynova UK, Littleport, UK;2. Department of Earth Sciences, Royal Holloway, University of London, UK;3. Vietnam Petroleum Institute, Hanoi and Ho Chi Minh City, Viet Nam;4. Total E&P, Asia Pacific Pte. Ltd., Singapore;5. Murphy Oil Company, Ho Chi Minh City, Viet Nam;1. School of Geosciences, China University of Petroleum, Qingdao, Shandong, China;2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China;3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, China;4. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China |
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| Abstract: | The Cenozoic Song Hong Basin, situated on the northern part of the Vietnamese shelf, has been only sporadically explored for hydrocarbons. A review of the results of the exploration efforts so far shows that the distribution of potential source rocks and their time of hydrocarbon generation are the critical risks for finding commercial amounts of hydrocarbons. In the Song Hong Basin, including the Hanoi Trough, the rocks most likely to have source potential are: (1) oil-prone Eocene–Lower Oligocene lacustrine mudstones and coals, (2) oil- and gas-prone Middle Miocene coal beds, (3) gas-prone Upper Oligocene–Lower Miocene coals, and (4) gas- and oil-prone Miocene marine mudstones. To assess the time of hydrocarbon generation from these units, relative to the formation of traps, the generation history was modelled at 32 well and pseudo-well locations. The modelling demonstrates that the two first-mentioned source rock units are especially important. In the northern and northeastern part of the basin and along its western margin traps may have been charged by Eocene–Lower Oligocene source rocks. In the Hanoi Trough, the excellent Middle Miocene coal beds have probably generated hydrocarbons within the last few million years. Thus the huge and still underexplored Song Hong Basin provides attractive areas for further exploration. |
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