Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Reconstruction of the Tectonic Evolution of the North Song Hong Basin Offshore Area in Vietnam Based on Seismic Interpretation


Affiliations
1 Department of Geophysics, 397 Panama Hall, Stanford University, CA 94305, United States
2 Department of Civil and Earth Resource Engineering, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan
     

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The Song Hong (Red River) Basin is a typical pull-apart basin in Southeast Asia, located in northern Vietnam, extending from onshore to the offshore Gulf of Tonkin. It was formed by the Red River Fault displacement and South China Sea opening, and can be divided into three main parts due to stratigraphic distribution: onshore, northern offshore area and southern offshore area. This basin is considered to have a high potential for hydrocarbons, but only some gas fields have been found to date. In this study, we reinterpreted two-dimensional seismic data from the north Song Hong Basin to build structural maps of the study area. Reconstruction of the tectonic evolution of some typical sections illustrates the structural configuration and especially development of the fault system in the area. The newest results of re-interpretation reveal many flower structures and evidence for the right lateral displacement on the Red River fault after 5.5 Ma, unreported in previous works. This can be used to explain the complex structure of Song Hong Basin and suggests the reason why exploration for hydrocarbon traps is very difficult.

Keywords

Tectonic Evolution, Seismic Interpretation, Hydrocarbon Traps, Basement High, Flower Structures, Song Hong Basin, Vietnam.
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  • Reconstruction of the Tectonic Evolution of the North Song Hong Basin Offshore Area in Vietnam Based on Seismic Interpretation

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Authors

Huyen T. T. Bui
Department of Geophysics, 397 Panama Hall, Stanford University, CA 94305, United States
Y. Yamada
Department of Civil and Earth Resource Engineering, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan
T. Matsuoka
Department of Civil and Earth Resource Engineering, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan

Abstract


The Song Hong (Red River) Basin is a typical pull-apart basin in Southeast Asia, located in northern Vietnam, extending from onshore to the offshore Gulf of Tonkin. It was formed by the Red River Fault displacement and South China Sea opening, and can be divided into three main parts due to stratigraphic distribution: onshore, northern offshore area and southern offshore area. This basin is considered to have a high potential for hydrocarbons, but only some gas fields have been found to date. In this study, we reinterpreted two-dimensional seismic data from the north Song Hong Basin to build structural maps of the study area. Reconstruction of the tectonic evolution of some typical sections illustrates the structural configuration and especially development of the fault system in the area. The newest results of re-interpretation reveal many flower structures and evidence for the right lateral displacement on the Red River fault after 5.5 Ma, unreported in previous works. This can be used to explain the complex structure of Song Hong Basin and suggests the reason why exploration for hydrocarbon traps is very difficult.

Keywords


Tectonic Evolution, Seismic Interpretation, Hydrocarbon Traps, Basement High, Flower Structures, Song Hong Basin, Vietnam.