Double provenance depositional model and exploration prospect in the deep-water area of Qiongdongnan Basin

G, Yao; Shen, Yuan; Wu, Shiguo; Zhong, Chuang

doi:10.1016/s1876-3804(09)60101-4

Cited by 44 publications

(38 citation statements)

References 3 publications

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“…1). Since the Eocene, the study area has had a dual provenance, the southwest Vietnam Uplift and the South China block, and the Vietnam Uplift provenance were dominant in the south slope of the Qiongdongnan Basin since the Neogene (Yao et al, 2008).…”

Section: Geological Settingmentioning

confidence: 99%

Polygonal faults and their implications for hydrocarbon reservoirs in the southern Qiongdongnan Basin, South China Sea

Sun

Lü³

et al. 2010

Journal of Asian Earth Sciences

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Section: Geological Settingmentioning

confidence: 99%

Polygonal faults and their implications for hydrocarbon reservoirs in the southern Qiongdongnan Basin, South China Sea

Sun

Lü³

et al. 2010

Journal of Asian Earth Sciences

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“…2). The study area partly entered a bathyal environment in the Early Miocene (after T50; Yao et al, 2008). From then on, fine-grained sediments deposited.…”

Section: Geological Settingmentioning

confidence: 99%

Characteristics and formation mechanism of polygonal faults in Qiongdongnan Basin, northern South China Sea

Sun

G³

et al. 2009

J. Earth Sci.

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Based on high-resolution 3D seismic data, we document the polygonal faults within the Miocene Meishan (梅山) Formation and Huangliu (黄流) Formation of the Qiongdongnan (琼东南) basin, northern South China Sea. Within the seismic section and time coherent slice, densely distributed extensional faults with small throw and polygonal shape were identified in map view. The orientation of the polygonal faults is almost isotropic, indicating a non-tectonic origin. The deformation is clearly layer-bounded, with horizontal extension of 11.2% to 16%, and 13.2% on average. The distribution of polygonal faults shows a negative correlation with that of gas chimneys. The development of polygonal faults may be triggered by over-pressure pore fluid which is restricted in the fine-grained sediments of bathyal facies when the sediments is compacted by the burden above. The polygonal faults developed to balance the volumetric contraction and restricted extension. The product of hydrocarbon in the Meishan Formation may have contributed to the development of the polygonal faults. In the study area, it was thought that the petroleum system of the Neogene post-rift sequence is disadvantageous because of poor migration pathway. However, the discovery of polygonal faults in the Miocene strata, which may play an important role on the fluid migration, may change this view. A new model of the petroleum system for the study area is proposed.

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“…This reservoir type is the main target in the shelf basin (Liu et al, 2007). It has a complex source both from the South China mainland and Indochina peninsula and Yongle uplift in the deepwater of the Qiongdongnan basin during the Early Miocene (Yao et al, 2008). A large Upper Oligocene delta front and subaqueous fan sandstone were developed in the Zhuhai Formation of the Baiyun sag and in the Yacheng Formation of the Qiongdongnan basin.…”

Section: Reservoirsmentioning

confidence: 99%

Petroleum system in deepwater basins of the northern South China Sea

Han

et al. 2009

J. Earth Sci.

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The northern South China Sea margin has experienced a rifting stage and a post-rifting stage during the Cenozoic. In the rifting stage, the margin received lacustrine and shallow marine facies sediments. In the post-rifting thermal subsidence, the margin accumulated shallow marine facies and hemipelagic deposits, and the deepwater basins formed. Petroleum systems of deepwater setting have been imaged from seismic data and drill wells. Two kinds of source rocks including Paleogene lacustrine black shale and Oligocene-Early Miocene mudstone were developed in the deepwater basin of the South China Sea. The deepwater reservoirs are characterized by the deep sea channel fill, mass flow complexes and drowned reef carbonate platform. Profitable capping rocks on the top are mudstones with huge thickness in the post-rifting stage. Meanwhile, the faults developed during the rifting stage provide a migration path favourable for the formation of reservoirs. The analysis of seismic and drilling data suggests that the joint structural and stratigraphic traps could form giant hydrocarbon fields and hydrocarbon reservoirs including syn-rifting graben subaqueous delta, deepwater submarine fan sandstone and reef carbonate reservoirs. KEY WORDS: deepwater reservoir, source rock, petroleum system, northern South China Sea.

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Double provenance depositional model and exploration prospect in the deep-water area of Qiongdongnan Basin

Cited by 44 publications

References 3 publications

Polygonal faults and their implications for hydrocarbon reservoirs in the southern Qiongdongnan Basin, South China Sea

Polygonal faults and their implications for hydrocarbon reservoirs in the southern Qiongdongnan Basin, South China Sea

Characteristics and formation mechanism of polygonal faults in Qiongdongnan Basin, northern South China Sea

Petroleum system in deepwater basins of the northern South China Sea

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