Types and Evolution of the Miocene Reefs Based on Seismic Data in the Beikang Basin, South China Sea

被引:0
作者
Yang, Zhen [1 ]
Fan, Guozhang [2 ]
Yan, Wei [1 ,3 ,4 ]
Wang, Xuefeng [2 ]
Zhang, Guoqing [1 ,3 ,4 ]
Yang, Zhili [2 ]
Zhu, Zuofei [1 ,3 ,4 ]
Zhang, Yuanze [2 ]
Cheng, Huai [1 ,3 ,4 ]
Tian, Hongxun [2 ]
Li, Li [2 ]
Zhang, Qiang [2 ]
机构
[1] Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
[2] PetroChina Hangzhou Res Inst Geol, Hangzhou 310023, Peoples R China
[3] Guangzhou Marine Geol Survey, Sanya Inst South China Sea Geol, Sanya 572025, Peoples R China
[4] China Geol Survey, Acad South China Sea Geol Sci, Sanya 572025, Peoples R China
关键词
South China Sea; Beikang Basin; Middle Miocene; reef types; controlling factor; XISHA CARBONATE PLATFORMS; OFFSHORE SARAWAK; BUILDUPS; HISTORY; STRATIGRAPHY; ARCHITECTURE; PALAWAN; LUCONIA; FIELD;
D O I
10.3390/jmse12020360
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
During the Miocene, several reefs formed in the Beikang Basin, South China Sea, which may be potential targets for hydrocarbon exploration. This is due to the environment that developed as a result of the collision, splitting, and splicing of the Nansha Block, which was influenced by the Neogene expansion of the area. However, studies on the types, distribution, controlling factors, and evolution stages of these reefs are scarce. In this study, we used high-resolution seismic data and extensive well-drilling records to gain insights into the evolution of reefs in this particular area. Six distinct types of reefs, namely, the point reef, the platform-edge reef, the block reef, the bedded reef, the pinnacle reef, and the atoll reef, were identified based on our data. These reefs underwent four stages of development. During the initial stage, a few small-sized point reefs emerged in the basin and experienced significant growth during the early Middle Miocene. In the flourishing stage, the reefs predominantly thrived around the Central Uplift and Eastern Uplift areas. In the recession stage, the reefs began to deteriorate during the late Middle Miocene period as a result of the rapid increase in relative sea level caused by tectonic subsidence. In the submerged stage, since the Late Miocene, as the relative sea level continued to rise steadily over time, many reefs that had previously flourished surrounding the Central Uplift and Eastern Uplift areas became submerged underwater, with only a handful of atoll reefs surviving near islands located on the Eastern Uplift. This study indicated the presence of a significant number of well-preserved reefs in the Beikang Basin that have experienced minimal subsequent diagenesis and therefore exhibit high potential as reservoirs for oil and gas exploration.
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页数:17
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