气候变化领域集成服务门户(CCPortal): Interaction between sea-level changes and depositional tectonics: Implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria

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DOI	10.1306/05091918077
	Interaction between sea-level changes and depositional tectonics: Implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria
	Ogbe O.B.; Orajaka I.P.; Osokpor J.; Omeru T.; Okunuwadje S.E.
发表日期	2020
ISSN	0149-1423
起始页码	477
结束页码	505
卷号	104 期号:3
英文摘要	This paper presents the potential depositional framework of sandstones and unconsolidated sand reservoirs, seals, and traps in the western part of the coastal swamp depobelt of the NigerDelta Basin, Nigeria, through integration of sequence stratigraphy and seismic imaging. The integration of well logs and biostratigraphic (foraminifera and palynological) data with three-dimensional seismic volume established the sequence stratigraphic framework, which has improved our understanding of the impact of sea-level changes in the distribution of sand facies. Four thirdorder seismic depositional sequences (sequences 1-4) of Serravallian deposits were identified based on the Vail stratigraphic concept. Depositional processes, structures, thickness, and seismic signatures vary in each sequence. Sequence 1, dominated by mud and very fine-grained sand facies, represents the outer shelf-shelf margin setting and has experienced shale tectonics (ductile deformation). Sequences 2 and 3 consist of alternating sand-shale facies and have experienced gravitational tectonics. Although sequence 2 represents middle shelf-inner shelf setting, sequence 3 represents inner shelf-transitional setting. Sequence 4 consists of thick fluvial-coastal plain sand facies and represents deltaic plain or continental sediments. These deposits reflect postgravitational tectonics. Within the thirdorder sequences are fourth-order sequences that recorded the interaction between small-scale transgressive-regressive cycles and depositional tectonics. The potential reservoirs within these sequences are stacked channel sandstones, shoreface sandstones, and heteroliths. The juxtaposition of the potential reservoirs against transgressive shales provides potential seals and traps. Structural interpretation shows synthetic and antithetic faults. In addition, eventmaps at various ages document structural closures that indicate the existence of possible hydrocarbon leads and prospects. © 2020 The American Association of Petroleum Geologists. All rights reserved.
关键词	Biostratigraphy Deposits Hydrocarbons Petroleum prospecting Sand Sandstone Sea level Seals Seismology Shale Well logging Wetlands Depositional process Depositional sequences Ductile deformations Fourth-order sequences Sequence stratigraphic framework Sequence stratigraphy Structural interpretation Third-order sequences Tectonics hydrocarbon sea level change swamp tectonic evolution Niger Delta Nigeria Foraminifera
语种	英语
来源机构	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131672
推荐引用方式 GB/T 7714	Ogbe O.B.,Orajaka I.P.,Osokpor J.,et al. Interaction between sea-level changes and depositional tectonics: Implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria[J]. AAPG Bulletin,2020,104(3).
APA	Ogbe O.B.,Orajaka I.P.,Osokpor J.,Omeru T.,&Okunuwadje S.E..(2020).Interaction between sea-level changes and depositional tectonics: Implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria.,104(3).
MLA	Ogbe O.B.,et al."Interaction between sea-level changes and depositional tectonics: Implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria".104.3(2020).