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dc.contributor.authorWang, Jiahaoen_NZ
dc.contributor.authorGuan, Zhenliangen_NZ
dc.contributor.authorLa Croix, Andrew D.en_NZ
dc.contributor.authorWang, Qingkuien_NZ
dc.contributor.authorJi, Lingen_NZ
dc.contributor.authorSun, Jianen_NZ
dc.date.accessioned2020
dc.date.accessioned2020-07-14T23:09:10Z
dc.date.available2020
dc.date.available2020-07-14T23:09:10Z
dc.date.issued2020en_NZ
dc.date.issued
dc.identifier.citationWang, J., Guan, Z., La Croix, A. D., Wang, Q., Ji, L., & Sun, J. (2020). Seismic geomorphology of shallow-water lacustrine deltas in the Paleocene Huanghua Depression, Bohai Bay Basin, eastern China. Marine and Petroleum Geology, 120. https://doi.org/10.1016/j.marpetgeo.2020.104561en
dc.identifier.issn0264-8172en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/13674
dc.description.abstractThe most important sedimentary facies comprising shallow-water lacustrine deltas are distributary channels, and these form abundant ribbon-shaped sand bodies that are excellent petroleum reservoirs. However, distributary channel sandstones are notoriously difficult to correlate and characterize in the subsurface based on well data alone. Here, we show how seismic geomorphology can be used to map lacustrine deltaic sedimentary successions in the First Member of the Kongdian Formation within the Zilaitun Oilfield, Huanghua Depression (China). Using core and wireline logs, this study identified distributary channels as the dominant sedimentary facies. Together with mottled gray-green or maroon mudstones and locally shingled progradational seismic reflection architecture, this indicates that deltas were built in a weakly-oxidized shallow-water lacustrine environment. Next, core observations were linked to seismic data to produce a successive series of stratal slices and root mean square amplitude attribute (RMSAA) maps. The RMSAA maps allowed distributary channel, mouth bar, and beach bar facies to be identified and mapped across the study area. Two patterns of distributary channels emerged from the data: (1) a distributive pattern with a lower concentration of distributary channels; and, (2) an anastomosing deltaic pattern with a high concentration of bifurcated distributary channels. Based on the seismic geomorphological analysis we show that the succession records three phases of delta evolution - retrogradation, aggradation, and progradation - which combine to form 3rd-order sequences. From a petroleum reservoir point of view, the distributive pattern yields narrower, thicker, and less connected sand bodies than the anastomosing pattern. This is consistent with observations from modern shallow-water lacustrine delta systems, providing independent support for the interpretation and highlighting the effectiveness of using seismic geomorphology.en_NZ
dc.language.isoen
dc.publisherElsevieren_NZ
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0264817220303445?via%3Dihuben_NZ
dc.rightsThis is an author's accepted version of an article published in Marine and Petroleum Geology. © 2020 Elsevier
dc.subjectSeismic geomorphologyen_NZ
dc.subjectShallow-water lacustrine deltaen_NZ
dc.subjectDistributary channelen_NZ
dc.subjectSeismic stratal sliceen_NZ
dc.subjectRoot mean square attribute mapen_NZ
dc.titleSeismic geomorphology of shallow-water lacustrine deltas in the Paleocene Huanghua Depression, Bohai Bay Basin, eastern Chinaen_NZ
dc.typeJournal Article
dc.identifier.doi10.1016/j.marpetgeo.2020.104561en_NZ
dc.relation.isPartOfMarine and Petroleum Geologyen_NZ
pubs.elements-id255036
pubs.publication-statusAccepteden_NZ
pubs.volume120en_NZ
uow.identifier.article-no104561


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