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High-resolution sequence stratigraphic division and distribution of tidal deposits in the Zhuhai Formation, Huizhou Sag, Pearl River Mouth Basin, South China Sea

Published online by Cambridge University Press:  24 November 2011

WENBO ZHENG  and
HONGWEN DENG
WENBO ZHENG*
Affiliation:
School of Energy Resources, China University of Geosciences (Beijing), 29 Xueyuan Rd, Beijing 100083, China
HONGWEN DENG
Affiliation:
School of Energy Resources, China University of Geosciences (Beijing), 29 Xueyuan Rd, Beijing 100083, China
*
*Author for correspondence: [email protected]
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Abstract

The Zhuhai Formation of the Huizhou Oilfield has been interpreted as being deposited in a tide-dominated estuarine setting. This paper uses stratigraphic principles, cores and logging data to analyse the facies changes of tidal sedimentation in response to the base level cycle. We conclude that the mud flat progradational allocycle is the result of a long-term base level fall, while the fining-upwards autocycle is in response to a short-term base level fall. Region-wide mud layers of supratidal zones and scour surfaces of subtidal zones are stratigraphic surfaces of tidal sedimentation. By integrating high-resolution stratigraphic correlations with seismic attributes extracted from the stratal slicing of 3-D data volumes, we use an attribute map of RMS (root mean square) amplitude to image the distribution and evolution of tidal deposits in the study area. Intertidal zones and the upper parts of the tidal cycle are favourable areas for prospecting and oil reserves and thus provide a basis for petroleum exploration and development.

Keywords

stratigraphystratal slicingseismic attributetidal depositionZhuhai FormationHuizhou Oilfield
Type
Original Articles
Information
Geological Magazine , Volume 149 , Issue 4 , July 2012 , pp. 722 - 728
Copyright
Copyright © Cambridge University Press 2011

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