Sequence stratigraphy and typical seismic facies in one exploration block of Bengal Fan
Online published: 2010-06-15
The study area is located in the deep-water area,with water depth beneath 2 000 m,so it is dificult to recognize the sequence boundary with the seismic termination.Based on sequence stratigraphy theory,seismic facies combining with seismic attribute and~equency division are applied to carry out the sequence stratigraphy division and deposition identification.According to the amplitude characteristics of deep water sedimentary cycles on seismic profiles,the sequence boundaries are identified.LST and T-HST developed in each third-order sequence. Characteristics of the seismic facies and the sedimentary facies are analyzed in the equitime sequence framework. Referred to the sedimentary facies model in the deep water,and integrated with the external configuration and the localization of the five typical seismic facies,it is regarded that the U-shaped facies, dome-shaped facies,parallel seismic facies with high amplitude,parallel seismic facies with mid-low amplitude and tran sparent and chaotic reflecting facies glee respectively on behalf of incised channel,channel-levee complex, turbidite lobes,deep-water mudstone and mass-transport deposits.The distribution characteristics of the typical seismic facies are helpful to the recognition of the sequence boundaries.
ZHANG Yukun , WANG Weiying , ZHOU Jiangjiang . Sequence stratigraphy and typical seismic facies in one exploration block of Bengal Fan[J]. Lithologic Reservoirs, 2010 , 22(2) : 69 -73 . DOI: 10.3969/j.issn.1673-8926.2010.02.012
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