Visualization to Value: Myanmar Deepwater Geomorphology

Abstract

Shell’s acreage spans both the shallow and deepwater untested sections of the Rakhine basin. Since the block award in 2015, in combination with joint venture partners, over 30,000km2 of new broadband 3D seismic has been acquired over this acreage, creating an extraordinary broadband dataset. A variety of seismic attributes will be presented, focusing on those that have been useful to uncover the complexity of the deepwater systems in the Rakhine. Two competing sediment systems are seen, resulting in a complex interplay of deposition. The northerly derived system of Ganges and Brahmaputra origin is seen to be the leading contributor of sediments in the ultra-deepwater of Shell’s northern Rakhine AD2A4 blocks, dominated by massive deepwater features. A distinct second easterly sourced clastic system hypothesized to be of Indo-Burman range origin is seen to dominate the shelfal and toe of slope depocenters of these blocks. The eastern sediments are comprised of considerably smaller sedimentary facies and an abundance of slump features. These two systems are interpreted to be coincidentally active and topographically affecting each other. This competition results in a complex interaction of localized geomorphologies contributing to petroleum system elements. Leveraging the latest technology and visualization techniques, a seismic attribute based deepwater classification scheme will be shared with examples.

AAPG Datapages/Search and Discovery Article #90336 ©2018 AAPG Asia Pacific Region, The 4th AAPG/EAGE/MGS Myanmar Oil and Gas Conference, Myanmar: A Global Oil and Gas Hotspot: Unleashing the Petroleum Systems Potential, Yangon, Myanmar, November 13-15, 2018