Structural evolution of shale diapirs from reactive rise to mud volcanism: 3D seismic data the Baram delta, offshore Brunei Darussalam

From: Journal of the Geological Society | Date: May 1, 1999| Author: | Copyright information

Abstract: Two areas of shale diapirism in a deltaic setting were examined using 3D seismic data from offshore Brunei to determine the origin, evolution and geometry of shale diapirs. The study areas cover parts of the Egret and Ampa fields within the Baram Delta province. The Ampa diapir consists of a small bulge of the mobile Setap shale around which lies a zone of chaotically disrupted country-rock reflections. At the crest of this chaotic zone, vertical, cylindrical shale pipes arise that end in a wider head. The diapir heads wear halos of high amplitude reflections, probably due to the ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Shale tectonics and deformation associated with active diapirism: The Jerudong anticline, Brunei Darussalam
; ...Observations of the processes of shale diapirism in outcrop have largely...world's largest fields of shale diapirs and mud volcanoes in a sedimentary...many subsurface studies of shale diapirs in deltaic settings based...significant process in feeding shale diapirs ...
PROFILE - Gulf of Paria East Area
; ...late Miocene source. Trap Types: Neogene thrust anticlines; shallow stratigraphic traps; stratigraphic pinchouts against shale diapirs; structural and stratigraphic traps in Neogene half-grabens. Critical Factors: Reservoir predictability. Nearby Petroleum...