Better-quality Late Miocene globigerinid sand reservoirs in the Madura Straits (Oyong and Maleo fields), offshore Indonesia, occur as bedded stacked gully-fill deposits (internalites) in depositional sweet-spots focused by submarine gully backflow sand thicks, within the wave-reworked (deepwater swash) zones on the upper slope and outer platform. Isotopic analysis shows that post-depositional alteration is minimal.
These gullied and channelled globigerinid sand bodies (internalite deposits) are seismically resolvable and cut into bed-parallel sandy slope-parallel reflectors. This signature indicates regions where internal-wave orbitals and swash zones intersected the carbonate slope south of the Madura Ridge (water depths ≈100-300m). It gives a new exploration paradigm.
Study of core and outcrops in the Dallol region of the Danakhil depression, Ethiopia, shows the complexity of potash minerals and their alteration. Previous work failed to differentiate the three main stages and styles of potash precipitation; 1) Primary kainitite associations in the primary textured subaqueous succession, 2) Secondary sylvinite in basin margin phreatic interfaces and 3) Hydrothermal sylvinite associated with geothermally-driven fluids and hydrothermal karst breakouts across the uplifted region in the vicinity of the Dallol Mound.
Integration of FMI and CAST image logs with conventional wireline-derived mineralogy is used to characterise the halokinetic Bitter Springs evaporites (and equivalents) atop the main regional thrust level.
A new model was constructed from kinetic and tectonic textures that redefines the timing and nature of the anhydrite and halite levels across much of the basin.
A comprehensive study of the depositional, diagenetic and halokinetic controls in carbonate-sliver reservoirs, encased in the Ara Salt, in the South Oman Salt Basin
Dr Warren is the principal expert and technical coordinator for Saltworks. His career spans more than 30 years in salty systems. Currently, he splits his time between various projects within SaltWork Consultancy Pte Ltd. and teaching/research commitments at Chulalongkorn University, Bangkok, Thailand. His interests encompass; Wireline Analysis, Carbonate and Evaporite Systems, Economic Geology and Potash exploration and development. To date, he has written four books on economic aspects of these topics, he has contributed chapters covering these topics in a number of books and has published more than 60 scientific articles.Resume