Research project

Project fact sheet

Depositional heterogeneities of a Lower to Mid Jurassic carbonate ramp (Ras-Al-Khaima, UAE)

Project researcher(s): 
Martin R. Hönig
Project supervisor(s): 
Dr Cédric M. John
October, 2012 - July, 2016

In the Middle East, some of the most productive oil reservoirs are located in carbonate sequences from the Jurassic period. The Arabian platform was during the Mesozoic a vast shallow-water epicontinal sea located close to the paleo-equator and covered in extensive "epeiric" carbonate platforms or ramps.

Although much is known about Middle Eastern carbonate reservoirs, detailed architectures and sedimentologic complexity at the interwell scale (<1 km) are still poorly defined. For instance, are reservoirs units such as oolitic grainshoals always connected at the interwell scale, how do bed-by-bed correlations between wells work, and are there any heterogeneities present in reservoir rocks that have been so far overlooked but could impact production scenarios during CCS or EOR operations?

To answer these questions, we work on excellent reservoir analogues in the Emirat of Ras-Al-Khaima, focusing on Lower to Middle Jurassic outcrops that can be continuously traced for >1 km. The goals of our study include a better understanding of the depositional context of these Jurassic sequences, a quantitative estimate of the geometry of significant geobodies within the carbonate sequence, and better constraints on the timing of deposition through the use of chemostratigraphy combined with existing biostratigraphic constraints.