Stratigraphic forward modelling of Upper Kharaib ooid shoal migration in Ras Al-Khaimah using CarboCAT
D.P Gold, H Xi, C. Gill and P.M Burgess
Event name: First EAGE Reservoir Characterization and Modelling Workflows for Giant Carbonate Field Developments of the Middle East
Session: Outcrop Analogues to define geobodies for the subsurface
Publication date: 18 February 2019
Info: Abstract, PDF ( 385.34Kb )
The Early Cretaceous Kharaib Formation contains important carbonate reservoir facies in the United Arab Emirates . The Upper Kharaib Reservoir Unit comprises highly permeable reservoir facies that include ooid grainstones and rudist floatstones to rudstones. The ooid grainstone facies occur within low angle progradational clinoforms formed by ooid shoal migration and are exposed in outcrops along Wadi Rahabah in Ras Al-Khaimah . Often the progradational patterns of these clinoforms are not visible in core data, however observations from outcrops in Ras Al-Khaimah can be used to build realistic stratigraphic forward models to better understand the development of the Upper Kharaib Reservoir Unit. Stratigraphic, sedimentological and palaeoenvironmental interpretations made from the Ras Al-Khaimah outcrops were used to build a deterministic stratigraphic forward model of the Upper Kharaib clinoforms using CarboCAT. The CarboCAT stratigraphic forward model of the Ras Al-Khaimah clinoforms successfully replicates ooid shoals which are sigmoid in shape and comprise transported material that prograde towards the basin centre over a period of 500 Ky.