Project details

QCCSRC Subproject 1.1: Impact of the environment of deposition and early diagenesis on the fracture potential of Lower Cretaceous carbonate rocks, Haushi-Huqf High, Oman

This project is an integral part of the Qatar Carbonates and Carbon Storage Research Centre (QCCSRC), and is financed by Qatar Petroleum, Shell, and the Qatar Science and Technology Park. 

The hypothesis to be tested  is wether and to what extent the depositional environment of Lower Cretaceous carbonate platforms controls rock texture and the potential for early diagenesis, and the impacts of the above parameters on the fracture potential of a given rock during early burial.

Once fractures are created, we hypothesis that they will channelize diagenetic fluid flow, and that diagenesis will be preferentially focused around the fractures.The project is relevant to the oil and gas industry in Qatar as both fractures and diagenesis impact on reservoir quality.A better understanding of these fundamental processes will therefore improve subsurface predictions in Qatar.

Because we are interested in burial fractures, the outcrops were selected as far away as possible from the main deformation front of the Oman Mountains. We work  in south Central Oman, in the desert region of the Haushi-Huqf. Initial results have pointed out that lateral variabilities in facies exist: tidal flats are for instance laterally extensive, but are cross-cut by tidal channels, while some shoal deposits and dolomitized beds pinch out laterally. Fracture density seems to be largely a function of depositional facies.

This project forms the basis for Ms Claire Nunes Harrington Sena's PhD study, and the PIs are Dr. C├ędric John and Prof John Cosgrove.

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