Research project

Project fact sheet

Fault-related dolomitization in Oman

Project researcher(s): 
Dr Veerle Vandeginste
Project supervisor(s): 
Dr Cédric M. John
Project supervisor(s): 
Professor John Cosgrove
Duration: 
September, 2009 - January, 2013
Funding

 

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.  

Dolomitization is one of the most important post-depositional diagenetic transformation affecting carbonate rocks. About 50% of oil and gas reservoirs in the world occur in carbonate rocks, 50% of which have been affected to some degree by dolomitization.

Dolomitization associated with faults in the subsurface is one of the most important porosity and permeability modifiers, and can pose some serious problems during production of carbonate reservoirs or during drilling operations. Hence, understanding the processes leading to dolomite bodies along fault and the spacial distribution of these dolomite bodies is of direct relevance to the oil and gas industry.

Our project is centered on the study of deep-sited dolomitization along faults, in the Jebel Akhdar area of the Oman Mountains. In this region excellent outcrops of late-diagenetic dolomite, hosted in Precambrian, Permo-Triassic and Jurassic limestones provide a unique opportunity to study this process and establish whether or not it represents an analogue for similar processes in the subsurface. The origin of the dolomite will be investigated using both geochemistry and geometric relationships, and the structural setting of the fault-related dolomite bodies will be investigated through a fracture analysis.

Dr. Vandeginste is the principal investigator on this project and it represents the main effort of her post doctoral research.Dr. Cédric John is the primary supervisor for this project which is done in collaboration with Prof John Cosgrove, a structural geologist at Imperial College London.

Associated peer-reviewed publications: