oa Integrated Reservoir Characterization in from Unconventional, Low-Permeability Carbonate Reservoir, Abu Dhabi, United Arab Emirates

As the era of 'easy’ oil draws to a close, the energy sector is shifting focus towards previously<br>overlooked, unconventional, 'challenged' reservoirs. Unconventional reservoirs will play a vital role in<br>filling the void as existing, conventional assets move into maturity and irreversible decline. In Abu<br>Dhabi, low permeability carbonate reservoirs contain enormous volumes of hydrocarbon resource with<br>substantial potential to replace a large wedge of the current production steam lost to standard reservoir decline.<br>Reservoir characterization in these assets is a challenge as key static and dynamic information can be<br>difficult to collect and difficult to interpret using traditional methods stand alone. The key to robust<br>reservoir characterization relies on the integration and reconciliation of various forms of static and<br>dynamic data. A comprehensive, mid-appraisal characterization of reservoir quality, vertical<br>communication and lateral compartmentalization of a multi-billion barrel asset in Abu Dhabi was<br>completed using seismic, wireline, core, pressure, fluid property and capillary pressure information.<br>This presentation will focus on the methodology and results of this study and illustrate the gains in<br>basic reservoir understanding, the identification of critical information gaps to be filled prior to<br>generating a robust full-field development plan for this reservoir, and how these identified gaps are<br>used to drive future appraisal efforts.