Print this pageAAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain
Gas Log Monitoring - Challenges and Uncertainties in Gas Injection Pilot in Carbonate Reservoir - A Case Study in UAE
(1) ED, ADCO, Abu Dhabi, United Arab Emirates.
The field under study is Lower Cretaceous anticline carbonate reservoir in onshore Abu Dhabi, UAE. It is characterized by well developed porosity but low to moderate permeability, occasionally, with high permeability streaks. The field structure is highly faulted; consequently, many reservoir layers are juxtaposed due to faulting which have a significant role in the reservoir’s performance. Pressure maintenance is supported by peripheral water injection. Two gas injection pilot projects are underway to investigate the benefits of gas injection above MMP (Minimum Miscibility Pressure) in the low permeability reservoirs.
As part of the field development a peripheral water injection scheme is in place, and two gas injection pilots were commissioned for injection in the entire reservoir.
The purpose of this work is to:
- present an overview on the implemented strategy for log monitoring in sense of the logging types , logging timing and the interpretation techniques;
- summarize specific actions taken to gather log data;
- discuss and evaluate the field observations; and
- address the challenges and uncertainties of monitoring process.
The results of the monitoring observations in this work are being incorporated into simulation studies for a conclusive assessment of the pilots.