Method comparison for water saturation estimation in shaly sand reservoir for Field X

Abstract

The study is done to find out the impact that shale has upon the estimation of saturation in a clastic reservoir. It is widely acceptable that shaly sand saturation method must be used when dealing with clastic reservoir due to its consideration of shale content in its calculation. Despite knowing that, there are just so many shaly sand saturation methods available in the industry, hence this study is conducted to identify which method is best to represent Field X which located in Malay Basin, Malaysia. A controlled condition is developed to ensure consistency for each of the saturation methods. This was done by fixing a constant input parameter for each of the methods. Apart from that, a referenced saturation log that has been calibrated using core and actual field data is being used as the benchmark for comparison. All calculated saturation will be compared side by side with the referenced log and a complete discussion and analysis is done to identify which method would be best to represent Field X in estimating the water saturation.