oa Application of a Novel Gas Single-Well Tracer Test to Determine Remaining Oil in Gas Flooded Reservoirs

An approach have been tested to obtain a reservoir estimate of residual oil saturation after gas injection. The methodology is similar to the weIl-known Single-Well Tracer Test that has been used to measure water flood residual oil saturation in-sits in more than 200 field trials since 1968. The gas tracer test was performed at the Oseberg Field, well 30/9-B-03. The actual formation had been gas flooded and was assumed to be at residual oil saturation.