TDT monitors gas saturation in heterogeneous reservoir

Gharib M. Hamada, Musaed N.J. Al-AwadKing Saud University Riyadh, Saudi Arabia Thermal decay time (TDT) logs were used for determining the gas/oil contact in wells in the Zeit Bay field in Egypt. Gas/oil contact in the field was revised using the results from the model that was developed. This revision led to an accurate definition of the oil leg and to the drilling of three additional wells in the field. The analysis was based on more than 70 TDT (thermal decay time) runs, open hole logs, pressure data from 12 infill wells, and production records from all Zeit Bay wells. The analysis followed the Polyachenko model of functional relationship between count rates an...

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