Preliminary results from Cobalt International Energy Inc.’s latest appraisal well at the North Platte prospect in the U.S. Gulf of Mexico show the well hit about 198 m (650 ft) of net oil pay.

Results of drilling operations on the North Platte #4 appraisal well were released Jan. 4.

The company noted that the amount is more than the approximately 168 m (550 ft) found at the North Platte #3 appraisal well.

“The North Platte #4 initial appraisal results also indicate high quality Inboard Lower Tertiary Wilcox reservoirs on the eastern flank of the North Platte field,” according to a Business Wire news release. “Cobalt is currently evaluating log data, fluid samples and pressure information and is preparing for a geologic sidetrack to further analyze the extent of the eastern flank of the field.”

The sidetrack should be finished in first-quarter 2017. Cobalt serves as the operator with a 60% working interest. Partner Total E&P USA Inc. has a 40% working interest.