Sonde Resources has completed drilling and testing operations on its Zarat North-1 appraisal well in the 7th of November Block offshore Tunisia/Libya. The well was vertically drilled to a depth of 9,728 feet (2,965 meters), encountering 240 net feet (73 net meters) of pay in the Eocene El Gueria limestone. The well was cased to total depth, and three production tests were performed through 2 ¼-inch diameter test string, from 42 feet to 177 feet (13 to 54 meters) above the water contact.
All three tests flowed substantial quantities of gas and condensate, with test 2 observing sustained rates of about 750 barrels of condensate and 8 MMcf/d of natural gas, and peak condensate rates as high as 1,100 barrels per day. Tests 1 and 3 observed sustained rates of about 600 barrels of condensate per day and gas ranging from 8 to 11.5 MMcf/d. All tests produced water, including both drilling fluids and formation water. Water decreased and oil increased throughout the tests, stated the operator. Data was gathered and is currently being assessed.
The well confirms a significant extension to the previously-proven accumulation, and suggests that an economically-viable, near-term development is possible. Zarat North-1 was temporarily abandoned.
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