Aminex PLC announced the results from deepening the Ntorya-1 exploration well in the Ruvuma Basin onshore in Tanzania.
On February 27, 2012, Aminex reported that a gas discovery had been made in a 82 feet (25 meter) gross sand interval between 8,727 feet and 8,809 feet (2,660 meters and 2,685 meters) with a 9.8 feet (3 meter) net gas bearing pay zone in sandstones having 20 percent porosity at the top and a 54 feet (16.5 meter) thick lower sandstone interval with further possible gas pay.
After running a 7-inch liner to 9,022 feet (2,750 meters), the well was deepened to a final total depth of 10,335 feet (3,150 meters) and wireline logging was carried out. Although encouraging gas readings were recorded over a 984 feet (300 meter) interval from 9,350 feet (2,850 meters) to TD, a deeper target horizon identified on seismic at approximately 9,843 feet (3,000 meters) was found not to have reservoir potential.
The well will now be plugged back to the base of the 7-inch liner and completed for testing the gas pay interval. A test program will be carried out after the rig has been moved off location.
Participants in the Ruvuma PSA are:
Aminex Chief Executive, Stuard Detmer, commented: "With the completion of drilling at Ntorya-1, operations will now focus on testing the previously announced gas discovery between 8,727 feet and 8,809 feet (2,660 meters and 2,685 meters) and planning a seismic program to evaluate the full potential of the discovery and identify other prospects for future drilling. Ntorya-1 has successfully extended onshore the Ruvuma Basin play fairway which has recently been the subject of several high profile offshore discoveries. Aminex sees significant further exploration potential for the Ruvuma block, in particular the offshore portion of the PSA which is largely unexplored."
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