Wentworth Resources Limited provided an update on its assessment of the Ziwani-1 well test, located in the Mnazi Bay Concession, Tanzania. The Ziwani-1 well was spudded on February 1, 2012 and drilled to a final total depth of 8,763 feet (2,671 meters). The gas bearing zone between 3,629 and 3,638 feet (1,106 and 1,109 meters) has now been tested using drill stem equipment. The zone flowed gas at an unstable rate of up to 7.2 million standard cubic feet per day at a well head pressure of up to 973 psi on a choke of 36/64".
The tested zone is a new reservoir interval, not previously encountered in the Mnazi Bay Block. The reservoir is a clean limestone of Pliocene age 11.5 (3.5 meters) thick with 17 percent porosity and 78 percent hydrocarbon saturation. However, analysis of the test data indicates that the potential resource volumes of the well are sub-commercial and the well has therefore been plugged and abandoned.