AGIP drilled the discovery well, Mnazi Bay-1, in l982. The well encountered commercial quantities of gas in two Oligocene sands within the Mnazi Bay Clay Formation. These sands have porosities of 15 to 25% and permeabilities up to 560 md. Drill stem tests produced flows of 3.5 x 105 m 3 / day (12.5 MMCF/d). Based on one well and existing seismic coverage, the reserves at Mnazi Bay are estimated to be in the 1 TCF range. The gas is considered thermogenic but no source identification has been made.