BG Group has reported that its appraisal of its Pweza gas field offshore Tanzania has been successfully completed and “excellent reservoir quality” has been confirmed.
BG said it had finished a drill-stem test on the Pweza-3 well that confirmed both the excellent properties of the Tertiary-section reservoir, including flow and connectivity, while also confirming the firm's understanding and modeling of the field's geology.
BG carried out a drill-stem tests and Tanzania's offshore Block 4 flowed at a maximum rate of 57 million standard cubic feet of gas per day, constrained by equipment. BG said the test also showed that development wells could flow at significantly higher rates and that the Pweza reservoir is "potentially the most prolific in BG Group's Tanzania portfolio".
The energy industry in Tanzania shows much promise as deepwater drilling and 3D seismic mapping techniques have allowed geologists to find the hydrocarbons that were missed when the area was searched for reserves back in the 1950s and 1960s. In the past three years, companies such as Ophir Energy, Shell and Statoil have discovered a set of large offshore natural gas fields, putting Tanzania on the global energy map.