Tanzania
Production & Reserves
| Gross field GIIP and Reserves (Bcf) McDaniel, end 2009 | Total Proved (1P) | Total Proved + Probable (2P) | Total Proved + Probable + Possible (3P) |
| GIIP | 1,236 | 1,433 | 1,562 |
| Original recoverable | 803 | 998 | 1,207 |
| Remaining recoverable | 689 | 879 | 1,084 |
In accordance with National Instrument 51-101 Standards of Disclosure for Oil and Gas Activities, the independent petroleum engineers, McDaniel and Associates have audited the natural gas reserves of Songo Songo Field. Table 1 details the audited GIIP and reserves on a life of field basis as of 31 December 2009.
Orca’s internal evaluation of the Best (mid) Case GIIP for the gross field is 1,571 Bcf, and for associated gross remaining recoverable reserves as of 31 December 2009 is 1,079 Bcf.
Since the field commenced commercial operations in July 2004 there has been a steady increase in audited reserves that can be attributed to sustained excellent reservoir performance, additional seismic to improve structural mapping, revised depth conversion methodology and information gained from well SS-10 drilled by Orca in 2007 and providing the first comprehensive suite of well data on the field in 25 years.
Under the terms of a Gas Agreement signed in 2001, the Protected Gas (PG) from Songo Songo is 100% owned by TPDC and is sold to Songas Limited (Songas) under a 20 year Gas Agreement. The maximum daily PG volume is approximately 45.1 MMscfd, and is used in turbines 1 – 5 at the Ubungo Power Plant and kilns 1-3 at the Wazo Hill cement plant. Also under the terms of the Gas Agreement, the gas from Songo Songo in excess of the PG is available to Orca and TPDC (the Gas Developers) to be marketed as Additional Gas (AG) and is sold by the Gas Developers to the power sector and industrial customers in Dar es Salaam.