Reserves
Gas-in-place
PEL 238 (ESG 65% & Santos 35%), the main focus of ESG’s current development programme, has been independently estimated to contain up to 17 Tcf of Coal Seam Gas within the two thickest coal seams, a substantial percentage of which is expected to be producible.
The gas-in-place potential of PEL 433 and PEL 434 is presently difficult to estimate owing to the limited extent of exploration activity carried out to date.
Certified Reserves and Contingent Resources
CSG reserves on PEL238 (ESG 65% & Santos 35%), determined by Mr Dan Paul Smith and Mr John Hattner of Netherland, Sewell and Associates Inc, Dallas, Texas, USA, in accordance with Petroleum Resource Management System guidelines, are as follows:
PEL 238 Certified Gas Reserves (100%)
1P |
2P |
3P |
115 PJ |
1520 PJ |
2,797 PJ |
PEL 238 Certified Contingent Resources (100%)
1C |
2C |
3C |
1,243 PJ |
3,515 PJ |
6,215 PJ |
PEL 238 Reserves and Contingent Resources History (100%)
PJ |
1P |
2P |
3P |
1C |
2C |
3C |
Sep 07 |
21 |
59 |
– |
– |
– |
– |
Dec 07 |
21 |
185 |
1,300 |
– |
– |
– |
Sep 08 |
21 |
336 |
1,300 |
– |
– |
– |
Dec 08 |
21 |
336 |
1,300 |
1,195 |
3,053 |
6,128 |
Jun 09 |
33 |
602 |
1,959 |
1,195 |
3,053 |
6,128 |
Dec 09 |
115 |
1,520 |
2,797 |
1,243 |
3,515 |
6,215 |
(65% of the tabulated reserves and resources are attributable to ESG)
Narrabri CSG Project - Gas Reserves Upgrade Program
Outstanding results have been achieved so far from the 2008/09 Reserves Upgrade Program. Dewhurst Coreholes are already contributing to certified reserves demonstrating total coal thickness of 33.5m to 42.5m and Bohena Seam thickness 16.2m to 21.7m. Edgeroi Corehole results confirmed permit-wide development of thick, gas saturated coal.
