Anadarko today announced its seventh well in the discovery area offshore Mozambique successfully appraised previous discoveries at Lagosta and Camarao.
The Lagosta-2 appraisal well, located about 4.4 miles (7 kilometers) north of the Lagosta discovery and 5.3 miles (8.5 kilometers) south of the Camarao well, encountered 777 total net feet (237 meters) of natural gas pay in multiple zones.
“This is the largest pay count of any well in the complex to date, and it seems fitting that our seventh successful well in the discovery area would encounter 777 net feet of pay,” said Bob Daniels, Anadarko Sr. Vice President, Worldwide Exploration.
“These excellent results continue to support our recoverable resource estimates of 15 to 30-plus Tcf (trillion cubic feet) of natural gas in the discovery area on our block, as well as provide additional information that will be incorporated into our models to help determine the optimal subsea development plans for the complex. In addition, a second deepwater drillship, the Deepwater Millennium, has arrived in Mozambique to begin an accelerated testing program that will include installing observation gauges and conducting several drillstem tests, as we remain on track to reach a final investment decision for this project in 2013.”
The Lagosta-2 appraisal well was drilled to a total depth of approximately 14,223 feet (4,335 meters) in water depths of approximately 4,813 feet (1,467 meters) in the Offshore Area 1 of the Rovuma Basin. The partnership plans to preserve the Lagosta-2 well for future utilization during its planned drillstem testing program in the Windjammer, Barquentine and Lagosta complex. Once operations are complete, the Belford Dolphin deepwater drillship will be mobilized to drill the Lagosta-3 appraisal well.
Anadarko is the operator of the 2.6-million-acre Offshore Area 1 with a 36.5-percent working interest. Co-owners in the area are Mitsui E&P Mozambique Area 1, Limited (20 percent), BPRL Ventures Mozambique B.V. (10 percent), Videocon Mozambique Rovuma 1 Limited (10 percent) and Cove Energy Mozambique Rovuma Offshore, Ltd. (8.5 percent). Empresa Nacional de Hidrocarbonetos, E.P.’s 15-percent interest is carried through the exploration phase.
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Bowleven, the West Africa focused oil and gas exploration group traded on AIM, on Friday (October 14) announced the discovery of oil at the Sapele-3 exploration well drilling in the Douala Basin, offshore Cameroon.
Sapele-3 drilling update
The Sapele-3 well is located circa 16 kilometers North West of Sapele-1 and circa thirteen kilometers North West of the D-lr wells. The well is drilling in water depths of approximately 30 meters.
The well was initially designed to target the shallower Miocene play including the reservoir interval previously encountered at Dl-r. Due to optimised well design it has also been possible to deepen the well into what is the Deep Omicron equivalent interval encountered with previous Sapele wells.
Bowleven, as operator, provides updates for the reservoir intervals encountered at Sapele-3 below:
Deep Omicron interval (oil)
The well has encountered 11 meters of independently log evaluated hydrocarbon pay in high quality sandstone reservoirs within the Deep Omicron stratigraphic interval intersected by previous Sapele wells. In addition, a further 24 meters of net sand was encountered, of which up to 11 meters is currently interpreted as having either a high residual hydrocarbon or a hydrocarbon bearing response from logs. Further evaluation to determine whether this is pay or not is pending.
Wireline logs indicate that the majority of reservoir has been encountered within two distinct packages within the upper part of the Deep Omicron interval that can be correlated to the earlier Sapele discovery wells. The logs also indicate high net to gross ratios through these packages.
As the well is only two thirds of the way through the Deep Omicron interval and has encountered excellent quality oil bearing reservoir at current total depth (TD), the intention is to recommence drilling to the base of Deep Omicron. The presence of light oil at current TD has been confirmed by sampling. Testing plans will be assessed on reaching final TD. The confirmed presence of oil in the Deep Omicron interval at Sapele-3, 16 kilometers from the original Deep Omicron discovery at Sapele-1, extends the currently mapped Deep Omicron fairway significantly Northwards into MLHP-6. Consequently a significant increase in current Deep Omicron in-place volumetrics is anticipated.
At the shallower Miocene (Dl-r) equivalent interval target, a 7 meter high quality sandstone was encountered with a I meter gas-condensate column. The extent and size of the discovery is worthv of further evaluation.
Kevin Hart, Chief Executive of Bowleven plc commented:
“We are excited with results so far at Sapele-3. The Deep Omicron interval continues to deliver and the confirmed presence of oil and good quality reservoir at this location further emphasises the significance of this play within the Douala Basin. All four Sapele wells drilled have now encountered oil within the Deep Omicron interval, thus reinforcing the geological model and highlighting the overall development and exploration potential of the fairway. This well has also now shown that the Deep Omicron interval extends considerably beyond the currently mapped area which has significant implications in terms of both volumetrics and prospectivity potential on both block MLHP-5 and MLHP-6. In addition, the gas condensate discovery at the Dl-r interval is promising and warrants further evaluation.
The results at Sapele-3 represent another step towards our overarching strategy of converting resources to reserves whilst highlighting the extensive exploration potential in the basin. We look forward with eager anticipation to the further drilling planned at Sapele-3.”
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