Petrobras issues the results of the drilling of another well in Carioca area, situated in Block BM-S-9 which confirms the potential of the exploration area.
This new discovery was proven by means of good quality oil sampling of close to 28o API, by cable test in carbonate reservoirs of approximate 4830m deep. A formation test in the interval is estimated to be performed in order to evaluate the productivity of such reservoirs.
In addition to that, it is also in progress a long term test in well 3-SPS- 74 (Carioca Northeast), which is a well connected to the FPSO Dynamic Producer. The outcome indicates a potential for production of approximately 28,000 barrels per day, which is above the initial estimates. Currently the well produces a flow of 23,400 barrels per day, in face of the restrictions imposed by ruling of ANP (National Agency of Petroleum Natural Gas And Biofuels).
In addition to the discovery well, four other wells were drilled and two formation tests were performed in the area of the Plan of Discoveries Assessment of Carioca. Such activities complied with all the commitments made with ANP.
Based on the results found in the Carioca area, the Consortium requested ANP to postpone the closing of the Plan of Discovery Assessment and the Announcement of Commercial Viability, which were originally estimated to November 2011.
The new deadline shall be used to perform the activities not provided in the original program: drilling of up to three exploration wells and a long term test.
ANP authorised the review of the Activities and the Schedule for the Plan of Discovery Assessment PA-1-SPS-50 (Carioca), with the introduction of additional operations, and the deadline of the Announcement of Commercial Viability was postponed to December 31, 2013.
The extension of the deadline for the Assessment Plan does not alter the plans and the schedule of the Consortium in relation to the implementation of the production development project.
The Consortium of Block BM-S-9, operated by Petrobras (45%) in association with BG E&P Brasil (30%) and Repsol Sinopec Brasil (25%) will give continuity to the engagements of the Plan of Discovery Assessment approved by ANP.
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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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Safe Scandinavia operated for BP at Valhall on the Norwegian Continental Shelf until mid March.
Safe Caledonia commenced operation for BG on the UK Continental Shelf in the beginning of March.
Safe Astoria and Safe Bristolia were idle in the first quarter.
MSV Regalia, Safe Scandinavia and Safe Caledonia have carried out parts of their annual maintenance work in the first quarter. Safe Bristolia has undertaken a five year Special Periodic Survey (SPS) during the first quarter.
In the first quarter, Safe Concordia was mobilizing to Brazil and arrived in Rio de Janeiro on 10 April. The rig will go through the necessary approval process and is expected to commence on contract with Petrobras in the near future.
( Original Article )