During this campaign, the objectives were...

During this campaign, the objectives were quite complex to achieve:
• Producing both Marlin and Manta reservoirs from the same platform generates long horizontal departures and drilled lengths as well as complex 3D profiles. Installing two platforms in water depth > 100 m was not economical;
• Manta reservoir is located in deep water below the slope of the continental shelf in soils that are increasingly weak and prone to losses due to the decreasing overburden. The combination of high inclination, drilled length and weaker fracture gradient become quite complex to manage and require special techniques;
• The oil rim in Marlin reservoir is quite thin and requires a very accurate positioning of the hole.

The operations have been carried out with a semi-sub tender drilling unit. Downhole and surface data were transmitted in real time to the base for a constant monitoring.
Each of these reservoirs required specific measures, that were very different from one well to the other.
Reaching Manta reservoir entailed extended well drilling techniques.