Liza 1

Collaboration Drives Installation and Drilling Efficiencies

July 2019

The Subsurface and Wells teams collaborated closely with the Liza Project team on a number of fronts in the second quarter. They embodied the One Team approach to establish an installation and drilling sequence that maximizes operational flexibility, data capture and volumes for Liza Phase 1 field startup. This would not have been possible without collaboration and a shared vision between the Wells, Geoscience, Reservoir Engineering, Operations, SURF, Project Execution and Project Installation disciplines.

This multi-disciplinary team rapidly brought recommendations to decision makers in an efficient manner. They were able to establish offshore installation priorities and avoid downtime due to Simultaneous Operations (SIMOPS) by sharing a variety of considerations in a transparent manner.

Representatives of the Wells, Geoscience, Reservoir Engineering, Operations, SURF, Project Execution and Project Installation teams at work on the offshore drilling and installation sequence

The benefits of this collaboration have been evident during the early execution of SURF installation activities. The One Team ethos has kept the Noble Bob Douglas drillship, the Saipem FDS2 installation vessel and the Chouest C-installer multi-purpose vessel productively occupied on the Phase 1 objectives.

In one instance, the FDS2 had to change its work sequence on short notice due to equipment repairs, and the team was able to successfully accelerate the subsea structure installation scope. In response, the C-installer was able to change its work sequence to accommodate the new FDS2 sequence. The resulting effort turned a potential setback with equipment repairs into an opportunity to eliminate future potential conflicts where the vessels would need to be in the same area at the same time.

Also in this quarter, the Subsurface and Wells teams delivered the 1P4 producer well completion and tree installation, which is the second production well to be completed for Liza Phase 1. The team is now actively drilling the 1G3 reservoir zone. The 1G3 well will be the first gas injector to be completed. It will play an important role in post field startup, as it will inject produced gas into the reservoir for pressure maintenance and improved recovery purposes.