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This paper provides an overview of the preparation, mobilization, and operation of subsea intervention, sidetrack, and re-completion of three wells and acidizing of two wells in offshore Balikpapan, Indonesia. The operation was conducted on wells at various water depths (400-1500 m) in a single continuous campaign.

These activities were carried out using an agile project management framework, focusing on early alignment of critical interfaces and accelerated mobilization of intervention and completion equipment. Close communication, planning and a lesson learned feedback loop with the onshore team allow for better planning in maintaining optimal system configuration such as a riser tally when moving from well to well. Preservation, function, and interface testing of equipment in between wells also play a critical role in allowing for maximum uptime of the system.

This operation was executed with no safety incidents, no downtime, within budget and on schedule. Key success factors such as early system engineering, integrated operations, in between well asset management, After-Action-Review (AAR) and the contractor management process will be evaluated and discussed. The methodology used for discussion in this paper allows for the accelerated mobilization of equipment and in-between well operations in order to achieve an optimal timeline of complex well intervention and completion at different water depths.