De-Risking Deepwater Subsea Field Development

Stuart Mackay¹, John R. Lovell², Dinesh Patel², and Donnie Ross^2
1Completions, Schlumberger, Mahape, Navi Mumbai, India
²Completions, Schlumberger, Rosharon, TX

The expense of subsea well intervention often leads to insufficient reservoir information for accurate understanding of reservoir drainage, water control, conformance, flow assurance and compaction. Subsea wells are known to produce roughly 75% of comparable dry-tree installations, and they may have less than 10% of comparable data (ref. 1). There is a crucial need for real-time sand-face data, a robust mechanism to deploy sensors to get that data, and a multi-discipline interpretation strategy to maximize the value of those sensors. For the first time, all three have become available. Permanent distributed temperature arrays will be installed in high-rate deepwater gas wells with up to 1200m water depth and extensive 3D seismic coverage. Modeling and interpretation determined the specifications and requirements for this customized completion system.

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