Subsea Processing and Boosting - Building Blocks for Scenarios

Abstract:

In the last 30 years or more PETROBRAS discoveries offshore were predominantly in deepwater. The successful history was supported, among other pillars, on a policy of investing aggressively on R&D projects through its R&D Programs like PROCAP-3000, among others. Specifically, Subsea Technology and Process have done much to unlock the non-conventional deepwater and heavy oil resources offshore Brazil and will continue to do so. High levels of activity in these areas will remain necessary with increased technology content. In particular, the shift to Subsea Processing is becoming more marked as a means to: 1-anticipate production, 2-improve reservoir recovery, 3-debottleneck high water flow rate field platforms and 4-allow marginal fields development.

Actually, after successful implementation of several - technology projects, on subsea boosting and processing, the leading operators in these technologies have demonstrated that subsea processing is definitely a field development tool as predicted decades ago. Bearing in mind the above considerations, this paper introduces the updates on PETROBRAS most recently subsea boosting and processing efforts. The work hereafter includes applications and developments on the following technologies: Subsea Raw Water Injection, High Power ESP, Subsea Gas-liquid and Oil-Water Separation, Subsea Multiphase Pumping, Seabed ESP. It examines the main hurdles for applying these technologies Offshore Brazil on long tie-backs and ultra-long tie-backs (for instance: producing subsea to beach or very long tie-backs - 150 km or more).