Case Study

Oilfield Development and Installation

Project description

The development located offshore Brazil has water depths ranging from 120m in the north to 140m in the south of the development area.

Phase 1 of development consisted of early well testing and Pilot phases combined. Well testing involved the tie-back of a production well to an STP Buoy turret moored FPSO situated 2km North West of the well. The remaining Pilot phase included the tie-back of two further production wells and two injection wells.

Each production well is connected to the STP buoy via a production line, a service line and an umbilical. The two water injection wells are also tied back with a single flowline and an umbilical.

Our Scope

PDi were contracted to provide engineering support for both the onshore pre-engineering and offshore operations. All Engineering work was performed at the PDi office in Aberdeen, with ad-hoc visits to Brazil as required.

PDi’s scope included:

  • Installation Engineering Support (Flowline, Umbilical, MWA, Piles, Moorings and STP Buoy Installation Procedures)
  • Structural Engineering Support
  • Design of Horizontal Lay System
  • Management of the Fabrication of the Horizontal Lay System
  • Assembly and commissioning of the Horizontal Lay System
  • Management and preparation activities for the STP Buoy
  • Orcaflex Analysis support for the Buoy Installation
  • Orcaflex Analysis support for the flexible product installation
  • Managed the Hazard Identification and Risk Assessment in Rio and Aberdeen.
  • Managed the Fabrication of all installation aids
  • Managed the UK mobilisation of the Aker Wayfarer
  • Design of all the seafastening arrangements
  • Offshore support
Timing and Duration

Commenced April 2010 (Duration 2 years)

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