CASE STUDY

Project overview:

The Ithaca operated Jacky oil field represents the first field development completed by the Company. First oil was achieved from the field in April 2009.  The Jacky field development consists of one production well and one water injector well.  The wells are tied into an unmanned mono-tower platform (NUI), located over the field, from where production is exported directly to the Beatrice Alpha platform approximately 10 kilometres to the south for onward transportation to the Ithaca operated Nigg onshore oil terminal.

As part of its full field life cycle management, Ithaca commissioned a study define the associated costs with decommissioning of the Jacky subsea field infrastructure including the Jacky NUI.

Key Deliverables

• Study report including methodology for decommissioning, overall schedule of offshore operations and full cost estimate including onshore PM&E, offshore and equipment disposal.

Added Value

• Experience from involvement with Jacky subsea infrastructure and NUI installation which was applied to the decommissioning study.
• Experience in Jacky day-to-day pipeline operations including charter of survey vessels which was applied to the decommissioning study.
• Experience from other North Sea decommissioning projects through to physical removal of infrastructure.

Petrex Scope:

Petrex performed engineering  studies  to define decommissioning methodologies, schedules and costs in accordance with UKOOA guidance documents (Guidelines on Well Abandonment Cost Estimation Issue 1 2011 and Guidelines on Decommissioning Cost Estimation Issue 3 2013).

Phase 2 of the scope comprises of FEED activities which will be implemented Q2/Q3 2015.

Phase 3 entails the pipeline conditioning in readiness for disconnection.

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