Existing oil&gas field facilities extension / redevelopment challenges and lessons learned from conceptual studies to start-up

For the last decades, oil and gas field existing facilities have been extended and/or redeveloped to account for field evolution (declining reservoir pressure, satellite field tie backs, ...), economic perspectives from the rising oil barrel selling price, oil reserve/gas valorization and other environmental constraints such as ldquono gas flaring policyrdquo. For some existing offshore or onshore facilities, this has led to the integration of additional power generation and electrical distribution exceeding by far the initial electrical system capabilities. This paper intends to develop the main challenges, such as existing electrical equipment limitation, existing and new power generation management, requirements for limited shutdown during hook up, ... encountered from the conceptual study up to the start-up and operation. This paper will detail many of the lessons learned and document their implications in terms of design, construction, hook-up and commissioning.