Boabat Alnoor delivered the comprehensive Engineering, Procurement, Construction, and Commissioning (EPCC) contract for the FCP Offsite Facilities Overhead Transmission Line (OHTL) system in the Garraf Oil Field for PETRONAS Carigali Iraq Holding B.V. (PCIHBV)[cite: 7]. The infrastructure project established a high-reliability 6.6 kV overhead power distribution network energized from the FCP Main Substation, safely transferring critical offsite facilities from localized generation to centralized grid power[cite: 7].
Scope
The contract covered full turnkey engineering, procurement, construction, pre-commissioning, and changeover tie-in works, including[cite: 7]:
- Route, topographical, and geotechnical surveys, tower/pole setting-out, and Right-of-Way (ROW) ground preparation[cite: 7].
- Detailed electrical, civil, and structural engineering for overhead line profiles, pole foundations, earthing schemes, and facility tie-in interfaces[cite: 7].
- Turnkey procurement and supply of tubular steel poles, cross-arms, stay wires, AAC conductors, 11 kV insulator assemblies, surge arresters, and line hardware[cite: 7].
- Erection of double-circuit overhead lines and upgrading of existing structural towers for new interconnects[cite: 7].
- Underground 6.6 kV medium-voltage and low-voltage cable trenching, laying, terminations, and tie-ins to the FCP Main Substation and receiving facilities[cite: 7].
- Installation and retrofitting of manual transfer switches, auto-transfer schemes, and LV switchgear modifications to facilitate smooth changeover from diesel generation to utility power[cite: 7].
- Refurbishment, overhaul, and reinstatement of designated emergency diesel generators for backup resilience[cite: 7].
- Scope expansion under project Addendum: new 6.6 kV OHTL extensions to the Custom Bonded Area and Fire Station, complete with H-poles, disconnectors, and isolation assemblies[cite: 7].
- Engineering, construction, and commissioning of a dedicated 250 kVA (6.6/0.42 kV) distribution transformer substation at the Fire Station, including civil foundations, blast/firewall, oil catchment pits, security fencing, and switchgear integration[cite: 7].
Key Deliverables & Facility Tie-Ins
The project encompassed extensive power transmission and distribution assets across the Garraf Contract Area[cite: 7]:
- OHTL Network: Five new double-circuit 6.6 kV line sections (~14.5 km) plus ~5.5 km of tie-in upgrades on existing sections, supplemented by dedicated extensions to the Custom Bonded Area and Fire Station[cite: 7].
- Integrated Offsite Nodes: Complete electrical changeover and tie-in execution at Well Cluster 1 (WC1), Well Cluster 2 (WC2), Single Wells GA1, GA3, and GA4, Garraf Base Camp (GBC), Water Intake Station (WIS), and Garraf Vocational Training Centre (GVTC)[cite: 7].
- Substation & Transformers: Turnkey 250 kVA, 6.6/0.42 kV transformer facility installed at the Fire Station, alongside integration of a 150 kVA transformer at GVTC[cite: 7].
- Conductors & Hardware: Tubular steel poles with kick blocks, AAC Polar conductors, 65,000 m of AAC OAK conductors, 11 kV pin and tension insulators, pole-top disconnectors, and fuse cutouts[cite: 7].
- Cabling & Containment: Heavy-duty MV/LV power and control cabling, certified terminations, cable containment systems, and deep earthing protection grids[cite: 7].
How it is delivered
Working inside operating oilfield corridors and active well pads, BN executed line stringing, pole spotting, and plant tie-ins in strict compliance with PETRONAS HSE frameworks and PTW procedures[cite: 7]. Electrical changeovers and power transfers were sequenced to eliminate unplanned operational interruptions to base camp and production facilities[cite: 7].
Quality assurance protocols included high-voltage insulation tests, Hi-Pot cable testing, grounding resistance checks, and end-to-end trip verification across transfer switches and protection relays before commercial energisation[cite: 7].
