The NAQ PII Platform project was developed for BU Qir Petroleum through client Rosetti Marino, representing a sophisticated offshore engineering solution in the Mediterranean Sea. TECON provided comprehensive basic and detail design services for both the jacket substructure and integrated topside facilities during the 2009-2010 period.

This minimum facilities platform serves as a critical link in the gas production chain, connected via a 5 km subsea pipeline to the NAQ PI platform, which provides primary gas separation services and conveys the processed product to the A/Q PII platform. The platform was engineered to accommodate four operational wells based on a pre-existing template installed during the appraisal phase, with two additional slots reserved for future expansion installations.

Project Scope

The project encompassed complete structural engineering for an offshore fixed platform in 28.5 meters water depth. The facility features a four-leg lattice jacket foundation supporting a well-head module and a three-level integrated deck structure. Key infrastructure includes boat landing facilities, barge bumpers, a 12-inch riser system, and a sump caisson. The foundation utilizes open-ended steel piles driven through jacket legs and secured with welded crown plates.

Jacket Structure Engineering

• Design of primary structural elements for in-service, load-out, transportation, lifting, and on-bottom installation phases
• Comprehensive jacket fatigue analysis ensuring long-term structural integrity
• Pile foundation design and cathodic protection system engineering
• Secondary structure design including boat landing, barge bumpers, riser integration, caissons, mud mats, and access walkways

Topside Facilities Engineering

• Primary structural design covering in-service operations, load-out, transportation, and lifting phases
• Integrated deck design with dimensions of 22.5m x 23.5m accommodating three operational levels
• Secondary structure design encompassing flooring systems, stairs, walkways, technical rooms, and equipment support structures
• Specialized facilities including crane pedestal and helideck for personnel transfer and emergency evacuation

Well-Head Module Design

• Two-level tubular structure partially integrated within the topside configuration
• Designed to accommodate well Christmas trees and production control systems
• Engineered to permit well drilling operations prior to topside installation, optimizing construction schedule

Engineering Approach

TECON’s engineering methodology integrated advanced structural analysis with practical offshore construction requirements. The design process addressed multiple critical load cases and operational scenarios, ensuring compliance with international offshore standards. Special attention was given to the Mediterranean marine environment, incorporating appropriate safety factors for wave loading, current forces, and seismic considerations.

The integrated approach between jacket and topside design ensured optimal load distribution and structural efficiency, while the modular construction strategy facilitated fabrication yard efficiency and offshore installation procedures. The provision for future well slots demonstrates forward-thinking design philosophy, accommodating field development expansion without major structural modifications.