Equatorial Guinea Block B

Landmark: World’s First Major Development Achieving Concept to First Oil in Eighteen (18) Months

Project Overview

• Contract Award: 1995 (Ph I)
• 1996 (Ph II)
• 1997 (Ph II B)
• 2001 (Spares)
• 2002 (Ekanga Notch)
• Sales: Houston, Texas
• Fabrication: Houston, Texas
• Service Base: Malabo, Equ. Guinea
• Host Type: FPO
• Contract Type: EPC

Project Characteristics

• No. Trees: 9 (Ph I)
• 16 (Ph II)
• 5 (Ph II B)
• 3 (Spares)
• 5 (Ekanga Notch)
• Water Depth: 170 m (560 ft)
• Tree Type: Vertical & Horizontal
• Tree Pressure: 5,000 psi
• Tree Bore Size: 4"x2", 5"x2"
• Hydrocarbon: Oil

Project Ownership

• ExxonMobil 71%
• Devon 24%
• Gov. Equ. Guinea 5%

Scope of Work

Phase I:

• Nine (9) vertical 4"x2" 5,000 psi subsea trees with tubing head completion guide bases (CGBs)
• Direct-hydraulic topside subsea tree and manifold control systems
• Direct-hydraulic IWOCS and tree running tools
• Installation, management and service 

Phase II:

• Sixteen (16) vertical 4"x2" 5,000 psi subsea trees
• Four (4) HOST® systems with retrievable pigging loops
• Electro-hydraulic production controls
• Universal Tie-In System (UTIS®) tool and all flowline termination equipment for tie-ins to HOST® manifolds 

Phase IIB:

• Five (5) horizontal 5"x2" 5,000 psi subsea trees with 7" tubing hangers for water injection

Spares:

• Four (4) vertical 4"x2" 5,000 psi subsea trees; one (1) horizontal 5"x 2" 5,000 psi subsea tree

Ek. Notch:

• Four (4) vertical 4"x2" 5,000 psi subsea trees; one (1) horizontal 5"x2" 5,000 psi subsea tree
• Electro-hydraulic production control systems
• One (1) HOST® template and manifold

Comments

Discovered in 1995, the Zafiro Field is located on Block B approximately 65 km (40 miles) northwest of Equatorial Guinea in water depths of 425 to 850 m (1,400 to 2,800 ft). Production from the Zafiro Field began in August 1996. Current facilities include a fixed platform, a floating production unit, a floating storage and offloading unit and both platform and subsea wells.

By the time Zafiro Phase I was under way, it became obvious that an expansion would be inevitable. Phase II involved bringing another sixteen (16) subsea wells online, bringing daily production from 40,000 bopd to 120,000 bpod. Phase IIB saw the installation of five (5) additional subsea wells for water injection and expanded electrical generation capacity.

Ekanga Notch consists of five (5) subsea trees. Production from Ekanga Notch brings total production to 150,000 bopd.