Gulf of Mexico Blocks GB 667, 668 & 669

Landmark: World’s First Use of Flying Lead Deployment Sled

Project Overview

• Contract Award: 2001
• Sales: Houston, Texas
• Fabrication: Houston, Texas
• Service Base: Houston, Texas
• Host Type: Spar
• Contract Type: EPC

Project Characteristics

• No. Trees: 7 (Surface, Non-FMC)
• 3 (Subsea)
• Water Depth: 950 m (3,120 ft)
• Tree Type: Enhanced Horizontal
• Tree Pressure: 10,000 psi
• Tree Bore Size: 5"x2"
• Hydrocarbon: Oil/Gas

Project Ownership

• Kerr-McGee 50%
• Nexen 30%
• ERT 20%

Scope of Work

Subsea

• Three (3) enhanced horizontal 5"x2" 10,000 psi subsea trees
• UWD-15 subsea wellhead systems
• Upper and lower crown plugs both installed in extended tubing hanger
• ROV-installed tree cap
• Integrated a customer-supplied electro-hydraulic production control
• Flowline connectors, hubs and gate valves for flowline jumpers and sleds
• Connector actuating tools (CAT) used to operate max-8 mechanical connectors on flowline and well jumpers
• Tree and tubing hanger running tools
• System integration testing, offshore installation support and technical assistance

Surface

• Seven (7) internal hydraulic tieback connectors for spar production risers
• Stress-joint interface design
• Stress-joint integration and testing
• Engineering and offshore installation

Comments

The Gunnison Field is located in the deepwater Gulf of Mexico at 950 m (3,100 ft). The Gunnison Field includes Garden Banks Blocks 667, 668 and 669. The project was developed using a truss spar similar to the spars used in development of the Nansen and Boomvang Fields. The spar is designed for a production of 40,000 bopd and 200 mmcf/d of natural gas. Initial production from the development was achieved in fourth-quarter 2003. The initial development includes ten (10) wells connected to the spar: seven (7) dry trees and three (3) subsea wells for Gunnison and Durango.

The Gunnison development provides, Kerr-McGee with its fourth deepwater hub in the Gulf of Mexico and allows maximizing the value of the developments and surrounding assets. Following its strategy of focusing on core areas in high-potential trends, Kerr-McGee has accumulated an inventory of forty (40) blocks in the immediate Gunnison area, and holds interests in more than 300,000 acres in the western and southwestern Garden Banks area.