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Deepwater Gulf of Mexico - America's Expanding Frontier
SOURCE: U.S. Department of the Interior, Minerals Management Service, Gulf of Mexico OCS Region





NEW PIPELINES

The pipeline infrastructure to bring deepwater oil and gas onshore also expanded during the 1990�s.

The pipeline from a subsea completion to the host platform is commonly referred to as the tieback. The tieback length varies considerably, as shown in figure 49.

Figure 49. Length of subsea tiebacks.
Figure 49. Length of subsea tiebacks.

Most subsea wells are within 10 mi (16 km) of the host platform, with the Mensa field remaining the current world record holder for a subsea tieback length of 62 mi (100 km) from the host platform.

The second longest subsea tieback in the world (55 mi or 88 km) is Canyon Express, linking Aconcagua, Camden Hills, and King�s Peak projects to their host platform.

Deepwater pipelines approved for installation are shown in figures 50a and 50b.

Figure 50a. Approved deepwater oil and gas pipelines less than or equal to 12 inches in diameter. (Click the image to enlarge)
Figure 50a. Approved deepwater oil and gas pipelines less than or equal to 12 inches in diameter. (Click the image to enlarge)



Figure 50b. Approved deepwater oil and gas pipelines greater than 12 inches in diameter. (Click the image to enlarge)
Figure 50b. Approved deepwater oil and gas pipelines greater than 12 inches in diameter. (Click the image to enlarge)

The data include the total length of all pipelines originating at a deepwater development, including any shallow-water segments (control umbilicals are excluded).

Figure 50a shows deepwater pipelines that are less than or equal to 12 inches (30.5 cm) in diameter. The dominance of gas pipeline miles approved in deepwater is surprising � 58 percent of the total since 1990.

The large increase in 2001 in both oil and gas pipeline miles reflects approvals for Canyon Express (Aconcagua, Camden Hills, and King�s Peak fields), Horn Mountain, and the Boomvang-Nansen projects.

Installation of large pipelines (greater than 12 inches [30.5 cm] in diameter) dramatically increased in 2002 after a brief downturn in activity in 2000 and 2001 (figure 50b).

The peak in 2002 was driven by the approval of the Mardi Gras system.


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Cover and Title Page

PREFACE

INTRODUCTION

BACKGROUND
LEASING DRILLING AND DEVELOPMENT RESERVES AND PRODUCTION SUMMARY AND CONCLUSIONS . . . Feedback