--> Abstract: Geotechnical Engineering Problems of Upper Slope Sites in Northern Gulf of Mexico, by Leland M. Kraft, Jr., Kerry Campbell; #90961 (1978).
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Abstract: Previous HitGeotechnicalNext Hit Engineering Problems of Upper Slope Sites in Northern Gulf of Mexico

Leland M. Kraft, Jr., Kerry Campbell

During the past 30 years, technology has evolved to allow hydrocarbon production structures to be sited in deeper and deeper water. Structures now are being designed for and installed on outer-shelf and upper-slope areas in water depths of up to 1,000 ft (300 m) in the northern Gulf of Mexico. More than 50 blocks have been leased on the upper continental slope in water depths ranging from about 600 to 2,000 ft (180 to 600 m). In addition to pile-supported structures for these deep-water sites, two new concepts are being studied: tension leg structures and guyed towers. Engineering considerations for these new types of structures include spud-can penetration resistance, anchor-drag distance, anchor-holding power, breakout resistance, consolidation settlements, and cyclic l ading on foundation performance, as well as overall site stability.

The design and siting of structures are influenced by the geologic and soil conditions. Because of the unique nature and history of the northern Gulf of Mexico geosystem, special Previous HitgeotechnicalNext Hit problems commonly are severe. These problems include active faults, relatively weak soils, slide and mudflow areas, relatively steep slopes, irregular seafloor, and local but significant variations in soil properties. Thorough Previous HitgeotechnicalNext Hit investigation, commonly on a regional basis, and rigorous assessment of these and similar problems are required to design and install safe, environmentally acceptable, and economical structures. These Previous HitgeotechnicalTop investigations and assessments require that existing engineering, geologic, and geophysical techniques and expertise be effectively integrated to pro ide a multidisciplinary approach, and require that new equipment and techniques be developed. Most advances probably will be with respect to measuring in situ soil conditions and properties by both geophysical and mechanical means.

AAPG Search and Discovery Article #90961©1978 AAPG Annual Convention and Exhibition, Oklahoma City, Oklahoma