Abstract
ABSTRACT The development of a full-closure core catcher coring system has greatly improved the chances for successfully sampling the very soft, unconsolidated sands of the Gulf of Mexico. Designed as an alternative to the rubber-sleeve core barrel, the new coring system cuts a larger diameter, 3 1/2-in versus 3-in, and longer, 30-ft versus 20-ft, core. The full-closure core catcher completely seals the bottom of the barrel trapping the unconsolidated sands inside. Core handling is simplified through the use of a rigid PVC liner which encases and supports the loose sand. Freezing the unconsolidated sand in the liner at the rig and keeping it frozen throughout the entire core analysis program preserves the quality of the samples. Whole core X-ray analysis of the material encased in the liner reveals bedding planes, fractures, rock type, and the degree of sample disturbance. Slabbed cores can easily be preserved for ongoing studies by packaging them in a new core preservation system, ProtecCore®.
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