Editor's Note: The Geologic Column, which appears monthly in TLE, is (1) produced cooperatively by the SEG Interpretation Committee and the AAPG Geophysical Integration Committee and (2) coordinated by R. Randy Ray and Lee Lawyer.

An irony of contemporary petroleum exploration and development is that, although technological advances have been significant, risk has not been reduced in all cases. In fact, risk may actually be greater in some environments—given costs associated with deepwater platform design and subsalt reservoirs. With risk remaining significant or perhaps even growing, the definition and understanding of uncertainty is a major challenge.

Geologic uncertainty about...

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