Abstract: Constraints on Interpretations Structural Trap in 4 Dimensions

K. D. Kelsch, W. S. Kowalik, C. F. Kluth

Interpretation of the geometry of the structural hydrocarbon trap continues to be one of the fundamental risks in exploration for, and production of, hydrocarbons. New geometric and computer tools are being developed to improve those interpretations by allowing the incremental restoration of structures in three dimensions. This adds powerful constraints on the structural interpretation because it requires that the interpretation be rational and consistent not only for the structure in the line of one cross section at the present time, but also for all moments during its development in 3 dimensions. It is possible to gather information, such as juxtaposition of different reservoir units through time to evaluate the development of seals or leaks with respect to trap formati n and to maturation and migration of hydrocarbons. In addition, software is available to produce interactive 3D images of the data that allow the interpreter to see the 4D restoration as it proceeds, but also to change the viewing orientation. This allows the interpreter to "move" through the restoration and examine areas critical for the interpretation as the restoration proceeds while viewing in 3D. While some of these tools are still under development, we have applied them successfully to model and real data sets.

AAPG Search and Discovery Article #90958©1995 AAPG Pacific Section Meeting, San Francisco, California