Assessment of Reservoir Quality Potential: A Synthesis of Observations from Different Geological Settings

S. T. Paxton, F. L. Wehr, J. M. Ajdukiewicz, G. T. Cayley

The potential for reservoir quality preservation at depth has been evaluated relative to a seriatim of generally recognized controls by analysis of integrated depositional and diagenetic data from different geologic settings. The controls include temperature, fluid pressure, sandstone provenance, fluid chemistry/type, and depositional environment. Evaluation and ranking of the preservation potential for these controls was accomplished through testing with geologically constrained porosity/permeability populations. Application of the seriatim for assessing reservoir quality potential is best achieved with a series of maps representing each of the elements determined critical to a particular play or prospect. Cross-contouring of these elements yields a single map showing ar as of similar reservoir quality risk. Typically, optimum reservoir quality is not due to a single element but rather an accumulation of positive factors. Advantages of the approach include: better definition of reservoir quality controls, easier communication of complex diagenetic issues, more efficient and consistent ranking of prospects, and placement of prospects into a regional context.

AAPG Search and Discovery Article #91020©1995 AAPG Annual Convention, Houston, Texas, May 5-8, 1995