Roger D. Shew, G. M. Tiller, C. J. Hackbarth, C.D. White
Reservoir characterization and delineation are critical in early prospect evaluation and field development. Reservoirs dominated by thin-bedded deposits with subordinate channel complexes are particularly problematic because logs and conventional 3-D seismic cannot resolve the detailed architecture and properties necessary for reservoir evaluation and simulation. Reservoirs of this type have been penetrated as primary and secondary objectives
in the Gulf of Mexico. The approach used to model these reservoirs where there is limited "hard" data involves: (1) detailed core and high-resolution log evaluations to establish stacking patterns, permeability and porosity distributions, and net/gross, (2) analog outcrop studies, particularly of thin-bedded deposits, and high-resolution seismic data to establish conceptual models of deposition, specific information on vertical and lateral facies relationships, and bed length distributions, (3) deterministic and probabilistic techniques to construct the reservoir architecture and then to assign detailed rock properties from core to individual layers, and (4) detailed simulations for well test design and production performance predictions that preserve the geologic and petrophysical de ail. Analog studies, depositional models, core studies, architectural models, and comparison of predicted and actual field results are presented.
AAPG Search and Discovery Article #90986©1994 AAPG Annual Convention, Denver, Colorado, June 12-15, 1994