3-D Analysis and Model Construction
The 3-D geologic model is built first in the mind. Computer hardware and software are simply tools that allow for integration and analysis of massive amounts of data, and provide a visualization product for analysis; they are not a substitute for human interpretation and experience.
The primary goal of 3-D geologic modeling is to capture the porosity, permeability, and saturation structure of the 3-D earth cube in order to derive a spatial understanding of the interwell heterogeneity. This requires an accurate stratigraphic framework, a reasonable method of data distribution, and a careful analysis of which stratal units actually control fluid flow. For example, a 1-foot thick shale, or a diagenetic carbonate cement barrier, may represent the most important feature to preserve in a 3-D model, but could easily be averaged out in the up-scaling process.
Figures & Tables
Sequence Stratigraphy and Characterization of Carbonate Reservoirs - Reservoir management is an important topic in the oil industry today. Conferences, forums, short courses, and technical papers, written and attended by engineers, geologists, geophysicists, petrophysicists, and managers discuss various aspects of reservoir management. A critical component of reservoir management is the accurate characterization of the hydrocarbon asset, called reservoir characterization. The topic of this course is the process of sequence-stratigraphic interpretation and characterization of carbonate reservoirs. Because of the overwhelming mass of information most reservoir geoscientists keep up with either some aspects of sequence-stratigraphy, or some aspects of reservoir characterization, but typically not both. The authors believe that the two disciplines are so intimately related that the sequence framework should be considered a critical piece of the integrated puzzle.