Key Role of Outcrops and Cores in Carbonate Reservoir Characterization and Modeling, Lower Permian Fullerton Field, Permian Basin, United States
Stephen C. Ruppel, Rebecca H. Jones, 2006. "Key Role of Outcrops and Cores in Carbonate Reservoir Characterization and Modeling, Lower Permian Fullerton Field, Permian Basin, United States", Giant Hydrocarbon Reservoirs of the World: From Rocks to Reservoir Characterization and Modeling, P. M. (Mitch) Harris, L. J. (Jim) Weber
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The analysis of reservoir sequence and cycle stratigraphy, of depositional and diagenetic facies, and of the interrelationships between these attributes and reservoir properties is key to the construction of an accurate reservoir framework needed for reservoir modeling and improved imaging of remaining hydrocarbons. Fundamental steps in such a rock-based process of model construction applied at Fullerton Clear Fork field, a shallow-water carbonate platform reservoir of middle Permian age, included (1) creating and applying an analogous outcrop depositional model; (2) describing and interpreting subsurface core and log data in terms of this initial model; (3) defining the sequence-stratigraphic architecture of the reservoir section; (4) developing a cycle-based reservoir framework; and (5) defining controls, interrelationships, and distribution of porosity and permeability. Data used in this analysis included cores, thin sections, three- and two-dimensional seismic data, borehole image logs, and outcrop models.
Key geological elements addressed and incorporated into the models include stratal architecture, differential dolomitization, karst fill, mineralogical variations, and rock-fabric distribution. These components were used to constrain interpretation and definition of flow units, permeability distribution, and saturation.
In addition to resulting in improved and more geologically realistic reservoir models, the rock-based methods used in this study provide key insights into the formation, characterization, and interpretation of carbonate platform reservoirs; these insights have widespread application worldwide.
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This volume assembles information on giant (>500 MOEB recoverable reserves) hydrocarbon reservoirs that will be of value to a wide audience. Although far from exhaustive, this compilation includes a wide range of reservoirs when examined from any perspective, such as location, geology, and production history. Reservoirs described in this volume are located in the Middle East, Asia, West Africa, North America, and South America. The authors explore historical and alternative approaches to reservoir description, characterization, and management, as well as examining appropriate levels and timing of data gathering, technology applications, evaluation techniques, and management practices in various stages in the life of individual development projects. Enhanced recovery of hydrocarbons requires a critical understanding of reservoir heterogeneity by both geoscientists and engineers. The giant fields discussed in this Memoir address issues important to reservoir description, characterization, and management from both geologic and engineering perspectives.