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Abstract

This chapter presents three groups of reservoir simulation models that address aspects of fluid flow in deltaic systems of lacustrine basins. These models are based on companion field-based geologic investigations of the Eocene Green River Formation in Nine Mile Canyon of the Uinta Basin, Utah (Taylor and Ritts, 2004; Moore et al., 2012). The first group consists of models based on two-dimensional (2-D) geologic descriptions of outcrops in Parley Canyon (Taylor and Ritts, 2004). These descriptions, combined with petrophysical data from measured sections to produce a three-dimensional (3-D) model based on one-dimensional (1-D) and 2-D data. Because results of the first simulation models demonstrated the importance of channels in the plumbing of such lacustrine deltaic systems, a second group of simulation models was constructed to address the impact of heterogeneity within individual channels on flow across and along channels. The data used to generate these channel models are entirely synthetic, although the geometries involved were digitized from sketches drawn by a geologist and guided by relationships observed in the Uinta Basin study area. The third group of models represents the northwest Argyle Canyon area and, unlike the Parley Canyon model, was constructed from a third geologic data set that was produced by integrating light detection and ranging (LIDAR) scanning and correlation with geologic description of multiple cliff outcrops of varying orientation in the field (Moore et al., 2012). Together, these models demonstrate dominant characteristics that control production efficiency of reservoirs in lacustrine deltaic settings and also demonstrate how improving geologic characterization improves the 3-D modeling of such systems.

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