Abstract A 3-D geological model was constructed from a 3-D outcrop for reservoir flow simulation that can address the effects of small-scale (subseismic), interwell heterogeneities on production in analog deep-water oil and gas reservoirs. The dimensions of the Hollywood Quarry, Arkansas (Figure 1) , are 380 x 250 x 25 m (1247 x 821 x 83 ft) ( Figures 2 , 3 ). The quarry exposes in 3-D the upper Jackfork Group turbidites, which ate often used as an outcrop analog for deep-water reservoirs in the Gulf of Mexico and elsewhere. A variety of turbidite facies are present: lenticular, channelized sandstones, pebbly sandstones, and conglomerates within shales (CI); laterally continuous, interbedded thin sandstones and shales (SI, S2); and thicker, laterally continuous shales (Ml, M2). Sandstone and shale beds are folded and cut by strike-slip faults with a vertical component. These combinations of structural elements and facies have resulted in a stratigraphic interval that is highly compartmentalized, both horizontally and vertically. The quarry is used here as an analog to a variety of subsurface reservoir types. Techniques used to characterize the quarry include behind-outcrop coring, outcrop gamma-ray (GR) logging, measured stratigraphic sections, sequential photography of the quarry walls, Digital Orthophoto-Quadrangle (DOQ) mapping, Ground Penetrating Radar (GPR), Global Positioning System (GPS), shallow, high-resolution seismic reflection, and GPS laser-gun positioning of geologic features in 3-D space. The west wall has been quarried back within 0.5 m (1.6 ft) of the first inline of an earlier 3-D GPR survey and coring operation. The

Abstract The Cretaceous Lewis Shale-Fox Hills-Lance Formations in southern Wyoming ( Figure 1 ) were deposited during the final transgressive-regressive cycle of the Cretaceous western interior seaway ( Figure 2 ). These formations comprise a third-order highstand systems tract ( Figure 3 ) composed of several fourth-order lowstand-highstand cycles. One of these fourth-order cycles is well exposed in three outcrops — called Spine 1, Spine 2, and Rattlesnake Ridge — over a distance of 3.2 km (2 mi) ( Figure 4 ). The strata within these outcrops are important for two reasons: 1) they provide good outcrop exposures of the Lewis Shale in an area of active exploration for gas, and 2) the Dad Sandstone Member of the Lewis Shale here is considered to be an excellent, scaled analog of delta-fed, mud-dominated, progradational, turbidite systems that are hydrocarbon-productive in areas such as the Gulf of Mexico and offshore west Africa.