Reservoir characterization of Scollard-age fluvial sandstones, Alberta foredeep

Extensive carbonate cementation of fluvial sandstones: An integrated outcrop and petrographic analysis from the Upper Cretaceous, Book Cliffs, Utah

“…Furthermore, the field-and basin-scale patterns of carbonate cementation have been elucidated within many marine successions, and this has resulted in an understanding of the sedimentological and stratigraphic controls on the distribution of cementation (e.g., Prosser et al, 1993;Morad, 1998;Al-Ramadan et al, 2005;Machent et al, 2007;Taylor and Machent, 2010). Extensive carbonate cementation has also been previously reported from fluvial strata (e.g., Mozley and Davis, 1996;Milliken, 1998;Salem et al, 2000;Rossi et al, 2002;McBride and Milliken, 2006;Cavazza et al, 2009;Khidir and Catuneanu, 2010), but there is less of an understanding of the stratigraphic and sedimentological controls on its large-scale distribution (but see El-Ghali et al, 2009;Kordi et al, 2011). Fluvial strata commonly act as important hydrocarbon reservoirs, as well as groundwater aquifers.…”

How important is carbonate dissolution in buried sandstones: evidences from petrography, porosity, experiments, and geochemical calculations

“…These reappraisals showed that burial-induced carbonate dissolution in sandstones and carbonates is commonly insignificant. This conclusion is not new (Ehrenberg et al 2012); however, the retrospective nature of these new presentations is striking because the subjective idea that up to 20% secondary porosity can be formed by burial dissolution of minerals still persists in some very recent publications (Khidir and Catuneanu 2010;Kordi et al 2011) and textbooks (Boggs 2011 a-Porosity evolution models proposed by Schmidt and McDonald (1979) b-Modified from Giles (1987) Primary pores Secondary pores Quartz grains…”

“…1a). Based on petrographic identification and interpretation, this idea has been prominent in the literature on sandstone diagenesis for about 40 years (Bjørlykke and Jahren 2012;Boggs 2011;Burley 1986;Dutton and Willis 1998;Higgs et al 2010;Khidir and Catuneanu 2010;Kordi et al 2011;Schmidt and McDonald 1979a;Shanmugam 1984;Xi et al 2016;Wilkinson et al 1997;Yuan et al 2015a, b, c). At the same time, however, the advent of the deep burial dissolution proposals has caused intense debates (Fig.…”

Subsurface Channel Detection Using Color Blending of Seismic Attribute Volumes

“…Seismic attribute analysis, one type of data mining technique [1], is then used to improve the geological channel detection accuracy. Attributes, such as coherence, envelop and instantaneous phase, have been used in references [2][3][4][5][6]. Better performances have been done in these publications for channel description, comparing with traditional amplitude interpretation research.…”

“…Volumetric perspective rendering is often carried out to delineate spatial 3D shapes for the geological objects if the color threshold can be appropriately set. References [6][7][8] have shown amazing and vivid effects for subsurface channel imaging in 3D visualization environment. Among the cases, images of channels are mostly characterized by using single seismic attribute.…”