Textural and sequence-stratigraphic controls on sealing capacity of Lower and Upper Cretaceous shales, Denver basin, Colorado

Palynology and geochemistry of the Frasnian global transgression in the Parnaíba Basin, Brazil

“…5. Geochemistry and maximum flooding surface Some authors (Myers, 2004;Sutton et al, 2004;Lüning et al, 2004;Rodrigues, 2005; and references therein) have described the relationship between TOC content and the stratigraphy of sequences. Organic matter preservation in the sedimentary record depends on many factors.…”

Top seal development in the shale-dominated Upper Devonian Catskill Delta Complex, western New York State

“…However, although the organic carbon content of these deposits is half that of the basal strata, enough disseminated ductile organic matter was forced into pore throats during mechanical compaction to maintain a sealing capacity in excess of the tightest Hanover sample. Almon (1999, 2002) and Sutton et al (2004) make a compelling case for the strong relationship between the depositional environment of a shale lithotype, as expressed in its sequence stratigraphic position, and its sealing capacity. Upper transgressive systems tract (TST) and condensed sequence (CS) shales form the best seals, they suggest; coarser-grained high-stand systems tract (HST) and lowstand systems tract (LST) shales have somewhat lower sealing capacities.…”

“…aspect ratios of organic particles) and orientation (e.g. Sutton et al, 2004). The bulk mineralogy of the six shale samples analyzed by MICP was carried out by XRD.…”

4D simultaneous PP-PS prestack inversion in the Edvard Grieg field, Norwegian North Sea

“…The ability of any rock to act as a capillary seal for hydrocarbon accumulation depends on the diameter of the largest interconnected pore throat (Sutton et al, 2004). Clays can fill this pore space and expand in the presence of fluids, often causing cementation in the pores.…”