Jonathan Bryan

Biotic, geochemical, and paleomagnetic changes across the Cretaceous/Tertiary boundary at Braggs, Alabama Douglas S. Jones Florida State Museum, University of Florida, Gainesville, Florida 32611 Paul A. Mueller, Jonathan R. Bryan, Jon P. Dobson, James ET Channell ...

Exposed near Braggs, Alabama, is one of the few well-studied, nearly continuous shallow-marine Cretaceous/Tertiary boundary sections; it allows a glimpse of the biotic and environmental changes that occurred in the latest Cretaceous to earliest Paleocene. Paleomagnetic, strontium isotopic, and biostratigraphic data closely constrain the age of a series of lithologic, geochemical, and biotic variations and suggest that no more than 100 200 ka could be missing at the boundary. A major reduction in macrofaunal diversity associated with lithofacies changes occurs prior to but within 300 ka of the nannofossil-defined boundary. Approximately 40% of the apparent faunal reduction is attributed to the “Lazarus effect.” Faunal and floral assemblages, trends in carbon isotopic composition of benthic invertebrates, and lithologic characteristics indicate that a latest Maestrichtian regression culminated near the boundary (Chron C29R; Micula murus</em> zone), significantly later than recent estimates. Water depths at this site remained shallow during the subsequent early Paleocene (zone NP1) transgression and did not reach depths equivalent to those of the late Maestrichtian until zone NP2. Relatively minor climatic changes across the boundary are suggested by a ≤4 °C cooling trend seen in the oxygen-isotope paleotemperatures. A high-resolution 87Sr/86Sr record from well-preserved macrofossil calcite shows a pattern of smooth variation and elevated values near the boundary; however, the early Paleocene “spike” of other workers was not found.

... Comparative Investigation of Thermal Processes for Marginal Bitumen Resources Jie Wang, Unversity of Calgary; Jonathan Bryan, TIPM Laboratory ... following types of marginal bitumen reservoirs: • Thin pay zone; • Thin pay zone with thick bottom water; • Low permeability; Both ...

A number of techniques have previously been developed that use low field nuclear magnetic resonance (NMR) relaxometry for conventional and heavy oil reservoir characterization. In the current work, the adaptation of these algorithms for use in the oil sands industry is presented. NMR based methods have been developed for identification of water and bitumen content in ore and froth samples. Consistent algorithms have been used to analyze over 500 ore samples and 50 froth samples from the Athabasca oil sands in northern Alberta. Preliminary analyses are shown, with applications for in-situ fluid determination using NMR logging tools and improved process control in oil sands processing plants.Plusieurs techniques reposant sur la relaxométrie à résonance magnétique nucléaire (RMN) pour la caractérisation des réservoirs conventionnels et d'huiles lourdes ont été mises au point antérieurement. Dans le présent travail, on présente l'adaptation de ces algorithmes à des fins d'utilisation dans l'industrie des sables bitumineux. Des méthodes reposant sur la RMN ont été mises au point pour la détermination de la teneur en eau et en bitume dans des échantillons de minerai et d'écume. On a utilisé des algorithmes consistants pour analyser plus de 500 échantillons de minerai et 50 échantillons d'écume venant des sables bitumineux d'Athabasca dans le nord de l'Alberta. Des analyses préliminaires sont présentées dans le cadre de la détermination des fluides in situ au moyen de sondes de RMN et d'une régulation de procédé amélioré dans les usines de traitement des sables bitumineux.

... Wettability and Heavy Oil Recovery Another consequence of alkali and/or surfactant injection into ... rock and surfactant have opposite charges18, however even with similarly charged surfactants and rocks ... to the rock surfaces and further water injection after AS flooding may no ...

... at the water wet condition, oil can still adhere to the glass in the absence of surfactant. ... With the addition of alkali before agitation (Figure 3), the remarkable difference is the flat oil ... The coreflooding experiments were designed to test if emulsions could form due to the shear forces ...

Summary The oil sands mining and extraction processes in Canada produce large volumes of tailings that are a mixture of mainly water, clay, sand, chemicals and bitumen. This mixture is transported to tailings ponds, where gravity segregation occurs. During this process, a ...