The environmental impact of bitumen mining in the Athabasca region of Canada is of growing concern. Among these concerns is the need and difficulty to remediate and reclaim affected land, including tailing sands (TS), a byproduct of the hot water extraction used to separate bitumen from solid materials. Current reclamation methods consist of multiple steps and take several decades to be effective. The primary reason for the difficulty in reclaiming disturbed land is the harsh environment found within the TS combined with the scale of the problem. TS are extremely nutrient poor, having below-detectable levels of NPK and extremely low C and S. In addition to this TS have pHs outside of environmental normals, and are hydrophobic due to residual hydrocarbons. Previously, an endophytic fungus, Trichoderma harzianum strain TSTh20-1, was isolated from pioneer plants growing naturally on TS sites, and was found to promote plant growth on TS. In my study TSTh20-1 was also found to increase the rate of drought recovery, and to enhance seed germination rates on a variety of soils. Suitable application methods were explored for this endophyte, including seed coatings, granules, as well as direct application to plant/soil. Regardless of method, TSTh20-1 was found to successfully colonize the plants. Twenty-four species of grasses, forbs, and legumes were tested for their ability to grow on TS. The four most successful species (Trifolium repens, Bouteloua gracilis, Medicago sativa, and Elymus trachycaulus) were put into a seed mixture for use in experiments. In mesocosm-scale experiments, plant health and soil parameters were measured after 2 months of growth. Hydrocarbon analysis of the first mesocosm showed a 2.7-fold increase in total hydrocarbons when TSTh20-1 and plants were present, suggesting degradation of large hydrocarbons beyond the scope of the analysis. A repeat experiment using a different source of tailings did not yield this same result. This is most likely due using a source of tailings that had substantially different chemical characteristics. TSTh20-1 was also analyzed for its ability to produce plant hormones or siderophores, to increase peroxidase enzyme activity, to protect plants from reactive oxygen species, and to solubilize phosphate precipitates from soil. All of these are known mechanisms microbes use to promote plant growth.

Understanding the internal organization of the Lower Pleistocene 8 Sand reservoir in the Green Canyon 18 field, Gulf of Mexico, helps to increase knowledge of the geology and the petrophysical properties, and hence contribute to production management in the area. Interpretation of log data from 29 wells, core and production data served to detail as much as possible a geological model destined for a future reservoir simulation. Core data showed that the main facies resulting from fine-grained turbidity currents is composed of alternating sand and shale layers, whose extension is assumed to be large. They correspond to levee and overbank deposits that are usually associated to channel systems. The high porosity values, coming from unconsolidated sediment, were associated to high horizontal permeability but generally low kv/kh ratio. The location of channel deposits was not obvious but thickness maps suggested that two main systems, with a northwest-southeast direction, contributed to the 8 Sand formation deposition. These two systems were not active at the same time and one of them was probably eroded by overlying formations. Spatial relationships between them remained unclear. Shingled stacking of the channel deposits resulted from lateral migration of narrow, meandering leveed channels in the mid part of the turbidite system. Then salt tectonics tilted turbidite deposits and led to the actual structure of the reservoir. The sedimentary analysis allowed the discrimination of three facies A, B and E, with given porosity and permeability values, that corresponded to channel, levee and overbank deposits. They were used to populate the reservoir model. Well correlation helped figure out the extension of these facies.

Systems methodologies are employed to investigate strategic decision problems regarding the development of the oil sands in Canada. Many countries believe energy to be one of their most important national security factors in today’s competitive global era. Canada is no exception. Energy is an issue in Canadians’ growing concerns related to the conflicting priorities of its economy, environment, and society. Various studies have tried to map out Canada’s establishment as an energy superpower. In particular, the massive resources in Canada must be considered as competitive advantages, and oil sands (tar sands) constitute one of the most crucial elements in terms of non-renewable energy. This thesis describes Canada’s oil sands – their characteristics, cost and market analysis, as well as social, economic, and environmental impacts – in order to clarify conflicts that have arisen in recent years. In addition, the importance, potential, and constraints of the oil sands are examined as leading drivers to the country becoming an energy superpower and are compared with the Canadian Academy of Engineering (CAE)’s studies and recommendations. Multiple-criteria decision analyses based on the ProGrid methodology are carried out at different levels to clarify the structure and current position of Canada’s energy system. An Evaluation Matrix, including multiple criteria, is built, and language ladders with different weights are established to allow various groups of experts to evaluate available options. Based on their evaluations, the strong and weak points of the oil sands are analyzed. At a more detailed level, alternative solutions for water quantity and quality problems in Canada’s oil sands are prioritized with respect to specific criteria, using the ProGrid methodology. The strategic issues in Canada’s oil sands are addressed at different levels, and priorities for decision-making are determined and discussed to guide Canada in becoming an energy superpower.

This paper explores representations of nature that emerge through the ecological management of Mildred Lake, Syncrude’s Alberta-based oil sands extraction facility. Examining the ways Mildred Lake’s ecology has been re-presented by site eco-management teams, I argue that technologically produced visions help reproduce the regime of power infusing a state-sanctioned scientific practice of eco-management. ‘Using governmentality theory, Chapter 1 contextualizes activities at Mildred Lake: I show how the Alberta government, tethering the growth of the oil sands to technological innovation, submits eco-management questions to a capital-driven state-developmental framework. Chapter 2 examines how state-sanctioned science is discursively performed through eco-management acts. Chapter 3 uses a case study approach to consider three Mildred Lake eco-management projects: Beaver Creek, the Tailings Pond, and reclamation. While Mildred Lake’s eco-management practices cannot withstand critical scrutiny, they reveal the culturally and ecologically significant transformations of nature required to sustain authority amid the destructive effects of bitumen extraction.

In December, 2002, the oil sands of Alberta, Canada – earlier seen as an obscure, obstacle-ridden scientific project – were for the first time included in the Oil & Gas Journal’s year-end review of worldwide oil reserves. To explain this decision, the editors of this prestigious international petroleum magazine cited the basic neoclassical economic theory of price-driven resource substitution. This thesis contends, however, that the neoclassical theory in fact explains very little of how it became possible to profitably extract petroleum from Alberta’s bitumen-saturated sands. Merging insights from resources geography on the politics of nature-based production with scholarship on calculation and classification in Science and Technology Studies, this thesis fleshes in much-needed detail and dimension to the neoclassical account by emphasizing the role of key actors and decision-makers, many within the state but also within the private sector, who have actively negotiated supply costs and pursued technological strategies for the oil sands. In doing so, it argues that market prices and supply costs are not independent objects, but are underpinned by a malleable, contingent, and profoundly political process. As evidence, this thesis draws on national and international petroleum statistics, industry publications and public relations campaigns, as well as over 80 years of archived and more contemporary government documents, in order to show that substitution between two materially different resources is rarely an independently propelled or inevitable response.

This paper explores representations of nature that emerge through the ecological management of Mildred Lake, Syncrude’s Alberta-based oil sands extraction facility. Examining the ways Mildred Lake’s ecology has been re-presented by site eco-management teams, I argue that technologically produced visions help reproduce the regime of power infusing a state-sanctioned scientific practice of eco-management. ‘Using governmentality theory, Chapter 1 contextualizes activities at Mildred Lake: I show how the Alberta government, tethering the growth of the oil sands to technological innovation, submits eco-management questions to a capital-driven state-developmental framework. Chapter 2 examines how state-sanctioned science is discursively performed through eco-management acts. Chapter 3 uses a case study approach to consider three Mildred Lake eco-management projects: Beaver Creek, the Tailings Pond, and reclamation. While Mildred Lake’s eco-management practices cannot withstand critical scrutiny, they reveal the culturally and ecologically significant transformations of nature required to sustain authority amid the destructive effects of bitumen extraction.

As the Oil Sands in Northern Alberta continue to develop and new companies take up leases, they continue to fragment the region’s communities and landscape. Rather than continuing the trend of subdividing the lands and the population, through isolated workers camps, this thesis proposes a moving city that can follow industry, remediate its path and reconnect the community through its processes. Large scale canopies will cover past mining and tailings sites to create micro-climates and harvest energy through solar updraft. The elevated temperatures under the canopies will provide improved climatic conditions for human inhabitation and a bioremediation industry. Beneath the canopy, the inhabitants will be free to ‘plug-in’ to the provided infrastructure with their own version of ‘home’. A stronger attachment to the community, between people, and new clean industries that the population can find pride in, will vastly improve the reputation of the region.

Within the middle McMurray exposures along the Steepbank River (Steepbank River Outcrops 3 and 4), nine recognized facies can be divided into three genetically related groups: sand-dominated facies, inclined heterolithic stratification (IHS) facies and mixed heterolithic facies. Together, these facies are interpreted to represent a fluvially dominated, tidally influenced point bar that experienced strong seasonal variation in river discharge. Annual fluctuations between river-flood stage and low-flow stage are responsible for the deposition of fluvially dominated sand beds alternating with brackish, tidally influenced mud beds that cover the point-bar surface as members of the various IHS facies. The dichotomy of fluvially dominated sand deposition and brackish-water ichnology of the mud beds represents the annual migration in position of the tidal and salinity nodes caused by fluctuations in fluvial discharge. Recognition of metre-scale cycles (MSCs) of alternating sandier and muddier intervals within the IHS facies imply that decadal climate cycles, likely caused by fluctuations in ocean and/or solar dynamics, influenced point-bar deposition. These MSC packages are defined by an upward decrease in sand-bed thickness, an upward increase in mud-bed frequency, and an upward increase in bioturbation intensity, all occurring on a metre scale. MSCs are an important architectural element of these large-scale tidal-fluvial point bars because they are predictable, repeatable and continuous around the point bar. Analysis of paleocurrents relative to inclined-heterolithic-stratification bedding planes indicates that bend-flow modifications (BFMs) were effective in redistributing flow around the point bar. Furthermore, this suggests that Outcrop 3 is representative of an upstream-to-bend-apex transition within a large-scale point-bar planform. Recognition of multiple channels at Outcrop 4 was based on large-scale erosional truncation, IHS bed-orientation changes, large cumulative thicknesses of the middle McMurray, thick sand-package thicknesses, changes in relative scale of sedimentary structures, and the occurrence of large mud clasts. Similarities in depositional expression between channels suggest autogenic channel stacking (within-valley stacking), rather than the stacking of separate valleys. Finally, discordant paleocurrents within the basal sand-dominated facies are likely representative of amalgamated channel-bottom facies from several generations of channel. This suggests that only the upper intervals of basal sand-dominated facies are genetically linked to the overlying IHS facies. / Thesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2012-01-30 13:25:32.53

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