Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Low salinity water"”.
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Novel insights into low salinity water flooding enhanced oil recovery in sandstone reservoirs
… recovery efficiency for several decades. Water flooding is extensively applied worldwide to improve oil recovery. The recent drop in oil prices has turned the oil industry to the cheapest improved oil recovery (IOR) techniques, such as low salinity (LS) waterflooding. Also, the reduction …
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Experimental study on enhanced oil recovery (EOR) mechanisms of nanogel combining with low salinity water for carbonate reservoirs
… and the synergetic effect between nanogel and low salinity water. Nanogel used in this study was synthesized through the suspension polymerization process in our lab. The morphology, size distribution, and zeta potential were studied for nanogel dispersed in brine with variable ionic strength. …
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The Effect of the Chemical Composition of Low Salinity Water on the Growth, Development, and Survival of Cultured Juvenile Blue Crabs
… for survival, growth and development in low salinity water containing various compositions of ions. ~rabs were isolated in separate containers and placed in thirty gallon aquaria containing 2ppt of ion solution. Temperature, ambient, humidity, and nitrite levels were monitored daily. …
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Comprehensive evaluation of a novel EOR method-coupling low salinity water flooding and preformed particle gel to enhance oil recovery in fractured reservoirs
<p>"Excess water production in oil fields is becoming a challenging economic and environmental problem as more reservoirs are maturing. Water channeling, one of the primary reservoir conformance problems, is caused by reservoir heterogeneities that lead to the development of high-permeability …
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Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media
… experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, the vapour condensation ahead of the imbibition front detaches …
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Laboratory study of the effect of chemical osmosis on the elastic rock properties of Pierre shale and implication for oil recovery
… measurements attributed to swelling during water intrusion into the Pierre shale matrix. Bulk modulus, Poisson's ratio, and shear failure envelope of Pierre shale were determined from measurements on several shale samples with varying clay content. The membrane efficiency of the shale …
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Mechanistic Modeling, Design, and Optimization of Low Salinity Waterflooding
Low Salinity Waterflooding (LSW) is an emerging attractive enhanced oil recovery (EOR) method because of its oil recovery performance and relatively simple, environmentally friendly implementation, when compared with conventional high salinity waterflooding and EOR approaches. Most studies on the …
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Organic fouling in membrane capacitive deionization systems
… double layer of porous electrodes. For most low-salinity water treatment technologies, fouling is a central issue, but few studies examine the its impact on MCDI. Fouling was evaluated using synthetic saline solutions with a combination of NaCl and CaCl2 and the model organic foulant sodium …
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Inversion Analysis of Time-Domain Controlled-Source Electromagnetic Data to Characterize Offshore Freshened Groundwater in the Canterbury Bight, New Zealand, and Offshore Maltese Islands
Offshore freshened groundwater (OFG) refers to low-salinity water stored in marine sediments beneath the seafloor. These water resources are gaining attention due to their potential role in future freshwater supply and their connection to past sea-level and climate changes. Marine controlled-source …
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Updated EOR screening criteria and modeling the impacts of water salinity changes on oil recovery
… rate at which new, promising EOR methods such as Low-salinity water flooding (LSWF) are being implemented is alarming. Despite, the potential of LSWF its development and application has been hindered by the lack of consensus concerning its recovery mechanism(s). Every oil reservoir has a unique …
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Hydrological and ecological observations along the eastern Beaufort Sea coast of Alaska
… that provide habitat for migratory fish and waterfowl that are essential to the subsistence and culture of Iñupiat communities of northern Alaska. In the eastern Beaufort, in particular, residents of Kaktovik rely heavily on the high benthic productivity of these lagoon systems to support the …
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A numerical study of the interaction of tidal flows in the Mersey estuary and Liverpool bay
A numerical model for coastal and estuary waters has been developed to study the dynamic processes in estuaries and shallow water. The model is based on joining together a multi-level two dimensional river model with a three-dimensional hydrodynamic bay model. An interactive sigma coordinate …
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Performance Evaluation of ionic Liquids in Enhanced Oil Recovery Using Numerical Simulation
… factor (RF), well bottom-hole pressure, oil cut, water cut and two-phase relative permeability curves. A sensitivity analysis was performed for the chemical injection rate, the chemical concentration, the slug size, and the initiation time while studying the effects of changing the oil viscosity, …
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Geophysical properties of carbon monoxide when used as an enhanced oil recovery agent
… the pore/pore throat in the presence of low salinity water. Carbon monoxide, however, has proven to be an effective iron reducer and successful in mitigating the clay swelling with respect to iron hydroxide hydration. It also exhibits phase properties that would allow the fluid to remain …
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Understanding ionic transport in the macrostructure of polysaccharide bound electrodes for capacitive deionization
… especially when it comes to treating low salinity water, such as groundwater. Lifetime and charge efficiency (CE) are the two metrics which determine the competitiveness of CDI technologies, which is why enhancing design is a major developmental challenge. It is known that ion-exchange …
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Insights into Glacial Terminations from a South Atlantic Perspective
… are used to reconstruct deep and intermediate water density for the first time. I demonstrate that timing of the major breakdown in the density gradient of the ocean significantly lagged the breakdown in the chemical gradient, suggesting that changes in the deep ocean density structure were not …
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A fine-scale volumetric census of the water masses of the Agulhas retroflection area
Two studies of the quantification of water masses around southern Africa are described in this thesis. The first, a pilot study, is concerned with the volumetric analysis of historic hydrographic data from the region off the South African west coast. It uses data that have been collected with …
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Dinoflagellate blooms and physical systems in the Gulf of Maine
… appears to have been formed off Maine by the outflow from the Androscoggin and Kennebec Rivers. Flow rates of these rivers, hydrographic sections, and satellite images suggest that the plume had a duration of about a month, and extended alongshore for several hundred kilometers. The distribution …
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Role of sulphates and chloride ions in improved oil recovery in a hybrid smart-low salinity flooding technique
… of versatility and wide scale applicability is Low salinity flooding, which is characterised by many mechanisms including fine migration, electrical double layer expansion, multivalent ionic exchange, and micro dispersion. Despite much research on theses mechanisms, sulphate ions facilitate the …