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 “"Near-wellbore"”.
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Modeling of Multiphase Flow in the Near-Wellbore Region of the Reservoir under Transient Conditions
… the dynamic interactions between reservoir and wellbore cannot be ignored, especially during transient flow in the near-wellbore region. As gas hydrocarbons are produced from underground reservoirs to the surface, liquids can come from condensate dropout, water break-through from the reservoir, …
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Numerical Modeling of CO2 Non-Dracy Flow in a Petroleum Reservoir
… accurate description of non-Darcy flow at the near wellbore region. Objectives of the research will be to characterize properties of non-Darcy flow and develop accurate descriptions of carbon dioxide (CO2) flow during injection scenarios and oil flow during production. Other objectives will be …
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Phase Equilibria in Systems Containing Hydrocarbon, Water and Methanol
… show extensive productivity reduction because of near wellbore condensate buildup. The phase behavior of systems containing hydrocarbon, water and methanol was reviewed based on past experimental work. The main objective of this report is to review experimental phase behavior data available for …
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Application of Dynamic Upscaling for Thermal Reservoir Simulation
… are coupled, it suggests that an increase in near wellbore reservoir heterogeneity, as indicated by a reduction in gridblock connectivity, has an increased impact upon the simulation results when compared to the impact of strictly length scale definition of heterogeneity. Additionally, the …
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Modeling Phase Change Heat Transfer of Liquid/vapor Systems in Free/porous Media
… here will further the understanding of the near wellbore flow of this two phase system in order to better predict solvent vaporization dynamics and heat rates delivered to the pay zone. This numerical study details the aspects of phase change of immiscible, two component, liquid/vapor …
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Establishing scale inhibitor retention mechanisms in pure adsorption and coupled adsorption/precipitation treatments
… carbonate and sulphate scales in reservoir and near wellbore formation is by applying scale inhibitor (SI) squeeze treatments. The two main mechanisms that govern the scale inhibitor retention and release process in the formation are by adsorption/desorption and precipitation/dissolution. They …
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Methods and systems for ballooned hydraulic fractures and complex toe-to-heel flooding
… minimize stress anisotropy and thereby maximize near wellbore complexity. This study used an advanced commercial reservoir simulator to evaluate the feasibility of CTTHF and OZF. Conventional Toe-to-Heel Waterflooding was used as a point of comparison in evaluating CTTHF. Zipper Frac, Alternate …
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Factors impacting the transport and enhanced oil recovery potential of polymeric nanogel in sandstone
… to study how different factors would affect the near-wellbore transport of nanogel. It is found that nanogel in lower salinity environment or high concentration results in higher resistance factors. The nanogel injectivity increases with the permeability but has no noticeable impact by the driven …
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Investigation of changes in permeability due to poro-thermo-elastic effects in enhanced geothermal reservoirs
… hence the permeability is evident predominantly near wellbore region in the early circulation period. Over longer period, a significant part of the reservoir, through which circulation is well established, is subjected to larger thermal stresses. These thermal stresses consequently increased …
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Effect of surfactants and brine salinity and composition on spreading, wettability and flow behavior in gas-condensate reservoirs
… wettability using low-cost surfactants in the near wellbore region, to prevent the gas flow problems associated with condensate buildup. This study also examines the effect of brine salinity and composition on wettability, spreading and adhesion in condensate buildup regions, to evaluate the …
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New Models and Analysis Techniques for Diagnostic Fracture Injection Tests
… closure. This may be attributed to increased near wellbore tortuosity. Furthermore, this dissertation introduces an innovative approach for calculating formation permeability and reservoir pressure by analyzing the rebound pressure observed following pump-in/flowback tests. This approach …
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Geophysical characterization of the effects of fractures and stress on subsurface reservoirs
… general seismic response of a fracture with a linear slip boundary and introduce the fracture sensitivity wave equation for optimal time-lapse survey design. Based on the characteristics of scattering from fractures, we develop an approach to determine the fracture properties using scattered …
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Integration of Numerical Simulation and Wireline Formation Testing Measurements for Permeability Interpretation
… measurements. In this study, a high-resolution near-wellbore numerical model has been developed to simulate the fluid sampling process together with transient pressures at a flowing WFT probe. This newly developed model is validated analytically and then with the field data from the deepwater …
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Drilling fluids filtration and impact on formation damage.
… model for field applications to simulate the near-wellbore damage before drilling in terms of well performance integrated from laboratory core test analysis is still not available. In recent times, the oil industry has shown increasing awareness towards maintaining optimum well productivity …
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Rheology and Flow Behaviour of Non-Newtonian, Polymeric Fluids in Capillaric and Porous Media: Aspects Related to Polymer Flooding for Enchanced Recovery of Heavy Oil
… at higher injection rate (easier to inject near wellbore) and higher Fr values at in-situ, reservoir flow rates, i.e. 0.3 m/d (1 ft/d). Immiscible displacement tests from 1D sandpacks showed accelerated recovery from floods employing HAP polymers over HPAM polymers and incremental polymer …
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Simulation and optimisation of hydraulic fracturing and flowback in unconventional reservoirs: A case study in the Cooper Basin, South Australia
… operational costs which, typically, represents nearly half of the total project cost. Also, the downturn in the pricing of oil and gas over the past few years requires production companies to optimise their production methods in order to increase the volume of production without significantly …
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A generalized finite element method for the simulation of non-planar three-dimensional hydraulic fracture propagation
… of the in-situ confining stresses, presence of a nearby natural fracture/fault, transport of suspended proppant particles within the fracture etc. In this work, we develop a fully-coupled system of equations for modeling non-planar three-dimensional hydraulic fracture propagation with a …
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Exploring anisotropy in rock fluid flow and elastic behavior
… and the Amadei solution to stress around a wellbore to demonstrate the importance of the incorporation of anisotropic elastic rock properties in geomechanical modeling of shale formations (Kirsch, 1898; Amadei, 1983). This is done through a case study of a horizontal well in the Lower …