+publisher:"Colorado School of Mines" +contributor:("Amery, Hussein A., 1958-")

Colorado School of Mines

1. Ibrahim, Hamed D. Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site.

Degree: MS(M.S.), Geology and Geological Engineering, 2013, Colorado School of Mines

URL: http://hdl.handle.net/11124/79462

► Subsurface solute transport models can be cost effective tools for predicting the transport of contaminants in groundwater. High resolution hydraulic conductivity (HRK) data obtained from… (more)

Subjects/Keywords: contaminant transport; upscaling; non-local; dispersivity; dispersion; Groundwater – Pollution; Transport theory; Hydrodynamics; Diffusion in hydrology; Mathematical models

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APA (6^th Edition):

Ibrahim, H. D. (2013). Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/79462

Chicago Manual of Style (16^th Edition):

Ibrahim, Hamed D. “Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site.” 2013. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/79462.

MLA Handbook (7^th Edition):

Ibrahim, Hamed D. “Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site.” 2013. Web. 05 Mar 2021.

Vancouver:

Ibrahim HD. Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site. [Internet] [Masters thesis]. Colorado School of Mines; 2013. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/79462.

Council of Science Editors:

Ibrahim HD. Comparison of Fickian and temporally non-local transport theories using high resolution hydraulic conductivity from the Macrodispersion Experiment (MADE) Site. [Masters Thesis]. Colorado School of Mines; 2013. Available from: http://hdl.handle.net/11124/79462

Colorado School of Mines

2. Nazminia, Cameron. Mining in Afghanistan: a pathway for development and modernization.

Degree: MS(M.S.), Liberal Arts and International Studies, 2012, Colorado School of Mines

URL: http://hdl.handle.net/11124/76637

► Afghanistan, a nation battered after three decades of war and conflict, has a new opportunity to reset the calculus on its internal and regional insecurities… (more)

Subjects/Keywords: Afghanistan; development; Mes Aynak; mining; modernization theory; Afghanistan National Development Strategy; Mines and mineral resources – Afghanistan; Prospecting – Afghanistan; Economic development – Afghanistan

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APA (6^th Edition):

Nazminia, C. (2012). Mining in Afghanistan: a pathway for development and modernization. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/76637

Chicago Manual of Style (16^th Edition):

Nazminia, Cameron. “Mining in Afghanistan: a pathway for development and modernization.” 2012. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/76637.

MLA Handbook (7^th Edition):

Nazminia, Cameron. “Mining in Afghanistan: a pathway for development and modernization.” 2012. Web. 05 Mar 2021.

Vancouver:

Nazminia C. Mining in Afghanistan: a pathway for development and modernization. [Internet] [Masters thesis]. Colorado School of Mines; 2012. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/76637.

Council of Science Editors:

Nazminia C. Mining in Afghanistan: a pathway for development and modernization. [Masters Thesis]. Colorado School of Mines; 2012. Available from: http://hdl.handle.net/11124/76637

3. Genc, Mihriban. Sustainable water management and planning for the Akarçay River Basin, Turkey.

Degree: MS(M.S.), Humanities, Arts and Social Sciences, 2019, Colorado School of Mines

URL: http://hdl.handle.net/11124/173979

► Water underpins the survival of the ecosystem and of human civilization, which exists within a certain delicate balance. Water is especially crucial to the economic… (more)

▼ Water underpins the survival of the ecosystem and of human civilization, which exists within a certain delicate balance. Water is especially crucial to the economic development of developing countries that happen to have limited water supplies. The state of Turkey once called Asia Minor for its large size, has relatively more freshwater supplies than most countries in the Middle East. However, the interior of Turkey, in which the Akarçay Basin is located is water scarce. The Akarçay River Basin, one of 25 rives basins in Turkey, is located in a semi-arid region of the country. It has several towns and villages as well as a thriving agricultural sector, in addition to some manufacturing, mining, and tourism. The basin has two large lakes around which lots of fruits and vegetables are grown for local consumption and for exporting to the rest of Turkey. The hydrological pressures in this basin have been mounting due to physical water scarcity, elevated water needs of the domestic and agricultural sectors, rising frequency of droughts, and declining water quality due to high levels of pollution. Despite the agricultural importance of the Akarçay Basin, there is a dearth of studies in water resources planning and management. This thesis seeks to assess the status of water management in the Akarçay Basin and to develop policy options for sustainable management of water resources in this important region. The research also analyzes institutional and planning frameworks of how river basins have been managed in Turkey and examines actors and institutions, historical experiences, and geographic contexts of two basins in developed countries, the Colorado River Basin in North America and the Murray-Darling Basin in Australia, as well as water challenges in two developing countries, namely Iran, and Saudi Arabia in the Middle East. This multiple case study approach is useful in understanding successful water management practices that can provide insights for decision-makers in the Akarçay Basin. The thesis finds that over the last few decades, water resources in the Akarçay Basin have been managed unsustainably. This is mostly due to poor governance and government indecision in finalizing a modern comprehensive water law. Furthermore, it finds that the basin has a complex water management system where responsibilities are not well-defined. That is to say; numerous institutions have overlapping responsibilities that often do not coordinate with one another. In addition, climate change is projected to affect the availability of water supplies in the basin adversely. Finally, the thesis proposes a few policy recommendations for how to sustainably manage water supplies in the basin. Advisors/Committee Members: Amery, Hussein A., 1958- (advisor), Kroepsch, Adrianne (committee member), Singha, Kamini (committee member).

Subjects/Keywords: IWRM; sustainability; water management; river basin management; Akarcay Basin; Turkey

…Arts and Social Sciences Division (HASS), Colorado School of Mines. My academic and…

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APA (6^th Edition):

Genc, M. (2019). Sustainable water management and planning for the Akarçay River Basin, Turkey. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/173979

Chicago Manual of Style (16^th Edition):

Genc, Mihriban. “Sustainable water management and planning for the Akarçay River Basin, Turkey.” 2019. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/173979.

MLA Handbook (7^th Edition):

Genc, Mihriban. “Sustainable water management and planning for the Akarçay River Basin, Turkey.” 2019. Web. 05 Mar 2021.

Vancouver:

Genc M. Sustainable water management and planning for the Akarçay River Basin, Turkey. [Internet] [Masters thesis]. Colorado School of Mines; 2019. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/173979.

Council of Science Editors:

Genc M. Sustainable water management and planning for the Akarçay River Basin, Turkey. [Masters Thesis]. Colorado School of Mines; 2019. Available from: http://hdl.handle.net/11124/173979

Colorado School of Mines

4. Aljihrish, Khalid. International market power in oil and strategic responses to climate policy.

Degree: PhD, Economics and Business, 2015, Colorado School of Mines

URL: http://hdl.handle.net/11124/20151

► Effective sub-global initiatives to limit carbon emissions will result in substantial changes in the international demand for fossil energy, and this transfers policy costs to… (more)

▼ Effective sub-global initiatives to limit carbon emissions will result in substantial changes in the international demand for fossil energy, and this transfers policy costs to energy exporters. Most quantitative analysis of carbon policy, however, does not consider Saudi Arabia's significant market power in crude oil. The literature largely ignores the fact that Saudi Arabia might change export markups in a way that mitigates the climate policy costs. Against this background, this dissertation addresses three primary concerns. First, under what conditions does Saudi Arabia have the ability to respond to oil demand shocks. Second, what are the impacts of a sub-global climate policy on regional welfare and carbon leakage levels and what are the effects of a Saudi strategic reaction on those levels. Third, to what extent can the climate coalition retaliate to Saudi Arabia's reaction and what are the results of this game between the coalition and Saudi Arabia on welfare and carbon leakage. We adopt a global numeric model based on GTAP data but modify it to consider the benchmark divergence between the marginal cost of producing crude oil in Saudi Arabia and the world price of crude oil. Under this consideration, we find that Saudi Arabia has ample scope for a strategic reaction to external climate policies. We find that Saudi Arabia's reaction significantly alters relative prices of fossil fuels and therefore the regional share of the climate policy burden. Increasing the relative price of oil, as a result of Saudi Arabia's strategic reaction, reduces consumption of oil globally and drives large reductions in carbon leakage. This comes at the expense of reductions in oil importers welfare, which a large portion of the coalition falls under. The coalition has market power on the oil import side and therefore has the incentive to retaliate to Saudi Arabia's reaction. We find historical evidence for an agreement between Saudi Arabia and the West, particularly the US, that answers the question of why the coalition and Saudi Arabia do not exercise their respective oil market power in the benchmark data. The dissolution of this agreement as a result of the coalition taking action on climate change creates the incentive for both parties, the coalition and Saudi Arabia, to exploit their oil market power. This break-down of the agreement leads to reduced welfare levels for both parties and increased carbon leakage. Advisors/Committee Members: Balistreri, Edward J. (Edward Jay) (advisor), Carbone, Jared C. (committee member), Eggert, Roderick G. (committee member), Amery, Hussein A., 1958- (committee member).

Subjects/Keywords: climate policy; general equilibrium; oil; energy economics; carbon leakage; market power

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APA (6^th Edition):

Aljihrish, K. (2015). International market power in oil and strategic responses to climate policy. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/20151

Chicago Manual of Style (16^th Edition):

Aljihrish, Khalid. “International market power in oil and strategic responses to climate policy.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/20151.

MLA Handbook (7^th Edition):

Aljihrish, Khalid. “International market power in oil and strategic responses to climate policy.” 2015. Web. 05 Mar 2021.

Vancouver:

Aljihrish K. International market power in oil and strategic responses to climate policy. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/20151.

Council of Science Editors:

Aljihrish K. International market power in oil and strategic responses to climate policy. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/20151

Colorado School of Mines

5. Alyoubi, Ahmad H. High performance computational algorithms for a class of integer and fractional evolutionary models.

Degree: PhD, Applied Mathematics and Statistics, 2015, Colorado School of Mines

URL: http://hdl.handle.net/11124/20276

► Evolutionary models that depend on space and time variables occur in many physical processes. A standard approach for such systems is based on a classical… (more)

▼ Evolutionary models that depend on space and time variables occur in many physical processes. A standard approach for such systems is based on a classical diffusion modeling which leads to integer derivatives in the time and spatial variables. However, it has been observed in the literature that in many single- and multi-phase flow cases, especially in complex porous media, it is appropriate to use anomalous sub-diffusion models. Such models can be described by a class of non-local in time fractional derivative partial differential equations (FPDEs). In various applications, such as reservoir management, understanding the long-time behavior and resolving fines structures of processes governed by such models are crucial from early design phase to production phase. Therefore, fine meshes with large degrees of freedom (DoF) are needed in associated computer models to obtain relatively accurate simulated physical processes. Consequently, for long time simulation, implicit time-stepping discretization methods (such as the Crank-Nicolson and implicit Euler) require a computationally prohibitive number of discrete time-steps. Such industrial standard approaches are inherently serial-in-time and require several days of simulation even using efficient parallel-in-space algorithms on high performance computing (HPC) environments. HPC systems provide a large number of processing cores with various limitations, in particular on the amount of memory available per compute node. The memory limitation leads to severe constraints for resolving fine spatial structures that require large DoF. Accordingly, long time simulation cannot be achieved within reasonable simulation time and computational cost. In this work, we avoid the time-stepping computational bottleneck by developing a class of efficient hybrid HPC algorithms that combines parallel in time and space tasks. Our approach facilitates careful balancing between parallel performance and the memory constraint to efficiently simulate evolutionary FPDEs. We demonstrate the parallel HPC performance of the algorithm for several space-time evolutionary models using several millions of spatial DoF. We validate our HPC framework for efficient simulation of a class of fractional-Darcy's law based single-phase flow models, with potential application to develop a new generation of reservoir simulators. Advisors/Committee Members: Ganesh, Mahadevan (advisor), Amery, Hussein A., 1958- (committee member), Han, Qi (committee member), Mehta, Dinesh P. (committee member), Tenorio, Luis (committee member).

Subjects/Keywords: fractional PDE; parallel-in-time-and-space; sub-diffusion models; high performance computing; anomalous-in-time; single-phase

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APA (6^th Edition):

Alyoubi, A. H. (2015). High performance computational algorithms for a class of integer and fractional evolutionary models. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/20276

Chicago Manual of Style (16^th Edition):

Alyoubi, Ahmad H. “High performance computational algorithms for a class of integer and fractional evolutionary models.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/20276.

MLA Handbook (7^th Edition):

Alyoubi, Ahmad H. “High performance computational algorithms for a class of integer and fractional evolutionary models.” 2015. Web. 05 Mar 2021.

Vancouver:

Alyoubi AH. High performance computational algorithms for a class of integer and fractional evolutionary models. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/20276.

Council of Science Editors:

Alyoubi AH. High performance computational algorithms for a class of integer and fractional evolutionary models. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/20276

Colorado School of Mines

6. Newhart, Kathryn B. Data-driven process monitoring and control in municipal wastewater treatment.

Degree: PhD, Civil and Environmental Engineering, 2020, Colorado School of Mines

URL: http://hdl.handle.net/11124/175340

► The American Society of Civil Engineers estimates that by 2040, water and wastewater infrastructure (e.g., treatment facilities, conveyance systems) in the United States will require… (more)

▼ The American Society of Civil Engineers estimates that by 2040, water and wastewater infrastructure (e.g., treatment facilities, conveyance systems) in the United States will require $144 billion to repair, replace, and upgrade. As water demand increases and stringent nutrient regulations are implemented, facilities will be forced to intensify existing operations or face costly process additions. Data-driven process monitoring and control is an underdeveloped paradigm in the treatment industry that could help address the growing infrastructure investment gap by improving the accuracy and precision with which water and wastewater are treated. Conventional wastewater treatment plants (WWTP) use relatively simple control systems compared to other process control industries (e.g., energy, manufacturing). “Normal” is demarcated by operator-determined thresholds on individual process variables; the upper and lower limits span a sufficiently large range to allow for some operational and environmental variability to water quality and quantity. Often these thresholds are so generous, process efficiency, and in some cases quality, is negatively impacted before an operator can respond to a fault or failure. Automated process adjustments are also limited by simple control logic, and process models lack the accuracy for real-time control. This frequently results in excessive energy and chemical use to safely operate in the event of a rapid and unexpected process upset. To improve the accuracy of monitoring and control, control strategies must consider the real-time multivariate and dynamic features of water treatment. This dissertation investigates multiple statistical and machine learning approaches to address control challenges faced by full-scale WWTP. First, a literature review details and compares state-of-the-art and state-of-the-industry WWTP monitoring and control methods. Second, multivariate statistical process control methods and adaptations are compared to identify faults in a decentralized WWTP. Third, a full-scale biological treatment process is (i) quantitatively assessed for stability and (ii) modeled to forecast ammonia for advanced control. Fourth, disinfection performance is modeled to adapt to changing water quality at a full-scale WWTP. Each chapter considers the realities of designing real-time monitoring and control using nonstationary, autocorrelated, and missing data, and solutions are proposed that use traditional and novel data science tools. Advisors/Committee Members: Cath, Tzahi Y. (advisor), Hering, Amanda S. (advisor), Munakata Marr, Junko (committee member), Bellona, Christopher (committee member), Amery, Hussein A., 1958- (committee member).

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APA (6^th Edition):

Newhart, K. B. (2020). Data-driven process monitoring and control in municipal wastewater treatment. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/175340

Chicago Manual of Style (16^th Edition):

Newhart, Kathryn B. “Data-driven process monitoring and control in municipal wastewater treatment.” 2020. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/175340.

MLA Handbook (7^th Edition):

Newhart, Kathryn B. “Data-driven process monitoring and control in municipal wastewater treatment.” 2020. Web. 05 Mar 2021.

Vancouver:

Newhart KB. Data-driven process monitoring and control in municipal wastewater treatment. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2020. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/175340.

Council of Science Editors:

Newhart KB. Data-driven process monitoring and control in municipal wastewater treatment. [Doctoral Dissertation]. Colorado School of Mines; 2020. Available from: http://hdl.handle.net/11124/175340

Colorado School of Mines

7. Sassi, Muhsen Awad. Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads.

Degree: PhD, Civil and Environmental Engineering, 2016, Colorado School of Mines

URL: http://hdl.handle.net/11124/170630

► Horizontal Axis Wind Turbines (HAWT) may experience catastrophic failures due to very strong wind and/or seismic loads. Such loads, if not properly addressed, may result… (more)

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APA (6^th Edition):

Sassi, M. A. (2016). Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170630

Chicago Manual of Style (16^th Edition):

Sassi, Muhsen Awad. “Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads.” 2016. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/170630.

MLA Handbook (7^th Edition):

Sassi, Muhsen Awad. “Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads.” 2016. Web. 05 Mar 2021.

Vancouver:

Sassi MA. Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2016. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/170630.

Council of Science Editors:

Sassi MA. Nonlinear dynamic analysis of wind turbine towers subject to design wind and seismic loads. [Doctoral Dissertation]. Colorado School of Mines; 2016. Available from: http://hdl.handle.net/11124/170630

Colorado School of Mines

8. Ibrahim, Hamed D. Culture, transboundary river negotiations, and the problem of implementation of agreement.

Degree: MS(M.S.), Liberal Arts and International Studies, 2012, Colorado School of Mines

URL: http://hdl.handle.net/11124/171922

Subjects/Keywords: Conflict management; Riparian rights – Tigris River; Riparian rights – Amazon River Region; Riparian rights – Lesotho; Boundary disputes – Peru – Brazil; Boundary disputes – Turkey; International relations

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APA (6^th Edition):

Ibrahim, H. D. (2012). Culture, transboundary river negotiations, and the problem of implementation of agreement. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/171922

Chicago Manual of Style (16^th Edition):

Ibrahim, Hamed D. “Culture, transboundary river negotiations, and the problem of implementation of agreement.” 2012. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/171922.

MLA Handbook (7^th Edition):

Ibrahim, Hamed D. “Culture, transboundary river negotiations, and the problem of implementation of agreement.” 2012. Web. 05 Mar 2021.

Vancouver:

Ibrahim HD. Culture, transboundary river negotiations, and the problem of implementation of agreement. [Internet] [Masters thesis]. Colorado School of Mines; 2012. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/171922.

Council of Science Editors:

Ibrahim HD. Culture, transboundary river negotiations, and the problem of implementation of agreement. [Masters Thesis]. Colorado School of Mines; 2012. Available from: http://hdl.handle.net/11124/171922

Colorado School of Mines

9. Ilgadi, Otman B. Advanced three-dimensional analysis of concrete structures using nonlinear truss models.

Degree: PhD, Civil and Environmental Engineering, 2013, Colorado School of Mines

URL: http://hdl.handle.net/11124/80357

► A three-dimensional truss-based simulation of reinforced concrete is presented in this study. The truss model has been implemented to simulate the response of columns under… (more)

▼ A three-dimensional truss-based simulation of reinforced concrete is presented in this study. The truss model has been implemented to simulate the response of columns under compression, shallow beams under bending, and deep beams under shear. The concrete truss elements are modeled based on advanced constitutive equations that account for confinement dependent hardening followed by softening. The reinforcing steel is modeled as an elastoplastic material, while the steel-concrete interface is modeled as one of perfect bonding. A computer program with an elaborate graphical interface was developed to implement this model. The program includes a three-dimensional mesh generation, a pre- and post-processing interface, and a computational component that implements a non-linear iterative finite element solution. The computational advantages, as well as the challenges of this approach are discussed. The model has been calibrated based on an extensive set of published experiments, which range in geometry, material parameters, loading, and levels of reinforcement. The validation of the truss model based on multiple experiments is followed by detailed observation on the progressive failure patterns that allow for improved insight of the mechanisms that eventually lead to the failure of columns, shallow beams and deep beams. This analysis verifies some well-established trends of ductility, strength, and failure pattern development. It also sheds new light on the limits of the contributions of transverse reinforcement to the strength and ductility of reinforced concrete elements. In conclusion, the model presented in this study is a useful research and design tool which enables the detailed analysis of reinforced concrete elements, where issues of strength, ductility, and progressive failure patterns can be examined. Advisors/Committee Members: Kiousis, Panagiotis Demetrios, 1956- (advisor), Amery, Hussein A., 1958- (committee member), Crocker, Joseph P. (committee member), Martin, P. A. (committee member), Wang, Judith (committee member).

Subjects/Keywords: Trusses, Concrete – Computer simulation; Structural failures – Mathematical models; Reinforced concrete; Strut-and-tie models; Lattice theory

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APA (6^th Edition):

Ilgadi, O. B. (2013). Advanced three-dimensional analysis of concrete structures using nonlinear truss models. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/80357

Chicago Manual of Style (16^th Edition):

Ilgadi, Otman B. “Advanced three-dimensional analysis of concrete structures using nonlinear truss models.” 2013. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/80357.

MLA Handbook (7^th Edition):

Ilgadi, Otman B. “Advanced three-dimensional analysis of concrete structures using nonlinear truss models.” 2013. Web. 05 Mar 2021.

Vancouver:

Ilgadi OB. Advanced three-dimensional analysis of concrete structures using nonlinear truss models. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2013. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/80357.

Council of Science Editors:

Ilgadi OB. Advanced three-dimensional analysis of concrete structures using nonlinear truss models. [Doctoral Dissertation]. Colorado School of Mines; 2013. Available from: http://hdl.handle.net/11124/80357

Colorado School of Mines

10. Mokhtari, Mehdi. Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability.

Degree: PhD, Petroleum Engineering, 2015, Colorado School of Mines

URL: http://hdl.handle.net/11124/17129

► Lamination and fractures are common features in organic-rich shales. The objective of this thesis is to determine the impact of lamination and fractures on elastic… (more)

▼ Lamination and fractures are common features in organic-rich shales. The objective of this thesis is to determine the impact of lamination and fractures on elastic properties, shear and tensile failures, and the permeability of organic-rich shales. The elastic properties of rocks determine the hydraulic fracture geometry. Elastic properties are independent of direction in isotropic rocks, thus they can be calculated with only two static or dynamic measurements. However, thin laminations at millimeter scale and bentonite layer at foot-scale cause directional dependency (anisotropy) in the elastic properties of Eagle Ford shale. Throughout the literature, it is usually assumed that the three oriented samples have identical properties when they are drilled closed to each other. However, this assumption is not valid for some Eagle Ford shale facies due to the presence of irregular thin laminations which can create heterogeneity in one-inch samples. We explain how the heterogeneity can generate error in the estimation of anisotropy, thus we recommend that characterization of heterogeneity is essential for anisotropic studies in shale formations. At the well scale, the estimation of the minimum horizontal stress in Eagle Ford shale was improved by including the effect of lamination in Eagle Ford shale and the characterization of a bentonite layer at the boundary of upper and lower Eagle Ford shale with high Poisson's ratio. Breakout is used to estimate the insitu stress orientation which is eventually used to determine the orientation of lateral landing for optimum hydraulic fracture performance. However, the compressive strength of Mancos and Green River shales at various lamination angles show dependency on lamination angle. It was found that the Mancos shale has the weakest compressive strength at the lamination angle of 60°. Moreover, the post-failure radial gauge recording and visual inspection of the shale samples show that the failure mechanism at 60° is by sliding on the lamination. The shear fracture pattern can impact wellbore stability and hydraulic fracture analyses. A planar tensile fracture is expected perpendicular to minimum horizontal stress based on the assumption of isotropic mechanical properties. However, complex fracture network can be created in organic-rich shales due to the presence of anisotropic and heterogeneous features. We examined how lamination and natural fractures can impact tensile failure pattern using Brazilian testing on Green River, Mancos and Niobrara shales. The tensile strength of calcite-filled fractures was obtained to be one-third of the matrix and the tensile strength along the lamination is almost half the tensile strength across the lamination in Green river shale. The tensile strength of Eagle Ford shale along the lamination is negligible due to the presence of microfractures generated during the maturation process. Moreover, calcite-filled fractures or laminations can be activated if the approaching angle is less than 30°. Including the tensile strength anisotropy and… Advisors/Committee Members: Tutuncu, Azra (advisor), Graves, Ramona M. (committee member), Gutierrez, Marte S. (committee member), Honarpour, Mehdi (committee member), Eustes, Alfred William (committee member), Amery, Hussein A., 1958- (committee member), Kazemi, Hossein (committee member).

Subjects/Keywords: fracture; tensile failure; permeability; organic-rich shale; elastic properties; anisotropy; Anisotropy; Shale – Testing; Rocks – Fracture; Permeability; Microseisms; Shale – Elastic properties

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APA (6^th Edition):

Mokhtari, M. (2015). Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/17129

Chicago Manual of Style (16^th Edition):

Mokhtari, Mehdi. “Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/17129.

MLA Handbook (7^th Edition):

Mokhtari, Mehdi. “Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability.” 2015. Web. 05 Mar 2021.

Vancouver:

Mokhtari M. Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/17129.

Council of Science Editors:

Mokhtari M. Characterization of anisotropy in organic-rich shales: shear and tensile failure, wave velocity, matrix and fracture permeability. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/17129

Colorado School of Mines

11. Alkuwairan, Maryam Y. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.

Degree: PhD, Geology and Geological Engineering, 2012, Colorado School of Mines

URL: http://hdl.handle.net/11124/70699

► The origin of dolomite has been enigmatic. It is a common constituent of carbonate hydrocarbon reservoirs, it is abundant in Phanerozoic sedimentary carbonate rocks, but… (more)

▼ The origin of dolomite has been enigmatic. It is a common constituent of carbonate hydrocarbon reservoirs, it is abundant in Phanerozoic sedimentary carbonate rocks, but dolomite is rare in Quaternary and Recent rocks. Many different models have been suggested to explain its origin. Authigenic dolomite has been found to be forming in the Persian Gulf, but rather in small quantities. Additionally, mixing of authigenic dolomite with allochthonous types has been difficult to characterize. While it is clear that dolomite forms under a wide range of geochemical conditions, this study focuses on the occurrence of dolomite in modern sediments in a restricted embayment (Kuwait Bay), whose sediments derive from multiple sources. In this study, recently developed quantitative mineralogical tools (QEMSCAN analyses) were used in conjunction with traditional approaches (XRD, SEM, whole-rock geochemistry, and isotope geochemistry) to characterize polygenetic dolomite types occurring in subtidal sediments in Kuwait Bay. This study is the first to employ these methods to characterize the sediment mineralogy and geochemistry. Dolomite occurs as both authigenic and detrital phases, and analytical techniques have allowed characterization of these different types of dolomite. Three distinct phases of dolomite are present in the sediments: stoichiometric dolomite, near-stoichiometric dolomite, and calcium-rich, poorly ordered dolomite (protodolomite). The data suggest that stoichiometric and near-stoichiometric dolomite are transported (allochthonous/detrital), while the protodolomite is most likely an in situ authigenic precipitate. Allochthonous/detrital dolomite occurs within composite grains that show evidence for transportation. They are typically in the 50 to 150 μm size fraction. The mineralogic composition and characteristics of the composite grains suggests two likely sources: eolian and fluvial. These detrital dolomites are extrabasinally sourced. However, isolated rhombohedra of pristine dolomite crystals are present in the sediments. These dolomite rhombs are typically less than 10 μm in diameter, and are calcium rich. They make up about 10% of the total dolomite in the sediments. Their origin is consistent with authigenic microbially mediated dolomite precipitation in organic-rich sediments in hypersaline waters. Advisors/Committee Members: Humphrey, John D. (advisor), Appleby, Sarah K. (committee member), Plink-Björklund, Piret (committee member), Amery, Hussein A., 1958- (committee member), Al-Zamel, Abdulla Z. (committee member).

Subjects/Keywords: sulphate reduction; quantitative mineralogy; dolomite; Kuwait Bay; organic-rich sediments; QEMSCAN

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alkuwairan, M. Y. (2012). Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/70699

Chicago Manual of Style (16^th Edition):

Alkuwairan, Maryam Y. “Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.” 2012. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/70699.

MLA Handbook (7^th Edition):

Alkuwairan, Maryam Y. “Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.” 2012. Web. 05 Mar 2021.

Vancouver:

Alkuwairan MY. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2012. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/70699.

Council of Science Editors:

Alkuwairan MY. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. [Doctoral Dissertation]. Colorado School of Mines; 2012. Available from: http://hdl.handle.net/11124/70699

Colorado School of Mines

12. Al-Sadhan, Nayef. Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes.

Degree: PhD, Petroleum Engineering, 2014, Colorado School of Mines

URL: http://hdl.handle.net/11124/17006

► Hydraulic fracturing is the most critical well stimulation technique used to increase well productivity. A successful hydraulic stimulation requires a fracture that is more conductive… (more)

▼ Hydraulic fracturing is the most critical well stimulation technique used to increase well productivity. A successful hydraulic stimulation requires a fracture that is more conductive than the surrounding formation. This conductivity is achieved by adding proppants to the fracturing fluids to keep the walls of the fracture propped open. Many resources have been allocated to improve hydraulic fracturing products, especially proppants since they play an integral role in the fracture's conductivity. One of these improvements is the ability to predict the expected conductivities over time of proppants of varying types and sizes. However, there are no publicly published conductivity equations that can produce such predictions considering multiple variables. Actual proppant conductivity test results, which were conducted for fifty hours, provided by Stim-Lab, Inc. (Duncan, OK) were used to develop short-term (zero to fifty hours) and long-term (beyond fifty hours) baseline proppant conductivity equations for sand, ceramic, resin coated sand, and resin coated ceramic proppants of varying sizes. Multiple regression analysis was performed on all provided data to develop these equations taking into account the effects of proppant concentration, temperature, closure stress, time, proppant median diameter, and proppant grain density. Statistically, the developed short-term equations were accurate with a multiple coefficient of determination (R2) in the 90% range, which indicated that the developed equations results strongly resemble actual conductivity values. These equations were also validated by performing a comparison between the predicted conductivity values produced by the short-term baseline conductivity equations and the available actual conductivity test results. Since Stim-Lab, Inc. did not conduct any long-term conductivity tests (weeks, months, and years), the validity of the long-term equations was established using two methods: Graphically, by comparing the shape of the curve of an actual nine-month test to a predicted long-term conductivity curve. Mathematically, by comparing the conductivity decline rates using the Kozeny-Carman equation to the decline rates developed for the long-term equations. These developed baseline conductivity equations will help identify the proppant type and size to use, based on the appropriate reservoir conditions, to attain optimum conductivity and therefore optimize the hydraulic fracture process and avoid investing in more expensive proppants with higher qualities that would add no value to a well's productivity. Advisors/Committee Members: Miskimins, Jennifer L. (advisor), Dahl, Carol A. (Carol Ann), 1947- (committee member), Amery, Hussein A., 1958- (committee member), Conway, Michael W. (committee member), Pence, Norman E. (committee member), Graves, Ramona M. (committee member), Yin, Xiaolong (committee member).

Subjects/Keywords: long-term conductivity; stimulation; short-term conductivity; proppant; hydraulic fracturing; conductivity; Hydraulic fracturing; Equations; Permeability; Particles – Testing; Multiphase flow; Regression analysis

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Al-Sadhan, N. (2014). Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/17006

Chicago Manual of Style (16^th Edition):

Al-Sadhan, Nayef. “Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes.” 2014. Doctoral Dissertation, Colorado School of Mines. Accessed March 05, 2021. http://hdl.handle.net/11124/17006.

MLA Handbook (7^th Edition):

Al-Sadhan, Nayef. “Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes.” 2014. Web. 05 Mar 2021.

Vancouver:

Al-Sadhan N. Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2014. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11124/17006.

Council of Science Editors:

Al-Sadhan N. Prediction of short-term and long-term baseline conductivity degradation for proppants of different types and sizes. [Doctoral Dissertation]. Colorado School of Mines; 2014. Available from: http://hdl.handle.net/11124/17006

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