Utilizing geothermal energy from enhanced geothermal systems as a heat source for oil sands separation: A numerical evaluation

Energy ◽  
2021 ◽  
pp. 121676
Author(s):  
Xincheng Hu ◽  
Jonathan Banks ◽  
Yunting Guo ◽  
Wei Victor Liu
Keyword(s):  
Heat Source ◽  
Geothermal Energy ◽  
Oil Sands ◽  
Numerical Evaluation ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems

Evaluation of Engineered Geothermal Systems as a Heat Source for Oil Sands Production in Northern Alberta

2013 ◽  
Vol 23 (2) ◽  
pp. 247-265 ◽  
Author(s):  
V. Pathak ◽  
T. Babadagli ◽  
J. A. Majorowicz ◽  
M. J. Unsworth
Keyword(s):  
Heat Source ◽  
Oil Sands ◽  
Geothermal Systems ◽  
Northern Alberta ◽  
Engineered Geothermal Systems

scholarly journals 2D Forward Modeling Geothermal System Gravity Data in South Solok Region, West Sumatra

2021 ◽  
Vol 4 (1) ◽  
pp. 36-44
Author(s):  
Muhammad Nafian ◽  
Belista Gunawan ◽  
Nanda Ridki Permana
Keyword(s):  
Heat Source ◽  
Geothermal Energy ◽  
Gravity Data ◽  
Bouguer Anomaly ◽  
Filter Method ◽  
Geothermal System ◽  
Geothermal Systems ◽  
West Sumatra ◽  
Anomaly Map ◽  
Bouguer Anomaly Map

Indonesia has the greatest potential for geothermal energy in the world. Geothermal has an important role as an alternative fuel because it is a renewable energy source, but its use has not been maximized. One of the areas that have the greatest potential for geothermal energy in South Solok, West Sumatra. Therefore, this study was conducted to determine the geothermal system in the South Solok area, West Sumatra by using the gravity method. The gravity data processing stage requires some software to get the CBA value(Complete Bouguer Anomaly), map contours of the CBA. Anomaly separation with the butterworth filter method, determination of residual anomaly slice points, and 2D modeling of geothermal systems. Based on modeling, the qualitative interpretation interprets the Complete Bouguer Anomaly map which is suspected as a geothermal prospect area is a low anomaly ranging from 7.9 mgal - 9.4 mgal which is marked in dark blue. Meanwhile, quantitative interpretation produces modeling of the AB and CD slicing with a total of four layers. This layer consists of clay rock as a cap rock, sandstone as a reservoir, granite as a heated rock as a heat source, and the last layer in the form of magma as a heat source. The anomaly modeling of these two sections is dominated by granite rock with a density value of 2500 kg/m3 for the AB section and 2550 kg/m3 for the CD section.

scholarly journals Numerical simulation of hydraulic fracturing in enhanced geothermal systems considering thermal stress cracks

2021 ◽  
Author(s):  
Ziyang Zhou ◽  
Hitoshi MIKADA ◽  
Junichi TAKEKAWA ◽  
Shibo Xu
Keyword(s):  
Thermal Stress ◽  
High Temperature ◽  
Hydraulic Fracturing ◽  
Geothermal Energy ◽  
Confining Pressure ◽  
Numerical Results ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Compression Tests ◽  
High Confining Pressure

Abstract With the increasing attention to clean and economical energy resources, geothermal energy and enhanced geothermal systems (EGS) have gained much importance. For the efficient development of deep geothermal reservoirs, it is crucial to understand the mechanical behavior of reservoir rock and its interaction with injected fluid under high temperature and high confining pressure environments. In the present study, we develop a novel numerical scheme based on the distinct element method (DEM) to simulate the failure behavior of rock by considering the influence of thermal stress cracks and high confining pressure for EGS. We validated the proposing method by comparing our numerical results with experimental laboratory results of uniaxial compression tests under various temperatures and biaxial compression tests under different confining pressure regarding failure patterns and stress-strain curves. We then apply the developed scheme to the hydraulic fracturing simulations under various temperatures, confining pressure, and injection fluid conditions. Our numerical results indicate that the number of hydraulic cracks is proportional to the temperature. At a high temperature and low confining pressure environment, a complex crack network with large crack width can be observed, whereas the generation of the micro cracks is suppressed in high confining pressure conditions. In addition, high-viscosity injection fluid tends to induce more hydraulic fractures. Since the fracture network in the geothermal reservoir is an essential factor for the efficient production of geothermal energy, the combination of the above factors should be considered in hydraulic fracturing treatment in EGS.

scholarly journals Slates: a potential rock type to extract geothermal energy from the underground?

2020 ◽  
Author(s):  
Johannes Herrmann ◽  
Erik Rybacki ◽  
Wenxia Wang ◽  
Harald Milsch ◽  
Bianca Wagner ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Rock Type ◽  
Metamorphic Rocks ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
The European Union ◽  
Fracture Permeability ◽  
Horizon 2020 ◽  
Rock Types ◽  
Confining Pressures

<p>Commonly used host rock reservoirs for Enhanced Geothermal Systems (EGS) are composed of granite, as they display highly conductive and sustainable fracture networks after stimulation. However, considering the large amount of metamorphic rocks in Europe’s underground, these rock types may also show a large potential to extract geothermal energy from the subsurface. Within the framework of the European Union’s Horizon 2020 initiative ‘MEET (Multi-Sites EGS Demonstration)’, we are conducting fracture permeability experiments at elevated confining pressures, p<sub>c</sub>, temperatures, T, and differential stresses, </p>

scholarly journals Geothermal Energy R&D: An Overview of the U.S. Department of Energy’s Geothermal Technologies Office

2021 ◽  
Vol 143 (10) ◽  
Author(s):  
Susan G. Hamm ◽  
Arlene Anderson ◽  
Douglas Blankenship ◽  
Lauren W. Boyd ◽  
Elizabeth A. Brown ◽  
...  
Keyword(s):  
United States ◽  
Geothermal Energy ◽  
The United States ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Geothermal Resources ◽  
Future Directions ◽  
Electricity Grid ◽  
Strategic Goals ◽  
The U.S

Abstract Geothermal energy can provide answers to many of America’s essential energy questions. The United States has tremendous geothermal resources, as illustrated by the results of the DOE GeoVision analysis, but technical and non-technical barriers have historically stood in the way of widespread deployment of geothermal energy. The U.S. Department of Energy’s Geothermal Technologies Office within the Office of Energy Efficiency and Renewable Energy has invested more than $470 million in research and development (R&D) since 2015 to meet its three strategic goals: (1) unlock the potential of enhanced geothermal systems, (2) advance technologies to increase geothermal energy on the U.S. electricity grid, and (3) support R&D to expand geothermal energy opportunities throughout the United States. This paper describes many of those R&D initiatives and outlines future directions in geothermal research.

scholarly journals An analysis of thermodynamic properties in both traditional and enhanced geothermal systems to compare thermal efficiencies

2017 ◽  
Vol 4 ◽  
pp. 103-120
Author(s):  
Samuel Peter Martin ◽  
Alexander Richmond Perry ◽  
Kirill Lushnikov
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Geothermal Energy ◽  
Energy Production ◽  
Enhanced Geothermal Systems ◽  
System Efficiency ◽  
Geothermal Systems ◽  
Average Efficiency ◽  
Naturally Occurring ◽  
Geothermal Environments

This meta-study draws upon previous research on both Enhanced Geothermal Systems (EGS) and traditional geothermal systems (GS), using these findings to compare and investigate the thermal efficiency of each system. Efficiency calculations include reservoir enthalpy, maximum drilling well temperature, power output (per unit mass of liquid) and mass flow rate of these systems to determine whether EGS’s are viable as an alternative, more readily available renewable energy source. This meta-study suggests that EGS are more viable than naturally occurring GS in the context of future geothermal energy production as they perform with a similar average efficiency of 10-15% and, in addition, can be used in a wider range of geothermal environments.

scholarly journals Current trends in the development of geothermal resources

Georesursy ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 113-122
Author(s):  
Alexander N. Shulyupin ◽  
Natalia N. Varlamova
Keyword(s):  
Geothermal Energy ◽  
Technology Development ◽  
Local Heat ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Geothermal Resources ◽  
Current Trends ◽  
Geothermal Fields ◽  
The World ◽  
Development Processes

Based on the analysis of publications in world publications, as well as a generalization of the experience of developing domestic geothermal fields, current trends in the development of geothermal resources are shown. The key trend is considered to be the transition from subsidized to commercial projects, which increases the relevance of research in areas that have a significant impact on the economic efficiency of resource development processes, primarily in the direction of geothermal technologies. In terms of subsidized projects that set research goals, the most relevant are works in the direction of EGS (Enhanced Geothermal Systems). Moreover, there is a tendency towards the creation of international interdisciplinary collaborative research teams. It is noted that the current level of technology development allows producing geothermal energy for use in local heat supply systems practically anywhere in the world. However, given the concentration of power per unit area, the basis of modern geothermal energy is still the direction associated with the rise of deep fluids to the surface in areas characterized by the presence of ascending flows of hot juvenile fluids. It is indicated that Russia is lagging behind the world level of progress in the development of geothermal resources, including in terms of current research and development directions, and measures are proposed to overcome this lag.

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