scholarly journals Economic and Environmental Impacts of Geothermal Resource Development in Hunan, China

2021 ◽  
Vol 39 (2) ◽  
pp. 581-586
Author(s):  
Yanhong Tang ◽  
Xiangyang Deng
Keyword(s):  
Recovery Period ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Environmental Indices ◽  
Dynamic Investment ◽  
Well Yield ◽  
Single Well ◽  
Total Investment ◽  
Economic Indices ◽  
Winter Operation

The global warming and soaring energy consumption have motivated many scholars and policymakers to pursue energy conservation and environmental improvement. As a renewable cleaning energy, geothermal resources have been actively developed in recent years. Taking six geothermal projects in Hunan, China as examples, this paper determines the input and output indices for each project. The input indices cover both economic and environmental dimensions. Then, the authors deeply explored how much geothermal resource quantity, single-well yield, total investment, and annual cost investment influence dynamic investment recovery period, coal reduction of summer operation, coal reduction of winter operation, environmental protection and energy saving, standard coal reduction, and emission reduction. The results show that total investment, single-well yield, and total investment have significant effects on economic indices, while geothermal resource quantity, single-well yield, and total investment have significant effects on environmental indices.

scholarly journals Geothermal resource exploration by using Numerical simulation and comprehensive geophysical method

2021 ◽  
Author(s):  
Yang Yang ◽  
Bin Xiong ◽  
Sanxi Peng ◽  
Ibrar Iqbal ◽  
Tianyu Zhang
Keyword(s):  
Detection Efficiency ◽  
Energy Resource ◽  
Clean Energy ◽  
Shanxi Province ◽  
Geothermal System ◽  
Exploratory Research ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Transient Electromagnetic ◽  
Resistivity Model

Abstract Geothermal energy is an important renewable clean energy resource with high development and usage potential. Geothermal resources, on the other hand, are buried deep below, and mining hazards are significant. Geophysical investigation is frequently required to determine the depth and location of geothermal resources. The Transient Electromagnetic Method (TEM) and the Controlled Source Audio Frequency Magnetotellurics (CSAMT) have the highest detection efficiency and accuracy of all electromagnetic exploration methods. This article initially explains the algorithm theory of the finite difference technique before establishing a simplified geothermal system resistivity model. Established on the simplified resistivity model, a simulation analysis of the ability of CSAMT and TEM to distinguish target body faults at different resistivities and dip angles was performed, and the effectiveness and difference of the two methods in detecting typical geothermal resource targets was verified. A complete exploratory research of CSAMT and TEM was conducted in Huairen County, Shuozhou City, Shanxi Province, China, based on theoretical analysis. Both approaches can reflect the geoelectric structure of the survey region, demonstrating the efficacy of the two methods in detecting genuine geothermal resources.

scholarly journals Assessing the Geothermal Resource Potential of an Active Oil Field by Integrating a 3D Geological Model With the Hydro-Thermal Coupled Simulation

2022 ◽  
Vol 9 ◽  
Author(s):  
Yonghui Huang ◽  
Yuanzhi Cheng ◽  
Lu Ren ◽  
Fei Tian ◽  
Sheng Pan ◽  
...  
Keyword(s):  
Numerical Model ◽  
Oil Field ◽  
Natural State ◽  
Geological Model ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
New Town ◽  
3D Geological Model ◽  
Coupled Numerical Model ◽  
Geothermal Potential

Assessment of available geothermal resources in the deep oil field is important to the synergy exploitation of oil and geothermal resources. A revised volumetric approach is proposed in this work for evaluating deep geothermal potential in an active oil field by integrating a 3D geological model into a hydrothermal (HT)-coupled numerical model. Based on the analysis of the geological data and geothermal conditions, a 3D geological model is established with respect to the study area, which is discretized into grids or elements represented in the geological model. An HT-coupled numerical model was applied based on the static geological model to approximate the natural-state model of the geothermal reservoir, where the thermal distribution information can be extracted. Then the geothermal resource in each small grid element is calculated using a volumetric method, and the overall geothermal resource of the reservoirs can be obtained by making an integration over each element of the geological model. A further parametric study is carried out to investigate the influence of oil and gas saturations on the overall heat resources. The 3D geological model can provide detailed information on the reservoir volume, while the HT natural-state numerical model addressed the temperature distribution in the reservoir by taking into account complex geological structures and contrast heterogeneity. Therefore, integrating the 3D geological modeling and HT numerical model into the geothermal resource assessment improved its accuracy and helped to identify the distribution map of the available geothermal resources, which indicate optimal locations for further development and utilization of the geothermal resources. The Caofeidian new town Jidong oil field serves as an example to depict the calculation workflow. The simulation results demonstrate in the Caofeidian new town geothermal reservoir that the total amount of geothermal resources, using the proposed calculation method, is found to be 1.23e+18 J, and the total geothermal fluid volume is 8.97e+8 m3. Moreover, this approach clearly identifies the regions with the highest potential for geothermal resources. We believe this approach provides an alternative method for geothermal potential assessment in oil fields, which can be also applied globally.

Using GIS tools for the Play Fairway Analysis in geothermal exploration

2020 ◽  
Author(s):  
Francisco Airam Morales González ◽  
Luca D'Auria ◽  
Fátima Rodríguez ◽  
Eleazar Padrón ◽  
Nemesio Pérez
Keyword(s):  
Geographical Information Systems ◽  
Gravity Data ◽  
Probabilistic Method ◽  
Geographical Information ◽  
Geochemical Data ◽  
Geothermal Resource ◽  
Tectonic Structures ◽  
Geothermal Resources ◽  
Geothermal Exploration ◽  
High Enthalpy

<p>The Canary Islands archipelago, due to their recent volcanism, are the only Spanish territory with high enthalpy geothermal resources. However, there is no evidence in the islands of endogenous fluids manifestations with the exception of the Teide fumaroles, in Tenerife. Although some efforts have been made to investigate the geothermal resources from the 1970s to the 1990s and later during the past decade, the final goal has not yet been achieved, which is to locate and define the size, shape and structure of the geothermal resource, and determine their characteristics and capacity to produce energy (Rodríguez et al. 2015). For this reason it is extremely important to use new tools that allow a better understanding of the geothermal resource. In this work we describe a probabilistic evaluation of the geothermal potential of the island of Tenerife using Geographical Information Systems (GIS) through a collection of geological, geophysical and geochemical data.</p><p>The Play Fairway Analysis (PFA) was used, as illustrated by Lautze et al. (2017) in a similar study for an environment having similar characteristics: the Hawaiian Archipelago.  The PFA approach consists of joining information coming from multidisciplinary datasets within a probabilistic framework. Basically, the probabilities related to the presence of heat (H), fluids (F) and permeability (P) are computed quantitatively from the starting datasets and combined to obtain the probability of presence of geothermal resources and its confidence.</p><p>In the present study this probabilistic method have been implemented using GIS geoprocessing tools and raster image analysis using geological (Holocene vents, volcano-tectonic structures), geophysical (seismicity, resistivity data, gravity data) and geochemical (hydrogeochemistry, soil gas emission and geochemistry, etc…).</p><p>The main result of this work is a cartographic set that allow showing the areas of Tenerife with the greatest potential for geothermal exploration. Furthermore, using the statistical framework of PFA analysis, we obtained also confidence intervals on the retrieved probability maps.</p>

Petrological, Geochronological and Geochemical Constraints on Hot Dry Rock Geothermal Applications

2014 ◽  
Vol 986-987 ◽  
pp. 719-721
Author(s):  
An Dong Wang ◽  
Zhan Xue Sun ◽  
Bao Qun Hu ◽  
Jin Hui Liu ◽  
Jian Jun Wan
Keyword(s):  
Basement Rock ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Hot Dry Rock ◽  
The Past ◽  
Basement Rocks ◽  
Electricity Power ◽  
Geochemical Constraints

In the past forty years, the investigation on Hot Dry Rock (HDR) geothermal resource has been a hot topic. A great number of investigations confirm that electricity power generated from HDR is feasible and propose that a right HDR site is composed of basement rock and its overlying cover. In the present study, we explore the petrology, geochronology and geochemistry features of the HDR basement rocks with the aim to further optimize HDR siting conditions. Combined analyses show that young S-type or crustally-derived granites with high U, Th and K contents have great potential to develop HDR geothermal resources.

scholarly journals Geothermal resource potential assessment of Erdaobaihe, Changbaishan volcanic field: Constraints from geophysics

2021 ◽  
Vol 13 (1) ◽  
pp. 1053-1063
Author(s):  
Zhi-He Xu ◽  
Zhen-Jun Sun ◽  
Wei Xin ◽  
Liping Zhong
Keyword(s):  
Geophysical Methods ◽  
Close Correlation ◽  
Volcanic Field ◽  
Hot Water ◽  
Geothermal System ◽  
Published Data ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Growth Zones ◽  
Geothermal Drilling

Abstract Geothermal resources occurring in the Changbaishan volcanic field are directly or indirectly controlled by volcanic activity and exhibit a close correlation with deep-seated faults. Energy and thermal transfer are generally controlled by groundwater circulation and hot gas emission. This article considers the detectability of hot water and gas by geophysical methods. The controlled source acoustic magnetotelluric (CSAMT) and radon (222Rn) gas methods give straightforward information on electrical resistivity and natural radon emissions, respectively, to assess the geothermal condition. The CSAMT method detected five-banded low-apparent resistivity bodies (decreasing from 3,000 to 300 Ωm), indicating that there exists a high degree of water-bearing capacities in the subsurface. The radon (222Rn) gas concentrations were monitored in two rapid growth zones: one zone showing values ranging from 3,000 to 23,000 Bq/m3, and the other with values from 4,000 to 24,000 Bq/m3. These changes demonstrate that the heat energies available in these areas were very high and that there is potential for geothermal resources in those zones. Combining with previously published data from geothermometry and geothermal drilling, we argue that there is great potential in Erdaobaihe for geothermal exploitation and that the geothermal resource type should be classified into uplift mountain geothermal system no magma type.

scholarly journals Geothermal resources and reserves in Indonesia: an updated revision

2015 ◽  
Vol 3 (1) ◽  
pp. 1-6 ◽  
Author(s):  
A. Fauzi
Keyword(s):  
Power Production ◽  
Full Potential ◽  
Double Counting ◽  
Geothermal Resource ◽  
Geothermal Resources ◽  
Geothermal Potential ◽  
Recent Estimate ◽  
Base Reference ◽  
Reserve Estimates ◽  
Resource Category

<p><strong>Abstract.</strong> More than 300 high- to low-enthalpy geothermal sources have been identified throughout Indonesia. From the early 1980s until the late 1990s, the geothermal potential for power production in Indonesia was estimated to be about 20 000 MWe. The most recent estimate exceeds 29 000 MWe derived from the 300 sites (Geological Agency, December 2013). <br><br> This resource estimate has been obtained by adding all of the estimated geothermal potential resources and reserves classified as "speculative", "hypothetical", "possible", "probable", and "proven" from all sites where such information is available. However, this approach to estimating the geothermal potential is flawed because it includes double counting of some reserve estimates as resource estimates, thus giving an inflated figure for the total national geothermal potential. <br><br> This paper describes an updated revision of the geothermal resource estimate in Indonesia using a more realistic methodology. The methodology proposes that the preliminary "Speculative Resource" category should cover the full potential of a geothermal area and form the base reference figure for the resource of the area. Further investigation of this resource may improve the level of confidence of the category of reserves but will not necessarily increase the figure of the "preliminary resource estimate" as a whole, unless the result of the investigation is higher. A previous paper (Fauzi, 2013a, b) redefined and revised the geothermal resource estimate for Indonesia. The methodology, adopted from Fauzi (2013a, b), will be fully described in this paper. As a result of using the revised methodology, the potential geothermal resources and reserves for Indonesia are estimated to be about 24 000 MWe, some 5000 MWe less than the 2013 national estimate.</p>

scholarly journals A Resource and Policy Driven Assessment of the Geothermal Energy Potential Across the Islands of St. Vincent and the Grenadines

2021 ◽  
Vol 9 ◽  
Author(s):  
Randy Koon Koon ◽  
Kalim Shah ◽  
Masaō Ashtine ◽  
Santana Lewis
Keyword(s):  
Geothermal Energy ◽  
Resource Assessment ◽  
Geothermal Resource ◽  
Energy Potential ◽  
Geothermal Resources ◽  
Caribbean Community ◽  
Regulatory Processes ◽  
Energy Demands ◽  
Geothermal Power ◽  
Base Load

The energy security of each Caribbean Community (CARICOM) member state is a key issue specifically addressed based on the energy demands of each nation. St. Vincent and the Grenadines (SVG) has the potential to strengthen its energy sector through the exploitation of immense untapped natural geothermal resources. Currently, SVG is planning to integrate base load power through a 10 Megawatt-electric (MWe) geothermal power plant (GPP1). The paper aims to highlight a detailed resource assessment profile of the renewables across SVG and the projected benefits of the proposed 10 MWe geothermal power potential, such as the positive economic development (displacing 149,000 bbls of crude oil), and the transition to a more climate-sensitive nation (displacing an estimated 0.172 million tCO2e/year). In addition, a volumetric method (Monte Carlo simulations) has been applied to reveal that the geothermal reservoir can sustain a minimum of 31 MWe, 34 MWe and 92 MWe over the lifespan of 25–30 years, for well 1 (SVG01), well 2 (SVG02) and well 3 (SVG03) respectively. Given the findings of the assessment and simulations, several policy approaches are identified as potential means of enhancing geothermal resource development and leveraging the resource for the islands’ sustainable energy demands. These include incentivization for public-private partnerships, information certainty, regulatory processes, and strengthened institutions.

scholarly journals The Analysis of Heat Storage Capacity and the Formation Characteristics of Geothermal Resources in Sedimentary Basins —— A Case Study on Dunhuang Basin

2015 ◽  
Vol 8 (1) ◽  
pp. 73-76
Author(s):  
Yujiang He ◽  
Guiling Wang ◽  
Wenjing Lin ◽  
Wei Zhang
Keyword(s):  
Storage Capacity ◽  
Heat Storage ◽  
Sedimentary Basin ◽  
Sedimentary Basins ◽  
Geological Structure ◽  
Geothermal Reservoir ◽  
Geothermal Resource ◽  
Reservoir Model ◽  
Geothermal Resources

The geothermal resources in sedimentary basin are affected by many factors because the characteristic of geothermal reservoirs is very complex, so the heat storage capacities are hard to calculate. This paper took Dunhuang Basin as an example to analyze the geological structure, stratigraphic structure and the formation mechanism of geothermal water based on the formation characteristics of the geothermal resources. The analysis results showed the geothermal reservoir parameters, including the area, thickness, and temperature of the geothermal reservoir, and porosity, etc. Based on geothermal reservoir model, the conclusion was that the geothermal resource of Dunhuang Basin was 7.75E+16kJ. The results provided an advice for the exploitation of geothermal resources in sedimentary basins.

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