AndreaBozzo/ceres-open-data-index huggingface dataset:
Geomechanical Modeling for Thermal Spallation Drilling

Wells for Engineered Geothermal Systems (EGS) typically occur in conditions presenting significant challenges for conventional rotary and percussive drilling technologies: granitic rocks that reduce drilling speeds and cause substantial equipment wear. Thermal spallation drilling, in which rock is fragmented by high temperature rather than mechanical means, offers a potential solution to these problems. However, much of the knowledge surrounding this drilling technique is empirical - based on laboratory experiments that may or may not represent field conditions. This paper outlines a new numerical modeling effort investigating the grain-scale processes governing thermal spallation drilling. Several factors affect spall production at the mesoscale, including grain size and size distribution, surface temperatures and material heterogeneity. To investigate the relative influence of these factors, we have conducted a series of simulations using GEODYN - a parallel Eulerian solid and fluid dynamics code. In this paper, we describe a two-dimensional model used to simulate the grain-scale processes and present preliminary results from this modeling effort.

Tags: egs, engineered-geothermal-systems, geodyn, geomechanical-modeling, geothermal, numerical-modeling, thermal-spallation-drilling
Organization: Department of Energy
Grain-Scale Failure in Thermal Spallation Drilling

Geothermal power promises clean, renewable, reliable and potentially widely-available energy, but is limited by high initial capital costs. New drilling technologies are required to make geothermal power financially competitive with other energy sources. One potential solution is offered by Thermal Spallation Drilling (TSD) - a novel drilling technique in which small particles (spalls) are released from the rock surface by rapid heating. In this paper, we discuss results from a new modeling effort investigating thermal spallation drilling. In particular, we describe an explicit model that simulates the grain-scale mechanics of thermal spallation and use this model to examine existing theories concerning spalling mechanisms. We will report how borehole conditions influence spall production, and discuss implications for macro-scale models of drilling systems.

Tags: geothermal, grain-scale-mechanics, modeling, thermal-spallation-drilling, thermomechanical-processes
Organization: Department of Energy
Simulation Tools for Modeling Thermal Spallation Drilling on Multiple Scales

Widespread adoption of geothermal energy will require access to deeply buried resources in granitic basement rocks at high temperatures and pressures. Exploiting these resources necessitates novel methods for drilling, stimulation, and maintenance, under operating conditions that are often difficult or impossible to reproduce in laboratory settings. Physically rigorous numerical modeling tools are vital to highlight potential risks, guide process optimization and reduce the uncertainties involved in developing new technologies for these environments. Lawrence Livermore National Laboratory has developed, and is constantly improving, several multi-physics solid/structural mechanics, fluid dynamics, chemistry, and discrete element codes. Integration of the LLNL simulation tools into a coherent simulation environment will provide a predictive capability for the thermomechanical response - in particular the spall and fracture - of basement rocks at high temperatures and pressures useful for drilling and other geothermal applications. This paper outlines a modeling effort investigating the processes involved in hydrothermal spallation drilling. These include interconnected phenomena on several length and time scales: from system-scale fluid dynamics and heat transfer of the high temperature jet to the rock face to the grain-scale thermomechanics of spallation. Three models are described to capture these different scale processes: a grain-scale model to investigate the onset of spallation; a particulate fluids model to simulate the transport of the produced spalls; and a borehole-scale model to represent the integrated system behavior.

Tags: egs, engineered-geothermal-systems, fluid-dynamics, geothermal, grain-scale-thermomechanics, granitic-basement-rocks, heat-transfer, numerical-modeling, thermal-spallation-drilling, unified-tool
Organization: Department of Energy
Chemical Impact of Elevated CO2 on Geothermal Energy Production

Numerical simulations have shown that the use of supercritical CO2 instead of water as a heat transfer fluid yields significantly greater heat extraction rates for geothermal energy. If this technology is implemented successfully, it could increase geothermal energy production and offset atmospheric emissions of greenhouse gases. However, the impact of geochemical reactions between acidic waters in equilibrium with supercritical CO2 and the reservoir rock have not been evaluated. At issue are enhanced rock-water interactions that may reduce reservoir porosity and permeability and may exacerbate downstream scaling. 

The publications included in this submission aim to assess the geochemical impact of CO2 on geothermal energy production by analyzing the geochemistry of existing geothermal fields with elevated natural CO2, to measure realistic rock-water rates for geothermal systems using laboratory and field-based experiments, and to develop reactive transport models using the filed-based rates to simulate production scale impacts.

Tags: chlorite-dissolution-kinetics, co2, co2-egs, dacite, dissolution, egs, egs-co2, fracture-permeability, geochemical-alteration, geochemical-reaction, geochemistry, geothermal, greywacke, mineral-alteration, mineral-scaling, modeling, new-zealand, precipitation, rhyolite, rock-gas-interaction, sequestration, simulation, taupo-volcanic-zone
Organization: Department of Energy
Energy Return On Investment of Engineered Geothermal Systems Data

The project provides an updated Energy Return on Investment (EROI) for Enhanced Geothermal Systems (EGS).  Results incorporate Argonne National Laboratory's Life Cycle Assessment and base case assumptions consistent with other projects in the Analysis subprogram.
EROI is a ratio of the energy delivered to the consumer to the energy consumed to build, operate, and decommission the facility.  EROI is important in assessing the viability of energy alternatives.  Currently EROI analyses of geothermal energy are either out-of-date, of uncertain methodology, or presented online with little supporting documentation.

This data set is a collection of files documenting data used to calculate the Energy Return On Investment (EROI) of Engineered Geothermal Systems (EGS) and erratum to publications prior to the final report.  Final report is available below, or from the OSTI web site (http://www.osti.gov/geothermal/).  Data in this collections includes the well designs used, input parameters for GETEM, a discussion of the energy needed to haul materials to the drill site, the baseline mud program, and a summary of the energy needed to drill each of the well designs.

EROI is the ratio of the energy delivered to the customer to the energy consumed to construct, operate, and decommission the facility.  Whereas efficiency is the ratio of the energy delivered to the customer to the energy extracted from the reservoir.  

Tags: assessment, bentonite, casing, cement, depth, diameter, economic, economics, efficiency, egs, energy, energy-return-on-investment, engineered, engineered-geothermal-system, enhanced-geothermal-system, eroi, fuel, geothermal, getem, inputs, investment, materials, net, payback, polymers, return, trucking, wells
Organization: Department of Energy
Beowawe Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in Beowawe geothermal area, Nevada.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: beowawe, fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, great-basin, mass-spectrometry, nevada
Organization: Department of Energy
El Centro Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in El Centro geothermal area, California.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: california, el-centro, fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, imperial-valley, mass-spectrometry
Organization: Department of Energy
Fallon Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in Fallon geothermal area, Nevada.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: fallon, fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, mass-spectrometry, nevada, sierra-nevada
Organization: Department of Energy
Iceland Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in Iceland.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, iceland, karaha-telga-bodegas, mass-spectrometry, oceanic-ridge, volcanic
Organization: Department of Energy
Hawthorne Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in the Hawthorne Army Ammunition Depot geothermal area, Nevada.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, great-basin, hawthorne, mass-spectrometry, nevada
Organization: Department of Energy
Glass Mountain Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in Glass Mountain geothermal area, California.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: beowawe, california, fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, glass-mountain, long-valley-caldera, mass-spectrometry
Organization: Department of Energy
Karaha Fluid Inclusion Gas Analysis

Fluid inclusion gas analysis for wells in Karaha Telga Bodegas geothermal reservoir, Indonesia.  Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields.  Each sample has mass spectrum counts for 180 chemical species.

Tags: andesitic, fluid-inclusion, fluid-inclusion-stratigraphy, gas-analysis, geothermal, indonesia, karaha-telga-bodegas, mass-spectrometry, volcanic
Organization: Department of Energy
GEOTHERM Data Set

GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas:

1. data acquisition and entry, involving data entry via word processors and magnetic tape;
2. quality assurance, including the criteria and standards handbook and front-end data-screening programs; 
3. operation, involving database backups and information extraction; and 
4. user assistance, preparation of such items as application programs, and a quarterly newsletter. 

The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

Tags: computers-and-geosciences, database, databases, doi10-1016-0098-30048390034-1, geochemistry, geotherm, geothermal-fluids, geothermal-systems, geothermal-wells, hydrology, journal-article, report, scanned, software, usgs, well-characteristics
Organization: Department of Energy
Geothermal Exploration Cost and Time Metric

The National Renewable Energy Laboratory (NREL) was tasked with developing a metric in 2012 to measure the impacts of RD&D funding on the cost and time required for geothermal exploration activities. The development of this cost and time metric included collecting cost and time data for exploration techniques, creating a baseline suite of exploration techniques to which future exploration cost and time improvements can be compared, and developing an online tool for graphically showing potential project impacts (all available at http://en.openei.org/wiki/Gateway: Geothermal). 

This paper describes the methodology used to define the baseline exploration suite of techniques (baseline), as well as the approach that was used to create the cost and time data set that populates the baseline. The resulting product, an online tool for measuring impact, and the aggregated cost and time data are available on the Open Energy Information website (OpenEI, http://en.openei.org) for public access.

Tags: cost, exploration, exploraton, geothermal, metric, risk, time, tool
Organization: Department of Energy
April 2013 Green Machine Florida Canyon Hourly Data

Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range.

The Green Machine is an Organic Rankine Cycle power plant.  The Florida Canyon machine is powered by geothermal brine with air cooled condensing.  The data provided is an hourly summary from 4/16/13.


Tags: coproduced, data, electratherm, florida-canyon, geothermal, green-machine, hourly, hourly-data, low-temperature, micro-geothermal, micro-geothermal-power-plant, operation, orc, orc-data, organic-rankine-cycle, power, production, small-scale
Organization: Department of Energy
Argonne Geothermal Geochemical Database v2.0

A database of geochemical data from potential geothermal sources aggregated from multiple sources as of March 2010.  The database contains fields for the location, depth, temperature, pH, total dissolved solids concentration, chemical composition, and date of sampling.  A separate tab contains data on non-condensible gas compositions.  The database contains records for over 50,000 wells, although many entries are incomplete.   Current versions of source documentation are listed in the dataset.

Tags: composition, geochemical, geochemistry, geothermal, lithium, ncg, noncondensible-gas, ph, tds, wells
Organization: Department of Energy
Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data.  The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data.  This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km.  It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping.  The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region. 

Tags: conceptual-report, dixie-valley, egs, favorability-trust-mapping, geothermal, hydrothermal-system, methodology, nevada
Organization: Department of Energy
Life Cycle Analysis Data and Results for Geothermal and Other Electricity Generation Technologies

Life cycle analysis (LCA) is an environmental assessment method that quantifies the environmental performance of a product system over its entire lifetime, from cradle to grave. Based on a set of relevant metrics, the method is aptly suited for comparing the environmental performance of competing products systems. This file contains LCA data and results for electric power production including geothermal power. The LCA for electric power has been broken down into two life cycle stages, namely plant and fuel cycles.  

Relevant metrics include the energy ratio and greenhouse gas (GHG) ratios, where the former is the ratio of system input energy to total lifetime electrical energy out and the latter is the ratio of the sum of all incurred greenhouse gases (in CO2 equivalents) divided by the same energy output. 

Specific information included herein are material to power (MPR) ratios for a range of power technologies for conventional thermoelectric, renewables (including three geothermal power technologies), and coproduced natural gas/geothermal power. For the geothermal power scenarios, the MPRs include the casing, cement, diesel, and water requirements for drilling wells and topside piping.

Also included herein are energy and GHG ratios for plant and fuel cycle stages for the range of considered electricity generating technologies. 

Some of this information are MPR data extracted directly from the literature or from models (eg. ICARUS - a subset of ASPEN models) and others (energy and GHG ratios) are results calculated using GREET models and MPR data. MPR data for wells included herein were based on the Argonne well materials model and GETEM well count results.


Tags: analysis, assessment, coproduced, electricity-generating-technologies, energy-ratios, environmental, geothermal, ghg, greenhouse-gas-emission, greenhouse-gas-emissions, lca, life-cycle, life-cycle-analysis, material-requirements, mpr, plant-materials, ratio
Organization: Department of Energy
May 2013 Green Machine Florida Canyon Hourly Data

Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from May 2013

Tags: coproduced, data, electratherm, florida-canyon, geothermal, green-machine, hourly-data, low-temperature, micro-geothermal, micro-geothermal-power-plant, operation, orc, organic-rankine-cycle, power, production, small-scale
Organization: Department of Energy
Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data.  The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data.  This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km.  It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping.  The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region. 

Tags: compression, dilatation, dixie-valley, egs, faults, favorability-trust-mapping, geospatial-data, geothermal, gis, gravity, hydrothermal-system, magnetotellurics, seismic, temperature, wells
Organization: Department of Energy
Geothermal Exploration Cost and Time

This paper describes the methodology used to define the baseline exploration suite of techniques (baseline), as well as the approach that was used to create the cost and time data set that populates the baseline. The resulting product, an online tool for measuring impact, and the aggregated cost and time data are available on the Open Energy Information website (OpenEI, http://en.openei.org) for public access.  The Department of Energy's Geothermal Technology Office (GTO) provides RD&D funding for geothermal exploration technologies with the goal of lowering the risks and costs of geothermal development and exploration. The National Renewable Energy Laboratory (NREL) developed this cost and time metric included collecting cost and time data for exploration techniques, creating a baseline suite of exploration techniques to which future exploration cost and time improvements can be compared, and developing an online tool for graphically showing potential project impacts (all available at http://en.openei.org/wiki/Gateway: Geothermal). 

Tags: cost, drilling, economic, exploration, geochemistry, geophysics, geothermal, remote-sensing, time
Organization: Department of Energy