Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University

Garapati, Nagasree; Zhang, Yingqi; Doughty, Christine; Jeanne, Pierre

doi:10.15121/1597110

Title: Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University

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Abstract

To reduce the geothermal exploration risk, a feasibility study is performed for a deep direct-use system proposed at the West Virginia University (WVU) Morgantown campus. This study applies numerical simulations to investigate reservoir impedance and thermal production. Because of the great depth of the geothermal reservoir, few data are available to characterize reservoir features and properties. As a result, the study focuses on the following three aspects: 1. model choice for predicting reservoir impedance and thermal breakthrough: after investigating three potential models (one single permeability model and two dual permeability models) for flow through fractured rock, it is decided to use single permeability model for further analysis; 2. well placement (horizontal vs. vertical) options: horizontal well placement seems to be more robust to heterogeneity and the impedance is more acceptable; 3. Prediction uncertainty: the most influential parameters are identified using a First-Order-Second-Moment uncertainty propagation analysis, and the uncertain range of the model predictions is estimated by performing a Monte Carlo simulation. Heterogeneity has a large impact on the perdition, therefore, is considered in the predictive model and uncertainty analysis. The numerical model results and uncertainty analysis are used for economic analysis. The dataset submitted here support the described study. Manuscriptmore »« less

Authors:

Garapati, Nagasree; Zhang, Yingqi; Doughty, Christine; Jeanne, Pierre

West Virginia University

Publication Date:: Fri Dec 20 04:00:00 UTC 2019

Other Number(s):: 1197

DOE Contract Number:: EE0008105

Research Org.:: DOE Geothermal Data Repository; West Virginia University

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)

Collaborations:: West Virginia University

Subject:: 15 GEOTHERMAL ENERGY; First-Order-Second-Moment uncertainty propagation analysis; LBNL; Monte Carlo; Numerical Modeling; Reservoir flow model; Tuscarora; WVU; analysis; ddu; deep direct-use; direct use; economic; economic analysis; exploration risk; feasibility; flow; flow model; fracture; geothermal; geothermal exploration risk; geothermics; iTOUGH2; matrix; modeling; morgantown; paper; permeability; permeability models; reservoir impedance; resource potential; simulation; thermal breakthrough; thermal production; tuscarora sandstone; uncertainty; uncertainty analysis; west virginia university

OSTI Identifier:: 1597110

DOI:: https://doi.org/10.15121/1597110

Citation Formats


                    Garapati, Nagasree, Zhang, Yingqi, Doughty, Christine, and Jeanne, Pierre. Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University.  United States: N. p., 2019. 
        Web.  doi:10.15121/1597110.

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                    Garapati, Nagasree, Zhang, Yingqi, Doughty, Christine, & Jeanne, Pierre. Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University.  United States.  doi:https://doi.org/10.15121/1597110

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                    Garapati, Nagasree, Zhang, Yingqi, Doughty, Christine, and Jeanne, Pierre. 2019.  
"Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University".  United States.  doi:https://doi.org/10.15121/1597110.  https://www.osti.gov/servlets/purl/1597110. Pub date:Fri Dec 20 04:00:00 UTC 2019

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@article{osti_1597110,

  title        = {Deep Direct-Use Feasibility Study Numerical Modeling and Uncertainty Analysis using iTOUGH2 for West Virginia University},

  author       = {Garapati, Nagasree and Zhang, Yingqi and Doughty, Christine and Jeanne, Pierre},

  abstractNote = {To reduce the geothermal exploration risk, a feasibility study is performed for a deep direct-use system proposed at the West Virginia University (WVU) Morgantown campus. This study applies numerical simulations to investigate reservoir impedance and thermal production. Because of the great depth of the geothermal reservoir, few data are available to characterize reservoir features and properties. As a result, the study focuses on the following three aspects: 1. model choice for predicting reservoir impedance and thermal breakthrough: after investigating three potential models (one single permeability model and two dual permeability models) for flow through fractured rock, it is decided to use single permeability model for further analysis; 2. well placement (horizontal vs. vertical) options: horizontal well placement seems to be more robust to heterogeneity and the impedance is more acceptable; 3. Prediction uncertainty: the most influential parameters are identified using a First-Order-Second-Moment uncertainty propagation analysis, and the uncertain range of the model predictions is estimated by performing a Monte Carlo simulation. Heterogeneity has a large impact on the perdition, therefore, is considered in the predictive model and uncertainty analysis. The numerical model results and uncertainty analysis are used for economic analysis. The dataset submitted here support the described study. Manuscript is submitted to Geothermics, will be linked once paper is accepted.},

  doi          = {10.15121/1597110},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Dec 20 04:00:00 UTC 2019},

  month        = {Fri Dec 20 04:00:00 UTC 2019}

}

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DOI: https://doi.org/10.15121/1597110

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