Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

Description

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The overall project area is 2500km2 with the Calibration Area (Dixie Valley Geothermal Wellfield) being about 170km2. The Final Scientific Report (FSR) is submitted in two parts (I and II). FSR part I 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. FSR Part II presents (1) 278 new gravity stations; (2) enhanced gravity-magnetic modeling; (3) 42 new ambient seismic noise survey stations; (4) an integration of the new seismic noise data with a regional seismic network; (5) a new methodology and approach to interpret this data; (5) a novel method to predict rock type and temperature based on the newly interpreted data; (6) 70 new magnetotelluric (MT) stations; (7) an integrated interpretation of the enhanced MT data set; (8) the results of a 308 station soil CO2 gas survey; (9) new conductive thermal modeling in the project area; (10) new convective modeling in the Calibration Area; (11) pseudo-convective modeling in the Calibration Area; (12) enhanced data implications and qualitative geoscience correlations at three scales (a) Regional, (b) Project, and (c) Calibration Area; (13) quantitative geostatistical exploratory data analysis; and (14) responses to nine questions posed in the proposal for this investigation. Enhanced favorability/trust maps were not generated because there was not a sufficient amount of new, fully-vetted (see below) rock type, temperature, and stress data. The enhanced seismic data did generate a new method to infer rock type and temperature (However, in the opinion of the Principal Investigator for this project, this new methodology needs to be tested and evaluated at other sites in the Basin and Range before it is used to generate the referenced maps. As in the baseline conceptual model, the enhanced findings can be applied to both the hydrothermal system and EGS in the Dixie Valley region).

Resources

Name Format Description Link
53 Location of gravity stations and complete Bouguer anomaly calculatd at 2.67 gm/cc https://gdr.openei.org/files/273/gravity-dvnew-final.xlsx
10 Description of magnetotelluric data acquisition and processing methods https://gdr.openei.org/files/273/MT-README-WBdix.doc
47 Magnetotelluric station locations https://gdr.openei.org/files/273/MT-stations-AD-utm94.txt
47 Magnetotelluric data aquired and used for inversion https://gdr.openei.org/files/273/MT-data-aldx9440.txt
47 Magnetotelluric Inversion Data https://gdr.openei.org/files/273/MT-data-DV_121114_mod54.txt
57 Raw Data from the Megnetotelluric Survey. Also includes EDI files, GPS data, a Logistics Report, Pictures, and additional supporting files. https://gdr.openei.org/files/273/July2011%20Survey%20Data_Quantec.zip
57 Figures, data files, and source code for seismic velocity model https://gdr.openei.org/files/273/Appendix_10%20Seismic%20Data%20and%20Models.zip
53 Geostatistical analysis of Calibration Area https://gdr.openei.org/files/273/Calibration%20Area_enhanced%20data_geostatistics_FINAL.xlsx
47 Because the originally submitted fileset was too large, some files were removed and may be available by request to the submitter. This file includes a list of the removed filed. https://gdr.openei.org/files/273/filelist.txt
33 Baseline Conceptual Model of the EGS Exploration Methodology Project (using the Dixie Valley Geothermal System, Nevada as a Calibration Site). https://gdr.openei.org/files/273/Part%20I_Final%20Scientific%20Report_final%20complete.pdf
33 Enhanced Conceptual Model of the EGS Exploration Methodology Project (using the Dixie Valley Geothermal System, Nevada as a Calibration Site). https://gdr.openei.org/files/273/Part%20II_Final%20Scientific%20Report_final%20complete.pdf

Tags

  • complete-bouguer-anomaly
  • metadata
  • bob-karlin
  • data
  • hydrothermal-system
  • egs-exploration-methodology
  • geophysics
  • ileana-tibulec
  • inversion
  • egs
  • magnetotellurics
  • station-location
  • gravity
  • dixie-valley
  • favorability-trust-mapping
  • geostatistics
  • final-scientific-report
  • quantec
  • phil-wannamaker
  • fletcher-h-ibser
  • geothermal
  • seismic-velocity-model

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