1 / 45

Geophysical Study of the Pagosa Springs Geothermal System

Geophysical Study of the Pagosa Springs Geothermal System. Presenters: Thomas Blitz Thu Bui Elizabeth Pettinger Aly Lozier. Outline. Introduction and Geothermal Geological Context Geophysical Methods Survey Interpretation

jola
Download Presentation

Geophysical Study of the Pagosa Springs Geothermal System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Geophysical Study of the Pagosa Springs Geothermal System Presenters: Thomas Blitz Thu Bui Elizabeth Pettinger Aly Lozier School of Mines Geophysics Field Camp

  2. Outline Introduction and Geothermal Geological Context Geophysical Methods Survey Interpretation Conclusions and Future Surveys School of Mines Geophysics Field Camp

  3. Survey Goal Map the Geothermal System of Pagosa Springs School of Mines Geophysics Field Camp

  4. Geothermal in Pagosa Geothermal Greenhouses Domestic Water 135◦ F output Distribution Loop Pagosa Geothermal Plant Geothermal Water (140◦ F) 400’ well 130◦ F input Water to Resort School of Mines Geophysics Field Camp

  5. II. Geological Context School of Mines Geophysics Field Camp

  6. Geologic Overview (105 mi) Google Earth School of Mines Geophysics Field Camp

  7. Primary Fault Network Dike Stinking Springs anticline From Galloway 1980 School of Mines Geophysics Field Camp

  8. Lithology Mancos shale SEAL 70 m Limestone layer Local shallow RESERVOIR Dakota sandstone 60 m 210 m Partial SEAL Morrison 30 m Wanakah 50 m Entrada Basement Thickness (m) Log from Galloway, 1980 School of Mines Geophysics Field Camp

  9. Geologic History 3 km (1.1 mi) Pagosa Springs San Juan river From 2012 Field Camp report Volcanics River sandstones Mesa Verde Mancos/Lewis Dakota sandstone Morrison formation School of Mines Geophysics Field Camp

  10. Local Geology SW NE 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 7000 0 3000 5000 1000 2000 4000 6000 Vertical Exaggeration = 4 School of Mines Geophysics Field Camp

  11. III. Geophysical Methods Surveying Electromagnetics DC Resistivity Self Potential Seismic School of Mines Geophysics Field Camp

  12. Goal ofGeophysics Remotely sense subsurface structures School of Mines Geophysics Field Camp

  13. Geophysics and Geothermal School of Mines Geophysics Field Camp

  14. Surveying Handheld GPS Differential GPS TDM School of Mines Geophysics Field Camp

  15. Electromagnetics EM47 EM31 Measures: voltage differences Goal: identify possible faults and fluid content School of Mines Geophysics Field Camp

  16. DC Resistivity SuperSting ABEM • Measures: voltage differences • Goal: identify possible faults and fluid content School of Mines Geophysics Field Camp

  17. Self Potential Measures: Earth’s natural electrical potential Goal: characterize fluid flow School of Mines Geophysics Field Camp

  18. The Seismic Technique 11/1/2013 School of Mines Geophysics Field Camp 18

  19. Seismic Acquisition ‘Vibroseis’ trucks and hammers send acoustic ‘chirps’ into the Earth 11/1/2013 School of Mines Geophysics Field Camp

  20. IV. Survey Interpretation School of Mines Geophysics Field Camp

  21. Main Survey Line - Map 2012 Survey 1 mile School of Mines Geophysics Field Camp

  22. Main Survey Line - Geology SW NE 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 7000 0 3000 5000 1000 2000 4000 6000 Vertical Exaggeration = 4 School of Mines Geophysics Field Camp

  23. Main Survey Line – Interpretation by Method SW NE Depth (m) • Deep Seismic Acquisition • Able to resolve large scale features e.g. faults School of Mines Geophysics Field Camp

  24. Main Survey Line – Interpretation by Method SW NE Potential (mV) Warren 1986 Fault 2012 Fault 0 Distance (m) 6380 Anticlinal structure 0 Distance (m) 6380 Eight Mile Mesa Fault Vertical Exaggeration of model = 1.5 Trujillo Road San Juan River DC Resistivity & SP School of Mines Geophysics Field Camp

  25. Main Survey Line – Combined Interpretation DC Resistivity vs Deep Seismic Depth Section SW NE Depth (m) Warren 1986 Fault 8 Mile Mesa Fault San Juan River Mill Creek 2012 Fault Recycling Center Hairpin Dike Depth (m) Top Dakota Potential Sill Top Morrison Top Basement 8 Mile Mesa Fault 2013 Fault Modified Warren Fault 2012 Fault School of Mines Geophysics Field Camp

  26. Main Survey Line – Combined Interpretation Geology vs DC Resistivity SW NE Depth (m) NE SW 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 Trujillo road San Juan River 8 Mile Mesa Fault Warren 1986 Fault 2012 Fault School of Mines Geophysics Field Camp

  27. Mill Creek School of Mines Geophysics Field Camp

  28. Mill Creek – Why? Elevation (m) Distance (m) Potential faults Flat, open spaces Rural area – low noise School of Mines Geophysics Field Camp

  29. School of Mines Geophysics Field Camp

  30. Mill Creek – EM Dakota Dakota Dakota Dakota Morrison Morrison Morrison Morrison 60 m 80 m S N S N School of Mines Geophysics Field Camp N 100 m S 100 m S N

  31. Mill Creek – South Line 0 200 400 600 800 1000 1200 Dakota sandstone groundwater fault West East School of Mines Geophysics Field Camp

  32. Mill Creek – West Line X X 0 200 400 600 800 1000 1200 faults South North School of Mines Geophysics Field Camp

  33. Mill Creek – East Line 0 200 400 600 800 1000 1200 faults Dakota formation South North School of Mines Geophysics Field Camp

  34. Mill Creek – SP Map School of Mines Geophysics Field Camp

  35. V. Conclusions School of Mines Geophysics Field Camp

  36. All Surveys School of Mines Geophysics Field Camp

  37. Combining Methods-Seismic 2400 2000 Elevation (m) San Juan River Recycling Center 1600 Top Dakota Potential Sill Top Morrison 2400 - Top Basement Modified Warren Fault Mesa Fault 2013 Fault 2 2012 Fault Eight Mile Fault 1600 - School of Mines Geophysics Field Camp

  38. Combining the Methods - DC 2400 2000 Elevation (m) 1600 Eight Mile Fault Warren Fault 2012 Field Camp Fault 0 - Elevation (m) 250 - School of Mines Geophysics Field Camp

  39. Combining the Locations School of Mines Geophysics Field Camp

  40. Interpreted Geothermal System School of Mines Geophysics Field Camp

  41. Future Work School of Mines Geophysics Field Camp

  42. Students, Staff, and Faculty School of Mines Geophysics Field Camp

  43. Acknowledgements Primary support: Archuleta County – Mike Whiting & Greg Schulte Archuleta School District 50 Joint – Linda Reed Pagosa Springs Geothermal District – Chris Gallegos & Gene Tautges Financial support: Colorado School of Mines Imperial College London SEG Foundation Equipment & services: CGG Sercel Geonics – Rob Harris & Simon Boniwell USGS – Andy Kass & Jeff Lucius Zapata – Jim Hild Help & support: CSU Archuleta Extension – Terry Schaaf Pagosa High School – Laura Rand & kitchen staff Pagosa Baking Company – Kathy Keyes & Kirsten Skeehan San Juan Motel – Kiel Steck First Inn – Lou Woodard Horizon Bus Line Century Link Dan Hand Roy Mink NREL – Michael Hillesheim Property owners: Marvin Lord Richard Clare Rajat Gupta Mike Ferguson Aspen Cascade Ranch – J.R Ford School of Mines Geophysics Field Camp

  44. Acknowledgements Geothermal Greenhouse Partnership Ken Levine Kevin Khung – US Forest Service KWUF Pagosa Springs Chamber of Commerce – Mary Jo Coulehan Terence Young Prof Andre Revil Prof Andrei Swidinsky Prof Bob Raynolds Prof Dave Hale Prof Paul Sava PagosaSprings Community Development Corp – Rich Lindblad Pagosa Sun – Jim McQuiggin Reservoir River Ranch – Levine Family Road and Bridge Department Jerry Smith & Sally High Spring Creek Ranch – Donald Shahan The Springs Resort – Carla Shaw Town of PagosaSprings Keely Whittington US Geological Survey – Seth Haines Bruce Quintanna – Archuleta County Paul Morgan – Colorado Geological Survey Pagosa.com Prof Michael Batzle Prof ProfYaoguo Li Prof Jeff Andrews-Hanna Prof Ken Larner DrMariosKaraoulis Dawn Umpleby Brian Passerella Marvin Johnson Prof Helmut Jakubowicz Prof Adam Booth Joyce Hoopes Matthew Wisniewski Joseph Capriotti Gordon Osterman Elizabeth Maag Thomas Rapstine Stephen Cuttler Eleanor Oakley Jorge E de La Torre Guzman School of Mines Geophysics Field Camp

  45. Questions? School of Mines Geophysics Field Camp

More Related