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Conclusions Abundant evidence from petroleum exploration shows that stratigraphic permeability capable of supporting high flow-rate geothermal wells can be found in many sedimentary basins. Al- though global geothermal experience with EGS projects and other deep drilling in volcanic or igneous host rocks suggest hydrother- mal alteration may limit good permeability at high temperature and at depths of more than 3 km, lithologies such as clean carbonates and sandstones can sustain high permeability to at least 5 km depth. Examples from deep wells in two Rocky Mountain basins also show that carbonate reservoirs, possibly dolomitic, can preserve high permeability when the temperatures are 220 - 240°C and at more than 5 km depth. The inverse relationship between carbonate solubility and increasing temperature suggests carbonates may be a preferred reservoir target. The eastern Great Basin is underlain by a lower Paleozoic carbonate section that ranges up to 3 km in thickness and is known to have good permeability (Heilweil and Brooks, 2011). Large areas of the Great Basin have heat flows of more than 80 mW/m2, providing numerous reservoir targets where temperatures will be 175 - 200°C at depths of 3 – 4 km, and good stratigraphic permeability is known or inferred. The large areas of these reservoirs (~ 102 to 103 km2) can each support power plants of more 100 MWe. Acknowledgements This paper is part of a project titled: “Novel Geothermal De- velopment of Sedimentary Basins in the United States,” Moore, J.N. and Allis, R.G. (Co-Principal Investigators), which is partially funded by the Geothermal Technologies Program of the U.S. Dept. of Energy (Award DE-EE0005128). Mark Gwynn, Stefan Kirby, Doug Sprinkel, Bob Blackett, and Christian Hardwick (UGS) helped compile some of the original material cited here. Jay Hill (UGS) drafted some of the figures. Thanks to UGS and GRC reviewers for helpful comments. References Allis, R.G., 2014. Formation pressure as a potential indicator of high stratigraphic permeability. Proc. 39th Workshop on Geothermal Reservoir Engineering, Stanford University, California, 102-112. Allis, R., Blackett, R., Gwynn, M., Hardwick, C., Moore, J.N., Morgan, C., Schelling, D., and Sprinkel, D., 2012. Stratigraphic reservoirs in the Great Basin – the bridge to Enhanced Geothermal Systems in the U.S. Transactions, Geothermal Resources Council, 36, 351-357. Allis, R., Moore, J.N., Anderson, T., Deo, M., Kirby, S., Roehner, R., and Spencer, T., 2013. Characterizing the power potential of hot stratigraphic reservoirs in the Western U.S., Proc., 38th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, 1463-1473. Anderson, T.C., 2013. Geothermal potential of deep sedimentary basins in the U.S. Transactions, Geothermal Resources Council, 37, 223-229. Bendall, B., Hogarth, R., Holl, H., McMahon, A., Larking, A., and Reid, R., 2014. Australian Experiences in EGS Permeability Enhancement – A review of three case studies. Proc. 39th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, 495-505. Blackwell, D.D., Waibel, A.F., and Richards, M., 2012. Why Basin and Range systems are hard to find: The moral of the story is they get smaller with depth! Transactions, Geothermal Resources Council, 36, 1321-1326. Chovanec, Y.M., 2003. Geothermal analysis of Schellbourne, east-central Nevada. MS thesis, University of Texas at Arlington, pp. 124. Crowell, A.M., and Gosnold, W., 2013. GIS-based geothermal assessment of the Denver Basin, Colorado and Nebraska. Transactions, Geothermal Resources Council, 37, 941-943. Davies, G.R., and Smith, L.B., Jr., 2006. Structurally controlled hydrothermal dolomite reservoir facies: an overview. Amer. Assoc. Petroleum Geologists Bulletin, 90, 1641-1690. Deo, M., Roehner, R., Allis, R., and Moore, J., 2014. Modeling of geothermal energy production from stratigraphic reservoirs in the Great Basin. Geother- mics, 51, 3-45. EIA, 2014. Short-term energy and summer fuels outlook. Release date April, 2014. http://www.eia.gov/forecasts/steo/report/renew_co2.cfm. Garg, S.K., and Combs, J., 2010. Appropriate use of volumetric “heat in place” method and Monte Carlo calculations. Proc. 34th Workshop on Geothermal Reservoir Engineering, Stanford University. GEA, 2014. New GEA report details trends and substantial growth in global geothermal market. http//geo-energy.org . Grant, M.A., and Garg, S.K., 2012. Recovery factor for EGS. Proc. 37th Workshop on Geothermal Reservoir Engineering, Stanford University, 738-740. Heilweil, V.M., and Brooks, L.E., eds., 2011. Conceptual model of the Great Ba- sin carbonate and alluvial aquifer system. U.S.G.S. Scientific Investigations Report 2010-5193, pp. 191. Hicks, B. E., 2013. Presentation on June 3, 2013. North Dakota Division of Min- eral Resources, Oil and Gas Activity Update. https://www.dmr.nd.gov/oilgas/ presentations/ActivityUpdate2013-06-03SDARLBis.pdf. Jeanloz, R., and Stone, H.A., 2014. JASON review of Enhanced Geothermal Systems. Proc. 39th Workshop on Geothermal Reservoir Engineering, Stan- ford University, 1-4. Jones, N., 2013. Russian oil and gas: no guarantees for growth. GEOExpro, 10, Issue 5, 77-79. Kirby, S. M., 2012. Summary of compiled permeability with depth measurements for basin, igneous, carbonate, and siliciclastic rocks in the Great Basin and adjoining regions. Open File Report 602, Utah Geological Survey, pp. 9. Masbruch, M.D., Heilweil, V.M., and Brooks, L.E., 2012. Using hydrogeo- logic data to evaluate geothermal potential of the Eastern Great Basin. Transactions, Geothermal Resources Council, 36, 47-52. McNutt, M., Camelli, Crone, T., Guthrie, G., Hsieh, P., Ryerson, T., Sayas, O., and Shaffer, F., 2012. Review of the flow estimates of the Deepwater Horizon oil spill, Proc. National Academy of Sciences, USA, 109 (50), 20260-20267. Mines, G., Allis, R., Moore, J., and Hanson, H., 2014. Economics of devel- oping hot stratigraphic reservoirs. Transactions, Geothermal Resources Council, 38, this volume. Moore, J.N., and Allis, R.G., 2013. Novel Geothermal Development of Deep Sedimentary Systems in the United States. Stage Gate Report. Unpub. report to the DOE under contract DE-EE0005128, 46 p. NVEnergy, 2014. One Nevada transmission line (ON Line). https://www. nvenergy.com/company/projects/images/ONLineTransmissionLine- FactSheet.pdf. Pinto, E., Mota, J., Grable, J., and Ward, D., 2013. Improving directional drilling tool reliability for HPHT horizontal wells in the Haynesville shale. World Oil, 97-101, February issue. Sanyal, S. K., Morrow, J.W., and Butler, S.J., 2007. Geothermal well produc- tivity: why hotter is not always better. Trans. GRC. 31, 573-579. Schelling, D., Allis, R., and Sprinkel, D. 2013. Role of seismic reflection profiles in delineating basin-centered geothermal reservoirs. . Transac- tions, Geothermal Resources Council, 37, 1051-1057. Society of Petroleum Engineers, 2013. Website information on oil properties; http://petrowiki.org/Oil_viscosity ; accessed December, 2013. Allis and Moore 1015PDF Image | Can Deep Stratigraphic Reservoirs Sustain 100 MW Power Plants
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