{"@type": "dcat:Dataset", "DOI": "10.15121/1542062", "accessLevel": "public", "bureauCode": ["019:20"], "contactPoint": {"@type": "vcard:Contact", "fn": "Greg Nash", "hasEmail": "mailto:gnash@egi.utah.edu"}, "dataQuality": true, "description": "The U.S. Department of Energy's (U.S. DOE) Frontier Observatory for Research in Geothermal Energy (FORGE) is a field laboratory that provides a unique opportunity to develop and test new technologies for characterizing, creating and sustaining Enhanced Geothermal Systems (EGS) in a controlled environment.\n\nIn 2018, the U.S. DOE selected a site in south-central Utah for the FORGE laboratory. Numerous geoscientific studies have been conducted in the region since the 1970s in support of geothermal development at Roosevelt Hot Springs. A vertical scientific well, 58-32, was drilled and tested to a depth of 2290 m (7515 ft) GL in 2017 on the FORGE site to provide additional characterization of the reservoir rocks. The well encountered a conductive thermal regime and a bottom hole temperature of 199degC (390degF). More than 2000 natural fractures were identified, but measured permeabilities are low, less than 30 micro-darcies. Induced fractures indicate that the maximum horizontal stress trends NNE-SSW, consistent with geologic and well observations from the surrounding area. Approximately 45 m (147 ft) at the base of the well was left uncased. A maximum wellhead pressure of 27.6 MPa (4000 psig) at an injection rate of ~1431 L/min (~9 bpm) was measured during stimulation testing in September 2017. Conventional diagnostic evaluations of the data suggest that hydraulic fracturing and shearing occurred. Estimates of the stress gradient for delta_h_min range from of 16.7 to 17.6 kPa/m (0.74 to 0.78 psi/ft). A gradient of 25.6 kPa/m (1.13psi/ft) was calculated for delta_V.\n\nIn 2019, the 2017 open-hole stimulation in well 58-32 was repeated with injection rates up to 2385 L/min (15 bpm). Two additional stimulations were conducted in the cased portion of the well; one to stimulate critically stressed fractures and the second to test noncritically stressed fractures. Breakdown of the zone spanning critically-stressed fractures occurred at a surface pressure of\napproximately 29.0 MPa (4200 psig). Although stimulation of the noncritically stressed fractures was interrupted by failure of the bridge plug beneath the perforated interval, micro-seismic data suggests stimulation of the fractures may have been initiated at a surface pressure of 45.5 MPa (6600 psig). These stimulation results support the conclusion the Mineral Mountains granitoid is an appropriate\nhost for EGS development.\n\nMicro-seismicity was monitored during the stimulations using surface and downhole instrumentation. Five seismometers and a nodal array of 150 seismic sensors were deployed on the surface. A Distributed Acoustic Sensing (DAS) cable and a string of 12 geophones were deployed in well 78-32, drilled to a depth of 998 m (3274 ft) GL. A broadband sensor and a high-temperature geophone were\ndeployed in well 68-32, drilled to a depth of 303 m (994 ft) GL. More than 420 micro-seismic events were detected by the geophone string. Other instruments detected fewer events.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://gdr.openei.org/submissions/1149", "description": "Link to separate GDR submission containing Open-hole, upper perforation, and lower perforation stimulation data for well 58-32.", "format": "HTML", "mediaType": "text/html", "title": "Well 58-32 Stimulation Data"}, {"@type": "dcat:Distribution", "accessURL": "https://gdr.openei.org/files/1146/Moore_UtahFORGE_overview_Stanford_2020.pdf", "description": "Link to Stanford paper providing a detailed overview of the stimulations conducted as part of the Utah FORGE project", "format": "pdf", "mediaType": "application/pdf", "title": "Utah FORGE Overview Stanford Paper.pdf"}], "identifier": "https://data.openei.org/submissions/7290", "issued": "2019-04-24T06:00:00Z", "keyword": ["geothermal", "energy", "Utah FORGE", "open hole stimulation", "Well 58-32 stimulation", "Well 58-32", "Utah geothermal", "GRG", "EGS", "disccrete fracture flow", "reservoir stimulation", "stimulation", "hydraulic fracturing", "phase 2c", "FORGE", "pressure", "flowback", "rate", "temperature", "hydraulic", "flow", "Utah", "open-hole", "Milford", "Roosevelt Hot Springs", "pre-processed", "upper perforation", "lower perforation", "microseismicity", "DAS", "distributed acoustic sensing", "geophysics"], "landingPage": "https://gdr.openei.org/submissions/1146", "license": "https://creativecommons.org/licenses/by/4.0/", "modified": "2021-07-12T20:49:49Z", "programCode": ["019:006"], "projectLead": "Lauren Boyd", "projectNumber": "EE0007080", "projectTitle": "Utah FORGE", "publisher": {"@type": "org:Organization", "name": "Energy and Geoscience Institute at the University of Utah"}, "spatial": "{\"type\":\"Polygon\",\"coordinates\":[[[-112.916367,38.483935],[-112.879748,38.483935],[-112.879748,38.5148],[-112.916367,38.5148],[-112.916367,38.483935]]]}", "title": "Utah FORGE: Well 58-32 Stimulation Conference Paper and Data"}