?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Fepisodesplatform.eu%2Feprints%2F2281%2F&rft.title=D5.5%0D%0AValidation+of+model+for+fluid+migration%0D%0Aagainst+field+site+data&rft.creator=Meier%2C+Tobias&rft.subject=Technology-seismicity+interaction&rft.subject=St.+Gallen&rft.subject=Geothermal+energy+production&rft.description=The+S4CE+considers+a+variety+of+sub-surface+geo-energy+operations.+Among+others%2C+the%0D%0Aextraction+of+resources+and+energy+from+the+subsurface+is+commonly+linked+with+hazards+like%0D%0Acollapse+of+mines+or+shafts%2C+possible+pollution+of+the+subsurface+and%2For+induced+seismicity.%0D%0AThe+latter+has+aroused+attention+in+the+previous+years+due+to+newly+developed+techniques+for%0D%0Ahydraulically+stimulation+of+rock+masses+for+the+extraction+of+hydrocarbons+from+lowpermeable+shale+rocks+(e.g.%2C+unconventional+reservoirs)+or+enhancing+geothermal+reservoirs%0D%0Aby+massive+hydraulic+stimulations+to+create+fluid+pathways+between+geothermal+wells.%0D%0AHowever%2C+not+only+hydraulic+stimulations+can+cause+induced+seismicity.+Injection+of+wastewater+has+also+been+linked+to+seismicity+in+the+previous+years+as+for+example+shown+by%0D%0ALangenbruch+et+al.+(2018).%0D%0AIn+order+to+understand+the+influence+of+fluid+injections+on+induced+seismicity%2C+the%0D%0Adeliverable+D5.5+%E2%80%9CValidation+of+model+for+fluid+migration+against+field+site+data%E2%80%9D+has+been%0D%0Aplanned+within+the+S4CE+consortium.+The+deliverable+forms+a+key+aspect+within+S4CE%2C+since%0D%0Athe+extraction+of+geothermal+energy+is+part+of+renewable+energy+production%2C+which+is+needed%0D%0Afor+a+smooth+transition+from+hydrocarbon-based+energy+production+towards+a+C02-free%0D%0Aenergy+production.+It+is+therefore+of+importance+to+reduce+the+risks+related+to+geothermal%0D%0Aoperations+and+to+enable+a+safe+production+of+this+renewable+energy.%0D%0AThe+S4CE+consortium+has+access+to+a+few+sites+across+Europe.+Among+these%2C+the+St.+Gallen%0D%0Ageothermal+site+has+been+selected+because+the+related+recorded+seismicity+had+already+been%0D%0Aprocessed+by+the+Swiss+Seismological+Service+(SED).+The+SED+located+the+seismicity+in%0D%0ASt.+Gallen+to+a+depth+below+the+injection+well%2C+situated+in+a+most-likely+over-pressurized%0D%0Atrough+of+Permo-Carboniferous+age.+The+distance+from+the+seismicity+to+the+injection+well%0D%0Amakes+the+fluid+transport+mechanism+from+the+well+to+the+Permo-Carboniferous+Trough+(PCT)%0D%0Achallenging+to+understand%2C+since+an+over-pressurized+trough+would+cause+fluids+to+migrate%0D%0Aupwards+rather+than+downwards.+Structural+data+as+well+as+injection+data+have+been+made%0D%0Aavailable+to+the+S4CE+consortium%2C+which%2C+therefore%2C+makes+the+St.+Gallen+data+set+an+excellent%0D%0Adata+set+for+numerical+simulations%2C+which+might+be+a+tool+for+predictions+of+induced+seismicity%0D%0A(e.g.%2C+Meier+and+Backers%2C+2017%3B+Gaucher+et+al.%2C+2015+and+references+therein).+The+findings%0D%0Apresented+in+D5.5+shall+provide+a+better+understanding+on+how+injected+fluids+in+fault-based%0D%0Asubsurface+reservoirs+can+induce+seismicity+and+thereby+damage+above-surface+constructions.%0D%0AFor+this+purpose%2C%0D%0A%EF%82%B7+a+structural+subsurface+model+has+been+reevaluated+and+enhanced+to+accommodate%0D%0Aan+over-pressurized+PCT+beneath+the+geothermal+well%0D%0A%EF%82%B7+the+stress+field+has+been+determined%0D%0A%EF%82%B7+injection+data+has+been+collected+and+implemented+into+the+numerical+models%0D%0A%EF%82%B7+two+scenarios+have+been+investigated+numerically+that+could+have+caused+the%0D%0Aobserved+seismicity%3A%0D%0Ao+poroelastic+stress+transfer+from+the+well+to+the+PCT%0D%0Ao+fast+transport+of+the+fluid+from+the+well+to+the+PCT+via+existing+fracture+systems&rft.publisher=Science+For+Clean+Energy+Project&rft.date=2020-02&rft.type=Reports&rft.type=NonPeerReviewed&rft.identifier=++Meier%2C+Tobias++(2020)+D5.5+Validation+of+model+for+fluid+migration+against+field+site+data.++Documentation.+Science+For+Clean+Energy+Project.+++++&rft.relation=http%3A%2F%2Fscience4cleanenergy.eu%2Fwp-content%2Fuploads%2F2020%2F04%2FS4CE_D5.5_Final.pdf