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dc.contributor.authorLopez Comino, Jose Angel
dc.contributor.authorGalis, Martin
dc.contributor.authorMai, Paul Martin
dc.contributor.authorChen, X.
dc.contributor.authorStich, Daniel
dc.identifier.citationLópez-Comino, J.-Á., galis, martin, Mai, P. M., Chen, X., & Stich, D. (2019). Lateral migration patterns toward or away from injection wells for earthquake clusters in Oklahoma. doi:10.1002/essoar.10501094.1
dc.description.abstractExploring the connections between injection wells and seismic migration patterns is key to understanding processes controlling growth of fluid-injection induced seismicity. Numerous seismic clusters in Oklahoma have been associated with wastewater disposal operations, providing a unique opportunity to investigate migration directions of each cluster with respect to the injection-well locations. This study focuses on new strategies to identify and quantify lateral migration toward or away from the injection wells. First, a comprehensive migration analysis is described to reach a representative migration vector for each seismic cluster. Next, we propose a new approach to define a well vector associated with multiple injection points, taking into account cumulative injected-volume and the injection-rate volume weighting, and considering also the expansion of the diffusion front. Injected fluids can be associated with an earthquake cluster only if they have sufficient time to reach the location of the cluster. Finally, new directivity migration parameters are introduced comparing the direction of migration and well vectors. Our results suggest a relationship between migration patterns and the cluster-well distances, but unclear relationship with injected volume and equivalent magnitudes. At shorter distances (up to ~13 km), we observe dominantly migration away from injection wells (particularly for distances shorter than ~5 km) that could be attributed to pore-pressure changes. However, we also find an opposite behavior, migration toward the wells, for larger distances, suggesting an increasing influence of poroelastic stress changes. This finding is more stable when considering cumulative injected-volume instead of injection-rate.
dc.description.sponsorshipWe thank the Oklahoma Geological Survey (OGS) and USGS for continuous monitoring earthquake activities in Oklahoma. The research presented in this article is supported by King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia, by FRAGEN project (Fracture activation in geo-reservoirs - physics of (induced) earthquakes in complex fault networks), URF/1/3389-01-01, BAS/1/1339-01-01, and Spanish project CGL2015-67130-C2-2-R. J.A.L.C has also received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement Nº 754446 and UGR Research and Knowledge Transfer Found – Athenea3i; and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer (407141557). We also thank Justin Rubinstein and Simone Cesca for constructive comments and discussions.
dc.rightsArchived with thanks to Bull. Seis. Soc. Am.
dc.titleLateral migration patterns toward or away from injection wells for earthquake clusters in Oklahoma
dc.titleLateral migration relationships toward or away from injection wells revealed from Oklahoma seismic clusters
dc.contributor.departmentComputational Earthquake Seismology (CES) Research Group
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentKAUST, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSubmitted to Bulletin of the Seismological Society of America
dc.contributor.institutionInstitute of Geosciences, University of Potsdam, D-14476 Potsdam-Golm, Germany
dc.contributor.institutionInstituto Andaluz de Geofísica, Universidad de Granada, Granada, Spain.
dc.contributor.institutionDepartamento de Física Teórica y del Cosmos, Universidad de Granada, Granada, Spain.
dc.contributor.institutionFaculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Slovakia
dc.contributor.institutionEarth Science Institute, Slovak Academy of Sciences, Bratislava, Slovakia
dc.contributor.institutionSchool of Geosciences, The University of Oklahoma, Norman, OK, USA
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personLopez Comino, Jose Angel
kaust.personMai, Paul Martin

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