{"title":"Maximum size and magnitude of injection-induced slow slip events","authors":"Alexis Sáez, François Passelègue, Brice Lecampion","doi":"arxiv-2409.03330","DOIUrl":null,"url":null,"abstract":"Fluid injections can induce aseismic slip, resulting in stress changes that\nmay propagate faster than pore pressure diffusion, potentially triggering\nseismicity at significant distances from injection wells. Constraining the\nmaximum extent of these aseismic ruptures is thus important for better\ndelineating the influence zone of injections concerning their seismic hazard.\nHere we derive a scaling relation based on rupture physics for the maximum size\nof aseismic ruptures, accounting for fluid injections with arbitrary flow rate\nhistories. Moreover, based on mounting evidence that the moment release during\nthese operations is often predominantly aseismic, we derive a scaling relation\nfor the maximum magnitude of aseismic slip events. Our theoretical predictions\nare consistent with observations over a broad spectrum of event sizes, from\nlaboratory to real-world cases, indicating that fault-zone storativity,\nbackground stress state, and injected fluid volume are key determinants of the\nmaximum size and magnitude of injection-induced slow slip events.","PeriodicalId":501270,"journal":{"name":"arXiv - PHYS - Geophysics","volume":"12 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Geophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.03330","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Fluid injections can induce aseismic slip, resulting in stress changes that
may propagate faster than pore pressure diffusion, potentially triggering
seismicity at significant distances from injection wells. Constraining the
maximum extent of these aseismic ruptures is thus important for better
delineating the influence zone of injections concerning their seismic hazard.
Here we derive a scaling relation based on rupture physics for the maximum size
of aseismic ruptures, accounting for fluid injections with arbitrary flow rate
histories. Moreover, based on mounting evidence that the moment release during
these operations is often predominantly aseismic, we derive a scaling relation
for the maximum magnitude of aseismic slip events. Our theoretical predictions
are consistent with observations over a broad spectrum of event sizes, from
laboratory to real-world cases, indicating that fault-zone storativity,
background stress state, and injected fluid volume are key determinants of the
maximum size and magnitude of injection-induced slow slip events.