000214084 001__ 214084
000214084 005__ 20181203024057.0
000214084 0247_ $$2doi$$a10.1002/ghg.1511
000214084 022__ $$a2152-3878
000214084 02470 $$2ISI$$a000363691600012
000214084 037__ $$aARTICLE
000214084 245__ $$aFault reactivation during CO2 sequestration: Effects of well orientation on seismicity and leakage
000214084 260__ $$bWiley Periodicals, Inc$$c2015$$aSan Francisco
000214084 269__ $$a2015
000214084 300__ $$a12
000214084 336__ $$aJournal Articles
000214084 520__ $$aInjection or withdrawal of fluid at depth may trigger felt seismicity. Such human-induced seismicity is a key environmental concern related to the exploitation of natural underground resources. Thus, understanding how to avoid triggering felt earthquakes plays a crucial role in the success of underground anthropogenic activities, such as CO2 geological storage. In this work, we conduct 3D simulations of injection-triggered fault reactivation, in order to investigate the effects of well geometry on seismic rupture and CO2 leakage. We analyze two different cases of injection, through (1) a vertical and (2) a horizontal well. Simulation results for the vertical well show the fault pressurizing faster and more locally than for the horizontal well, resulting in a smaller seismic event. For the horizontal well, the pressure is distributed over a wider area along the fault, which requires a longer time to reactivate, but results in a larger event. Fault reactivation also produces changes in damage-zone and fault-core permeability, allowing the CO2 to leak from the injection zone through overlying caprock, toward shallower depths. Although the calculated fault permeability enhancement is similar for the two cases, results show a slightly higher leakage rate for the vertical well in the region close to the well itself, while the leakage resulting from injection through the horizontal well is more widely distributed.Published 2015. This article is a U.S. Government work and is in the public domain in the USA.
000214084 6531_ $$ainduced seismicity
000214084 6531_ $$acarbon sequestration
000214084 6531_ $$ageomechanics
000214084 6531_ $$afault reactivation
000214084 700__ $$uUniv Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA$$aRinaldi, Antonio P.
000214084 700__ $$0248652$$g253776$$uUniv Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA$$aVilarrasa, Victor
000214084 700__ $$uUniv Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA$$aRutqvist, Jonny
000214084 700__ $$aCappa, Frederic$$uUniv Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
000214084 773__ $$j5$$tGreenhouse Gases-Science And Technology$$k5$$q645-656
000214084 909C0 $$xU10264$$0252080$$pLMS
000214084 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:214084
000214084 917Z8 $$x105611
000214084 937__ $$aEPFL-ARTICLE-214084
000214084 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000214084 980__ $$aARTICLE