000015935 001__ 15935
000015935 005__ 20161115135334.0
000015935 04107 $$aeng
000015935 046__ $$k2013-06-12
000015935 100__ $$aKarve, P.
000015935 24500 $$aAn Inverse Source Problem for Focusing Wave Energy To Targeted Subterranean Formations

000015935 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015935 260__ $$bNational Technical University of Athens, 2013
000015935 506__ $$arestricted
000015935 520__ $$2eng$$aI discuss a PDE-constrained optimization approach for constructing optimal excitations capable of imparting a maximal outcome to a target underground formation, by steering the focusing of the excitation energy to the formation. The motivation stems from the possibility of “shaking” sufficiently strongly (via ground, wellbore, or other sources) a target reservoir zone to increase oil mobility. However, the applications are not limited to Enhanced Oil Recovery (EOR) purposes. The method leads formally to an inverse source problem, where the tempo-spatial characteristics of the source are sought in order to maximize the kinetic energy, or the acceleration field, or other mobility metrics, in the targeted formation, subject to the physics of the associated wave propagation problem. The inverse source problem is resolved on a PML-truncated finite computational domain using a hybrid method (a conventional single-field coupled with a mixed) that is dealt with numerically using finite elements. I report numerical experiments in idealized heterogeneous formations, which show robustness of the optimization scheme (Fig. 1). I also discuss practical strategies for optimal illumination of the targeted formations. f(t) 2.5 m

000015935 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015935 653__ $$a

000015935 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015935 720__ $$aKarve, P.$$iJeong, C.$$iKallivokas, L.
000015935 8560_ $$ffischerc@itam.cas.cz
000015935 8564_ $$s652625$$uhttps://invenio.itam.cas.cz/record/15935/files/1729.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 24 ADVANCES IN MODELING OF WAVE PROPAGATION AND APPLICATIONS
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000015935 962__ $$r15525
000015935 980__ $$aPAPER