Wave energy focusing to subsurface poroelastic formations to promote oil mobilization

Handle URI:
http://hdl.handle.net/10754/600183
Title:
Wave energy focusing to subsurface poroelastic formations to promote oil mobilization
Authors:
Karve, P. M.; Kallivokas, L. F.
Abstract:
We discuss an inverse source formulation aimed at focusing wave energy produced by ground surface sources to target subsurface poroelastic formations. The intent of the focusing is to facilitate or enhance the mobility of oil entrapped within the target formation. The underlying forward wave propagation problem is cast in two spatial dimensions for a heterogeneous poroelastic target embedded within a heterogeneous elastic semi-infinite host. The semi-infiniteness of the elastic host is simulated by augmenting the (finite) computational domain with a buffer of perfectly matched layers. The inverse source algorithm is based on a systematic framework of partial-differential-equation-constrained optimization. It is demonstrated, via numerical experiments, that the algorithm is capable of converging to the spatial and temporal characteristics of surface loads that maximize energy delivery to the target formation. Consequently, the methodology is well-suited for designing field implementations that could meet a desired oil mobility threshold. Even though the methodology, and the results presented herein are in two dimensions, extensions to three dimensions are straightforward.
Citation:
Karve PM, Kallivokas LF (2015) Wave energy focusing to subsurface poroelastic formations to promote oil mobilization. Geophysical Journal International 202: 119–141. Available: http://dx.doi.org/10.1093/gji/ggv133.
Publisher:
Oxford University Press (OUP)
Journal:
Geophysical Journal International
Issue Date:
22-Apr-2015
DOI:
10.1093/gji/ggv133
Type:
Article
ISSN:
0956-540X; 1365-246X
Sponsors:
The authors’ work was partially supported by an Academic Excellence Alliance grant between the King Abdullah University of Science andTechnology in Saudi Arabia (KAUST) and the University of Texas at Austin. The support is gratefully acknowledged.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKarve, P. M.en
dc.contributor.authorKallivokas, L. F.en
dc.date.accessioned2016-02-28T06:44:38Zen
dc.date.available2016-02-28T06:44:38Zen
dc.date.issued2015-04-22en
dc.identifier.citationKarve PM, Kallivokas LF (2015) Wave energy focusing to subsurface poroelastic formations to promote oil mobilization. Geophysical Journal International 202: 119–141. Available: http://dx.doi.org/10.1093/gji/ggv133.en
dc.identifier.issn0956-540Xen
dc.identifier.issn1365-246Xen
dc.identifier.doi10.1093/gji/ggv133en
dc.identifier.urihttp://hdl.handle.net/10754/600183en
dc.description.abstractWe discuss an inverse source formulation aimed at focusing wave energy produced by ground surface sources to target subsurface poroelastic formations. The intent of the focusing is to facilitate or enhance the mobility of oil entrapped within the target formation. The underlying forward wave propagation problem is cast in two spatial dimensions for a heterogeneous poroelastic target embedded within a heterogeneous elastic semi-infinite host. The semi-infiniteness of the elastic host is simulated by augmenting the (finite) computational domain with a buffer of perfectly matched layers. The inverse source algorithm is based on a systematic framework of partial-differential-equation-constrained optimization. It is demonstrated, via numerical experiments, that the algorithm is capable of converging to the spatial and temporal characteristics of surface loads that maximize energy delivery to the target formation. Consequently, the methodology is well-suited for designing field implementations that could meet a desired oil mobility threshold. Even though the methodology, and the results presented herein are in two dimensions, extensions to three dimensions are straightforward.en
dc.description.sponsorshipThe authors’ work was partially supported by an Academic Excellence Alliance grant between the King Abdullah University of Science andTechnology in Saudi Arabia (KAUST) and the University of Texas at Austin. The support is gratefully acknowledged.en
dc.publisherOxford University Press (OUP)en
dc.titleWave energy focusing to subsurface poroelastic formations to promote oil mobilizationen
dc.typeArticleen
dc.identifier.journalGeophysical Journal Internationalen
dc.contributor.institutionDepartment of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, 30 East Dean Keeton St., Stop C1747, Austin, TX 78712, USA.en
kaust.grant.programAcademic Excellence Alliance (AEA)en
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