Innovative Approach to Cooperative Inversion for Seismic and Gravity Data
Explore a structure-based constraint for cooperative inversion problems in seismic and gravity data interpretation. Learn about significant results and ongoing work in the field of integrated geophysical imaging.
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Presentation Transcript
Mahtab Rashidifard1, 2, Jrmie Giraud1, 2, Vitaliy Ogarko1, Mark Jessell1,2 and Mark Lindsay1, 2. 1Centre of Exploration Targeting (School of Earth Sciences), University of Western Australia, 35 Stirling Highway, Crawly, WA, 6009, Australia 2Mineral Exploration Cooperative Research Centre, School of Earth Sciences, University of Western Australia, 35 Stirling Highway, WA Crawley 6009, Australia
Main Focus Introduce a structure-based constrain for cooperative and joint inversion problems Proof-of-concept of the constrain on cooperative inversion of seismic and gravity data
Seismic tomography Seismic tomography Reflectivity Profile First arrivals modelled by, Eikonal Eqn: Slowness Model Inversion ?? ??,??,? = ?(?)
Formulating inversion of gravity data based on seismic Formulating inversion of gravity data based on seismic inversion result inversion result Hint: Generally speaking, W can be any prior information Seismic Inversion result Weighting matrix of the cross- gradient from Reflectivity section
Results Improvement using the proposed constraint Gravity Inversion without constrain Gravity Inversion constrained with seismic section Gravity Inversion constrained with weighted cross-gradient
Ongoing and future work: Co-operative inversion of Reflection seismic and gravity data in hard-rock Gravity inversion constrained by sparse seismic lines
References: - Moorkamp, M., Leli vre, P. G., Linde, N., & Khan, A. (2016). Integrated imaging of the earth: Theory and applications (Vol. 218). John Wiley & Sons. - Meju, M. A., & Gallardo, L. A. (2016). Structural Coupling Approaches in Integrated Geophysical Imaging. In Integrated Imaging of the Earth, Teory and Application (pp. 49 69). New Jersey: John Wiley & Sons. - Leli vre, P. G., Farquharson, C. G., & Hurich, C. A. (2010a). Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to mineral exploration. Society of Exploration Geophysicists International Exposition and 80th Annual Meeting 2010, SEG 2010, 77(1), 1758 1762. - Lines, L., Schultz, A. K., & Treitel, S. (1987). Cooperative inversion of geophysical data. 1987 SEG Annual Meeting, (July), 814 816.
