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Joint 3D processing of active and passive seismic data
Author(s) -
Vesnaver Aldo,
Lovisa Lara,
Böhm Gualtiero
Publication year - 2010
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.2010.00868.x
Subject(s) - passive seismic , borehole , geology , joint (building) , inversion (geology) , economic geology , regional geology , seismology , environmental geology , geophysical imaging , vertical seismic profile , data processing , igneous petrology , reflection (computer programming) , engineering geology , gemology , hydrocarbon exploration , tomography , geophysics , metamorphic petrology , geotechnical engineering , optics , tectonics , computer science , database , architectural engineering , physics , volcanism , engineering , programming language
Passive seismic provides additional illumination sources in producing reservoirs, improving the Earth's imaging obtained by standard 3D seismic surveys. The joint tomographic inversion of surface and borehole data, both active and passive, even allows the delineation of thin reservoirs that cannot be resolved by reflection tomography. As an application example, we present a feasibility study for a real case of CO 2 geological storage, showing that this operation may benefit both environment and reservoir monitoring. The origin time of micro‐earthquakes due to production operations is critical for merging active and passive data. We show here that the Wadati's method is not accurate for borehole data in a layered earth model, when the ratio between P and S velocities is not constant, as occurs in most hydrocarbon reservoirs. This drawback can be solved by deploying a few receivers at the surface close to the well.