Yardsticks for industrial tomography

Vesnaver, Aldo

doi:10.1111/j.1365-2478.2008.00690.x

Cited by 9 publications

(4 citation statements)

References 74 publications

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“…We also discarded events whose offset is larger than 6 km. This resulted in 2 648 000 arrivals from active seismic, i.e., quite a low figure when compared with current industrial practice (Vesnaver 2008). The number of events from passive seismic may appear large, totalling 540 000 but this is due to the quite high number of wells (5) and receivers per well (45), while the number of events per well (1200) is a rough average from the literature.…”

Section: J O I N T 3 D T O M O G R a P H Ymentioning

confidence: 96%

Joint 3D processing of active and passive seismic data

Vesnaver

Lovisa

Böhm

2010

Geophysical Prospecting

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A B S T R A C TPassive 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.

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Section: J O I N T 3 D T O M O G R a P H Ymentioning

confidence: 96%

Joint 3D processing of active and passive seismic data

Vesnaver

Lovisa

Böhm

2010

Geophysical Prospecting

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“…Prestack migration requires fewer assumptions than poststack in the variations in the lithology and fluid content over the span of the gathered traces; prestack migration is hence used to handle complex structures and velocity fields, thanks to highperformance computing (Vesnaver, 2008). The data processing workflow for prestack depth migration (such as for subsalt depth imaging) is a complex interplay of several steps.…”

Section: Seismic Depth Imaging: Stacking and Migrationmentioning

confidence: 99%

Applications of tomography in oil-gas industry – Part 1

Xie¹

2015

Industrial Tomography

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“…12 hours to be inverted on a small cluster of eight CPUs. We are aware that jobs with over 260 million travel-times required a few days on a larger and faster cluster of 64 CPUs [Vesnaver 2008]. Much larger jobs are needed nowadays, as seismic acquisition systems with 200,000 channels are used in the field, and new ones with 1 million channels are being introduced [Poggiagliolmi et al 2012].…”

Section: Computational Aspectsmentioning

confidence: 99%

Full three-dimensional relocation and tomographic inversion of the 1977-2008 earthquakes in north-eastern Italy: a feasibility study

Vesnaver

Urpi²

2013

Annals of Geophysics

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<p>In a regional seismological network, the estimation of the epicenter is usually robust, especially for events inside or close to the network boundaries. In contrast, the hypocentral depth is very sensitive to the assumed velocity field. In this study, we compare the hypocenter estimates obtained by a classical algorithm in a simple one-dimensional (1D) model with a recently developed full 3D model that is based on shrinking grids. This study is preliminary, as the 3D Earth model is based on limited data from the literature; however, it demonstrates that different patterns show up when a more representative geological model is adopted. This encourages further studies, based on fully integrated 3D models from active surface seismic, well data and other geophysical measurements. Such an integrated approach has been successfully adopted by the oil and gas industries for decades, which has increased the exploration success rate and the production of hydrocarbon reservoirs.</p>

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Yardsticks for industrial tomography

Cited by 9 publications

References 74 publications

Joint 3D processing of active and passive seismic data

Joint 3D processing of active and passive seismic data

Applications of tomography in oil-gas industry – Part 1

Full three-dimensional relocation and tomographic inversion of the 1977-2008 earthquakes in north-eastern Italy: a feasibility study

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