NUMERICAL SIMULATION OF FIRST-ORDER BACKSCATTERED P AND S WAVES FOR TIME-LAPSE SEISMIC IMAGING IN HETEROGENEOUS RESERVOIRS
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dc.contributor.author | Leary P.C. | |
dc.date.accessioned | 2021-05-04T04:34:44Z | |
dc.date.available | 2021-05-04T04:34:44Z | |
dc.date.issued | 2002 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=1205255 | |
dc.identifier.citation | Geophysical Journal International, 2002, 148, 3, 402-425 | |
dc.identifier.issn | 0956-540X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/28341 | |
dc.description.abstract | First-order elastic wave scattering theory, validated in general features by deep-borehole seismic coda wave observations, is used to numerically simulate time-lapse borehole seismic data aimed at monitoring oil-water substitution in heterogeneous hydrocarbon reservoirs. A first-order perturbation solution of the vector wave equation leads to P-P and S-S backscattered displacement vector motion expressed as the angular summation of the second radial derivative of P - and S -wave velocity and density fluctuations α '/α, β '/β, ρ '/ρ over expanding spherical wave fronts of radii ξ = αt /2 and ξ = βt /2. P - and S -wave velocity and density spatial heterogeneity is modelled as long-range correlated random fluctuations consistent with the power-law-scaling character of crustal rock physical properties measured by borehole logs. The spectra of model scattering displacement seismograms for a power-law-scaling volumetric noise distribution duplicate the frequency enrichment observed in the spectra of broadband earthquake coda waves recorded in a deep well. Modelling of time-lapse scattering in power-law-scaling permeability structures suggests that a stable borehole seismic source can locate oil-water substitution in reservoir volumes tens of metres on a side at distances of up to a few hundred metres from an observation well using currently available borehole seismic technology. Time-lapse tracking of oil-water substitution and the monitoring of reservoir stress conditions can lead to spatially well-constrained reservoir models, despite large-scale, large-amplitude correlated random heterogeneity. | |
dc.subject | RESERVOIRS | |
dc.subject | SCATTERING | |
dc.subject | STATISTICAL METHODS | |
dc.subject | SYNTHETIC SEISMOGRAMS | |
dc.title | NUMERICAL SIMULATION OF FIRST-ORDER BACKSCATTERED P AND S WAVES FOR TIME-LAPSE SEISMIC IMAGING IN HETEROGENEOUS RESERVOIRS | |
dc.type | Статья |
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