Anisotropic 2.5D - 3C Finite-difference Modeling

Kostyukevych, A.; Marmalevskyi, N.; Roganov, Y.; Tulchinsky, V.

doi:10.3997/2214-4609.20147859

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Thus, to understand the time‐lapse seismic response of both travel‐time and amplitude changes, we perform a 2.5D elastic, finite‐difference modelling study that refers to a 3D wave propagation over a 2D model of the subsurface (Costa, Neto, and Novais ; Kostyukevych et al . ). This will aid the quantitative interpretation of the field measurements and later in the VSR.…”

Section: Vertical Seismic Profile Data Analysis and Resultsmentioning

confidence: 97%

“…Second, we implement a forward modelling exercise using 2.5D elastic, finite‐difference modelling (Kostyukevych et al . ) to predict the time‐lapse VSP response and compare with the real data response. Third, we perform a quality check of the input parameters for the rock physics model, assessing the uncertainties and their effect on the drained frame properties' estimation.…”

Section: Introductionmentioning

confidence: 99%

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Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Hosni

Caspari

Pevzner

et al. 2016

Geophysical Prospecting

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CO2 sequestration projects benefit from quantitative assessment of saturation distribution and plume extent for field development and leakage prevention. In this work, we carry out quantitative analysis of time‐lapse seismic by using rock physics and seismic modelling tools. We investigate the suitability of Gassmann's equation for a CO2 sequestration project with 1600 tons of CO2 injected into high‐porosity, brine‐saturated sandstone. We analyze the observed time delays and amplitude changes in a time‐lapse vertical seismic profile dataset. Both reflected and transmitted waves are analyzed qualitatively and quantitatively. To interpret the changes obtained from the vertical seismic profile, we perform a 2.5D elastic, finite‐difference modelling study. The results show a P‐wave velocity reduction of 750 m/s in the proximity of the injection well evident by the first arrivals (travel‐time delays and amplitude change) and reflected wave amplitude changes. These results do not match with our rock physics model using Gassmann's equation predictions even when taking uncertainty in CO2 saturation and grain properties into account. We find that time‐lapse vertical seismic profile data integrated with other information (e.g., core and well log) can be used to constrain the velocity–saturation relation and verify the applicability of theoretical models such as Gassmann's equation with considerable certainty. The study shows that possible nonelastic factors are in play after CO2 injection (e.g., CO2–brine–rock interaction and pressure effect) as Gassmann's equation underestimated the velocity reduction in comparison with field data for all three sets of time‐lapse vertical seismic profile attributes. Our work shows the importance of data integration to validate the applicability of theoretical models such as Gassmann's equation for quantitative analysis of time‐lapse seismic data.

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Section: Vertical Seismic Profile Data Analysis and Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Hosni

Caspari

Pevzner

et al. 2016

Geophysical Prospecting

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show abstract

“…The second problem is the synthesis of 3D-seismograms from the geological model of the medium by the 2.5D method of finite-difference elastic anisotropic modeling (M2.5D) [3]. Unlike alternative methods of obtaining synthetic 3D-seismograms (radiation modeling and finite-difference acoustic modeling), the M2.5D can take into account the thin layering, spatial anisotropy of characteristics (TTI) and a combination of several spatial fracturing systems.…”

Section: Seismic Data Processingmentioning

confidence: 99%

Application of SCIT supercomputers to develop and execute parallel geophysical programs

Tulchinsky

2009

Cybern Syst Anal

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The experience of developing parallel programs for seismic exploration is described. Seismic datasets are usually extensive and have easily decomposable structure. These features result in similar paralleling techniques for different problems such as trace-by-trace processing, migrations, and finite-difference modeling. The paralleling project development is described in terms of a pattern language for parallel programming and Saaty's analytic hierarchy process. The parallel data processing is analyzed for efficiency.

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References

2019

Numerical Modeling of Seismic Responses From Fractured Reservoirs by the Grid-Characteristic Method

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Anisotropic 2.5D - 3C Finite-difference Modeling

Cited by 4 publications

References 6 publications

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Application of SCIT supercomputers to develop and execute parallel geophysical programs

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Anisotropic 2.5D - 3C Finite-difference Modeling

Cited by 4 publications

References 6 publications

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO2 injection

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO2 injection

Application of SCIT supercomputers to develop and execute parallel geophysical programs

References

Contact Info

Product

Resources

About

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection

Case History: Using time‐lapse vertical seismic profiling data to constrain velocity–saturation relations: the Frio brine pilot CO₂ injection