Using time-lapse VSP data to constrain velocity-saturation relations

Mohammed Al Hosni; Eva Caspari; Roman Pevzner; Thomas M. Daley; Boris Gurevich

doi:10.1071/ASEG2015ab153

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Using time-lapse VSP data to constrain velocity-saturation relations
Authors Mohammed Al Hosni^a, Eva Caspari^b, Roman Pevzner^c, Thomas M. Daley^d and Boris Gurevich^e
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^a Curtin University, GPO Box U1987, Perth, , WA, 6845, [email protected] ^b Curtin University, GPO Box U1987, Perth, , WA, 6845, [email protected] ^c Curtin University, , CSIRO GPO Box U1987, Perth, , WA, 6845, [email protected] ^d LBNL 1 Cyclotron Road Berkeley, , CA, 94720, , US, [email protected] ^e Curtin University, CSIRO, GPO Box U1987, Perth, , WA, 6845, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2015ab153
- Published online: 01 Dec 2015

Abstract

Quantitative interpretation of time-lapse seismic data is an ongoing challenge. Understanding the velocity-saturation relations and changes caused by CO2 injection play an important role for the application of seismic monitoring techniques to carbon dioxide storage projects.

High uncertainties associated with well log measurements affected by borehole conditions can affect our ability to constrain a rock physics model. Seismic measurements, such as Vertical Seismic Profile (VSP), that span both the near-well region and far beyond the borehole can provide good control for correcting these measurements and reducing the uncertainties thereafter.

In this paper, we analyse the observed time delays in time-lapse VSP data from the Frio CO2 injection test site by employing an integrated approach of rock physics and seismic forward modelling to reduce uncertainties in the choice of the dry frame modulus and velocity-saturation relations. First, we confirmed the quality of pre-injection well logs velocities with VSP data. Afterwards, we use inverse Gassmann relations to calculate the dry frame properties of the reservoir with different input parameters for the grain moduli with fluid substitution applied for uniform saturation of brine and CO2. Finally, forward modelling of the results is implemented to compare the response with field VSP data.

Our investigation shows that VSP data can help constrain the choice of dry frame modulus, and thus the velocity-saturation relation. The rock physics model best matches the VSP results using large grain moduli and uniform saturation for fluid substitution.

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References

Carcione, J.M., Picotti, S., Gei, D., and Rossi, G., 2006, Physics and seismic modeling for monitoring CO2 storage. Pure and Applied Geophysics, 163, 175-207.
Daley, T., Myer, L., Peterson, J.E., Majer, E.L., and Hoversten, G.M., 2008, Time-lapse crosswell seismic and VSP monitoring of injected CO2 in a brine aquifer. Environmental Geology, 54, 1657-65.
Doughty, C., Freifeld, B.M., and Trautz, R.C., 2008, Site characterization for CO2 geologic storage and vice versa: the Frio brine pilot, Texas, USA as a case study. Environmental Geology, 54, 1635-56.
Hashin, Z. and Shtrikman, S., 1963, A variational approach to the theory of the elastic behaviour of multiphase materials. Journal of the Mechanics and Physics of Solids, 11, 127-40.
Hovorka, S., 2009, Frio brine pilot: The first US sequestration test. Southwest Hydrology, 8, 26-31.
Hovorka, S.D., Benson, S.M., Doughty, C., Freifeld, B.M., Sakurai, S., Daley, T.M., Kharaka, Y.K., Holtz, M.H., Trautz, R.C., and Nance, H.S., 2006, Measuring permanence of CO2 storage in saline formations: the Frio experiment. Environmental Geosciences, 13, 105-21.
Kharaka, Y., Cole, D., Hovorka, S., Gunter, W., Knauss, K., and Freifeld, B., 2006, Gas-water-rock interactions in Frio Formation following CO2 injection: Implications for the storage of greenhouse gases in sedimentary basins. Geology, 34, 577-80.
Mavko, G., Mukerji, T., and Dvorkin, J., 2009, The Rock Physics Handbook : Tools for Seismic Analysis of Porous Media. Cambridge University Press.
Sakurai, S., Ramakrishnan, T., Boyd, A., Mueller, N., and Hovorka, S., 2006, Monitoring saturation changes for CO2 sequestration: petrophysical support of the Frio brine pilot experiment. Petrophysics, 47, 483-96.
Schmidt, H. and Tango, G., 1986, Efficient global matrix approach to the computation of synthetic seismograms. Geophysical Journal International, 84, 331-59.
Smith, T., Sondergeld, C., and Rai, C., 2003, Gassmann fluid substitutions: A tutorial. Geophysics, 68, 430-40.
Vanorio, T., Nur, A., and Ebert, Y., 2011, Rock physics analysis and time-lapse rock imaging of geochemical effects due to the injection of into reservoir rocks. Geophysics, 76, O23-O33.
Wood, A.B., 1955, A TEXTBOOK OF SOUND: THE PHYSICS OF VIBRATIONS. Bell and Sons.
Zhou, R., Huang, L., Rutledge, J., Daley, T., and Majer, E., 2008, Using the coda-wave interferometry method and time-lapse VSP data to estimate velocity changes from geological carbon sequestration in a brine aquifer. SEG Technical Program Expanded Abstracts 2008, 3199-203.

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Article Type: Research Article

Keyword(s): CO2; Modelling; Rock Physics; Time-lapse; VSP

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oa Using time-lapse VSP data to constrain velocity-saturation relations

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