Laboratory measurements of seismic velocities of CO2/brine mixtures at elevated temperatures up to 70°C and pressures up to 38 MPa

Olga Bilenko; Maxim Lebedev; Boris Gurevich

doi:10.1071/ASEG2013ab074

ISSN: 2202-0586
E-ISSN:

oa Laboratory measurements of seismic velocities of CO2/brine mixtures at elevated temperatures up to 70°C and pressures up to 38 MPa
Authors Olga Bilenko^a, Maxim Lebedev^b and Boris Gurevich^c
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^a Curtin UniversityDepartment of Exploration Geophysics, GPO Box U1987, Perth, WA, 6151, [email protected] ^b Curtin UniversityDepartment of Exploration Geophysics, GPO Box U1987, Perth, WA, 6151, [email protected] ^c Curtin UniversityDepartment of Exploration Geophysics, GPO Box U1987, Perth, WA, 6151, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2013, Issue ASEG2013 - 23rd Geophysical Conference, Dec 2013, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2013ab074
- Published online: 01 Dec 2013

Abstract

Phase equilibrium of CO2-brine fluids is important to studies related to CO2 sequestration in deep saline aquifers and CO2 enhanced oil recovery. Furthermore, the study of the seismic properties of CO2 saturated and not saturated brines as pore fluids helps to understand their influence on the 4D seismic properties of rocks.

In this work we reported results of measurements of the acoustic velocities in brines with dissolved CO2. We investigate the effects of pressure (from 2 MPa to 38 MPa), temperature (from 30 °C to 70 °C), and salinity (0, 10,000 ppm, 20,000 ppm, 40,000 ppm, 100,000 ppm) of KCl-NaCl brines on ultrasonic velocities. We also study the time lapse effect of CO2 dissolution into the brine.

It has been found that CO2 dissolution in brine has significantly changed acoustic properties of brine.

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2013-12-01

2026-01-17

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References

Batzle, M., and Wang, Z., 1992, Seismic properties of pore fluids: Geophysics 57, no. 11, 1396-1408.
Iglauer, S., 2011. Dissolution Trapping of Carbon Dioxide in Reservoir Formation Brine - A Carbon Storage Mechanism, Mass Transfer - Advanced Aspects, Dr. Hironori Nakajima (Ed.), ISBN: 978-953-307-636-2)
Han, D.H., Sun, M., and M. Batzle, 2009, CO2 velocity measurement and models for temperatures up to 200°C and pressures up to 100 MPa: Geophysics, 75, no. 3 123-129.
Oezguer, E., 2006, Assessment of diffusive and convective mechanisms during carbon dioxide sequestration into deep saline aquifers: Middle East Technical University.
Sun, M., and D. Han, 2009, Velocity Properties of CO2-saturated Water and Methane-saturated Water at Temperatures up to 200°C and Pressures up to 138 MPa, SEG Houston 2009 International Exposition and Annual Meeting, pp. 2095- 2099.
Yan, W., et al, 2011, Measurement and modeling of CO2 solubility in NaCl and CO?-saturated NaCl brine density: International Journal of Greenhouse Gas Control 5, 1460-1477.

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Article Type: Research Article

Keyword(s): brine; O2; P-wave velocities; rock physics; saturation; Supercritical CO2

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oa Laboratory measurements of seismic velocities of CO2/brine mixtures at elevated temperatures up to 70°C and pressures up to 38 MPa

Abstract

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