Numerische Mehrphasen-Gesteinsphysik "Geophysik"
Final Report Abstract
The goal of ’Multiphase Numerical Rock Physics’ is to establish a third possibility to consider rock physical relationships in addition to theoretical and laboratory methods. Over the last twenty-five years computational resources increased significantly which enables me to perform very accurate and realistic studies today. The fundamental goal of rock physics is to find precise physical relationships between different rock properties. In particular, relationships between measurable properties, such as wave velocity, and properties of great interest that are not easily measured, such as permeability, are the ’holy grail’ of rock physics. My basic assumption is that the pore scale structure of the mineral grains, the mineral composition of the grains, and the pore fluid together completely determine physical rock properties. Mechanical properties, such as effective elastic properties, are important in many geophysical and industrial applications. However, complex pore geometry often makes modelling and simulation of effective elastic properties in porous and fractured media very difficult. Therefore, a robust and accurate tool, which can handle complex pore space without oversimplification or modification of the model, is needed. ’Multiphase Numerical Rock Physics’ is such a tool. In particular I worked on: 1. Effective elastic properties of gashydrates and geothermal reservoir characterization. 2. Microtremors above hydrocarbon reservoirs: Source mechanism and applications. 3. Development of static and dynamic multiphase numerical rock physics tools. All my journal publications in those areas and an actual citation overview is given at: http://www.researcherid.com/rid/A-4220-2008. During my Heisenberg-fellowship I have supervised several PhD and Master thesis. I had lectures at RU Bochum, ETH Zurich, GU Mainz and FU Berlin. I was invited, among others, to research visits in China (Wuhan) and Australia (Perth). The work performed between 2008 and 2012 was the basis of industry-financed research projects. This scholarship is the basis of my further scientific career.
Publications
- Comparison of finite difference and finite element methods for simulating two-dimensional scattering of elastic waves.
Physics of the Earth and Planetary Interiors, Vol. 171. 2008, Issues 1–4: Recent Advances in Computational Geodynamics: Theory, Numerics and Applications, pp. 112–121.
M. Frehner, S.M. Schmalholz, E. H. Saenger, H. Steeb
(See online at https://dx.doi.org/10.1016/j.pepi.2008.07.003) - A passive seismic survey over a gas field: Analysis of
low-frequency anomalies. Geophysics, Vol. 74. 2009, no. 2, pp. O29-O40.
E. H. Saenger, et al.
(See online at https://dx.doi.org/10.1190/1.3078402) - Low-frequencymicrotremor anomalies over an oil and gas field in Voitsdorf, Austria. Geophysical Prospecting, Vol. 57. 2009, Issue 3, pages 393–411.
M.-A. Lambert, S.M. Schmalholz, E. H. Saenger, B. Steiner.
(See online at https://dx.doi.org/10.1111/j.1365-2478.2008.00734.x) - Temperature-dependent poroelastic and viscoelastic effects on microscale -Modeling of seismic reflections in heavy oil reservoirs. Geophysical Journal International, Vol.176. 2009, Issue 3, pp. 822-832.
R. Ciz, E. H. Saenger, B. Gurevich, S. A. Shapiro
(See online at https://dx.doi.org/10.1111/j.1365-246X.2008.04016.x) - Elastic wave propagation in a segmented X-ray computed tomography model of a concrete specimen. Construction and Building Materials, Vol. 24. 2010, Issue 12: Special Issue on Fracture, Acoustic Emission and NDE in Concrete (KIFA-5), pp. 2393–2400.
G. K. Kocur, E. H. Saenger, T. Vogel
(See online at https://dx.doi.org/10.1016/j.conbuildmat.2010.05.013) - Application of time reverse modeling on ultrasonic non-destructive testing of concrete. Applied Mathematical Modelling, Vol. 35. 2011, Issue 2, pp. 807–816.
E. H. Saenger, G. K. Kocur, R. Jud, M. Torrilhon
(See online at https://dx.doi.org/10.1016/j.apm.2010.07.035) - Crack localization in a double-punched concrete cuboid with time reverse modeling of acoustic emission. International Journal of Fracture, Vol. 171. 2011, Issue 1, pp 1-10.
G. K. Kocur, E. H. Saenger, T. Vogel
(See online at https://dx.doi.org/10.1007/s10704-011-9621-y) - Digital rock physics: Effect of fluid iscosity on effective elastic properties. Journal of Applied Geophysics, Vol. 74. 2011, Issue 4, pp. 236–241.
E. H. Saenger, F. Enzmann, Y. Keehm, H. Steeb
(See online at https://dx.doi.org/10.1016/j.jappgeo.2011.06.001) - Spectral analysis of ambient ground-motion—Noise reduction techniques and a methodology for mapping horizontal inhomogeneity. Journal of Applied Geophysics, Vol. 74. 2011, Issues 2–3, pp. 100–113.
M.-A. Lambert, T. Nguyen, E. H. Saenger, S. M. Schmalholz
(See online at https://dx.doi.org/10.1016/j.jappgeo.2011.04.007) - Time reverse charachterization of sources in heterogeneous media. NDT & E International, Vol. 44. 2011, Issue 8, pp. 751–759.
E. H. Saenger
(See online at https://dx.doi.org/10.1016/j.ndteint.2011.07.011) - Time reverse imaging with limited s-wave velocity model information. Geophysics, Vol. 76. 2011, no. 5, pp. MA33-MA40.
B. Steiner, E. H. Saenger, S. M. Schmalholz.
(See online at https://dx.doi.org/10.1190/geo2010-0303.1) - Comparison of 2D and 3D time reverse imaging.
Computers & Geosciences, Vol. 46. 2012, pp. 174–182.
B. Steiner, E. H. Saenger
(See online at https://doi.org/10.1016/j.cageo.2011.12.005) - Digital rock physics: numerical prediction of pressure-dependent ultrasonic velocities using micro-ct imaging. Geophysical Journal International, Vol. 189. 2012, Issue 3, pp. 1475-1482.
C. Madonna, B. S. G. Almqvist, E. H. Saenger
(See online at https://doi.org/10.1111/j.1365-246X.2012.05437.x) - Pore fluid effects on Swave attenuation caused by wave-induced fluid flow. Geophysics, Vol. 77. 2012, no. 3, pp. L13-L23.
B. Quintal, H. Steeb, M. Frehner, S. Schmalholz, E. H. Saenger
(See online at https://doi.org/10.1190/GEO2011-0233.1) - Digital rock physics benchmarks - Part I: Imaging and segmentation. Computers & Geosciences, Vol. 50. 2013, pp. 25–32.
H. Andrä, et al.
(See online at https://doi.org/10.1016/j.cageo.2012.09.005) - Digital rock physics benchmarks - Part II: Computing effective properties. Computers & Geosciences, Vol. 50. 2013, pp. 33–43.
H. Andrä, et al.
(See online at https://doi.org/10.1016/j.cageo.2012.09.008) - Numerical simulation of ambient seismic wavefield modification caused by pore fluid effects in an oil reservoir. Geophysics,
vol. 78. 2013, no. 1, p. T41-T52.
M.-A. Lambert, E. H. Saenger, B. Quintal, S. M. Schmalholz
(See online at https://doi.org/10.1190/geo2011-0513.1) - Synchrotron-based x-ray tomographic microscopy for rock microstructure investigations. Geophysics, vol. 78.2013, pp. D53-D64.
C. Madonna, B. Quintal, M. Frehner, B. S. G. Almqvist, N. Tisato, M. Pistone, F. Marone, E. H. Saenger
(See online at https://doi.org/10.1190/GEO2012-0113.1)
