Tauchwellen-Tomographie für Stripping Korrekturen und geologische Interpretationen bei den reflexionsseismischen KTB-Profilen im Schwarzwald. Master Thesis (Diplomarbeit), University of Karlsruhe, Geophysical Institute. („Diving wave tomography for static corrections and geologic interpretations at the KTB 2D seismic survey line in the Black Forest“).
Near-vertical and wide-angle seismic surveys in the Black Forest, SW Germany. J. Geophys., 62: 1-30.
Near-vertical and wide-angle seismic surveys in the Schwarzwald. In R. Emmermann and J. Wohlenberg, editors, The German Continental Deeo Drilling Program (KTB), p. 297-362. Springer Verlag.
Oberpfalz deep seismic reflection survey and velocity studies. In R. Emmermann and J. Wohlenberg, editors, The German Continental Deeo DrillingProgram (KTB), p. 99-149. Springer Verlag.
Seismische Untersuchungen an der KTB-Lokation. KTB Report 89/1, DEKORP Report, p. 169-210.
Inversion of first-break traveltime data of deep seismic reflection profiles. Geophysical Prospecting, 38, 3, 247-266.
Theoretische Grundlagen und praktische Anwendungen der Diffraktions-tomographie in der Geophysik. Doctoral Thesis (Dissertation), University of Karlsruhe, Geophysical Institute. (“Theoretical foundations and practical application of diffraction tomography in geophysics”).
Evalution and interpretation of VSP-measurements in the KTB-Oberpfalz pilot borehole. Scientific Drilling, 3, 89-99.
Migration of steeply dipping reflectors at the KTB site: Depth errors caused by inaccurate velocity models. KTB Report 92-5, DEKORP Report, 333-341.
Detection of permeable fracture zones by tube waves in the KTB pilot hole. KTB Report 92-5, DEKORP Report, 309-332.
Average and interval velocities derived from first breaks of vertical seismic profiles at the KTB pilot hole. KTB Report 92-5, DEKORP Report, 201-219.
Fourier finite-difference migration. Geophysics, 59, 12, 1882-1893.
Determination of shallow refractor properties by 3D-CMP refraction seismic techniques. First Break, 13, 2, 69-77.
Fourier finite-difference migration for steeply dipping reflectors with complex overburden. Geophysical Prospecting, 43, 7, 919-938.
Frequency-space domain diffraction tomography in practical applications. Journal of Seismic Exploration, 5, 141-156.
Finite-difference migration derived from the Kirchhoff-Helmholtz integral (Short Note), Geophysics, 61, 5, 1394-1399.
3-D implicit finite-difference migration by multiway splitting. Geophysics, 62, 2, 554-567.
Optimized operators for 3-D Fourier Finite-Difference migration. Journal of Seismic Exploration, 6, 4, 367-383.
Migration of the 3-D deep-seismic reflection survey at the KTB location, Oberpfalz, Germany. Tectonophysics 271, p 135-156.
Multi-attribute Bayesian risk modification –a case study from the Norwegian Barents Sea. First Break, 35, 1, 51-58.
Thomas is owner and chief geophysicist of Amisia GeoConsultants. He studied geophysics at Karlsruhe University in Germany, where he also made his doctoral thesis (Ph.D.). From 1987-1997, Thomas worked in academia, mainly on reflection seismic inversion and migration algorithms. Since 1997, he works in the oil and gas industry at various companies. His field of expertise is seismic reservoir characterization (SRC) or Quantitative Interpretation (QI). At Amisia GeoConsultants, Thomas is responsible for all geophysical SRC projects and topics.
This paper gives the detailed derivation of the generalized Bayesian theorem, which we have to use during risk assessment of a prospect, in cases with more than one geophysical DHI (Direct Hydrocarbon Indicator) attribute. A case study was published in First Break 2017, volume 35, issue 1.
In shaly sand systems, the terms volume of shale and volume of clay, together with effective and total porosity play an important role and must be used carefully. The paper derives the formulas to compute these items from gamma ray logs, as it is done in modern rock physics software such as RokDoc. All formulas to transform quantities between the two porosity systems are given.
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