A seismic reflection imaging workflow based on the - PowerPoint PPT Presentation

74 th Annual Meeting SEG, Denver 2004 Hertweck et al. A seismic reflection imaging workflow based on the Common-Reflection-Surface (CRS) stack: Introduction Seismic imaging CRS stack theoretical background and case study Applications Synthesis The project T. Hertweck 1 C. Jäger J. Mann* Project definition E. Duveneck 2 Data acquisition Z. Heilmann Data example CRS stack 1 now: Fugro-Robertson Ltd, Swanley, UK Inversion 2 now: SINTEF Petroleum Research, Trondheim, Norway PostSDM PreSDM CIG Interpretation Wave Inversion Technology (WIT) Consortium Geophysical Institute, University of Karlsruhe (TH) Comparison Conclusions Acknowledgments October 14, 2004 W I T

74 th Annual Meeting Overview SEG, Denver 2004 Hertweck et al. Introduction Seismic imaging Introduction CRS stack Applications Synthesis The project The project Project definition Data acquisition Data example Data example CRS stack Inversion PostSDM PreSDM Comparison CIG Interpretation Comparison Conclusions Conclusions Acknowledgments Acknowledgments W I T

74 th Annual Meeting Seismic imaging SEG, Denver 2004 Hertweck et al. Introduction Acquisition & Preprocessing Seismic imaging CRS stack Applications Time Conventional Processing Data−driven Processing Synthesis e.g. NMO/DMO etc. e.g. ZO CRS stack The project Project definition Data acquisition Prestack/Poststack time migration Data example CRS stack Kinematic wavefield Inversion (CRS) attributes PostSDM PreSDM Estimation of macro model CIG Interpretation Depth Velocity updating Comparison Poststack depth Prestack depth Conclusions migration migration Acknowledgments Structural Imaging & Further Analysis yellow = tools developed at Karlsruhe University W I T

74 th Annual Meeting Seismic imaging SEG, Denver 2004 Hertweck et al. Introduction Acquisition & Preprocessing Seismic imaging CRS stack Applications Time Conventional Processing Data−driven Processing Synthesis e.g. NMO/DMO etc. e.g. ZO CRS stack The project Project definition Data acquisition Prestack/Poststack time migration Data example CRS stack Kinematic wavefield Inversion (CRS) attributes PostSDM PreSDM Estimation of macro model CIG Interpretation Depth Velocity updating Comparison Poststack depth Prestack depth Conclusions migration migration Acknowledgments Structural Imaging & Further Analysis yellow = tools developed at Karlsruhe University W I T

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis ◮ Additional output: variety of kinematic wavefield The project Project definition attributes (so-called CRS attributes) Data acquisition ◮ Principle: generalized, high-density, multiparameter, Data example CRS stack multidimensional stacking velocity analysis tool Inversion PostSDM ◮ Automated coherence-based application PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis ◮ Additional output: variety of kinematic wavefield The project Project definition attributes (so-called CRS attributes) Data acquisition ◮ Principle: generalized, high-density, multiparameter, Data example CRS stack multidimensional stacking velocity analysis tool Inversion PostSDM ◮ Automated coherence-based application PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis The project Project definition Data acquisition Data example CRS stack Inversion PostSDM PreSDM CIG Interpretation (from Müller, "The Common Reflection Surface Stack Method", 1999) Comparison ◮ Additional output: variety of kinematic wavefield Conclusions Acknowledgments attributes (so-called CRS attributes) ◮ Principle: generalized, high-density, multiparameter, multidimensional stacking velocity analysis tool W I T ◮ Automated coherence-based application

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis ◮ Additional output: variety of kinematic wavefield The project Project definition attributes (so-called CRS attributes) Data acquisition ◮ Principle: generalized, high-density, multiparameter, Data example CRS stack multidimensional stacking velocity analysis tool Inversion PostSDM ◮ Automated coherence-based application PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis ◮ Additional output: variety of kinematic wavefield The project Project definition attributes (so-called CRS attributes) Data acquisition ◮ Principle: generalized, high-density, multiparameter, Data example CRS stack multidimensional stacking velocity analysis tool Inversion PostSDM ◮ Automated coherence-based application PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Common-Reflection-Surface stack SEG, Denver 2004 Hertweck et al. ◮ Alternative to standard NMO/DMO/stack approach Introduction ◮ Output: zero-offset section (2D) or volume (3D) of Seismic imaging CRS stack high S/N ratio Applications Synthesis ◮ Additional output: variety of kinematic wavefield The project Project definition attributes (so-called CRS attributes) Data acquisition ◮ Principle: generalized, high-density, multiparameter, Data example CRS stack multidimensional stacking velocity analysis tool Inversion PostSDM ◮ Automated coherence-based application PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Basic concepts SEG, Denver 2004 Hertweck et al. ◮ second-order approximation of reflection events Introduction ◮ spatial stacking operator Seismic imaging CRS stack ◮ limited number of stacking parameters: Applications Synthesis first and second spatial derivatives of traveltime The project Project definition ◮ geometrical interpretation: Data acquisition propagation direction and curvatures of hypothetical Data example CRS stack wavefronts Inversion PostSDM PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Basic concepts SEG, Denver 2004 Hertweck et al. ◮ second-order approximation of reflection events Introduction ◮ spatial stacking operator Seismic imaging CRS stack ◮ limited number of stacking parameters: Applications Synthesis first and second spatial derivatives of traveltime The project Project definition ◮ geometrical interpretation: Data acquisition propagation direction and curvatures of hypothetical Data example CRS stack wavefronts Inversion PostSDM PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Basic concepts SEG, Denver 2004 Hertweck et al. ◮ second-order approximation of reflection events Introduction ◮ spatial stacking operator Seismic imaging CRS stack ◮ limited number of stacking parameters: Applications Synthesis first and second spatial derivatives of traveltime The project Project definition ◮ geometrical interpretation: Data acquisition propagation direction and curvatures of hypothetical Data example CRS stack wavefronts Inversion PostSDM PreSDM CIG Interpretation Comparison Conclusions Acknowledgments W I T

74 th Annual Meeting Basic concepts SEG, Denver 2004 Hertweck et al. ◮ second-order approximation of reflection events Introduction ◮ spatial stacking operator Seismic imaging CRS stack ◮ limited number of stacking parameters: Applications Synthesis first and second spatial derivatives of traveltime The project Project definition ◮ geometrical interpretation: Data acquisition propagation direction and curvatures of hypothetical Data example CRS stack wavefronts Inversion PostSDM PreSDM R N R NIP CIG x 0 S G Interpretation 0 v Comparison 0 Depth [km] Conclusions α v 1 Acknowledgments –1 W I T 1 2 3 Distance [km]