Download or read book Practical Imaging of Complex Geological Structures Using Seismic Prestack Depth Migration written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Imaging of Complex Geological Structures Using Seismic Prestack Depth Migration written by Jinming Zhu and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Depth Imaging of Foothills Seismic Data written by Canadian Society of Exploration Geophysicists and published by [Calgary] : Canadian Society of Exploration Geophysicists. This book was released on 1999 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing exploration problems in complex overthrust environments and then developing practical solutions in terms of migration methods and applications, this book conveys heuristic descriptions of mathematical algorithms and provides case history applications from overthrust belts. Examples derived from model and real data sets are provided. This book evolved from a project of the Canadian Society of Exploration Geophysicists Superfund, a fund designed to support exploration geophysics research at Canadian universities. The project's purpose was to study the seismic depth imaging of complex geologic structures in the Canadian Foothills. This book is intended for seismic processors, interpreters, and researchers. It begins with a description of exploration problems in complex overthrust environments and then develops practical solutions in terms of migration methods and applications. The book conveys heuristic descriptions of mathematical algorithms and provides case-history applications from overthrust belts. In addition to conventional poststack and prestack depth-migration approaches, the book examines migration from topography and anisotropic migration methods while providing examples derived from model and real data sets. Because of the increasing interest in Foothills oil and gas exploration, the book should provide valuable information for practitioner and theoretician alike.
Download or read book Model based Depth Imaging written by Stuart Fagin and published by SEG Books. This book was released on 1998 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an informal review of the principle techniques and issues associated with prestack depth imaging. The intended audience for this book would be those seismic interpreters, processors, managers, and explorationists who require basic familiarity with the technology that has so greatly expanded the range of geologic structures that can be successfully imaged. The emphasis of the book is on velocity-model building techniques that are the key to successful depth imaging.
Download or read book 3D Seismic Imaging written by Biondo Biondi and published by SEG Books. This book was released on 2006 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying CD-ROM includes PDF slides for teaching the material in the book and the C3-narrow-azimuth classic data set.
Download or read book Model based Depth Imaging written by Stuart William Fagin and published by . This book was released on 1998 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an informal review of the principle techniques and issues associated with prestack depth imaging. The intended audience for this book would be those seismic interpreters, processors, managers, and explorationists who require basic familiarity with the technology that has so greatly expanded the range of geologic structures that can be successfully imaged. The emphasis of the book is on velocity-model building techniques that are the key to successful depth imaging.
Download or read book Seismic Imaging Using 2 D Prestack Depth Migration at Badger Basin Field Park County Wyoming written by Ekaterini Papakonstantinou and published by . This book was released on 1998 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prestack Depth Migration and Velocity Model Building written by and published by . This book was released on 2008 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together works published since the early 1980s, striking a balance between algorithm development and estimation of subsurface velocity and anisotropy parameters. In that time span, a radical change has occurred in the way seismic processing has delivered a subsurface image. The traditional purely compartmentalized approach has been superseded by a multidisciplinary collaborative workflow to build iteratively a subsurface velocity model suitable for detailed and quantitative imaging. Jones et al. emphasize works that have had the most practical industrial application rather than assessing all approaches equally. Hence, the bias is away from R & D and toward industrial practice. Because of the distribution of papers in this reprint edition, split between migration algorithm and velocity estimation techniques, this volume will appeal to processing specialists and interpretation geoscientists alike.
Download or read book Practical Geophysical Technology and Application for Lithological Reservoirs written by Huandi Wang and published by Springer Nature. This book was released on 2021-07-30 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces new geological analysis and geophysical methods and techniques for lithological reservoir exploration. It puts forward a set of practical geophysical methods and techniques aimed at lithological reservoirs in China. From a practical point of view, the book systematically analyses geophysical methods and technique principles, applied steps, key problems and caution notes in lithological exploration. The lessons of the book are demonstrated with a case study of the Songliao Basin, which has a large area with a low density of lithological reservoirs, indicating the methods and techniques that can identify lithological reservoirs. It is unique in its fusion of theory, method and technology and practice.
Download or read book High Resolution High Fidelity Seismic Imaging and Parameter Estimation for Geological Structure and Material Characterization written by Xiao-Bi Xie Ru-Shan Wu (Thorne Lay) and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, we develop new theories and methods for multi-domain one-way wave-equation based propagators, and apply these techniques to seismic modeling, seismic imaging, seismic illumination and model parameter estimation in 3D complex environments. The major progress of this project includes: (1) The development of the dual-domain wave propagators. We continue to improve the one-way wave-equation based propagators. Our target is making propagators capable of handling more realistic velocity models. A wide-angle propagator for transversely isotropic media with vertically symmetric axis (VTI) has been developed for P-wave modeling and imaging. The resulting propagator is accurate for large velocity perturbations and wide propagation angles. The thin-slab propagator for one-way elastic-wave propagation is further improved. With the introduction of complex velocities, the quality factors Qp and Qs have been incorporated into the thin-slab propagator. The resulting viscoelastic thin-slab propagator can handle elastic-wave propagation in models with intrinsic attenuations. We apply this method to complex models for AVO modeling, random media characterization and frequency-dependent reflectivity simulation. (2) Exploring the Information in the Local Angle Domain. Traditionally, the local angle information can only be extracted using the ray-based method. We develop a wave-equation based technique to process the local angle domain information. The approach can avoid the singularity problem usually linked to the high-frequency asymptotic method. We successfully apply this technique to seismic illumination and the resulting method provides a practical tool for three-dimensional full-volume illumination analysis in complex structures. The directional illumination also provides information for angle-domain imaging corrections. (3) Elastic-Wave Imaging. We develop a multicomponent elastic migration method. The application of the multicomponent one-way elastic propagator and the wide-angle correction preserve more dynamic information carried by the elastic waves. The vector imaging condition solves the polarization problem of converted wave imaging. Both P-P and P-S images can be calculated. We also use converted waves to improve the image of steep sub-salt structures. The synthetic data for the SEG/EAGE salt model are migrated with a generalized screen algorithm and for the converted PSS-wave path. All the sub-salt faults are properly imaged.
Download or read book Land Seismic Case Studies for Near Surface Modeling and Subsurface Imaging written by Öz Yilmaz and published by SEG Books. This book was released on 2021-06-30 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for practicing geophysicists, “Land Seismic Case Studies for Near-Surface Modeling and Subsurface Imaging” is a comprehensive guide to understanding and interpreting seismic data. The culmination of land seismic data acquisition and processing projects conducted by the author over the last two decades, this book contains more than nearly 800 figures from worldwide case studies—conducted in both 2D and 3D. Beginning with Chapter 1 on seismic characterization of the near-surface, Chapter 2 presents near-surface modeling by traveltime and full-wave inversion, Chapter 3 presents near-surface modeling by imaging, and then Chapter 4 includes detailed case studies for near-surface modeling. Chapter 5 reviews single- and multichannel signal processing of land seismic data with the key objective of removing surface waves and guided waves that are characterized as coherent linear noise. Uncommon seismic data acquisition methods, including large-offset acquisition in thrust belts to capture the large-amplitude supercritical reflections, swath-line acquisition, and joint PP and SH- SH seismic imaging are highlighted in Chapter 6, and Chapter 7 presents image-based rms velocity estimation and discusses the problem of velocity uncertainty. The final two chapters focus exclusively on case studies: 2D in Chapter 8 and 3D in Chapter 9. An outstanding teaching tool, this book includes analysis workflows containing processing steps designed to solve specific problems. Essential for anyone involved in acquisition, processing, and inversion of seismic data, this volume will become the definitive reference for understanding how the variables in seismic acquisition are directly reflected in the data.
Download or read book Andean Structural Styles written by Gonzalo Zamora and published by Elsevier. This book was released on 2022-04-26 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Andean Structural Styles: A Seismic Atlas is a comprehensive reference illustrating the variability in structural styles and hydrocarbon traps that exist in the Andean chain. The Andean chain, stretching over more than 5,000 km (3,000 mi) from Venezuela to Argentina, contains a large number of sedimentary basins which have developed in a wide range of tectonic settings. Some of these basins are highly mature, with hydrocarbon production from Paleozoic, Mesozoic, and Cenozoic sedimentary sequences, while others are still underexplored. Andean Structural Styles: A Seismic Atlas covers topics including fold types, thrust faults, triangle zones, inversion structures, synorogenic deposits, and growth stratal geometries. These topics are illustrated by thirty-two seismic examples interpreted and uninterpreted, covering most of the Andean basins, and five chapters reviewing the structural styles of the Andes, the complexity of processing seismic in these settings, how analogue models help in the interpretation, and several outcrop analogues. This reference is invaluable to both hydrocarbon exploration of the Andes and researchers and students in the fields of exploration geology and structural geology. Also, those teaching structural geology and seismic interpretation will find a valuable resource with lots of uninterpreted seismic examples that can be used in their lectures. Includes a vast collection of high-quality, color images Features case studies covering the entirety of the Andes Mountain chain Presents high-quality seismic data that was previously only available to oil companies
Download or read book Hardrock Seismic Exploration written by David W. Eaton and published by SEG Books. This book was released on 2003 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: With case histories and chapters on principles of acquisition, processing, modelling, and interpretation, this book is invaluable for seismic exploration of hardrock terranes. Balancing tutorial, review, application, and future research directions, it is useful for researchers, geophysicists, geotechnical engineers, and seismic processors.
Download or read book Methodologies and Applications of Prestack Waveform Inversion Reverse Time Migration and Artificial Intelligence in Seismic Exploration written by Lingxiao Jia and published by . This book was released on 2021 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seismic migration and inversion describe a class of closely related processes sharing common objectives and underlying physical principles. Reverse time migration (RTM) is a migration method that can provide high quality images for structures with steep dips and strong horizontal velocity variations. Prestack waveform inversion (PWI) is an inversion method that is a practical choice for subsurface reservoir description using the current computational resources. Although RTM and PWI provide a depth image and subsurface properties, interpreting subsurface structures from the seismic images can be challenging, especially when the geology is complex. Use of automated methods using the artificial intelligence (AI) recently became popular for interpreting such complex geology. This dissertation focuses on the applications of PWI, RTM, and AI for interpreting seismic data using three proposed methods. The first method is a new methodology and workflow for a nonlinear prestack isotropic elastic waveform inversion, which we call data driven inversion, meaning that we derive the initial model entirely from the seismic data without using any well information. The second method is a joint iterative workflow that combines RTM and PWI, where PWI is run on the common image gathers (CIGs) obtained from RTM, followed by another pass of RTM, taking the updated models from PWI as input. This method allows for automatic model updates to improve the accuracy of both depth image and subsurface elastic model. The third method is an AI based semi-supervised training workflow for salt recognition, which allows the predicted model to iteratively improve as more and more information is distilled from the unlabeled data into the model. For each iteration, the model obtained from previous iteration is used for generating pseudo labels for the unlabeled data. This automated consecutive data distillation allows the model prediction to improve with iteration, without any need for human intervention. All these methods were validated using synthetic data and then applied to real datasets.
Download or read book On the Determination and Use of Kinematic Wavefield Attributes for 3D Seismic Imaging written by Steffen Bergler and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades a lot of effort has been directed towards methods that have the potential to succeed in imaging complex 3D subsurface structures from multi-coverage seismic data. The necessity of an estimate for the wave propagation velocities, required for transforming the data from the time domain to the depth domain, poses one of the fundamental problems in seismic imaging. Inadequate velocity models distort the final depth image. So-called data-oriented approaches are a class of imaging methods that avoid the explicit parameterisation of a velocity model in the first imaging steps. Instead, the data-oriented approaches parameterise the reflection events in the time domain and try to obtain as much information as possible from the measured data. The extracted information is then used to transform the seismic data into depth. The common-reflection-surface (CRS) stack is one of the data-oriented imaging approaches. This method makes use of second-order traveltime approximations in order to describe seismic reflection events in the time domain. For the processing of data from a 3D acquisition, the traveltime equations can be used as stacking operators to simulate a zero-offset (ZO) volume of high accuracy and high signal-to-noise ratio from multi-coverage prestack data. During the stack, reflection energy from the entire five-dimensional data hyper-volume enters into the construction of one ZO sample. The eight parameters, which express the traveltime approximation for the ZO case, relate to kinematic wavefield attributes. These locally describe the propagation directions and curvatures of specific wavefronts at the Earth's surface which have travelled through the subsurface. Thus, the kinematic wavefield attributes constitute integral quantities of the medium's parameters and are suitable to estimate the properties of the Earth's interior. The accurate determination of the wavefield attributes is, therefore, a crucial step in the CRS processing. In this thesis the derivation of the traveltime approximations is presented. The kinematic wavefield attributes are introduced by means of concepts known from geometrical optics. The determination of the eight kinematic wavefield attributes for the ZO case from 3D multi-coverage seismic data is elaborated. The applications of the attributes to support and facilitate 3D seismic imaging are discussed. In this context emphasis is put on the utilisation of the kinematic wavefield attributes for the 3D CRS stack. The proposed search algorithms are validated on a synthetic data example and have shown to be successful. Finally, the 3D CRS stack is applied to a real marine dataset. In this way the functionality of the search algorithms on complex data is verified. Moreover, the imaging quality of the 3D CRS stack is checked by migrating the simulated ZO volume to depth and comparing the obtained result with the result from a prestack depth migration. The comparison shows that the CRS based result is competitive to the result of the prestack depth migration. Thus, CRS based imaging is an alternative to prestack depth migration due to the good imaging quality and also due to the provided information in form of the kinematic wavefield attributes.
Download or read book A Practical Guide to Seismic Reservoir Characterization written by Timothy Tylor-Jones and published by Springer Nature. This book was released on 2023-01-11 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers in detail the entire workflow for quantitative seismic interpretation of subsurface modeling and characterization. It focusses on each step of the geo-modeling workflow starting from data preconditioning and wavelet extraction, which is the basis for the reservoir geophysics described and introduced in the following chapters. This book allows the reader to get a comprehensive insight of the most common and advanced workflows. It aims at graduate students related to energy (hydrocarbons), CO2 geological storage, and near surface characterization as well as professionals in these industries. The reader benefits from the strong and coherent theoretical background of the book, which is accompanied with real case examples.
Download or read book Geophysical Exploration Technology And Practice Foreland Thrust Belt In Central And Western China written by Wei Zhang and published by World Scientific. This book was released on 2023-11-21 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compendium summarizes the seismic exploration history, geophysical exploration technology progress, application and exploration results of foreland basins and foreland thrust belts in central and western China.The volume highlights the latest progress and exploration results of theories and methods in foreland thrust belts such as Kuqa in Tarim basin, Yingxiongling in Qaidam basin and Longmenshan in Sichuan basin. The technologies presented, such as wide azimuth and high-density 3D seismic acquisition and processing technology, anisotropic depth domain seismic processing technology, theoretical multi-information comprehensive structural modeling technology, multi-dimensional data fracture detection technology, etc, are widely used in complex areas such as foreland thrust belt.This highly illustrated and readable reference text benefits professionals, researchers, teachers and graduate students majoring in oil and gas exploration and development.
