Download or read book 3C Seismic and VSP Converted waves and vector wavefield applications written by James Gaiser and published by SEG Books. This book was released on 2016-06-30 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: 3C seismic applications provide enhanced rock property characterization of the reservoir that can complement P-wave methods. Continued interest in converted P- to S-waves (PS-waves) and vertical seismic profiles (VSPs) has resulted in the steady development of advanced vector wavefield techniques. PS-wave images along with VSP data can be used to help P-wave interpretation of structure in gas obscured zones, of elastic and fluid properties for lithology discrimination from S-wave impedance and density inversion in unconventional reservoirs, and of fracture characterization and stress monitoring from S-wave birefringence (splitting) analysis. The book, which accompanies the 2016 SEG Distinguished Instructor Short Course, presents an overview of 3C seismic theory and practical application: from fundamentals of PS-waves and VSPs, through to acquisition and processing including interpretation techniques. The emphasis is on unique aspects of vector wavefields, anisotropy, and the important relationships that unify S-waves and P-waves. Various applications and case studies demonstrate image benefits from PS-waves, elastic properties and fluid discrimination from joint inversion of amplitude variations with offset/angle (AVO/A), and VSP methods for anisotropic velocity model building and improved reservoir imaging. The book will be of interest to geophysicists, geologists, and engineers, especially those involved with or considering the use of AVO/A inversion, fracture/stress characterization analyses, or interpretation in gas-obscured reservoirs.
Download or read book Multi component VSP Analysis for Applied Seismic Anisotropy written by Colin MacBeth and published by Elsevier. This book was released on 2002 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vertical seismic profile, acquired with an array of 3C receivers and either a single source or several arranged in a multi-component configuration, provides an ideal high fidelity calibration tool for seismic projects involved in the application of seismic anisotropy. This book catalogues the majority of specialized tools necessary to work with P-P, P-S and S-S data from such VSP surveys at the acquisition design, processing and interpretation stages. In particular, it discusses 3C, 4C, 6C and 9C VSP, marine and land surveys with near and multiple offsets (walkways), azimuths (walkarounds) or a combination of both. These are considered for TIH or TIV flavours of seismic anisotropy arising from cracks, fractures, sedimentary layering, and shales. The anisotropic adaptation of familiar seismic methods for velocity analysis and inversion, reflected amplitude interpretation, are given together with more multi-component specific algorithms based upon the principles dictated by the vector convolutional model. Thus, multi-component methods are described that provide tests and compensation for source or receiver vector fidelity, tool rotation correction, layer stripping, near-surface correction, wavefield separation, and the Alford rotation with its variants. The work will be of interest to geophysicists involved in research or the application of seismic anisotropy using multi-component seismic.
Download or read book Borehole Seismic Surveying 3C 3D VSP and Land Vertical Cable Analysis written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Practical Use of Vertical Seismic Profiles written by Bob Adrian Hardage and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parsimonious Migration 3 C 3 D VSP Migration written by Yogesh Agnihotri and published by . This book was released on 2006 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional Kirchoff migration can be made much faster by a priori calculation of ray incident directions, so rays are traced back only along the measured directions rather than in all possible directions. This implementation is known as parsimonious Kirchoff migration. For surface seismic data, the ray incident direction is measured by calculating the horizontal slowness components (or ray parameters) in the inline and crossline directions. However, this implementation does not work for vertical seismic profile (VSP) data, which has only a single vertical line of receivers, so the horizontal slownesses cannot be measured. We overcome this limitation for calculating incident directions from three-component VSP data by polarization analysis of the incident waves. Dip and azimuth angles of the waves are calculated at the receivers by estimating the data covariance matrix within a time window. For P-waves, the data covariance matrix defines the polarization ellipsoid which is then used to calculate the incident angles; for S-waves, an additional step is required because the polarization is orthogonal to the incident direction. For migration we perform ray tracing only along the measured incident directions, which eliminates the traveltime table calculation and reduces the total number of rays being traced. This enhances the efficiency of Kirchhoff migration of three-component VSP data.
Download or read book Advances in Geophysics written by Cedric Schmelzbach and published by Academic Press. This book was released on 2018-11-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Geophysics is a highly-respected publication in the field of geophysics. Since 1952, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with over 50 volumes, the series contains much material still relevant today – truly an essential publication for researchers in all fields of geophysics. Provides high-level reviews of the latest innovations in geophysics Written by recognized experts in the field Presents an essential publication for researchers in all fields of geophysics
Download or read book Advances and applications of artificial intelligence and numerical simulation in risk emergency management and treatment written by Yunhui Zhang and published by Frontiers Media SA. This book was released on 2023-07-24 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Well Seismic Surveying written by Jean-Luc Mari and published by Editions TECHNIP. This book was released on 2003 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: CD-ROM is extracted from the Reservoir and Civil Engineering Geophysics.
Download or read book 3D 3C Seismic Imaging in the Athabasca Basin Canada written by Dong Shi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the 3C-3D surface and downhole (VSP) seismic datasets previously collected at the Athabasca Basin McArthur River to Millennium uranium mine sites using a number of unconventional analytical methods. The objective is to understand the potential of the seismic method to delineate subsurface features such as the hydrothermal alteration footprint, the sandstone-basement unconformity and the subvertical thrust fault zone. Methodologies applied include a series of forward and data-driven approaches. First, this study accomplishes the prediction of the compressional and shear wave amplitude and traveltime using angle dependent reflectivity equations and 2D elastic finite-difference waveform models. The numerical predictions are based on the existing and estimated petrophysical data from the local area. Second, this study discovers a number of unique properties of the seismic wave attenuation from surface and downhole seismic datasets. Multiple methods applied to VSP datasets confirm that the attenuation quality factor (Q) in the study area is low and variable. Finally, this study analyzes the traveltime and waveform data collected from the unique 3C-3D-borehole seismic geometry at Millennium to delineate the subsurface geologic structures that are potentially related to the wave attenuation and velocity. A forward 3D visco-elastic waveform model is created to illustrate the observed abnormal amplitude and velocity azimuthal variations with a superimposed effect of intrinsic and scattering. The results from these series of approaches provide updated understandings of the alterations, structural geology, and their relationships with seismic data. These understandings contribute to the suggestions for future seismic imaging work such as converted shear wave processing, downhole seismic acquisition, and alteration footprint tomography.
Download or read book Hydrogeophysics written by Yorum Rubin and published by Springer Science & Business Media. This book was released on 2006-05-06 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ground-breaking work is the first to cover the fundamentals of hydrogeophysics from both the hydrogeological and geophysical perspectives. Authored by leading experts and expert groups, the book starts out by explaining the fundamentals of hydrological characterization, with focus on hydrological data acquisition and measurement analysis as well as geostatistical approaches. The fundamentals of geophysical characterization are then at length, including the geophysical techniques that are often used for hydrogeological characterization. Unlike other books, the geophysical methods and petrophysical discussions presented here emphasize the theory, assumptions, approaches, and interpretations that are particularly important for hydrogeological applications. A series of hydrogeophysical case studies illustrate hydrogeophysical approaches for mapping hydrological units, estimation of hydrogeological parameters, and monitoring of hydrogeological processes. Finally, the book concludes with hydrogeophysical frontiers, i.e. on emerging technologies and stochastic hydrogeophysical inversion approaches.
Download or read book Geologically Storing Carbon written by Peter Cook and published by CSIRO PUBLISHING. This book was released on 2014-08-18 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon capture and geological storage (CCS) is presently the only way that we can make deep cuts in emissions from fossil fuel-based, large-scale sources of CO2 such as power stations and industrial plants. But if this technology is to be acceptable to the community, it is essential that it is credibly demonstrated by world-class scientists and engineers in an open and transparent manner at a commercially significant scale. The aim of the Otway Project was to do just this. Geologically Storing Carbon provides a detailed account of the CO2CRC Otway Project, one of the most comprehensive demonstrations of the deep geological storage or geosequestration of carbon dioxide undertaken anywhere. This book of 18 comprehensive chapters written by leading experts in the field is concerned with outstanding science, but it is not just a collection of scientific papers – it is about 'learning by doing'. For example, it explains how the project was organised, managed, funded and constructed, as well as the approach taken to community issues, regulations and approvals. It also describes how to understand the site: Are the rocks mechanically suitable? Will the CO2 leak? Is there enough storage capacity? Is monitoring effective? This is the book for geologists, engineers, regulators, project developers, industry, communities or anyone who wants to better understand how a carbon storage project really 'works'. It is also for people concerned with obtaining an in-depth appreciation of one of the key technology options for decreasing greenhouse emissions to the atmosphere.
Download or read book Geophysics and Geosequestration written by Thomas L. Davis and published by Cambridge University Press. This book was released on 2019-05-09 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the geophysical techniques and analysis methods for monitoring subsurface carbon dioxide storage for researchers and industry practitioners.
Download or read book Active Geophysical Monitoring written by Hitoshi Mikada and published by Elsevier. This book was released on 2019-10-05 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active Geophysical Monitoring, Second Edition, presents a key method for studying time-evolving structures and states in the tectonically active Earth's lithosphere. Based on repeated time-lapse observations and interpretation of rock-induced changes in geophysical fields periodically excited by controlled sources, active geophysical monitoring can be applied to a variety of fields in geophysics, from exploration, to seismology and disaster mitigation. This revised edition presents the results of strategic systematic development and the application of new technologies. It demonstrates the impact of active monitoring on solid Earth geophysics, also delving into key topics, such as carbon capture and storage, geodesy, and new technological tools. This book is an essential for graduate students, researchers and practitioners across geophysics. Outlines the general concepts of active geophysical monitoring with powerful seismic vibrators and MHD generators Provides historical background for previous studies of seismically active zones Covers the theory and technology of active monitoring, including signal processing, data analysis, novel approaches to numerical modeling, and interpretation Discusses case histories and presents the results of worldwide, regional active monitoring experiments Thoroughly updated to include recent developments, such as updates relating to carbon capture and storage, microgravity, InSAR technologies, geodesy, reservoir monitoring, seismic reflection, and more
Download or read book Reverse VSP and Crosswell Seismic Imaging at the Savannah River Site written by and published by . This book was released on 1996 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of crosswell and three-component seismic data integrated with well logs have produced information on the distribution of subsurface heterogeneities below the In-Tank Precipitation facility at the Savannah River Site (SRS). The travel time P-wave tomogram and reflection imaging delineate lateral and vertical structural details of the formations. In particular, the high-resolution P-wave tomogram captures a low-velocity zone within the carbonates. This zone is surrounded by reflection events between depths of 150 and 200 ft. in the reflection imaging. The reflections are caused by the acoustic impedance contrast between the low velocity zone of 'soupy' sand mixtures of unconsolidated materials and the more rigid and dense competent surrounded medium. The time-frequency analysis of full waveforms particle velocity identifies guided waves in form of leaky and normal modes at the depths of about 138 to 150 ft. This resulting change in lithology associated with the presence of guided waves is consistent with a velocity low observed in the vertical velocity profile determined from the inversion of three-component seismic data. This low-velocity zone intercepted by the wells H-BOR-34 and H-BOR-50 correlates with the conductive Griffins Landing Member, which is located above the carbonates. The result of the experiments demonstrate that the present high-resolution crosswell seismic measurement technique (using frequencies up to 1500 Hz) meets the resolution requirements to map geological and geotechnical targets in the vicinity of the In-Tank Precipitation facility at the Savannah River Site.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planning Land 3 D Seismic Surveys written by Andreas Cordsen and published by SEG Books. This book was released on 2000 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Seismic Velocity Model as an Interpretation Asset written by Phil Schultz and published by SEG Books. This book was released on 1998-12-30 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 3D velocity model is built with a both geophysical and geologic input because of the accuracy demands of depth imaging, so it becomes an increasingly effective interpretive tool. This book addresses ways in which the interpreter should participate in development of the model and underscores its interpretive value with case study examples.
