Understanding Seismic Anisotropy in Exploration and Exploitation

Understanding Seismic Anisotropy in Exploration and Exploitation PDF Author: Leon Thomsen
Publisher: SEG Books
ISBN: 1560801123
Category : Nature
Languages : en
Pages : 248

Get Book Here

Book Description
All rock masses are seismically anisotropic, but we generally ignore this in our seismic acquisition, processing, and interpretation. The anisotropy nonetheless does affect our data, in ways that limit the effectiveness with which we can use it, as long as we ignore it. This book, produced for use with the fifth SEG/EAGE Distinguished Instructor Short Course, helps us understand why this inconsistency between reality and practice has been so successful in the past and why it will be less successful in the future as we acquire better seismic data (especially including vector seismic data) and correspondingly higher expectations of it. This book helps us understand how we can modify our practice to more fully realize the potential inherent in our data through algorithms which recognize the fact of seismic anisotropy.

Understanding Seismic Anisotropy in Exploration and Exploitation

Understanding Seismic Anisotropy in Exploration and Exploitation PDF Author: Leon Thomsen
Publisher: SEG Books
ISBN: 1560801123
Category : Nature
Languages : en
Pages : 248

Get Book Here

Book Description
All rock masses are seismically anisotropic, but we generally ignore this in our seismic acquisition, processing, and interpretation. The anisotropy nonetheless does affect our data, in ways that limit the effectiveness with which we can use it, as long as we ignore it. This book, produced for use with the fifth SEG/EAGE Distinguished Instructor Short Course, helps us understand why this inconsistency between reality and practice has been so successful in the past and why it will be less successful in the future as we acquire better seismic data (especially including vector seismic data) and correspondingly higher expectations of it. This book helps us understand how we can modify our practice to more fully realize the potential inherent in our data through algorithms which recognize the fact of seismic anisotropy.

Understanding Seismic Anisotropy in Exploration and Exploitation, Second Edition

Understanding Seismic Anisotropy in Exploration and Exploitation, Second Edition PDF Author: Leon Thomsen
Publisher: SEG Books
ISBN: 1560803266
Category : Science
Languages : en
Pages : 305

Get Book Here

Book Description
Understanding Seismic Anisotropy in Exploration and Exploitation (second edition) by Leon Thomsen is designed to show you how to recognize the effects of anisotropy in your data and to provide you with the intuitive concepts that you will need to analyze it. Since its original publication in 2002, seismic anisotropy has become a mainstream topic in exploration geophysics. With the emergence of the shale resource play, the issues of seismic anisotropy have become central, because all shales are seismically anisotropic, whether fractured or not. With the advent of wide-azimuth surveying, it has become apparent that most rocks are azimuthally anisotropic, with P-wave velocities and P-AVO gradients varying with source-receiver azimuth. What this means is that analysis of such data with narrow-azimuth algorithms and concepts will necessarily fail to get the most out of this expensively acquired data. The issues include not only seismic wave propagation, but also seismic rock physics. Isotropic concepts including velocity, Young’s modulus, and Poisson’s ratio have no place in the discussion of anisotropic rocks, unless qualified in some directional way (e.g., vertical Young’s modulus). Likewise, fluid substitution in anisotropic rocks, using the isotropic Biot/Gassmann formula, leads to formal errors, because the bulk modulus does not appear, in a natural way, within the anisotropic P-wave velocity. This updated edition is now current as of 2014.

Understanding Seismic Anisotropy in Exploration and Exploitation

Understanding Seismic Anisotropy in Exploration and Exploitation PDF Author: Leon Thomsen
Publisher:
ISBN: 9781560800866
Category :
Languages : en
Pages :

Get Book Here

Book Description


Geostatistics for Seismic Data Integration in Earth Models

Geostatistics for Seismic Data Integration in Earth Models PDF Author: Olivier Dubrule
Publisher: SEG Books
ISBN: 1560801212
Category : Science
Languages : en
Pages : 282

Get Book Here

Book Description
Geostatistics is used not only in reservoir characterization but also in velocity analysis, time-to-depth conversion, seismic inversion, uncertainty quantification, and data integration in earth models. This book includes covariance and the variogram, interpolation, heterogeneity modelling, uncertainty quantification, and geostatistical inversion.

3C Seismic and VSP: Converted waves and vector wavefield applications

3C Seismic and VSP: Converted waves and vector wavefield applications PDF Author: James Gaiser
Publisher: SEG Books
ISBN: 1560803355
Category : Science
Languages : en
Pages : 637

Get Book Here

Book Description
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.

Reservoir Geophysics

Reservoir Geophysics PDF Author: William L. Abriel
Publisher: SEG Books
ISBN: 1560801468
Category : Science
Languages : en
Pages : 137

Get Book Here

Book Description
Describes the main business drivers of the operator and how seismic data help address subsurface uncertainties. This volume discusses delineation, development, production, and geophysics applications in heavy-oil and carbonate reservoirs, and includes problems based on actual projects. Illustrations contain examples that focus on business value.

Concepts and Applications in 3D Seismic Imaging

Concepts and Applications in 3D Seismic Imaging PDF Author: Biondo Biondi
Publisher: SEG Books
ISBN: 1560801395
Category : Computers
Languages : en
Pages : 265

Get Book Here

Book Description
Providing a broad and intuitive understanding of seismic-imaging concepts and methods to enable geoscientists to make appropriate decisions during acquisition, processing, imaging, and interpretation, this book shows trends in imaging research and encourages the adoption of new technologies to facilitate the optimal use of these images.

Prestack Depth Migration and Velocity Model Building

Prestack Depth Migration and Velocity Model Building PDF Author: Ian Frederick Jones
Publisher: SEG Books
ISBN: 1560801476
Category : Science
Languages : en
Pages : 1427

Get Book Here

Book Description
Compilation of material published 1983-2004.

Microseismic Monitoring

Microseismic Monitoring PDF Author: Vladimir Grechka
Publisher: SEG Books
ISBN: 1560803479
Category : Science
Languages : en
Pages : 471

Get Book Here

Book Description
Over the past decade, microseismic monitoring, a technology developed for evaluating completions of wells drilled to produce hydrocarbons from unconventional reservoirs, has grown increasingly popular among oil and gas companies. Microseismic Monitoring, by Vladimir Grechka and Werner M. Heigl, discusses how to process microseismic data, what can and cannot be inferred from such data, and to what level of certainty this might be possible. The narrative of the book follows the passage of seismic waves: from a source triggered by hydraulic fracture stimulation, through hydrocarbon-bearing formations, towards motion sensors. The waves’ characteristics encode the location of their source and its focal mechanism. The analysis of various approaches to harvesting the source-related information from microseismic records has singled out the accuracy of the velocity model, fully accounting for the strong elastic anisotropy of hydraulically fractured shales, as the most critical ingredient for obtaining precise source locations and interpretable moment tensors. The ray theory complemented by its modern extensions, paraxial and Fréchet ray tracing, provides the only practical means available today for building such models. The book is written for geophysicists interested in learning and applying advanced microseismic data-processing techniques.

Petroleum Systems of Deepwater Settings

Petroleum Systems of Deepwater Settings PDF Author: Paul Weimer
Publisher: SEG Books
ISBN: 1560801247
Category : Nature
Languages : en
Pages : 489

Get Book Here

Book Description