Seismic While Drilling: Fundamentals of Drill-Bit Seismic for Exploration, 2nd edition, revised and extended gives a theoretical and practical introduction to seismic while drilling by using drill-bit noise. While drilling seismic methods using surface sources and downhole receivers are also analysed. The goal is to support the exploration geology with geophysical control of drilling, and to build a bridge between geophysicists involved in seismic while drilling, drillers and exploration geologists. This revised and extended edition includes new topics such as novel drilling technology, downhole communication, ground-force drill-bit measurement, SWD seismic interferometry, and fiber optic (DAS). A new section is dedicated to well placement and geosteering. Like the first edition, Seismic While Drilling, 2nd edition also includes examples of SWD analysis and application on real data. - Addresses fundamental knowledge on geophysical principles related to acoustics and seismic waves as well as basic borehole waves and drilling - Includes new technological and methodological developments since the publication of the first edition - Provides new examples for applications in geothermal and analysis of diffractions, offshore marine, and tunnel seismic while drilling (TSWD)
To help solve physical and engineering problems, mimetic or compatible algebraic discretization methods employ discrete constructs to mimic the continuous identities and theorems found in vector calculus. Mimetic Discretization Methods focuses on the recent mimetic discretization method co-developed by the first author. Based on the Castillo-Grone operators, this simple mimetic discretization method is invariably valid for spatial dimensions no greater than three. The book also presents a numerical method for obtaining corresponding discrete operators that mimic the continuum differential and flux-integral operators, enabling the same order of accuracy in the interior as well as the domain boundary. After an overview of various mimetic approaches and applications, the text discusses the use of continuum mathematical models as a way to motivate the natural use of mimetic methods. The authors also offer basic numerical analysis material, making the book suitable for a course on numerical methods for solving PDEs. The authors cover mimetic differential operators in one, two, and three dimensions and provide a thorough introduction to object-oriented programming and C++. In addition, they describe how their mimetic methods toolkit (MTK)-available online-can be used for the computational implementation of mimetic discretization methods. The text concludes with the application of mimetic methods to structured nonuniform meshes as well as several case studies. Compiling the authors' many concepts and results developed over the years, this book shows how to obtain a robust numerical solution of PDEs using the mimetic discretization approach. It also helps readers compare alternative methods in the literature.
A werewolf novel that will have you gripped till the end, not following the usual patterns of most modern horrors around werewolves. Erin is a normal, hard-working psychologist, who has just gained an interesting new patient, Conner. Amid his many problems, he believes himself to be a thing of legend-a werewolf. She is quickly flung into a world between our own and one of the past, seemingly drawn by the mysterious Conner. As she tries to convince him he is not what he thinks, she remembers pieces of herself that tell her otherwise. Both of them will go on a journey that will pull them together and force them to confront their diffcult pasts, all while questioning their own sanity. Erin believes she understands everything that is happening around her, but she is soon to find out that Conner is not all that he seems, as the racing darkness grows closer... Only suitable for readers age 16 and above.
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