The Imperial College Lectures in PETROLEUM ENGINEERING Fluid Flow in Porous Media Volume 5 Q0146_9781786344991_TP.indd 1 22/2/18 4:11 PM Other Related Titles from World Scientific The Imperial College Lectures in Petroleum Engineering Volume 1: An Introduction to Petroleum Geoscience by Michael Ala ISBN: 978-1-78634-206-5 The Imperial College Lectures in Petroleum Engineering Volume 2: Reservoir Engineering by Martin J Blunt ISBN: 978-1-78634-209-6 The Imperial College Lectures in Petroleum Engineering Volume 3: Topics in Reservoir Management by Deryck Bond, Samuel Krevor, Ann Muggeridge, David Waldren and Robert Zimmerman ISBN: 978-1-78634-284-3 The Imperial College Lectures in Petroleum Engineering Volume 4: Drilling and Reservoir Appraisal by Olivier Allain, Michael Dyson, Xudong Jing, Christopher Pentland, Marcel Polikar and Sander Suicmez ISBN: 978-1-78634-395-6 Herbert Moses - Q0146 - The Imperial College Lectures in Petroleum Engineering.indd 1 01-03-18 2:44:39 PM The Imperial College Lectures in PETROLEUM ENGINEERING Fluid Flow in Porous Media Volume 5 Robert W. Zimmerman Imperial College London, UK World Scientific NEW JERSEY • LONDON • SINGAPORE • BEIJING • SHANGHAI • HONG KONG • TAIPEI • CHENNAI • TOKYO Q0146_9781786344991_TP.indd 2 22/2/18 4:11 PM Published by World Scientific Publishing Europe Ltd. 57 Shelton Street, Covent Garden, London WC2H 9HE Head office: 5 Toh Tuck Link, Singapore 596224 USA office: 27 Warren Street, Suite 401-402, Hackensack, NJ 07601 Library of Congress Cataloging-in-Publication Data Names: Zimmerman, Robert Wayne, author. Title: Fluid flow in porous media / by author: Robert Zimmerman (Imperial College London, United Kingdom). Description: [Hackensack] New Jersey : World Scientific, [2018] | Series: The Imperial College lectures in petroleum engineering ; volume 5 | Includes bibliographical references. Identifiers: LCCN 2017048948 | ISBN 9781786344991 (hc : alk. paper) Subjects: LCSH: Oil reservoir engineering. | Petroleum--Migration. | Fluids--Migration. Classification: LCC TN870.57 .Z56 2018 | DDC 622/.3382--dc23 LC record available at https://lccn.loc.gov/2017048948 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. Copyright © 2018 by World Scientific Publishing Europe Ltd. All rights reserved. This book, or parts thereof, may not be reproduced in any form or by any means, electronic or mechanical, including photocopying, recording or any information storage and retrieval system now known or to be invented, without written permission from the Publisher. For photocopying of material in this volume, please pay a copying fee through the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, USA. In this case permission to photocopy is not required from the publisher. For any available supplementary material, please visit http://www.worldscientific.com/worldscibooks/10.1142/Q0146#t=suppl Desk Editors: Herbert Moses/Jennifer Brough/Shi Ying Koe Typeset by Stallion Press Email: [email protected] Printed in Singapore Herbert Moses - Q0146 - The Imperial College Lectures in Petroleum Engineering.indd 2 01-03-18 2:44:39 PM March1,2018 14:32 FluidFlowinPorousMedia-9inx6in b3114-fm pagev Preface This book is the fifth volume of a set of lecture notes based on the Master of Science course in Petroleum Engineering that is taught within theDepartment of EarthScience andEngineeringat Imperial CollegeLondon.ThePetroleumEngineeringMScisaone-yearcourse thatcomprisesthreecomponents:(a)asetoflecturesonthedifferent topics that constitute the field of petroleum engineering, along with associated homework assignments and examinations; (b) a group field project in which the class is broken up into groups of about six students, who then use data from an actual reservoir to develop the field from the initial appraisal based on seismic and geological data, all the way through to eventual abandonment; and (c) a 14- week individual project, in which each student investigates a specific problem and writes a small “thesis” in the format of an SPE paper. The Petroleum Engineering MSc course has been taught at Imperial College since 1976, and has trained over a thousand petroleum engineers. The course is essentially a “conversion course” that aims to take students who have an undergraduate degree in some area of engineering or physical science, but not necessarily any specific experience in petroleum engineering, and train them to the point at which they can enter the oil and gas industry as petroleum engineers. Although the incoming cohort has included students with undergraduate degrees in fields as varied as physics, mathematics, geology, and electrical engineering, the “typical” student on the course has an undergraduate degree in chemical or mechanical v March1,2018 14:32 FluidFlowinPorousMedia-9inx6in b3114-fm pagevi vi Fluid Flow in Porous Media engineering,andlittleifanypriorexposuretopetroleumengineering. Althoughsomestudentsenterthecoursehavinghadsomeexperience in the oil industry, the course is intended to be self-contained, and prior knowledge of petroleum engineering or geology is not a prerequisite for any of the lecture modules. The present volume presents the equations of fluid flow in porous media, with a focus on topics and issues that are relevant to petroleum reservoir engineering. No prior knowledge of this topic is assumed on the part of the reader, and particular attention is given to a careful mathematical and conceptual development of the governing equations, and to presenting solutions to important reservoir flow problems. The mathematical level is intended to be accessible to third- or fourth-year undergraduate students in engineering. Advanced topics such as Laplace transforms and Bessel functions, which play a key role in solving reservoir engineering problems, are developed in a self-contained manner. Although these notes have been written with a focus on petroleum engineering, it is expected that they will also be useful to hydrologists and civil engineers. The author thanks the editorial and production staff at World Scientific for bringing this book to completion so rapidly and professionally. SpecialthanksgotoDr.HanlidelaPorteof PetroSim Consultants, who read the first draft of this book, and whose comments, criticisms, and suggestions helped to greatly improve its readability and practical relevance. Robert W. Zimmerman Imperial College London January 2018 March1,2018 14:32 FluidFlowinPorousMedia-9inx6in b3114-fm pagevii About the Author Robert W. Zimmerman obtained a BS and MS in mechanical engineering from Columbia University, and a PhD in rock mechanics from the University of California at Berkeley. He has been a lecturer at UC Berkeley, a staff scientist at the Lawrence Berkeley National Laboratory, and Head of the Division of Engineering Geology and Geophysics at the Royal Institute of Technology (KTH) in Stockholm. He is the Editor-in-Chief of the International Journal of Rock Mechanics and Mining Sciences, and serves on the Editorial Boards of Transport in Porous Media and the International Journal of EngineeringScience.HeistheauthorofthemonographCompress- ibility of Sandstones (Elsevier, 1991), and co-author, with JC Jaeger andNGWCook,ofFundamentals ofRock Mechanics (4thed.,Wiley- Blackwell, 2007). He is currently Professor of Rock Mechanics at Imperial College, where he conducts research on rock mechanics and fracturedrockhydrology,withapplicationstopetroleumengineering, underground mining, carbon sequestration, and radioactive waste disposal. vii b2530 International Strategic Relations and China’s National Security: World at the Crossroads TTTThhhhiiiissss ppppaaaaggggeeee iiiinnnntttteeeennnnttttiiiioooonnnnaaaallllllllyyyy lllleeeefffftttt bbbbllllaaaannnnkkkk b2530_FM.indd 6 01-Sep-16 11:03:06 AM March1,2018 14:32 FluidFlowinPorousMedia-9inx6in b3114-fm pageix Contents Preface v About the Author vii Chapter 1. Pressure Diffusion Equation for Fluid Flow in Porous Rocks 1 1.1. Darcy’s Law and the Definition of Permeability . . . . . 1 1.2. Datum Levels and Corrected Pressure . . . . . . . . . . . 5 1.3. Concept of Representative Elementary Volume . . . . . 6 1.4. Radial, Steady-state Flow to a Well . . . . . . . . . . . . . 7 1.5. Conservation of Mass Equation . . . . . . . . . . . . . . . . 10 1.6. Diffusion Equation in Cartesian Coordinates . . . . . . . 12 1.7. Diffusion Equation in Cylindrical Coordinates . . . . . . 16 1.8. Governing Equations for Multi-phase Flow . . . . . . . . 18 Problems for Chapter 1 . . . . . . . . . . . . . . . . . . . . . . . . 20 Chapter 2. Line Source Solution for a Vertical Well in an Infinite Reservoir 23 2.1. Derivation of the Line Source Solution . . . . . . . . . . . 23 2.2. Dimensionless Pressure and Time . . . . . . . . . . . . . . 30 2.3. Range of Applicability of the Line Source Solution . . . 33 2.4. Logarithmic Approximation to the Line Source Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.5. Instantaneous Pulse of Injected Fluid . . . . . . . . . . . . 37 ix