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Scrivener Publishing100 Cummings Center, Suite 541J Beverly, MA 01915-6106

Handbook of Petroleum Engineering Series

Series Editor: Wilson C. Chin

Scope:Covering every aspect of petroleum engineering, this new series sets the standard in best practices for the petroleum engineer. This is a must-have for any petroleum engineer in today’s changing industry.

About the Series Editor:

Wilson Chinearned his PhD from M.I.T. and his M.Sc. from Caltech. He has authored over twenty books with Wiley-Scrivener and other major scientific publishers, has more than four dozen domestic and international patents to his credit, and has published over one hundred journal articles, in the areas of reservoir engineering, formation testing, well logging, measurement while drilling, and drilling and cementing rheology.

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Publishers at Scrivener Martin Scrivener ( martin@scrivenerpublishing.com) Phillip Carmical ( pcarmical@scrivenerpublishing.com)

by

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Library of Congress Cataloging-in-Publication Data

ISBN 978-1-119-28332-4

Cover image: Downhole Logging, Aleksei Zakirov | Dreamstime.com

Cover design by Kris Hackerott

Set in size of 11pt and Minion Pro by Manila Typesetting Company, Makati, Philippines

Printed in the USA

10 9 8 7 6 5 4 3 2 1

Formation testing, unlike conventional logging methods focused on resistivity, acoustic, nuclear or magnetic resonance approaches, provides direct results as opposed to indirect inferred properties. In sampling, actual in-situ fluids are collected for surface evaluation. And in pressure transient analysis, properties that pertain to production economics like mobility, compressibility, anisotropy and pore pressure are obtained directly from the underlying Darcy flow equations. By and large, the conventional subject matter deals with single, dual and multiprobe tools where pad nozzles are displaced axially relative to each other and along the same azimuth. This being so, idealized spherical “source” or “sink” methods are used in formulating forward and inverse problems.