ADVANCES IN WELL TEST ANALYSIS EARLOUGHER PDF

Introduction 1. As the term is used in this monograph, pressure transient testing includes generating and measuring pressure variations with time in wells and, subsequently, estimating rock, fluid, and well properties. Practical information obtainable from transient testing includes wellbore volume, damage, and improvement; reservoir pressure; permeability; porosity; reserves; reservoir and fluid discontinuities; and other related data. All this information can be used to help analyze, improve, and forecast reservoir performance. It would be a mistake to either oversell or undersell pressure transient testing and analysis.

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Earlougher, Jr. Second Printing Henry L. Matthews" and D. Subsequently, there has been a significant expansion of knowledge about well esting, much of ita result ofthe application of reservoir simulators. Publication of this monograph does not imply the belief that such advances will not continue, for they certainly will, T expect that there will be updated well test analysis monographs at regular intervals for many years to come.

As a result, there are many compromises. A high degree of technical accuracy not always available is sometimes sacrificed to provide methods with practical utility. In writing this book, I have made many value judgments, not only as to the accuracy and.

In general, Thave attempted to provide information that can be used readily for practical and real problems. Most parts of the monograph give guidelines for applicability of various analysis techniques. One set of nomenclature is applied to all types of well testing. To show the interrelation and the minor differences between various tests, Tinclude in Appendix E a comparison table that should be useful tothe frequent monograph user.

There are no derivations, although the method for deriving some of the equations is suggested. The reader must return to the original reference material cited to find derivations. I believe that most users ofthis monograph will find it logically organized and readily applicable to many well testing problems. Nevertheless, there will arise many situations for which the answer does not appear in this monograph and which will require further research on the part of the reader.

AS years pass, many. In particular, 1 am indebted to three of my Marathon colleagues, H. Bixel, Hossein Kazemi, and Shri B. In so doing, we have developed a philosophy for presenting wel test analysis material, and have leamed which techniques are most successful and which are feast successful for conveying information in an understandable and useable fashion.

That philosophy and background pervade this monograph — itis impossible to separate my contributions from those of Messrs Bixel, Kazemi, and Mathur. Additionally, Messrs, Bixel, Kazemi, and Mathur have contributed signifi- cantly to the presentation of much ofthe material in the monograph, if notin detail at leastin substance.

They have spent hundreds of hours reading, checking, ang critically commenting on all aspects of the material and its presentation. There is no doubt that the monograph is a much better volume than it would have been without their aid Marie E. LeBlanc typed the many versions of the manuscript required to reach the final form.

Her secretarial skills and command of the English language have enabled preparation of this volume to proceed smoothly and on schedule. Sally M, Andrews illustrated the monograph. The Series is intended to provide members with an authoritative, up-to-date treatment of the fundamental principles and state of the art in selected fields of technology.

Technical evaluation is provided by the Monograph Review Committee. Below is a listing of those who have been most closely involved with the preparation of this book. Monograph Coordinator William C. Miller, Shell Development Co. Campbell, Continental Oil Co. Driscoll, Amoco Production Co.

Sanders, Amoco Production Co. Zink, Continental Oil Co. Pulse Testing 9. Effect of Reservoir Heterogeneities on Pressure Behavior Effect of Wellbore Conditions on Pressure jehavior na Introduction Changing Wellbore Storage Antficially Fractured Wells Computer-Aided Well West Analysis Test Design and instrumentation Choice of Test Type Closed Systems C.

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