Six years ago, at the end of my professional career in the oil industry, I left my management position within Agip S.p.A., a major multinational oil company whose headquarters are in Italy, to take up the chair in reservoir engineering at the University of Bologna, Italy. There, I decided to prepare what was initially intended to be a set of lecture notes for the students attending the course. However, while preparing these notes, I became so absorbed in the subject matter that I soon found myself creating a substantial volume of text which could not only serve as a university course material, but also as a reference for wider professional applications. Thanks to the interest shown by the then president of Agip, Ing. Giuseppe Muscarella, this did indeed culminate in the publication of the first Italian edition of this book in 1989. The translation into English and publication of these volumes owes much to the encouragement of the current president of Agip, Ing. Guglielmo Moscato. My grateful thanks are due to both gentlemen. And now - the English version, translated from the second Italian edition, and containing a number of revisions and much additional material. As well as providing a solid theoretical basis for the various topics, this work draws extensively on my 36 years of worldwide experience in the development and exploitation of oil and gas fields.

The Complete, Up-to-Date, Practical Guide to Modern Petroleum Reservoir Engineering This is a complete, up-to-date guide to the practice of petroleum reservoir engineering, written by one of the world’s most experienced professionals. Dr. Nnaemeka Ezekwe covers topics ranging from basic to advanced, focuses on currently acceptable practices and modern techniques, and illuminates key concepts with realistic case histories drawn from decades of working on petroleum reservoirs worldwide. Dr. Ezekwe begins by discussing the sources and applications of basic rock and fluid properties data. Next, he shows how to predict PVT properties of reservoir fluids from correlations and equations of state, and presents core concepts and techniques of reservoir engineering. Using case histories, he illustrates practical diagnostic analysis of reservoir performance, covers essentials of transient well test analysis, and presents leading secondary and enhanced oil recovery methods. Readers will find practical coverage of experience-based procedures for geologic modeling, reservoir characterization, and reservoir simulation. Dr. Ezekwe concludes by presenting a set of simple, practical principles for more effective management of petroleum reservoirs. With Petroleum Reservoir Engineering Practice readers will learn to • Use the general material balance equation for basic reservoir analysis • Perform volumetric and graphical calculations of gas or oil reserves • Analyze pressure transients tests of normal wells, hydraulically fractured wells, and naturally fractured reservoirs • Apply waterflooding, gasflooding, and other secondary recovery methods • Screen reservoirs for EOR processes, and implement pilot and field-wide EOR projects. • Use practical procedures to build and characterize geologic models, and conduct reservoir simulation • Develop reservoir management strategies based on practical principles Throughout, Dr. Ezekwe combines thorough coverage of analytical calculations and reservoir modeling as powerful tools that can be applied together on most reservoir analyses. Each topic is presented concisely and is supported with copious examples and references. The result is an ideal handbook for practicing engineers, scientists, and managers—and a complete textbook for petroleum engineering students.

Volume 1 of this book dealt with the techniques behind the acquisition, processing and interpretation of basic reservoir data. This second vol ume is devoted to the study, verification and prediction of reservoir behaviour, and methods of increasing productivity and oil recovery. I should like to bring a few points to the reader's attention. Firstly, the treatment of immiscible displacement by the method of characteristics. The advantage of this approach is that it brings into evidence the various physical aspects of the process, especially its dependence on the properties of the fluids concerned, and on the velocity of displacement. It was not until after the publication of the first, Italian, edition of this book (February 1990) that I discovered a similar treatment in the book Enhanced Oil Recovery, by Larry W. Lake, published in 1989. Another topic that I should like to bring to the reader's attention is the forecasting of reservoir behaviour by the method of identified models. This original contribution to reservoir engineering is based on systems theory - a science which should, in my opinion, find far wider applica tion, in view of the "black box" nature of reservoirs and their responses to production processes.

Ein ausführlicher Praxisleitfaden zu Methoden für die Lösung komplexer Probleme in der Erdöltechnik. In der Erdöltechnik dominieren übergreifende wissenschaftliche und mathematische Prinzipien. Allerdings gibt es immer wieder Lücken zwischen Theorie und praktischer Anwendung. Petroleum Engineering: Principles, Calculations, and Workflows stellt Methoden für die Lösung einer Vielzahl praktischer Probleme in der Erdöltechnik vor. Jedes Kapitel beschäftigt sich mit einer spezifischen Problemstellung, beschreibt Formeln zur Erläuterung der primären Prinzipien dieses Problems und zeigt im Anschluss einfach nachvollziehbare Handreichungen für die praktische Anwendung. Hauptmerkmale dieses Bandes: - Fundierter und integrierter Ansatz für die Lösung inverser Probleme. - Ausführliche Untersuchung der Abläufe, einschließlich Modell- und Parametervalidierung. - Einfache Ansätze für die Lösung komplexer mathematischer Probleme. - Komplexe Berechnungen, die sich mit einfachen Methoden leicht implementieren lassen. - Überblick über wichtige Herangehensweisen, die für die Software- und Anwendungsentwicklung notwendig sind. - Formel- und Modellhandreichungen für die Diagnose, erstmalige Parametermodellierung, Simulation und Regression. Petroleum Engineering: Principles, Calculations, and Workflows ist ein wertvolles Referenzwerk für die Praxis und richtet sich an eine breite Zielgruppe: Geowissenschaftler, Explorationsgeologen und Ingenieure. Dieser zugängliche Leitfaden, ein fundiertes Nachschlagewerk für die Lösung alltäglicher Probleme in der Eröltechnik, eignet sich ebenfalls gut für Studenten im Hauptstudium, Postgraduierte, Berater, Softwareentwickler und Berufspraktiker.

This book wxplains the fundamentals of reservoir engineering and their practical application in conducting a comprehensive field study.Two new chapters have been included in this second edition: chapter 14 and 15.

Simulate reservoirs effectively to extract the maximum oil, gas and profit, with this book and free simlation software on companion web site.

The need for this book has arisen from demand for a current text from our students in Petroleum Engineering at Imperial College and from post-experience Short Course students. It is, however, hoped that the material will also be of more general use to practising petroleum engineers and those wishing for aa introduction into the specialist literature. The book is arranged to provide both background and overview into many facets of petroleum engineering, particularly as practised in the offshore environments of North West Europe. The material is largely based on the authors' experience as teachers and consultants and is supplemented by worked problems where they are believed to enhance understanding. The authors would like to express their sincere thanks and appreciation to all the people who have helped in the preparation of this book by technical comment and discussion and by giving permission to reproduce material. In particular we would like to thank our present colleagues and students at Imperial College and at ERC Energy Resource Consultants Ltd. for their stimulating company, Jill and Janel for typing seemingly endless manuscripts; Dan Smith at Graham and Trotman Ltd. for his perseverence and optimism; and Lesley and Joan for believing that one day things would return to normality. John S. Archer and Colin G. Wall 1986 ix Foreword Petroleum engineering has developed as an area of study only over the present century. It now provides the technical basis for the exploitation of petroleum fluids in subsurface sedimentary rock reservoirs.