ENHANCED OIL RECOVERY ppt

[...]... production—that is, without injected fluid pressure support.” 3 Secondary oil recovery is “a recovery improvement process such as waterflooding or gasflooding.” 4 Enhanced oil recovery, or EOR, is “one or more of a variety of processes that seek to improve the recovery of hydrocarbon from a reservoir after the primary production phase.” 10 2 ENHANCED OIL RECOVERY CONCEPTS Carcoana (1992) describes the intent of EOR... then analyze the decision-making process within that context Enhanced Oil Recovery DOI: 10.1016/B978-1-85617-855-6.00008-5 7 # 2010 Elsevier Inc All rights reserved 8 2 ENHANCED OIL RECOVERY CONCEPTS We take the opportunity here to elaborate on the issue of timing and deployment of EOR methods From traditional definitions of enhanced oil recovery, it is suggested that these strategies should be initiated... This page intentionally left blank C H A P T E R 2 Enhanced Oil Recovery Concepts O U T L I N E 2.1 Introduction 7 2.2 What Is Enhanced Oil Recovery? 8 2.3 Enhanced Oil Recovery Methods 11 2.1 INTRODUCTION In this chapter, we examine some of the principles of enhanced oil recovery (EOR) methods and highlight some of the most important market and technical drivers for EOR Before we can discuss decision... processes to further augment oil recovery beyond secondary recovery (by waterflooding or natural gas injection) in a reservoir Enhanced oil recovery processes include all methods that use external sources of energy and/ or materials to recover oil that cannot be produced economically by conventional means Thomas (2008) refers to both IOR and EOR as follows: 1 Improved oil recovery, or IOR, “is a general... implies improving oil recovery by any means.” 2 Enhanced oil recovery, or EOR, “implies a reduction in oil saturation below residual oil saturation (Sor).” The National Institute for Petroleum and Energy Research in Bartlesville, Oklahoma, produced a report that includes several concepts that are relevant to this discussion (NIPER, 1986) It defines EOR as “petroleum recovery following recovery by conventional... let us examine recovery mechanisms and controls 12 2 ENHANCED OIL RECOVERY CONCEPTS 2.3.1 Oil Recovery Controls First, this subsection is a brief detour in the style of the book to provide background material for understanding EOR methods The question is, why are there limits to recovery in any oil recovery process and in particular the conventional recovery processes of waterflooding and gas injection?... efficiency of water as a displacing agent, which leads to the concept of residual oil saturation 2.3 ENHANCED OIL RECOVERY METHODS 13 or immobile oil fraction in the rock The higher this saturation value (the more oil that stays trapped in the rock), the lower the recovery of oil To understand how the pore-level trapping of oil can be overcome, we need to write the first dimensionless number, the capillary... EOR decision making 2.2 WHAT IS ENHANCED OIL RECOVERY? We have been talking about EOR-related topics with only a broad understanding of exactly what enhanced oil recovery is If any concept is a source of heated controversy, it is EOR This book does not distinguish between traditional approaches to EOR and other technologies associated with the concept of improved oil recovery (IOR) for a good reason... in light oil (> 35 API gravity) and low-permeability (< 50 md) reservoirs In addition, gravity drainage represents the most effective gas-injection strategy (updip injection and down-dip production), which clearly exemplifies the impact of reservoir geology on oil recovery mechanisms by gas flooding 14 2 ENHANCED OIL RECOVERY CONCEPTS Finally, reservoir pressure also plays a key role in oil recovery. .. only for the distant future Enhanced oil recovery not only provides a way to increase reserves, which is loosely defined as oil you can extract by commercial means, but it also might offer an economic way to prolong the productive life of assets and delay the decommissioning stage that most companies abhor This page intentionally left blank C H A P T E R 2 Enhanced Oil Recovery Concepts O U T L I . vii Introduction ix 1. Reservoir Development Plans 1 2. Enhanced Oil Recovery Concepts 7 2.1 Introduction 7 2.2 What Is Enhanced Oil Recovery? 8 2.3 Enhanced Oil Recovery Methods 11 3. Simulations and Simulation. (Vladimir) Enhanced oil recovery : field planning and development strategies — V. Alvarado and E. Manrique p. cm. Includes bibliographical references and index. ISBN 978-1-85617-855-6 1. Enhanced oil recovery. . on enhanced oil recovery (EOR). In this sense, it focuses on the decision-making that leads to launching EOR projects. In the context of this book, any strategy that ultimately increases oil and