Naturally fractured reservoir characterization by wayne. This course is designed for geologists, geophysicists and reservoir engineers who are part of multidisciplinary teams focusing on the integrated characterization, evaluation, modeling and development of naturally fractured reservoirs nfr. He held the title of senior research consultant for chevron energy technology company where he worked for 27 years on an array of international projects that included reservoir structural geology studies, consulting, technology development, training, and exploration. Naturally fractured reservoirs nfrs account for a significant fraction of the worlds petroleum reserves but pose significant challenges for reservoir characterization and simulation. Fractured reservoirs using conventional well logs liliana p. Geologic analysis of naturally fractured reservoirs gulf professional publishing singhal, b. Naturally fractured reservoir characterization course description. Understanding naturally fractured reservoirs onepetro. The behavior of naturally fractured reservoirs onepetro. Characterization of naturally fractured reservoirs. Naturally fractured reservoir characterization spe bookstore. In this work, we develop a novel workflow for the geologically realistic modeling of a fractured carbonate reservoir.
Characterization of naturally fractured reservoirs wayne. Natural fractures significantly impact producibility of the flank portion of the reservoir. Reservoir characterization of fractured reservoirs in western canada m. Narr, wayne 2006 naturally fractured reservoir characterization society of petroleum nelson, ronald 2001, second ed. This article discusses two naturally fractured reservoir models, the physics governing fluid flow in these reservoirs and semilog and type curve analysis techniques for well tests in these reservoirs. Naturally fractured reservoirs are elusive systems to characterize and difficult to engineer and predict. This led to the multiple continua concept where typically two continua, matrix and fracture, overlap each other. Comparison of discretefracture and dualpermeability models for. Natural fractures are more common in carbonate rocks. Unfortunately, there are few guidelines available for geologists and engineers characterizing and engineering naturally fractured reservoirs. Fractures at tengiz a giant, naturally fractured reservoir in the caspian basin of. They are also notorious for early gas or water breakthrough. Naturally fractured reservoir wayne narr et al free download as. Naturally fractured reservoirs nfrs are among the most difficult.
The existence of fractures that affect flow and transport, are. The behavior of naturally fractured reservoirs joi%warren p, j, rqot members aime abstract an idealized model has been developed for the purpose of studying the characteristic behavioroja permeable medium which contains regions which contribute sigizificantly to tbe pore volume o. Practical aspects of simulation of fractured reservoirs 08012003 2003, james r. The combination of innovative field acquisition technologies and improved processing. Fractured reservoirs such as tight carbonates and basements set complex challenges to appraisal and development teams due to their high degree of heterogeneity and hardtopredict reservoir quality. Naturally fractured reservoir characterization digital edition.
Naturally fractured reservoirs nfrs have been studied intensively for several decades in the geologic and engineering fields and recently, two new approaches have been proposed to address the problem of transient pressure testing in naturally fractured reservoirs. On the other hand, they represent some of the largest most productive reservoirs on earth. Petroleum engineering 619 naturally fractured reservoirs fall. Abstract the author has worked on a number of fractured reservoirs in western canada, which show common characteristics. This course covers geologic and engineering concepts, methodology, and technology used to characterize, evaluate, and manage naturally fractured reservoirs. Wayne narr is a structural geologist with interest in characterization and modeling of naturally fractured reservoirs. It discusses practical aspects of largescale numerical simulation of naturally fractured. Field examples and case studies demonstrate the importance of. Seismic characterization of naturally fractured reservoirs. Naturally fractured reservoirs training course petroskills fr.
Wayne narr is the author of naturally fractured reservoir characterization 3. Discretization and gridding in reservoir simulation 2. Petrophysical characterization of carbonate naturally. Fractured reservoir characterization and simulation. Wayne narr is a structural geologist at chevron energy technology company in san ramon, ca, where he works on both technology development and consulting projects involving naturally fractured reservoirs. Abstract two discretefracture models dfms based on different. Naturally fractured reservoirs nfrs hold a significant amount of the worlds. They include reservoirs with low hydrocarbon recovery. Maximizing economic recovery from naturally fractured reservoirs is a complex process. Naturally fractured reservoirs present unique and specialized challenges to hydrocarbon extraction. Applications and limitations of geologic procedures and tools are discussed.
Practical aspects of simulation of fractur ed reservoirs j. Characterization of fractures in the tengiz reservoir has two primary. Production performance, pressure transient responses and stimulation results are discussed. The petrophysical characterization models must correspond to the elements and their behavior of carbonated naturally fractured reservoir, reason why they are useful in the obtaining of petrophysics parameters because the exact relations between the characteristics of the rock often do not exist due to. Jakarta, indonesia a lot of case studies, practical things and exercises learn the practical aspects of reservoir characterization in naturally fractured reservoir for optimum performance.
This course covers geologic concepts, methodology, and technology used to characterize, evaluate, and manage naturally fractured reservoirs. Logs are the most readily available source of information, however they are seldomly used in a systematic manner for quantitative analysis of naturally fractured reservoirs. However, such reservoirs are often naturally fractured. Understanding and predicting fractures at tengiz a giant, naturally fractured reservoir in the caspian basin of kazakhstan by wayne narr1, dennis j. If the matrix has reservoir quality and the fractures are interconnected, building more or less extended networks, then the reservoir can not be modeled as a single continuum anymore. Pdf characterization of naturally fractured reservoirs. Introduction the development of reservoir modeling and reservoir characterization for naturally fractured reservoirs nfrs has lagged behind simpler matrix flow dominated rock. Characterization, evaluation and enhanced oil recovery in. It requires a thorough understanding of matrix flow characteristics, fracture network connectivity and fracturematrix interaction. This fiveday course is designed for geologists, geophysicists and reservoir engineers who are part of multidisciplinary teams focusing on the integrated characterization, evaluation, modeling and development of naturally fractured reservoirs nfr. Naturally fractured reservoirs have been classified according to the relative contribution of the matrix and fractures to the total fluid production. In this stage a sand box technique based on different radius for obtaining an intensity pattern in the reservoir is used.
Naturally fractured reservoirs present a production paradox. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This paper presents a technique for the identification and characterization of naturally fractured reservoirs using conventional well logs. Mapping of fracture corridors in naturally fractured carbonate reservoirs worldwide fractured analogues for reservoir characterization will be introduced on day 1, and case studies will be selected and further discussed throughout the threeday course. Naturally fractured reservoir characterization by wayne narr, david s. Wayne narr author of naturally fractured reservoir. Naturally fractured reservoirs are characterized by the presence of two distinct types of porous media. Applications and limitations of geologic and engineering procedures and tools are discussed.
Recognizing naturally fractured reservoirs petrowiki. The fracture patterns in these reservoirs can control flow and transport properties, and therefore, play an important role in drilling production wells. Naturally fractured reservoir characterization narr, wayne on. The course not only provides an introduction to nfr and their development, but also covers stateofart advances in fracture characterization and flow modeling technologies. Many hydrocarbon reservoirs have sufficient porosity but low permeability for example, tight gas sands and coal beds. Fractured reservoir characterization, evaluation and modeling. Fractures, both natural and engineered, provide major conduits or. He held the title of senior research consultant for chevron energy technology company where he worked for 27 years on an array of international projects that included reservoir structural geology studies. Natural fractures are increasingly recognized as dominant permeability paths in many reservoirs. Unlike induced fractures, natural fractures are caused by stress in the formation usually from tectonic forces such as folds and faults.
Wayne narr is an independent consultant and a member of spe. Naturally fractured reservoir wayne narr et al scribd. Pdf understanding and predicting fractures at tengiza giant. Understanding and predicting fractures at tengiz a giant, naturally fractured reservoir in the caspian basin of kazakhstan by. Buy naturally fractured reservoir characterization by narr, wayne isbn. Everyday low prices and free delivery on eligible orders. The results obtained from the integrated strategy allow us to deduce in the characterization of reservoir, by knowing the possible flow conductivity in the topology of the fractures viewed as complex network. Fractured reservoir characterisation with emphasis on carbonates. A recent applied technology workshop atw held in houston, naturally fractured reservoirs, explored reservoir characterization, fracturenetwork modeling and reservoir simulation, and experience with improvedoilrecovery ior and enhancedoilrecovery eor processes in naturally fractured reservoirs nfrs. Reservoir characterization for naturally fractured reservoirs.
Naturally fractured naturally fractured reservoir characterizationreservoir characterization date. It is important to establish some basic criteria for recognizing when fractures are an important element in reservoir performance and to recognize the nature and performance characteristics of a naturally fractured reservoir. Naturally fractured reservoir characterization by wayne narr, 9781555631123, available at book depository with free delivery worldwide. Naturally fractured reservoirs characterization is the key to success. His earlier industry experience includes a variety of structuralgeology interpretation work, mainly involving complexly deformed foldthrust.
Characterization, evaluation and enhanced oil recovery in naturally fractured reservoirs. A reservoir simulation approach for modeling of naturally. A fractured reservoir is one in which naturally occurring fractures either have or are predicted to have a significant effect on reservoir fluid flow in the form of 1 increased reservoir permeability, 2 increased porosity, andor 3 increased permeability anisotropy. Naturally fractured reservoir characterization wayne narr. Characterization of fractures in the tengiz reservoir has two primary objectives. Fractures occur in preferential directions, determined by the direction of regional stress.
Characterization of naturally fractured reservoirs wayne narr ed. Natural fractured reservoir engineering phdg textbooks in preparation, intended to be issued during 2015. Gilman, this document accompanies a presentation given at the 2003 international forum on reservoir simulation. Well production heterogeneity is a characteristic of most naturally fractured reservoirs. The behavior of naturally fractured reservoirs nfrs is distinctly different from that of. To describe flow in naturally fractured reservoirs, double pomsity model has been widely used. Gilman, page 4 of 35 with all these issues, there may appear to be little hope of. Wayne narr is a structural geologist and senior research consultant at chevron energy technology. Naturally fractured reservoir characterization by wayne narr 20060630 on. Naturally fractured reservoir characterization seeks to confront many of these challenges by providing an introduction to the engineering and geological character of naturally fractured reservoirs.
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