Atlas of Natural and Induced Fractures in Core

ISBN-13: 9781119160007 / Angielski / Twarda / 2017 / 328 str.

Lorenz, John C.; Cooper, Scott P.

Opis

This atlas will provide a reference for the increasing number of geologists who have little or no experience in the interpretation of natural and induced fractures in cores. This inexperience derives from several factors including the gap between most geologists' experience and the advancing understanding of fractures in cores, the new crop of young geologists without mentors, and the growing disconnect between geologists and rig-site operations. Geologists used to -sit a well- for days at a time during critical operations and they became familiar with the aspects of coring operations which might produce artificial fractures in the core samples. Most such well-site operations are now contracted to intermediary service companies, creating a disconnect and commonly an inability to even distinguish between artificial -induced- fractures and natural fractures. The natural and induced fracture data contained in cores can provide a wealth of information if recognized and properly interpreted. This atlas will be useful to geologists charged with interpreting fracture-controlled permeability systems in reservoirs, and to students or the numerous other scientists collecting fracture data from cores. Increasing numbers of cores are being cut as the hydrocarbon industry recognizes that image logs do not provide the panacea for wellbore fracture interpretation that was originally hoped for. It is apparent that there is a significant need for a tool to help with the accurate interpretation of these cores. Evidence for that need includes the fact that the authors work as consultants who are in high demand for their skills in interpreting fractures in cores. The Atlas of Natural Fractures and Coring-Induced Structures in Core provides a means for identification of the different fracture types in cores as well as criteria for distinguishing between the types of fractures. Some fracture types are wide-spread and control the basic plumbing in a reservoir, others are local and provide orientation references or useful information on the in situ stress system, thus it is essential to be able to recognize the different fracture type in order to make use of the data. It is also useful to be able to recognize non-fracture artifacts in a core since many of them provide other types of useful information. The structures illustrated in the book combined with their basic interpretations are only the primary building blocks of a complete fracture assessment and analysis. These building blocks must be recognized and correctly interpreted if subsequent analyses, interpretations, and modeling efforts regarding fracture-controlled reservoir permeability are to be valid.

Recenzje

"A high quality publication that should be an essential text in any and all core facilities and essential reading for anyone who spends time looking at core." Geoscientist Online

O autorze

John C. Lorenz and Scott P. Cooper are Senior Geologists with FractureStudies LLC in Edgewood, New Mexico.

Blurb

An invaluable reference that helps geologists recognize and differentiate the many types of natural fractures, induced fractures and artefacts found in cores

Atlas of Natural and Induced Fractures in Core offers a reference for the interpretation of natural and induced fractures in cores. The natural and induced fracture data contained in cores provides a wealth of information once they are recognized and properly interpreted. Written by two experts in the field, this resource provides a much–needed tool to help with the accurate interpretation of these cores.

The authors include the information needed to identify different fracture types as well as the criteria for distinguishing between the types of fractures. The atlas shows how to recognize non–fracture artefacts in a core since many of them provide other types of useful information. In addition, the text′s illustrated structures combined with their basic interpretations are designed to be primary building blocks of a complete fracture assessment and analysis. The authors show how to recognize and correctly interpret these building blocks to ensure that subsequent analyses, interpretations, and modeling efforts regarding fracture–controlled reservoir permeability are valid.

Presented in full color throughout, this comprehensive reference is written for geologists charged with interpreting fracture–controlled permeability systems in reservoirs as well as for students or other scientists who need to develop the skills to accurately interpret the natural and induced fractures in cores.