[PDF] Subsurface Horizontal Microfracture Propagation Within The Middle Member Of The Bakken Formation Williston Basin North Dakota eBook

Author : Shashank Khatri
Publisher :
Page : 92 pages
File Size : 27,9 MB
Release : 2017
Category :
ISBN :

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The Bakken formation in the Elm Coulee Field of the Williston Basin consists of three members: 1) upper shale member, 2) middle silty dolostone member, and 3) lower shale member. The upper and lower members act as excellent source rocks and the main reservoir is the middle member with an average porosity of 3 to 9% and average permeability of 0.04md. The Bakken oil play in this area is a stratigraphic trap with a pinch-out to the southwest and a diagenetic facies change in the northeast. The main production is interpreted to come from matrix permeability in the field area. However, the first year production trends from the Elm Coulee Field show areas of anomalously high production. This study used 3D seismic data from Crane Field, which is located in the southeastern part of the Elm Coulee Field, to investigate structures which might be responsible for the anomalous production trends at the Elm Coulee Field. We used post stack seismic conditioning and seismic attributes to amplify the structure of the basement. Further investigation revealed the presence of a pop-up structure in the central portion overlying a zone of basement deformation. This zone of deformation was interpreted to be composed of a left lateral wrench faulting system based on a model-driven approach. This study goes on further to map the structure and faults in 3 dimensions using a model driven approach, which reveals that the pop-up structure evolved from an obtuse angle left lateral step over system in the basement. In addition, the presence of this left lateral wrench fault network is interpreted to be related to a regional left lateral strike slip system - the Brockton Froid Fault Zone The fracture network characteristics in the middle member of the Bakken Formation are directly related to the local stresses generated by the interpreted left lateral wrench fault system in the study. There are two fracture sets- NE-SW and NW-SE. The structure and fracture network characteristics help explain the presence of regions of anomalously high EUR [CB1] values in the Elm Coulee Field. The regions of anomalously high EURs in the Elm Coulee Field may be regions where the middle member of the Bakken Formation has increased natural fracturing related to the local stresses induced by left-lateral oblique slip strike slip faults..

Author : Ronald Nelson
Publisher : Elsevier
Page : 353 pages
File Size : 36,40 MB
Release : 2001-08-24
Category : Technology & Engineering
ISBN : 0080507298

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Geologists, engineers, and petrophysicists concerned with hydrocarbon production from naturally fractured reservoirs will find this book a valuable tool for obtaining pertinent rock data to evaluate reserves and optimize well location and performance. Nelson emphasizes geological, petrophysical, and rock mechanics to complement other studies of the subject that use well logging and classical engineering approaches. This well organized, updated edition contains a wealth of field and laboratory data, case histories, and practical advice. A great how-to-guide for anyone working with fractured or highly anisotropic reservoirs Provides real-life illustrations through case histories and field and laboratory data

Author : Larry Lake
Publisher : Elsevier
Page : 680 pages
File Size : 38,95 MB
Release : 2012-12-02
Category : Technology & Engineering
ISBN : 0323143512

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Reservoir Characterization is a collection of papers presented at the Reservoir Characterization Technical Conference, held at the Westin Hotel-Galleria in Dallas on April 29-May 1, 1985. Conference held April 29-May 1, 1985, at the Westin Hotel—Galleria in Dallas. The conference was sponsored by the National Institute for Petroleum and Energy Research, Bartlesville, Oklahoma. Reservoir characterization is a process for quantitatively assigning reservoir properties, recognizing geologic information and uncertainties in spatial variability. This book contains 19 chapters, and begins with the geological characterization of sandstone reservoir, followed by the geological prediction of shale distribution within the Prudhoe Bay field. The subsequent chapters are devoted to determination of reservoir properties, such as porosity, mineral occurrence, and permeability variation estimation. The discussion then shifts to the utility of a Bayesian-type formalism to delineate qualitative ""soft"" information and expert interpretation of reservoir description data. This topic is followed by papers concerning reservoir simulation, parameter assignment, and method of calculation of wetting phase relative permeability. This text also deals with the role of discontinuous vertical flow barriers in reservoir engineering. The last chapters focus on the effect of reservoir heterogeneity on oil reservoir. Petroleum engineers, scientists, and researchers will find this book of great value.

Author : Gary Mavko
Publisher : Cambridge University Press
Page : 525 pages
File Size : 16,60 MB
Release : 2009-04-30
Category : Nature
ISBN : 0521861365

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A significantly expanded new edition of this practical guide to rock physics and geophysical interpretation for reservoir geophysicists and engineers.

Author : Bill Rehm
Publisher : Elsevier
Page : 680 pages
File Size : 33,75 MB
Release : 2013-11-25
Category : Science
ISBN : 0127999809

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The present crude oil and natural gas reservoirs around the world have depleted conventional production levels. To continue enhancing productivity for the remaining mature reservoirs, drilling decision-makers could no longer rely on traditional balanced or overbalanced methods of drilling. Derived from conventional air drilling, underbalanced drilling is increasingly necessary to meet today’s energy and drilling needs. While more costly and extreme, underbalanced drilling can minimize pressure within the formation, increase drilling rate of penetration, reduce formation damage and lost circulation, making mature reservoirs once again viable and more productive. To further explain this essential drilling procedure, Bill Rehm, an experienced legend in drilling along with his co-editors, has compiled a handbook perfect for the drilling supervisor. Underbalanced Drilling: Limits and Extremes, written under the auspices of the IADC Technical Publications Committee, contain many great features and contributions including: Real case studies shared by major service companies to give the reader guidelines on what might happen in actual operations Questions and answers at the end of the chapters for upcoming engineers to test their knowledge Common procedures, typical and special equipment involved, and most importantly, the limits and challenges that still surround this technology