Operational Geomechanics – A Rock-Based Science for Environmental, Energy, and Engineering Applications

54.0064.00

“OPERATIONAL GEOMECHANICS” is a new concept coined by the author. It encompasses all aspects of rock stress and rock failure in the lithosphere, both artificially induced and naturally occurring. It applies to a full range of depths from surface/near surface to extremely challenging depths and environments.

Thus, it presents the principal tools and tests relevant to the full array of geomechanical applications for assessing and accessing the Earth’s energy, mineral and water resources, as well as for environmental probing, conservation, natural hazards, and waste disposal. As such the book is a challenge to the traditional approach of compartmentalising geomechanics into discrete topics and instead presents a wholistic geomechanical workflow.

Clear
Publisher EAGE
Language ENGLISH
Publish year 2018

Description

“OPERATIONAL GEOMECHANICS” is a new concept coined by the author. It encompasses all aspects of rock stress and rock failure in the lithosphere, both artificially induced and naturally occurring. It applies to a full range of depths from surface/near surface to extremely challenging depths and environments.

Thus, it presents the principal tools and tests relevant to the full array of geomechanical applications for assessing and accessing the Earth’s energy, mineral and water resources, as well as for environmental probing, conservation, natural hazards, and waste disposal. As such the book is a challenge to the traditional approach of compartmentalising geomechanics into discrete topics and instead presents a wholistic geomechanical workflow involving:

1. The characterization of the mechanical and stress properties of the rock mass targeted in environmental, engineering and energy operations of human activities and natural hazards such as earthquakes.
2. The timely prediction of instability risks to both infrastructure and drill holes associated with the above
activities.
3. Recommending, designing and conducting preventative precautions for the identifiable instability risks, and remedial steps to mitigate and/or stop subsequent instability damage.

The ultimate objectives of OPERATIONAL GEOMECHANICS are saving time, costs and lives, and in that context, the book discusses the building blocks of the topic in terms of: definitions of geomechanical/rock mechanical parameters; tools; analysis; and interpretations utilized particularly in operations involving drilling/boring operations relevant to all the above engineering, energy and environmental applications. In the final part of the book the
author gives examples of key drilling-related applications.

The book is enriched by the author’s industrial experience which spans more than three decades and will be a suitable text book for undergraduate and graduate students and a practical guide to professionals and managers alike working on projects for which operational geomechanics plays a vital role.

Contents

1  Force, stress & strain
1.1.  Force
1.2.  Stress
1.3.  Strain (Deformation)

2  Rock fractures, their statistical, geometric, and kinematic categories
2.1.  Rock fractures
2.2.  Fracture mechanics
2.3.  Modes of crack surface displacement in the process one
2.4.  Kinematics (opening) mode of fractures
2.5.  Causative stress regimes and resultant suite of fractures
2.6.  Scale of fractures
2.7.  Fracture clustering
2.8.  Fractures associated with major host structures

3  Borehole-scale tools: Borehole images
3.1.  Definitions of borehole imaging, and borehole images
3.2.  Borehole imaging categories according to tool conveyance
3.3.  Image logging categories according to their acquisition time relative to borehole drilling
3.4.  Image logs categories according to the measured property type
3.5.  Borehole image types according to the logging environment
3.6 Image logs’ categories according to their quality
3.7.  Image logs processing
3.8.  Image logs delivery format

4  Borehole-scale tools: Borehole rock samples
4.1.  Full-diameter core
4.2.  Sidewall cores
4.3.  Drill cuttings

5  Rock mechanical characterization
5.1.  Rock mechanics
5.2.  Historical background
5.3.  Applications of rock mechanics
5.4.  Methods of laboratory-based rock mechanical testing
5.5.  Laboratory-acquired mechanical properties of rocks
5.6.  Mechanical properties of rocks
5.7.  Upscaling of laboratory measured static elastic moduli

6  Assessment of in situ stress magnitude
6.1.  In situ stresses
6.2.  In situ stresses (definition)
6.3.  The vertical in situ stress σv
6.4.  The horizontal in situ stresses
6.5.  Estimation of formation stresses using borehole sonic data

7  Assessment of in situ stress orientation
7.1.  Estimation of in situ stress orientation from borehole data
7.2.  Estimation of in situ stress orientation from field scale data

8  Operational geomechanics: application areas and sources of borehole instability risks
8.1.  Definition
8.2.  Application areas of operational geomechanics
8.3.  Borehole instability causes
8.4.  Borehole instability symptoms

Additional information

WeightN/A
DimensionsN/A
Author

Publisher

Language

ENGLISH

Year of publication

2018

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