Geomechanics Corner

Mehrdad Soltanzadeh, PetroGem Inc.

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Blogroll

BC Hydro worried fracking-created earthquakes a danger to northern dams Internal documents show B.C. Hydro officials have had concerns since at least 2009 that earthquakes triggered by fracking are a potential risk to its Peace River dams.
Drilling-induced earthquakes may endanger millions in 2016, USGS says
Video: Update on Hydraulic Fracturing & Regulation of Oil Field Practices Presented at the 2015 Vail Global Energy Forum by Mark Zoback (moderator), Jim Brown, Fred Krupp and Dave Stover.
Statistics Tie Water Injection to Earthquakes, But Root Causes Remain Murky
Drillers’ Situation Awareness model identifies key cognitive skills needed to be a good driller
Video: The Science of Shale Gas – Dr. Anthony R. Ingraffea, Ph.D, P.E. The Latest Evidence on Leaky Wells, Methane Emissions and Implications for Policy
Provinces must do more to prevent fracking-induced earthquakes: expert

Geomechanics Column

Have you ever tried to define something that you have spent a good part of your life on understanding and exploring its details in just one short sentence? If you have, you can understand that it is not an easy job because you need to be abstract and complete simultaneously. Last time that I tried to find an inclusive while simple definition for geomechanics (and everything it deals with) I ended up with this sentence: "Geomechanics studies the mechanical response of rocks to the events that disturb their initial state." The main three elements of this definition are: (i) An 'initial state' defined by in-situ stresses and ambient pore pressure and temperature. (ii) A 'disturbing event' that can be either natural (i.e., tectonic movement, magma flow, fluid flow, hydrocarbon generation, etc.) or human-induced (examples from petroleum industry are drilling, completion, fracturing, production and injection and thermal operations), and (iii) Rock's response to the disturbance: how it deforms (constitutive behaviour models) and how it fails (failure criterion) when initial state changes. Almost all the work done in all different geomechanical studies are about characterizing these three elements though sometimes it may seem difficult to identify them separately as they are usually intertwined.

Recent Posts

Geomechanics Corner Has Moved
Biot’s Coefficient: A Highly Undervalued Geomechanical Parameter
Two PetroGem Presentations on Geomechanics at Geoconvention 2017
Reservoir Containment Assessment and Its Dynamic Nature
Ethics of Geomechanics: A Thriving Discipline and Its Growing Responsibility
Geomechanics of Compressibility – Part III-Different Compressibility Coefficients and Their Applications
Geomechanics of Compressibility – Part II: Drained versus Undrained
Geomechanics of Compressibility – Part I: Why Is It Important?
A Primer on the Geomechanics behind Fracturing Pressure Curves
Curving and Re-orientation of Hydraulic Fractures
Challenges of Coupled Geomechanical Modeling: II. Connecting Different Worlds
Two CDL Talks and Papers on Geomechanics at URTeC 2015, San Antonio.
Challenges of Coupled Geomechanical Modeling: I. Stress Initialization
Drilling-Induced Fractures in Your Hands! A Great Educational Tool for Geomechanics.
Integration of Data and Disciplines for Unconventional Plays: Geomechanics, A Good Spot to Build A Junction
Methods for Determining Stress Orientations – Montney and Doig Examples
CDL Duvernay Studies in Geoconvention 2015
The Delicate Matter of Rock Brittleness; Part II: The Role of Elastic Properties
Integrated Geomechanical Characterization, CDL Style.
The Delicate Matter of Rock Brittleness; Part I: A Rock Mechanical Perspective
A Tribute to UTF: An Example of Success
Application of Geophysical Data for Geomechanical Studies: A Critical Review

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