GeomechanicsCornerBlog

GeomechanicsCornerBlog

Evolution of Earthquakes in Alberta: The Role of Hydraulic Fracturing and the Possibilities for Risk Mitigation

Earthquakes in Alberta and their possible relationship to subsurface operations such as hydraulic fracturing and waste disposal have made a lot of news over the past few years. The figure below shows the location and time distribution of 2,225 AB ...
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Depletion-induced Hazards and Risks and Their Management

By influencing the mechanical character of a field, production can result in one or some of the hazards shown below in red boxes. These hazards can lead to different socio-political, environmental, health and safety, and economic risks. Let's take a ...
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Geomechanics and Data Analytics: Bridging between ISIP and Geology

ISIP values are favoured by many in the industry because they are accessible and relatively easy to measure. Nevertheless, there are still questions on the nature of ISIP and its relation with geological and operational parameters. What is briefly shared ...
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PetroGem Toolbox, An Interactive Geomechanics Platform Available for Everyone

PetroGem Toolbox (Interactive Geomechanics Platform) is a complementary product developed and released by PetroGem Inc. to promote education and practice of geomechanics in petroleum industry. The first release of the product includes an interactive tool for classical hydraulic fracturing analysis ...
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Duvernay Keeps Pushing Boundaries Of Conventional Geomechanics

At least in some regions, I like to think of the Duvernay Formation as a half-asleep mountain lion that wildly roars back with a steaming breath and trembles the earth beneath when awakened. The aggressive/sensitive behaviour of this formation during ...
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Biot’s Coefficient: A Highly Undervalued Geomechanical Parameter

Recently, we reviewed about 90 geomechanical lab reports (from different labs, different formations, different producing companies) containing extensive measurements of all different sorts of mechanical rock properties and we could not find even a trace of Biot’s coefficient measurement. Due ...
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Two PetroGem Presentations on Geomechanics at Geoconvention 2017

PetroGem Inc. will present two talks on geomechanics at the coming Geoconvention 2017 next week. One of the talks (Tuesday May 16th, 10:40-11:05am, Room:Telus 104-106) discusses a potential mechanism that might be responsible for the observed seismicity induced by hydraulic fracturing and ...
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Reservoir Containment Assessment and Its Dynamic Nature

Synopsis: In many cases, reservoir containment and caprock integrity assessment is considered as a one-time requirement for proving the safety of a subsurface project while it is important to remember that such assessments are dynamic processes that should continue during the entire life of ...
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Ethics of Geomechanics: A Thriving Discipline and Its Growing Responsibility

Access the pdf version of the article here. During the last two decades, reservoir geomechanics has been showered with attention from petroleum industry, academia and regulatory institutions mainly because modern technologies, new perspectives and economic opportunities have led to exponential ...
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Geomechanics of Compressibility – Part III-Different Compressibility Coefficients and Their Applications

Read the first part of this series here. Read the second part of this series here. As discussed, the common concept of compressibility in geomechanics has been developed to study the changes in either of bulk volume (Vb) or pore volume (Vp) of rocks ...
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Geomechanics of Compressibility – Part II: Drained versus Undrained

Read the first part of this series here. Some Basics The Four Main Parameters: The common concept of compressibility in geomechanics has been developed to study the variations in either of bulk volume or pore volume of rocks in response to variation in confining ...
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Geomechanics of Compressibility – Part I: Why Is It Important?

After encountering frequent misunderstandings of rock compressibility and its applications, I decided to write a series of posts on 'geomechanics of compressibility' to explain its rock mechanical definition, its different types, methods of compressibility measurement and their differences and the parameters affecting this property ...
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A Primer on the Geomechanics behind Fracturing Pressure Curves

PDF version of this article: A Primer on the Geomechanics behind Fracturing Pressure In this post, I will break an idealized pressure curve (like what is recorded during hydraulic fracturing or pressurize fracturing tests) in different segments and explain the geomechanics behind ...
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Curving and Re-orientation of Hydraulic Fractures

What do we know about the geometries of hydraulic fractures? Are they really as simple as the straight planes we usually assume in our reservoir simulations and fracture designs? What factors influence their geometries? What are the geomechanical mechanisms behind geometry complexities? How ...
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Challenges of Coupled Geomechanical Modeling: II. Connecting Different Worlds

We may prefer to think different modules in coupled models are like matching pieces of a jigsaw puzzle and, by coupling, we are just fitting them to figure out the big picture. In reality, this is not probably the most accurate ...
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Two CDL Talks and Papers on Geomechanics at URTeC 2015, San Antonio.

In less than two weeks, at URTec 2015 in San Antonio, I will be presenting two papers on geomechanics of the Duvernay Formation based on the Canadian Discovery's study on this play. The papers provide comprehensive information on different geomechanical components, workflows and ...
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Challenges of Coupled Geomechanical Modeling: I. Stress Initialization

Reservoir-scale models usually integrate different physics like rock mechanics, multi-phase fluid flow, heat transfer, fracture mechanics and sometimes geochemistry and geophysics. Considering all these physics at the same time and solving their filed equations simultaneously (fully-coupled modeling), if possible, seems to ...
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Integration of Data and Disciplines for Unconventional Plays: Geomechanics, A Good Spot to Build A Junction

The emergence of unconventional plays has been so rapid during the last decade that, despite tremendous progresses, the science of petroleum engineering, which has been initially developed to treat conventional plays, has not had enough time to catch up and provide ...
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Methods for Determining Stress Orientations – Montney and Doig Examples

Last week, we published a Geomechanics Insight article in Discovery Digest on different methods of stress orientation characterization. The article reviews the cons and pros of different methods and gives examples for the most practical ones. These examples include using image logs, ...
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CDL Duvernay Studies in Geoconvention 2015

Geoconvention 2015 will be in town soon and we will be proudly presenting some of the workflows, methodologies and conclusions from our integrated geomechanical study of the Duvernay Formation, a fast-growing and attractive unconventional play in Alberta. This study is a part of The ...
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The Delicate Matter of Rock Brittleness; Part II: The Role of Elastic Properties

Find the Complete PDF version of this series here: The Delicate Matter of Rock Brittleness There’s something brittle in me that will break before it bends.     (Mark Lawrence, Prince of Thorns) Considering the definition of rock brittleness discussed in ...
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Integrated Geomechanical Characterization, CDL Style.

Canadian Discovery Ltd. has recently made one of our Duvernay geomechanics posters publicly available through its Discovery Digest Journal website . This poster is an example of the CDL's integrated geomechanical characterization workflow for unconventional reservoirs applied to a specific well in the Kaybob Area, Alberta ...
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The Delicate Matter of Rock Brittleness; Part I: A Rock Mechanical Perspective

Find the Complete PDF version of this series here: The Delicate Matter of Rock Brittleness Her reputation is no less brittle than it is beautiful.    (Jane Austen, Pride and Prejudice) It should not surprise us that oil producers would appreciate ...
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A Tribute to UTF: An Example of Success

The cover article of the September issue of Oilsands Review has been dedicated to the memory of UTF (Underground Test Facility) that was recently sealed forever by thousands of meters of concrete. Probably for a long time, UTF's story remains a great example of government investment ...
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Application of Geophysical Data for Geomechanical Studies: A Critical Review

Preface: If we pass two weeks or so at our office without ever talking about the validity of handling geomechanical characterization merely by geophysical methods, I would consider it as an especial occasion. My alibi to this statement is a recent article ...
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