Transcript Channel Sand Reservoir Characterization Based on Features

Channel Sand Reservoir Characterization
Based on Features Identified From
Electrical Borehole Images
HEF Petrophysical Consulting Inc.
This presentation is entitled Channel sand reservoir characterizations based
on features identified from electrical borehole images: Example from the
lower cretaceous McMurray Formation, northeast Alberta, Canada.
Channel Sand Reservoir Characterization
Based on Features Identified from Electrical
Borehole Images: Example from the lower
Cretaceous McMurray Formation, northeast
Alberta, Canada
• Authors: Richard Shang, Kris Vickerman,
Susan Xu and Paul Heffernan
• Presenting: Kris Vickerman
Before I get going, I'd like to thank my co-authors at HEF
Petrophysical Consulting, Richard Shang, Susan Xu and Paul
Heffernan.
Acknowledgements
• Brian Rottenfusser of Redfoot Enterprises
Inc.
• Computalog
• Schlumberger of Canada
For further acknowledgements, I’d like to say that we were very lucky to
have had Brian Rottenfusser involved and impressed with this technique
because of his vast experience and knowledge in the field of tar sands core
interpretation. I’d also like to acknowledge computalog and schlumberger
whose imaging and interpretation techniques that will be employed in this
presentation as well as Gord Stabb of Durando Resources, John Cox, and
all the other people who were involved in this project who would rather
remain unnamed.
Outline
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Introduction
Objectives
Comparison of EMI and Core Images
SAGD Concerns
Sand Body Orientation
Example Well
Conclusions
Just to give you all an idea about where this presentation is going, here
is an outline of things to come. After some introductions into the
project background and objectives, I will discuss a comparison
between some electrical borehole images and some digital core photos,
I’ll then talk about some SAGD concerns, and about using the
established techniques of determining the sand body orientation from
computed dip data. Finally, I'll show a complete example well in the
tar sands environment and conclude.
Project Description
• 30 tar sands wells in the McMurray
Formation
• To be developed using steam assisted
gravity drainage (SAGD)
This 30 well project was drilled in the Cretaceous McMurray tar sands
formation in northeastern Alberta. The ultimate goal of the operators was to
produce the field using steam assisted gravity drainage or SAGD. Please
notice the SAGD diagram on the next slide, where there are two horizontal
wells, one placed over the top of the other.
Steam Assisted Gravity Drainage (SAGD)
The top well is used as an injector by pumping superheated steam into
the formation which liquefies the heavy tar sands oil enough that it
drains into the production wellbore, below. This project was an
interesting one because environmental concerns over caribou and
moose calving in the area forced a shortened season so innovative ways
to drill the year's quota of wells had to be found. Our solution to this
problem was to see if the wells could be logged with images rather than
resorting to the slower method of coring to obtain data. This will be
the main focus of the presentation.