Meeting Information
|
"Petrophysical Interpretation of
Electromagnetic Measurements in Clay- and Pyrite-Bearing
Formations: Toward Improved Water Saturation Estimates"
Siddharth Misra
University of Oklahoma
Subsurface electromagnetic (EM) measurements, namely
galvanic resistivity, EM induction, EM propagation, and
dielectric dispersion measurements, in shaly sands,
sand-shale laminations, conductive-mineral-rich shales,
and organic-rich mudrocks exhibit directional and
frequency dispersive characteristics, primarily due to
the effects of electrical conductivity anisotropy and
interfacial polarization phenomena. Existing
petrophysical interpretation techniques for laboratory
and subsurface EM measurements do not account for the
effects of dielectric permittivity, dielectric
dispersion, and dielectric permittivity anisotropy
arising from the interfacial polarization of clay
minerals, clay-sized particles, and conductive minerals.
A non-contact and non-invasive, laboratory-based EM
induction apparatus was developed and employed to study
the effects of interfacial polarization of conductive
minerals on the effective conductivity and permittivity.
A newly developed electrochemical model, referred to as
the PS model, processed the measured effective EM
properties of geological formations to estimate the true
conductivity and permittivity of hydrocarbon-bearing
host media free from the effects of clay minerals,
clay-sized particles, and conductive minerals. The PS
model predictions successfully reproduced several
laboratory measurements of multi-frequency complex
electrical conductivity of fluid-saturated mixtures in
the frequency range of 100 Hz to 10 MHz. The model
indicates high sensitivity of subsurface EM measurements
to the electrical properties, shape, volumetric
concentration, and size of the inclusion phase, and to
the conductivity of pore-filling electrolyte.
A recently published well log shows that the
conventional interpretation of a single frequency EM
measurement in pyrite-bearing mudrock and shale
formations, containing clays and conductive minerals,
doesn’t lead to accurate water saturation values due to
the effects of frequency dispersion and interfacial
polarization. However, a joint interpretation of EM
induction, EM propagation, and dielectric dispersion
logs generated the true conductivity and true
permittivity, which can then be interpreted using
conventional interpretation techniques to obtain
improved water saturation estimates.
|
About the Speaker
Siddharth Misra is Assistant Professor in Mewbourne
School of Petroleum and Geological Engineering. He holds
Ph.D. and M.S.E. in Petroleum Engineering from the
University of Texas at Austin. Dr. Misra completed his
B.Tech. degree in Electrical Engineering from the Indian
Institute of Technology Bombay, India. From 2007 to
2010, he worked for Halliburton Energy Services as a
Wireline Field Engineer. In his doctoral research, Dr.
Misra collaborated with Schlumberger to develop a
multi-frequency inductive conductivity tensor apparatus
to estimate the electromagnetic properties of geological
whole core samples. Using that laboratory apparatus, he
investigated the effects of pyrite and graphite on
electromagnetic induction measurements. He also
developed a wideband mechanistic model for electrical
conductivity and dielectric permittivity interpretation
in formations containing clays, inclusions, and
conductive minerals.
|
From the Vice President - Technology
|
|
Katerina Yared (QEP) - Filling in
Our Spring workshop is fast approaching and we are
looking forward to some great talks and discussions on
one of the most vigorous basins in the US: The Midland
basin. Bob and I have prepared an exquisite
line-up of talks thanks to the many speakers that
accepted our invitation to come talk to us.
The line-up is as follows:
- Robert Baumgardner, Texas Bureau of
Economic Geology
Early Permian basinal mudrocks in the
Southern Midland basin – foundation for the
Wolfberry Play
- Reed Olmstead, IHS Energy
Wolfcamp Midland: Can the trajectory
continue?
- Michael Holmes, Digital Formation Inc.
Petrophysical analysis of the Wolfcamp
Shale interval
- Tim McGinley, Laredo
Comprehensive Integrated Petrophysical
Analysis That Enhances Performance of a Wolfberry
Play
- Kent Newsham, Oxy
Title: TBD
- Randy Miller, Core Labs
Core-Log Integration Techniques for the
Development of a Petrophysical Model for the
Wolfcamp, Midland Basin
- Anyela Morcote-Rios, Ingrain
An Integrated Digital Rock Physics Method
for Wolfcamp Formation Core Characterization
- Milly Wright, Chemostrat
Understanding how XRF and FTIR data can be used to
model petrophysical properties in cutting samples –
examples from lateral wells in the Wolfcamp
Formation
I hope you can come join us for our DWLS Spring
Workshop about the Midland Basin on April 21st at our
standard venue place, the Colorado School of Mines.
Doors open at 7:30am.
P.S.: As you might have heard during our last Lunch
and Learn I am stepping in for Bob Cluff temporarily as
he needs to focus on getting better. Bob will be out of
pocket for hopefully just a short time.
Get well soon, Bob!
|
|
From a Director (Monthly Beverage Sponsorship,
and Social Events)
|
|
Bryan Page (Weatherford)
|
|
From the Past President
|
|
Katerina Yared (QEP) - Filling in
Dear DWLS members, as acting Past-President it is part of my
duty to recruit the next generation of the DWLS board.
There is no better time than now to volunteer for the
DWLS board and keep connected with the oil and gas
industry. Become actively involved and experience a very
rewarding and educational organization. We are a strong
community and we hope you can help us keep our members
up-to-date and informed. This last year has been tough
for everyone. You can help do your part for all good
reasons.
If you are interested in joining the DWLS board
please come talk to me at our meetings or email me: Past_President@dwls.spwla.org!
The current board has done a great job in keeping us
informed and connected all through the year despite the
hardships in their lives. I want to thank them all again
for their time and for a job well done! Thank you!
|
|
|
Meeting Details
|
Due to the difficult times, the Board of
Directors has reluctantly decided to put the
monthly free beverages program on hiatus.
We will still accept sponsorship if you
would like to offer it, but we will no
longer be spending time and effort in an attempt
at finding willing sponsors.
|
11:20 am - 1:30 pm
|
Wynkoop Brewing Company
(tell
me how to get there)
|
$20 per person
$25 at the door
(space permitting)
|
Must be made on-line at
http://dwls.spwla.org
before 5 PM on Thursday,
. Or click below to go directly to PayPal. |
|
Please note that the room has a maximum capacity
of about 100 people. We have generally allowed walk-ins
in the past. However, if we approach this limit
with paid reservations, walk-ins will be turned
away!
|
Cancellations must be made no later than 5 PM
the Friday prior to the talk, or you will be responsible
for the full cost of the luncheon!
or contact Lisa Gregor at 303-770-4235.
Our full cancellation/wait list policy is available on the
website.
|
"Multi detector
/ multi-tool method for leak detection in wells
in mature fields"
Luis Quintero
Halliburton
|
|
Calendar of Events
|
Click to view the calendar on the web.
|
Chapter Statistics
|
Statistic
|
This Year
|
3-Year
Ave.
|
# of Active
members |
377 |
345 |
# that are
New members |
8 |
27 |
# that are
Students |
11 |
9 |
# that are
Lifetime Members |
308 |
275 |
September luncheon
meeting attendance |
80 |
81 |
October luncheon
meeting attendance |
83 |
63 |
November luncheon
meeting attendance |
75 |
75 |
December holiday party attendance |
36 |
59 |
January luncheon
meeting attendance |
58 |
97 |
February luncheon
meeting attendance |
57 |
88 |
March luncheon
meeting attendance |
|
87 |
April luncheon
meeting attendance |
|
71 |
May luncheon
meeting attendance |
|
74 |
June
summer social attendance |
|
31 |
|
|