Meeting Information
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"Using Advanced Logging Measurements to Develop
a Robust Petrophysical Model for the Bakken Petroleum
System"
Gary Simpson
Hess Corporation
The Bakken petroleum system (BPS) can be considered a
hybrid play because it is composed of both conventional
and unconventional elements. The conventional
aspects include the presence of separate reservoir
intervals (Scallion, Middle Bakken, Sanish and three
Forks) and source rock intervals (Lower Bakken and Upper
Bakken shales) along with more problematic intervals
(Basal Bakken). This is in direct contrast to most
unconventional shale plays, in which a single lithology
or stratigraphic interval comprises both the source rock
and reservoir. The unconventional aspects of the
BPS include very low permeability conventional reservoir
sections, as well as combined shale-rich source and
reservoir intervals. Additional complexity results
from stacked depositional environments with significant
variations in lithofacies, mineralogy, total organic
carbon (TOC), and rock textures ranging from highly
bioturbated to finely laminated.
Historically, development programs and petrophysical
analyses in the Bakken were centered on a volume of
shale calculated via deterministic models using triple
combo log data that were focused primarily on the Middle
Bakken reservoir. Production type-curves generated
from such analyses showed reservoir recovery factors
that were inconsistent with actual production data as
well as knowledge of the reservoir. Additionally,
rock mechanical properties used to model hydraulic
fracturing performance and real-time measurements of
microseismic events recorded during hydraulic fracturing
indicated fracture height growth that extended into
surrounding formations.
Based on these results, a series of science wells
were drilled, cored over the entire BPS and logged
extensively using advanced logging devices to better
understand the overall system. Results from these
wells provide a basis to refine production type curves
and to re-calculate stock-tank oil originally in place
(STOOIP). The formation evaluation program
consisted of conventional triple combo logs supplemented
with advanced downhole measurements including: (1)
tiraxial resistivity for thin-bed analysis; (2) nuclear
magnetic resonance for porosity, free fluid and kerogen
identification; (3) dielectric dispersion for water
saturation; (4) geochemical spectroscopy for mineralogy
and total organic carbon (TOC); and (5) dipole sonic for
dynamic rock properties. Petrophysical models were
developed using both deterministic and probabilistic
methods to integrate the measurements acquired for
analysis of porosity, saturation, and mineralogy, and
describing the hydrocarbon production potential of the
BPS more accurately. The advanced evaluation
results will enable the development of computation
models in areas of the basin where only minimal logging
suites such as triple combo logs exist as data.
Petrophysical models that encompass the entire BPS will
be the basis for updated STOOIP calculations that can be
used to revise production type curves and improve
confidence in estimated recovery factors that have
better agreement with measured production results.
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About the Speaker
Gary Simpson is a Senior Petrophysical Advisor
working for Hess Corporations in Houston since 2012.
He is a member of the Unconventional Resource Technology
team advising business unit asset teams on research and
development projects for unconventional reservoirs.
He has more than 36 years combined industry experience
working in service sector positions with Halliburton,
Computalog Inc. (now part of Weatherford), and Perf-O-Log
(now part of Schlumberger) and operating company
positions with Shell, ConocoPhillips and Forest Oil
Corporation. He is a member of the SPWLA and SPE.
Gary is a 1978 graduate from Texas A&M University.
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From a Director (Monthly Beverage Sponsorship,
and Social Events)
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Bryan Page (Weatherford)
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From the President
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Suzanne Heskin
Here comes fall! The kids are back in school and the
temperatures are cooling. Time for DWLS to get back in
gear. I hope everyone who attended the luncheon in
September enjoyed it, I heard great things about it.
Our VP-Technology has lined up more great speakers for
this fall, so let's keep meeting and learning. In
October we will host Gary Simpson from Hess, who spoke
to us at one of the workshops last year and was
fantastic. He will be discussing petrophysical models
of the Bakken, something sure to be of interest to many.
On a less serious note, be sure to enter our Fall
Social (it's not at Christmas this year) into your palm
pilot, black berry, smartphone, laptop, tablet, planner,
or your mental calendar. It'll be on Nov 3 at Marlowes. I think it'll be a great time to gather
socially, and it's coming up soon!
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From the Vice President - Technology
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Bob Cluff (The Discovery Group)
The board has decided to implement a significant
change with respect to how we plan and run our Fall and
Spring workshops. Traditionally, the board handoff is
made in May and the incoming VP Technology has to
immediately scramble to find a topic and speakers for
the Fall workshop. Unless the prior board made
significant progress on this before the handoff, this
tends to not work well considering the difficulty in
contacting people over the summer months and lining up
all the talks.
For 2015/16, we've decided to rotate the
responsibility by one workshop so the new VP Technology
is responsible for the Spring workshop and the following
year's Fall workshop. In my case, that means I will be
doing the Spring and Fall 2016 workshops. The 2015/16
board will have better input on the topics for both
workshops and we'll have the Fall topic decided along
with most if not all the speakers ready to go by May.
The next VP Technology will then execute the Fall
workshop and start planning the following Spring
workshop with the new board, and so forth. This means
we have to skip a workshop to get on the new schedule,
so we will NOT be having a Fall 2015 workshop. If there
ever has been a time where it is appropriate to skip
one, this is probably the year!
The topic for our Spring 2016 workshop will be
"Petrophysics of Midland Basin plays", with an emphasis
on the Spraberry-Dean-Wolfcamp plays in that basin. If
you have seen great talks you think would be
appropriate, please send me the speakers name and a
link. I'll be lining up the program starting in
October.
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From the Treasurer
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Iain Pirie (Schlumberger)
As of September 29, 2015
- Checking = $43,538.75
- Savings = $2,551.15
- Petty Cash = Closed Out
Donations:
The annual donation to the Salvation Army is a result
of donations collected from our members at the Christmas
social and matched by the DWLS. This year's contribution
was down slightly from that of the previous year's
donation of $570.00.
DWLS continues to enjoy a strong fiscal disposition
thanks to our strong membership support and well
attended short courses.
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Meeting Details
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Please thank
The Discovery Group
for sponsoring the free beverage tickets this month
(beer, wine or soda)!
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11:20 am - 1:30 pm
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Wynkoop Brewing Company
(tell
me how to get there)
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$20 per person
$25 at the door
(space permitting)
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Must be made on-line at
http://dwls.spwla.org
before 5 PM on Thursday,
. Or click below to go directly to PayPal. |
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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!
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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.
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"Subsurface
fluid characterization using downhole and core
NMR T1T2 maps combined with pore scale imaging
techniques (2015 SPWLA UUU)"
Margaret Lessenger
Newfield
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Calendar of Events
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Click to view the calendar on the web.
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Chapter Statistics
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Statistic
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This Year
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3-Year
Ave.
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# of Active
members |
370 |
345 |
# that are
New members |
3 |
27 |
# that are
Students |
11 |
9 |
# that are
Lifetime Members |
307 |
275 |
September luncheon
meeting attendance |
80 |
81 |
October luncheon
meeting attendance |
|
63 |
November luncheon
meeting attendance |
|
75 |
December holiday party attendance |
|
59 |
January luncheon
meeting attendance |
|
97 |
February luncheon
meeting attendance |
|
88 |
March luncheon
meeting attendance |
|
87 |
April luncheon
meeting attendance |
|
71 |
May luncheon
meeting attendance |
|
74 |
June
summer social attendance |
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31 |
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