michael fay vp, software development. well production forecasting requirements for efficiency, the...
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Mida-QRC For Unconventional Well Analysis
Michael FayVP, Software Development
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Well Production Forecasting RequirementsFor efficiency, the method should be simple (e.g. no
simulation or complex analytical procedures; standalone tool; few steps)
Analysis must be rigorous: based on proven theoryIt should provide useful information: production forecast,
EUR, well drainage area, including a direct measure of the reservoir quality of that drainage area
It’s possible to do all three, and beQuickReliableComprehensive
9/10/2015MIDA-QRC For Unconventional Well Analysis
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Multi-Fractured Horizontal Well: Plan View
… from Nobakht and Clarkson (2011)
9/10/2015MIDA-QRC For Unconventional Well Analysis
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Production Model
1
q
t
Transient (linear) phase
Depletion (hyperbolic)
phase
1'm t b
q
elft
9/10/2015MIDA-QRC For Unconventional Well Analysis
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linear control points
Shale Gas Example (MIDA-QRC screen)
(Barnett, East Newark, Johnson Co.)
production data (green)
telf (user-adjustable)
forecast (thick red curve)
m = .000063
output to spreadsheet
linear control points
9/10/2015MIDA-QRC For Unconventional Well Analysis
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Forecast Output: Excel .CSV
9/10/2015MIDA-QRC For Unconventional Well Analysis
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Same Model, Applied to an Oil Well
(Bakken, North Dakota)
9/10/2015MIDA-QRC For Unconventional Well Analysis
Scratchpad for calculating telf
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telf and Drainage Area are Related
9/10/2015MIDA-QRC For Unconventional Well Analysis
telf in terms of Ad :
Ad in terms of telf :
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Using Ad to Calculate telf (Part 1)
9/10/2015MIDA-QRC For Unconventional Well Analysis
Shut-in Pressure (Pi)Bottom-hole producing pressure (Pwf)Formation Volume
Factor (Bi) Porosity (φ)
Compressibility (Cti)Height (h)
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Using Ad to Calculate telf (Part 2)
9/10/2015MIDA-QRC For Unconventional Well Analysis
If you know the Area, you can calculate telf
You can also perform “what if” calculations for various assumptions about either Ad or telf
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telf Fed Back into the Forecast
(Bakken, North Dakota)
9/10/2015MIDA-QRC For Unconventional Well Analysis
telf’s position can be the
result of the scratchpad calculation
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m (slope) is a Measure of Reservoir Qualitym is the slope of the linear phase:
Per Wattenbarger et al. 1998 (Gas well)
1'm t b
q
315.4 1 1
pi pwf fg t i
T
p pcm
kxh
initial shut-in pressure
bottomhole producing pressure
fracture half-length
permeability
porosity
temperature
viscosity
compressibility
height
9/10/2015MIDA-QRC For Unconventional Well Analysis
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m is Correlated to Productivity
80 100 120 140 160 180 200 220 240 260 2800
2
4
6
8
10
12
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Mountrail Co., Bakken, Parshall Area, 2009 Wells, Operator B, T151N, R90W, R2 = -0.894
4-year Cumulative Oil (MB)
m-s
lope
(10
-4)
9/10/2015MIDA-QRC For Unconventional Well Analysis
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Application: An Iso-m-Slope Map Can Identify “Sweet Spots”
(Neal and Mian, SPE 15432, Early Time Tight Gas Production Forecasting Technique Improves Reserves and Reservoir Description, 1989)
9/10/2015
Isoslope m Map, Muddy J Formation, Wattenberg Field, Weld County, CO
MIDA-QRC For Unconventional Well Analysis
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Try MIDA-QRC for Free!Visit www.mannonassociates.com and fill out the
Contact FormFull MIDA-QRC functionality for 21 days
Input Formats: Lasser, IHS DMP2, IHS 98C, or…Read the White Paper (electronic handout, web site)
for detailed examplesGot more complete data? We’ll help you analyze your
wells… Questions?
9/10/2015MIDA-QRC For Unconventional Well Analysis