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

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Multi-Fractured Horizontal Well: Plan View

… from Nobakht and Clarkson (2011)

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Production Model

1

q

t

Transient (linear) phase

Depletion (hyperbolic)

phase

1'm t b

q

elft

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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

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Forecast Output: Excel .CSV

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Same Model, Applied to an Oil Well

(Bakken, North Dakota)

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Scratchpad for calculating telf

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telf and Drainage Area are Related

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telf in terms of Ad :

Ad in terms of telf :

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Using Ad to Calculate telf (Part 1)

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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)

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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)

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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

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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)

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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)

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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