Michael Fay VP, Software Development

Well Production Forecasting Requirements For 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 theory It 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 be Quick Reliable Comprehensive 9/10/2015 2MIDA-QRC For Unconventional Well Analysis

Multi-Fractured Horizontal Well: Plan View … from Nobakht and Clarkson (2011) 9/10/2015 3MIDA-QRC For Unconventional Well Analysis

Production Model Transient (linear) phase Depletion (hyperbolic) phase 9/10/2015 4MIDA-QRC For Unconventional Well Analysis

linear control points Shale Gas Example (MIDA-QRC screen) (Barnett, East Newark, Johnson Co.) production data (green) t elf (user- adjustable) forecast (thick red curve) m = output to spreadsheet linear control points 9/10/2015 5MIDA-QRC For Unconventional Well Analysis

Forecast Output: Excel.CSV 9/10/2015 6MIDA-QRC For Unconventional Well Analysis

Same Model, Applied to an Oil Well (Bakken, North Dakota) 9/10/2015 7MIDA-QRC For Unconventional Well Analysis Scratchpad for calculating t elf

t elf and Drainage Area are Related 9/10/2015 MIDA-QRC For Unconventional Well Analysis8 t elf in terms of A d : A d in terms of t elf :

Using A d to Calculate t elf (Part 1) 9/10/2015 MIDA-QRC For Unconventional Well Analysis9 Shut-in Pressure (P i ) Bottom-hole producing pressure (P wf ) Formation Volume Factor (B i ) Porosity (φ) Compressibility (C ti )Height (h)

Using A d to Calculate t elf (Part 2) 9/10/2015 MIDA-QRC For Unconventional Well Analysis10 If you know the Area, you can calculate t elf You can also perform “what if” calculations for various assumptions about either A d or t elf

t elf Fed Back into the Forecast (Bakken, North Dakota) 9/10/ MIDA-QRC For Unconventional Well Analysis t elf ’s position can be the result of the scratchpad calculation

m (slope) is a Measure of Reservoir Quality m is the slope of the linear phase: Per Wattenbarger et al (Gas well) initial shut-in pressure bottomhole producing pressure fracture half- length permeability porosity temperature viscosity compressibility height 9/10/ MIDA-QRC For Unconventional Well Analysis

m is Correlated to Productivity 9/10/ MIDA-QRC For Unconventional Well Analysis

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/ Isoslope m Map, Muddy J Formation, Wattenberg Field, Weld County, CO MIDA-QRC For Unconventional Well Analysis

Try MIDA-QRC for Free! Visit and fill out the Contact Formwww.mannonassociates.com Full MIDA-QRC functionality for 21 days Input Formats: Lasser, IHS DMP2, IHS 98C, or… Read the White Paper (electronic handout, web site) for detailed examples Got more complete data? We’ll help you analyze your wells… Questions? 9/10/ MIDA-QRC For Unconventional Well Analysis