Notional Field Development Final Report - EBN

EBN Notional Field Development Plan
capabilities, uses less base polymer resulting in much higher regained conductivity with low gel residue
in the proppant pack.
Table 3-2, Fracture Model Inputs is a summary of the inputs used for the fracture design modeling.
Table 3-2, Fracture Model Inputs
Casing:
177.8 x 114.3 mm (7” 32.0 lb/ft x 4 ½”, 13.5 lb/ft)
Perforations (Posidonia): 3100 m TVD (10,170 ft), 48 perfs w/10 mm (0.39”)
Perforations (Aalburg): 3350 m TVD (10,990 ft), 48 perfs w/10 mm (0.39”)
Permeability:
100 nD
Total Leakoff, Ct:
0.00610 cm/min1/2 (0.0002 ft/min1/2)
Min. Conc. for Fracture:
2.44 kg/m2 (0.5 lbm/ft2)
Fluid:
Sirocco 30 lb/Mgal
Proppant:
20/40 RC (Atlas PRC), 30/50 RC (Atlas PRC)
Stress Gradient*:
0.105 bar/m (0.517 psi/ft)
Closure Pressure (Posidonia):
328.2 bar (4760 psi)
Closure Pressure (Aalburg):
357.1 bar (5180 psi)
Fracture interaction
Active
DFN: Natural fracture spacing
dy= dx= dz = 7.62 m (25 ft)
DFN: Proppant distribution
Uniform
*The stress gradient was obtained honoring log derived mechanical properties. However, the stress
values are lower than expected and lower that what is typically seen in other shale formations. These
values need to be confirmed and updated after the DFIT and log analysis is completed on the vertical
well.
The recommended pumping schedule for both Planar and Discrete Fracture Modeling Scenarios is
Table 3-3, Treatment Schedule for Fracture Design. The pad fluid is pumped during the first stage of the
treatment to create initial fracture geometry. The pad is followed by eight sets of 20/40 or 30/50-mesh
proppant slurry, helping to develop geometry, conductivity and fracture length. During these eight
stages of the treatment, the proppant is staged up from 1 ppg (119.83 kg/m 3 ) to 8 ppg (958.61 kg/m 3 ).
At the end of placing the slurry 17.413 m 3 of flush is pumped to clear tubulars of proppant. Each stage of
the treatment is designed for an average slurry rate of 7.15 m 3 /min (45 bpm). Total liquid volume per
stage is 477.34 m 3 (3000 bbls). Total proppant mass is 224,530 kg (495,000 lbs) per stage. This treatment
creates a maximum surface treating pressure of 291 bar (4221 psi), assuming the current stress gradient
of 0.105 bar/m (0.517 psi/ft).
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