Detailed data and cost-effective completion strategy needed
“Wolfbone” is the local name given to the Delaware
basin’s vertical wells with comingled production from the Wolfcamp and
Bone Spring intervals. Because the Wolfbone comprises multistacked conventional
and unconventional packages, the interval is characterized by highly
heterogeneous lithologies and formation properties.
To ensure the economic success of its Wolfbone campaign, Endeavor Energy
partnered with Schlumberger to characterize the reservoir and understand the
acreage’s spatial variability. Detailed completion and production
evaluation of the vertical well program would be critical in identifying and
ranking productive horizons for future horizontal well developments.
Schlumberger proposed an integrated strategy encompassing detailed reservoir
characterization, complex fracture modeling with Mangrove software, and HiWAY
channel fracturing technique.
Integrated workflow helped optimize well completion effectiveness
Schlumberger constructed oil shale montages using data from Platform
Express integrated wireline logging tool, ECS elemental capture spectroscopy
sonde, and CMR combinable magnetic resonance tool. This provided petrophysical
interpretations of the Wolfbone interval and improved identification of the pay
zones. Sonic Scanner acoustic scanning tool was also run on the subject wells
to derive anisotropic mechanical rock properties and stress models, which are
critical inputs for accurate hydraulic fracture simulations.
All available reservoir data was imported into Mangrove stimulation
design software to determine treatment staging, choose perforation placements,
and perform hydraulic fracturing simulations—optimizing fracture
treatment parameters. To address completion costs and fracture conductivity
concerns, the subject wells were treated with the HiWAY technique. A completion
and production analysis, which includes post-treatment fracture simulation,
production log analysis, rate transient analysis, and production history
matching, was performed on the subject wells, aiding the calibration of the
petrophysical and anisotropic stress models.