Geometric completion designs proved ineffective in heterogeneous rock
The liquids-rich Wolfcamp shale play in the Permian basin has high
production potential. However, its heterogeneous rock properties, high
pressure, and high clay content have often led to ineffective stimulation
treatments. After geometric completion designs yielded limited success, Clayton
Williams Energy, Inc. partnered with Schlumberger to create a tailored
completion design based on the mechanical properties of the rock.
Comprehensive log measurements enhanced completion strategy
Because of the laminated, heterogeneous nature of the shale, log
measurements are critical for effective stimulation treatments. Petrophysical
and mechanical rock properties were measured along the lateral, using ThruBit
logging services, to acquire a full suite of wireline logs through the bit. The
data—including porosity, resistivity, Poisson’s ratio, and
Young’s modulus—were used to calculate in situ stress. Mangrove
stimulation design then selected the optimal perforation intervals based on the
computed stresses.
