Abstract
Elasticity in the Woodford is Anisotropic in nature. From the upper woodford, middle, and lower sections, the Youngs modulus varies. In this case, two properties are mostly common: Ductility and Brittleness. This paper will focus on these rock properties, their effect on hydraulic fracturing and how to better manage them.
The upper woodford is mostly brittle (see fig. 2), with poisons ratio ranging from 0.28 to 0.4. Hydraulic Stimulation in this area has posed little to no problems. Pads are cut short during treatments since loadings are moderate in the breaking of this section. On the other hand, the middle to lower section of this shale play exhibits moderate to high ductility respectively. Well trajectories that have landed in this section of the woodford have posed difficulties in hydraulic stimulation with little to no breakdowns, longer pump times and little to no proppant placement.
