Due to specific reservoir features such as high skin levels and poor petrophysical properties, a common activity applied in order to reduce skin levels, and increase well productivity index, is hydraulic fracturing operation; this formation stimulation activity, use generation of preferential channels of high conductivity, in order to improve these reservoir features.
Mechanical properties play a relevant role, during a successful fracturing job, planning and execution. Geomechanical parameters are valuable information, in order to select the most convenient intervals, to perform the fracturing job, and estimate the theoretical fracturing height results. Additional tools are essential in order to evaluate hydraulic fracture effectiveness; these tools will provide important information, related to fracture height, containment and complexity.
This paper presents the application of differential cased hole shear anisotropy (DCHSA) methodology, in Chichimene and Castilla Colombian fields, where hydraulic fracture height was determined, based on acoustic logs information. By determining hydraulic fracture height, mechanical barriers can be identified, in some cases these barriers can be acting containing the fracture growth, and planning of following fracture jobs, can be optimized along field. Using differential cased hole shear anisotropy (DCHSA) methodology, a better understanding of post stimulation production results can be obtained, this information helps to reach better calibration of existing geomechanical model, and fracture design can be optimized, in order to improve fracturing planning, for better well production and field development optimization.