Abstract
This paper will evaluate the efficiencies of completion methods in a South Texas field utilizing the latest techniques in post fracture production analysis. Stimulation effectiveness for each frac stage in ten multi-zone wells is evaluated.
Effective values for reservoir and fracture parameters including porosity, permeability, propped fracture half-length, fracture conductivity and fracture face skin will be derived using production analysis techniques and will be compared for the different completion methods employed. The holistic model will incorporate the geological, petro-physical properties of the formation and production logging data.
Actual stimulation and production data from ten wells in the same area are used in this analysis. Five of the wells were completed in single-stage fracture stimulation across multiple perforated intervals. Five wells were completed with two-stage fracture stimulations across multiple perforated intervals. The multiple layer fracturing technique was utilized in all wells. The study will derive the effective reservoir and fracture parameters using production allocation for each interval in the multiple interval wells.
This paper will compare the different completion techniques using this methodology and will discuss a predictive model for future stimulation work in this area. This methodology will also help in identifying under-stimulated zones in existing wells that may be candidates for re-fracturing.
