The Eagle Ford Shale, as one of the most active unconventional reservoirs in the US, began heavy development in 2009. One of the attractive aspects of the Eagle Ford, which has heightened interest and helped to accelerate development, is substantial liquids production, along with solution gas. However the resultant multiphase fluid production, along with reservoir heterogeneity that is typical of most unconventional reservoirs, adds complexity and risk to development, especially for completions.
One technique that has the potential for reducing risk is learning from historical completion trends. Even though the Eagle Ford play is quite new, more than 4,000 horizontal wells have been drilled and all have been hydraulically fractured. The resultant large and growing data resource invites data mining to uncover trends and insights.
The ground work for this case study was laid first in SPE 149258 (2011) and then in SPE 158501 (2012). This last paper summarized production, completion techniques and hydraulic fracturing stages performed in 57 Eagle Ford wells. Since the previous papers, many new wells have been completed, considerably expanding the data available for analysis. Completion volumes, well architecture and reservoir character are analyzed. The entire data set is mapped in an effort to understand anomalies and trends. As the successful development of this reservoir has relied in the combination of horizontal drilling, multistage completions and hydraulic fracturing, the results should be valuable for understanding and optimizing completions in the Eagle Ford and similar shales.