SpecialReport: Unconventional Resource Science TABLE 1 Native and Design Parameters used in KPI Analysis Design Parameters Deviation Type Easting (m) Inside Distance Northing (m) Outside Distance Type Cluster Spacing Stimulated Lateral Length (ft.) Shot Density (shots/ft.) Total Clusters Average Max Rate Average ISIP Average Max Pressure Slurry Volume (bbl.) Total Proppant Injected (lb.) less interference between laterals positively impacts their output. It should be noted that increasing the inside distances between laterals does not necessarily increase performance in older wells, which suggests there should be an optimum distance for establishing sufficient matrix connectivity while also Native Parameters BTU Area Average Lang P (psi) Average Lang Vol. (scf/ton) Net Thickness (ft.) Permeability (md) Porosity (%) Water Saturation (%) TOC (%) Bulk Modulus Min Horizontal Stress Poisson's Ratio Shear Modulus Young's Modulus Average Breakdown Pressure Average Breakdown Rate avoiding well interference. The WQA analysis in Figure 5 shows that the inside distance of 1,900 feet might be an optimum distance between laterals for wells in the study. The parameter tracking total number of clusters recognizes that horizontal drilling and multistage, multicluster hydraulic fracturing are the preferred method for Marcellus development. Clearly, longer horizontal laterals with more stages/clusters increase reservoir exposure and produce more gas. As expected, FTA and WGA analyses demonstrate a positive correlation between the number of clusters in a well and its quality. In other words, highperformance wells are those that have been completed with a greater number of stages/clusters. Similar results have been found with regard to slurry and proppant volumes. FTA and WGA analyses show a clearly observable trend in which production performance increases alongside injected slurry volume. The wells' production performance also has a direct correlation with the amount of proppant that is pumped in each stage. The better wells have been treated with more proppant than the lower-quality ones. A similar analysis that uses KPI pattern recognition technology can calculate and What you're reading is more than just copy. It's also copyrighted. So before you head over to the photocopier, make sure you have permission. Contact the publisher or visit www.copyright.com. 60 THE AMERICAN OIL & GAS REPORTER