page 52-63_Layout 1 12/2/2015 11:11 AM Page 62 SpecialReport: Well Stimulation & Completion Technology FIGURE 9 Stages 2-5 Microseismic Data with P-Impendance and Flooding Surface 345H: WFMP B bench (stages 2-5) into the shallower flooding surface above. The second criterion is for fracture con- 345H: WFMP B flooding surface (stages 2-5) tainment in areas of greater ductility. This would include those areas that map flooding surfaces with significantly lower values of p-impedance for increased Vclay (and perhaps kerogen). Fracture containment becomes increasingly critical when implementing chevron-type patterns for stacked horizontal wells, and potentially could prevent the fracturing and "thieving" of oil production from adjacent pay zones. Well 345H Results Investigating the first criterion shows a high density of microseismic events in stages 5 through 10, where the 345H was landed in an area of higher impedance (blue color in Figure 8). For the second criterion, the seismic event (flooding surface) above the landing bench is representative of particularly lower impedance from stages 5 through 10, and may act as a ductile barrier to contain fracture propagation within the zone. Note that the microseismic heights at these stages are minimal and do not appear to extend into the Wolfcamp A zone above, from which the 346AH produces. The stage 5 microseismic events show