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SpectraChem data are used to evaluate frac fluid flowback profiles in order to minimize the amounts of fracturing liquids, such as gels and slickwater, that remain in the reservoir and can block hydrocarbon flow to the wellbore. 

Analyses of SpectraChem tracer data sets provide information about the effectiveness of multi-staged fracture jobs used to stimulate two or more adjacent wells simul- taneously. These multi-staged simul-fracs from pad drilling (Figure 8) expand the surface area of the shale that can freely flow hydrocarbons into the fracture system. 

Deeper perforation tunnels with limited debris create greater communication from the crude-oil producing formation to the wellbore to maximize hydrocarbon flow. The deeper, cleaner perforation tunnels also reduce the formation break- down pressure required for fracture stimulation, thereby enabling superior multi-staged fracs. 

Kodiak charges are energized using solid rocket fuel, which promotes a mini-frac at the tip of the perforating tunnel, further reducing formation breakdown pressure for superior fracture stimulation. 

During tight-oil formation stimula- tions, Core’s ZeroWash, SpectraChem, and FlowProfiler tracers are pumped into each stage to help determine the effectiveness of the hydraulic frac and fracture system cleanup, as shown in Figure 7. 

ZeroWash tracers are pumped into fractures along with the proppants that are used to hold fractures open and permit maximum flow to the wellbore. The tracers allow proppant placement to be determined. If it is discovered that any zones do not contain proppants with their associated ZeroWash tracers, those zones can be refractured while pressure pumping equipment is still at the well site. 

