Mini-Frac’ DFIT Testing

Doubles For Initial Test… Mini-frac’ or Diagnostic Fracture Injection Tests (#DFIT) help double your testing efficiency if pressure gauges are downhole. First, a successful test helps estimate hydraulic fracture closure pressure and reservoir flow properties—valuable information for stimulation programs. Second, the pressure fall-off #welltest can be analyzed (#PTA) to comply with #AER Initial Pressure requirements for Oil or Gas (#LNG) wells (p*). A minimum shut-in of 8 h is required for the transient gauge PAS file data (TRG.pas) to be flagged as test purpose “Initial.” If the final pressure passes the Board’s 2 kPa Rule (pressure changing <2 kPa/h/6 h) then you are done. If not, pressure transient analysis (PITA) will be required to provide the extrapolated p* for compliance.