SPE Online Education
Minifrac Tests are also known as: Fracture Diagnostic Tests (FDT), Fracture Calibration Tests (FCT), or Diagnostic Fracture Injection Tests (DFIT).
The objectives of Minifrac Tests differ depending on the permeability of the formation, which dictates the type of test that is appropriate for the analogue treatments: Frac-Pack, Conventional Prop Frac, Acid Frac or Unconventional Frac. The design of the appropriate Minifrac Test also depends on the permeability of the formation; while the aim is to obtain the most information at the least cost, least time, and least formation damage. The test procedures also differ, that is, we can have a Pump-in Shut-in Test, a Pump-in Flow-back Test, etc.
Basic analysis techniques include: Linear Plots, Square Root Plots, Log-Log Plots, and G-Function Plots. A major parameter determined is the Closure Pressure, which is used to determine almost all other parameters: Efficiency, Pad size, Net-Pressure, etc. The Rate Step-Down Test analysis determines the three friction components: Pipe, Perforation, and Near-wellbore advanced analysis techniques include Before Closure Analysis, and After Closure Analysis. Besides the Flow regime (Bilinear, Linear, or Radial), other parameters can be determined: Permeability, Fracture Length, Reservoir Pressure, etc. Step-Up Rate Test, useful for Acid Fracturing, includes the determination of The Fracture Extension Pressure, and the Minimum Horizontal Stress.
Leon Massaras has over 25 years' experience in all types of oil and gas development projects worldwide. He has a Bachelor’s degree in Civil Engineering from the University of Massachusetts.
Leon is an international authority on hydraulic fracturing of conventional and unconventional reservoirs, including deep HPHT applications with all types of placement techniques, such as Tubing, CTU, Jetting, etc. He has developed innovative analysis techniques (e.g., Enhanced Fracture Entry Friction Analysis, Median Ratio, Inverse Slope, and Screenout Index) Mr. Massaras is also highly experienced in many other types of well services such as Well Cementing, Completions, Formation Damage Remediation, Sandstone Matrix Acidizing, Sand Control, Perforating, Jetting Applications, Acidizing, Nitrogen, CTU, Log Analysis, Production Prediction, Well Testing and Analysis, Wellbore cleanout and Wellbore Repairs.
During his long career, Mr. Massaras has worked in all types of geological and geographical environments throughout the world. He has held positions of increasing responsibility at Halliburton, Resources Engineering Systems (RES), SLB NExT, Synergy, Pangea, and Stratagen.
Leon is a member of SPE. He has written a number of publications for SPE and related to Hydraulic Fracturing of conventional and unconventional reservoirs, and has been an invited speaker at SPE and other conferences.
SPE Webinars are FREE to members courtesy of the