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PetraFrac - Frac Interference Monitoring System


PetraFrac - Frac Interference Monitoring System Related Terms

PetraFrac - Frac Interference Monitoring System, DFIT, Frac Monitoring, Surface Pressure Transient Testing

Monitoring WHP’s on offset producers during completion operations



  • Pressure sensors available in 5K and 10K PSI
  • Monitor and capture multiple wellhead (tubing/casing) pressures simultaneously (50+)
  • Wireless transmission of pressure data to base logger (no need for multiple base loggers)
  • Data transmission via RF signal up to 3000’ with clear line of sight and up to one mile with optional antenna
  • Pressure data accessed via multiple methods – (locally) view screen, stored on SD memory card, (remotely) integrated Wi-Fi, mobile device interface with local secure network, cellular service with secure direct IP address
  • Easy set up with guided self-installation, reducing field service costs
  • Pressure sensors powered with Lithium batteries for added reliability and duration
  • Base logger has internal battery but solar array can be provided for increased durations of data capture, or unit can be plugged into external power source


A key component to optimizing well spacing in unconventional plays is the capture of pressure data from nearby offset producer wells. The data capture occurs during stimulation operations and flowback/production. Subsequent interference tests over a period of months allow for a better understanding of the changes in fracture conductivity and effectively propped fractures. This data help refine the existing geologic model and assist in confirming the significance of attributes extracted from 3D seismic data sets. The PetraFrac Interference Monitoring System monitors wellhead pressures (WHP), shut-in or flowing, of surrounding producers during completion/frac operations and provides a risk free and cost effective method to capture these critical data sets.

All equipment is configured in our office to collect data at the desired frequency rates. Once the equipment is received by our customer via FedEx, easy-to-follow instructions are provided to facilitate ease of set up and the start of data collections. Alternatively, field installation and retrieval can be requested by the customer.

Once installed and activated the sensors automatically connect and begin transmitting data to the base logger via radio frequency, requiring a clear line of sight. Antennas can be provided to boost signal strength when obstructions or topography interfere with the RF signal or for distances over 3000’ (up to one mile) to the offset producers. Data streamed to the base logger can then be easily accessed and retrieved via direct download or wirelessly with cell service or internet.


  • Attach pressure sensor(s) to the needle valve on the wellhead crown
  • Activate pressure sensor(s) via push button
  • Set up base logger within vicinity or with access to external power source (solar power can be provided), then turn on.
  • Sensors auto-connect to base logger and begin recording data. . . DONE!

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