ODH4 Distributed Acoustic Sensing Interrogator

High Performance Distributed Dynamic Strain Measurements

For applications requiring high fidelity Distributed Acoustic Sensing (DAS) measurement performance, the OptaSense ODH4 DAS interrogator unit offers the ideal solution.

One Instrument, Multiple Applications

Useful measurements for useful applications. The dynamic setup capabilities of ODH4 always allows the best parameters purposed for specific applications:
  • Active and passive seismic services
  • Earthquake recording
  • Wellbore production, injection and integrity monitoring
  • Wellbore stimulation monitoring and cross-well strain
  • Distributed temperature gradient sensing (DTGS)
ODH4 Distributed Acoustic Sensings Interrogator

Superior Measurement

With a focus on quality and excellence, The ODH4 components and engineered design delivers the best measurement possible. What sets its measurement apart is the ability to delivery on the key metrics of dynamic range, broadband width, sensitivity and spatial sampling density. To achieve this, the ODH4 utilizes novel techniques:
  • Multiple laser interrogation
  • Vibrational noise mitigation
  • Wavelength diversity processing
  • Quiet coherent lasers

System Performance

The ODH4 provides real-time delivery of quantitative phase or intensity measurements. Other features include:
  • Enhanced 6 dB sensitivity improvement
  • Single-mode or multi-mode fiber interrogation
  • Fine 1m spatial output of either phase or intensity-based measurements
  • Easily adjustable gauge length settings
  • GPS time synchronization
  • Flat frequency response including down to DC (0 Hz)
  • Sample rates up to 100 kHz

Deployment of Distributed Acoustic Sensing

The integrity of the cable and fiber used is key to a successful deployment. Cables can survive in extreme harsh environments for the lifetime of the asset. Reaching pressure of 20,000 psi and temperatures of 300 °C are not a problem.

Did You Know

In addition to acquiring DAS, OptaSense provides operators the ability to visualize and interpret their data, in real time.

The OptaSense DxS browser software suite provides an in depth analysis of acquired DAS data by applying processing algorithms, integrating large sets of distributed data, filtering critical data and enabling advanced workflows. The software suite allows users to easily integrate large distributed data sets into workflows, including 3D depth, time and measurement data, while managing quality control, analysis and interpretation.

DxS Visualization Software

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