ODH Interrogator Unit

Delivering unmatched imaging and measurement performance

For applications requiring unmatched Distributed Acoustic Sensing (DAS) measurement performance and image resolution, the OptaSense ODH-4 DAS interrogator unit offers the ideal solution.
Superior Imaging
The ODH-4 provides a 6 dB improvement in signal-to-noise ratio—delivering the highest fidelity Vertical Seismic Profiling (VSP) measurements available, while making microseismic measurements with DAS an operational reality. In addition to higher quality seismic imaging, the ODH-4 offers increased sensitivity and finer spatial resolution (1.3 m) for high-caliber image resolution.
Multiple Measurements
The ODH-4 is a four laser interrogator. With four unique wavelengths, the ODH-4 not only provides superior imaging, it provides operators the opportunity to take full advantage of available DAS data by recording multiple measurements, such as fracture profiling and production flow monitoring, at the same time.
System Performance
The ODH-4 provides robust system performance, including a variety of data outputs, enduring high-pressure, high-temperature conditions, and continuous performance monitoring.

With a higher broadband frequency, the ODH-4 processing unit provides finer imaging at a sample rate of 200 kHz. The ODH-4 is capable of enduring environmental conditions reaching 20,000psi and 300° C.

The interrogator enables recording at every location along a single-mode or multimode optical fiber, including passive recording. For optimal measurements, the ODH-4 offers a system interface that leverages GPS to assign a spatial coordinate from surface to depth—ensuring microsecond accuracy across each segment of fiber.

Did you know

What sets our DAS technology apart is our understanding of the importance of operator control. In addition to acquiring DAS, OptaSense provides operators the ability to visualize and interpret their data, in real time.

The OptaSense DxS 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.

Visualization Software

Related Links

Ready for unmatched DAS measurements?