Sub-seismic resolution measurements in real-time
Distributed fiber-optic sensing is increasingly being used for microseismic monitoring and processing using fiber permanently installed on casing or temporarily deployed on wireline.
Real-time microseismic processing in the field with fiber-optic arrays can be conducted in multiple wells, resulting in the ability to make more rapid frac operation decisions.
Improved Reservoir Understanding
Microseimic with fiber can offer sub-seismic resolution (better than surface seismic data) of structural features that improve understanding of reservoir geology. DFOS microseismic has a number of advantages over conventional geophone arrays. Thousands of channels with dense receiver spacing can be obtained for low incremental cost. If the fiber is permanently installed, microseismic data can be acquired without interrupting operations and with lower HSE risk.
Fiber-optic microseismic can capture larger events that may exceed the dynamic range of borehole geophone arrays, including large distant events, useful for monitoring induced seismicity and delineating structural features in the reservoir.
3D Mapping With Multiple Wells
With fiber-optic microseismic, you have the ability to estimate precise 3D locations and magnitudes, frac height and width, as well as fault growth. The ability to integrate microseismic with other measurements, such as hydraulic fracture profile injection analysis and crosswell strain, makes it useful for guiding frac operations and integrating into the reservoir framework.
Single Well Constrained Mapping
In single wells, you can detect events, estimate their location along the fiber, determine distance from the fiber, and measure the magnitude of the event, making it useful for monitoring induced seismicity.
Value of Fiber-Optic Microseismic for Hydraulic Fracturing
- Use existing fiber in treatment wells
- Mobilize the recording system on demand, recording system might be permanently installed on site for other purposes
- Record temperature, strain, seismic and microseismic with the fiber in same well or in neighboring treatment wells
- Reduce HSE risk and cost by remote operation
- Monitor hydraulic fracturing operations for entire pad
- Record with a large-aperture, densely sampled sensor array
- Process and analyze high-quality complex event wave forms directly from the frac zone.
- Integrate temperature, strain and microseismic data for a combined analysis.
In addition to hydraulic fracturing, fiber-based microseismic can also be used in CO2 sequestration applications, mining and other geotechnical applications.
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Additional Seismic Services
VERTICAL SEISMIC PROFILING Cost-effective, repeat acquisition OptaSense vertical seismic profiling (VSP) services provide accurate, repeat borehole seismic measurements that provide enhanced imaging of the reservoir, without the need for well intervention. With OptaSense VSP acquisition
MICROSEISMIC MONITORING Enabling permanent borehole microseismic monitoring OptaSense DAS can also enable permanent borehole microseismic monitoring, especially of those larger magnitude events that originate at existing fault locations. Because of the broad bandwidth and high