Solutions for Shale Reservoirs
The more you know about the reservoir,
the more successful you’ll be at optimizing recovery
Using Distributed Acoustic Sensing (DAS) technology, this system enables operators to visualize borehole seismic data, completion operations, fracture propagation and productivity, along the entire wellbore, for the life of the asset. This insight leads to smarter well planning that optimizes development costs and enhances recovery.
Characterize induced and natural fractures by acquiring 4D time-lapse surveys, pre and post frac, to visualize subsurface regions that have been permanently affected by stimulation. This insight optimizes infill drilling operations. Understand the location, magnitude and timing of seismic events using our microseismic mapping services, to identify fracture and proppant degradation that can accelerate well declines and reduce reserves. Incorporate seismic-derived data into reservoir drainage and fracture simulation models to reduce spatial uncertainty associated with low resolution 3D seismic images. High resolution seismic images from DAS VSP can illuminate the petrophysics surrounding microseismic events.
Pinpoint underperforming stages and clusters by monitoring production at the perforation level, across the length of the well. Correlate production flow data with geologic properties and fluid and proppant placement, to evaluate profitable field development designs. Integrate DAS and Distributed Temperature Sensing (DTS) with subsurface parameters to evaluate choke management practices and their ability to effectively drawdown across the lateral. Combine production data with 4D VSP monitoring and time-lapse imaging to monitor and evaluate the impact of production on the reservoir over time. This provides the insight to evaluate enhanced oil recovery placement and efficiency for optimal refracturing operations. Combine passive microseismic monitoring to detect induced and natural fractures for effective draw-down management. This will enhance recovery by ensuring fracture pathways remain open. Listen to production flow across artificial lift valves and pumps, providing the condition monitoring necessary to support predictive maintenance and lower lifting costs.
HOW IT WORKS
For measurement, the system utilizes a Coherent Optical Time Domain Reflectometer, or Interrogator Unit (IU), located on the surface. After injecting laser pulses down the length of the fiber, the IU processes
and records changes in the backscattered light, that is a function of strain on the fiber.
The returned signal, carried by the back-scattered light, is sampled at a high frequency (up to 20 kHz). Then position and amplitude of strain sites are determined and visualized using proprietary software.
The DFOS system leverages existing permanently installed fiber, which is ideal for low cost, nonintrusive evaluation and monitoring. Once installed, the system eliminates any future well interventions for repeat
surveys and monitoring.