WellWatcher Flux Multizonal Reservoir Monitoring System | Schlumberger

WellWatcher Flux

Multizonal reservoir monitoring system

Enhance recovery and reservoir management with continuous, realtime sandface measurement

Characterize reservoir flow continuously and in real time without interventions or production interruptions using the WellWatcher Flux multizonal reservoir monitoring system. This system successfully addresses the challenge of acquiring reservoir data in real time across the sandface of wells with multistage completions.

With a single wellhead penetration, you can multidrop conventional quartz pressure and temperature gauges or arrays of up to 60 miniaturized digital temperature sensors distributed along both the sandface and the upper completion. These sensors provide the highest-resolution temperature measurements in the industry.

High tolerance for debris and vibration makes the system particularly suitable for multistage deepwater completions, where intervention costs and risks are high.

WellWatcher Flux multizonal reservoir monitoring system

Distributed permanent measurement acquisition hardware and software

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  • Surface hardware
  • Downhole hardware
  • Acquisition software
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WellWatcher Flux multizonal reservoir monitoring system
Understand flow profiles—zone performance, water or gas breakthrough, and zonal crossflow—without choking production or performing interventions.

Monitor even complex completions wirelessly

Complex completions installed in two parts consist of a lower completion containing the gravel-pack assembly across the production zone and an upper completion containing the packer and production tubing. Connecting electric downhole cables between the two zones is problematic and therefore traditionally, sensors have not been deployed across the reservoir interval of the lower completion. In the WellWatcher Flux system, an inductive coupler fully integrated into the completion hardware enables wireless communication and power transmission between the upper and lower completions.

Optimize production with actionable information

The WellWatcher Flux system has been used to monitor cleanup-phase effectiveness, track injection flow paths, identify the most prolific producing zones, identify water or gas breakthrough, and monitor changes. The surface acquisition system can transmit data to your office, where real-time analysis with thermal modeling software allows flow events to be interpreted even in high-angle wellbores, enabling fast, informed decisions for optimal control of assets.

Pressure transient analysis (PTA)
Early water breakthrough requires you to balance choke adjustments with the stimulation treatment. WellWatcher Quartz premium high-temperature, high-resolution PT gauges can be placed in a well to provide PTA workflows. These workflows reveal changes in skin and can be used to determine the productivity index (PI) of the well. Understanding the changes in PI enables you to take the necessary steps to optimize production over the life of the well.
Inflow profiling
In fields with stacked reservoirs, where pressure, permeability, and oil and gas characteristics vary greatly between layers, WellWatcher BriteBlue multimode DTS fiber can be run to provide inflow profiling of individual zones. Downhole flow control valves can then be used to manage individual zones independently, without costly intervention.
ESP management
Downhole pressure and temperature measurements obtained with WellWatcher Sapphire PT gauges can be combined with ESP surface parameters, such as variable speed drive frequency, to prevent deadheading, which often requires a costly workover and ESP replacement. The data can also be used to troubleshoot other common ESP scenarios that reduce well productivity, such as scale deposition above the pump and loss of pump submergence.
Unconventional well stimulation
Using WellWatcher Extend high-resolution dual-sensor PT gauges in unconventional oil and gas wells to monitor bottomhole pressure helps in identifying significant changes to skin, degradation of fracture size and conductivity, and stress-related permeability behaviors. Proactively analyzing the data enables you to monitor drawdown during production and the health of the fractures, both of which are important for long-term well performance.
WellWatcher Flux | Applications
Multizonal reservoir monitoring system
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