WellWatcher BriteBlue HT High-Temperature Multimode DTS Fiber | Schlumberger

WellWatcher BriteBlue HT

High-temperature multimode DTS fiber

Enhance high-temperature well production with real-time reservoir surveillance

Improve recovery in high-temperature and high-hydrogen applications by rapidly identifying—and responding to—changes in reservoir flow based on distributed temperature sensing (DTS) using the WellWatcher BriteBlue HT multimode DTS fiber.

Our fiber-optic technology enables you to monitor downhole distributed temperature profiles at the surface in real time. You can also transmit the data to your digital oilfield platform or other locations via satellite, Internet, or cable. The result: Reduced downtime and deferred production because you can react more quickly to detrimental events, and cost savings because you can precisely identify the problem. 

Designed for challenging applications with high heat (up to 572 degF [300 degC]) and hydrogen, this fiber is uniquely stable and reliable in heavy oil thermal recovery operations. For example, it is used in steam-assisted gravity drainage (SAGD) producer wells to ensure that the correct level of subcooling is maintained to avoid steam breakthrough from the injector above.

WellWatcher BriteBlue HT DTS Fiber
Extend the temperature range of downhole optical fiber surveillance with WellWatcher BriteBlue HT multimode DTS fiber.
Enhance Your Unconventional Field Strategy with Fiber Optics
When you deploy optical fiber in several wells as part of your unconventional field development program, you’re investing in long-term knowledge about your wells and reservoir.
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WellWatcher BriteBlue HT
High-temperature multimode DTS fiber

Simplify fiber delivery and economics

The optical fiber can be pumped through a conduit using Schlumberger patented techniques to provide a cost-effective DTS system suitable for high-volume applications. The conduit is hung from the surface across the interval of interest, and the temperature of the entire wellbore is monitored.

Downhole distributed temperature profiles can be monitored at the surface in real time; data can also be transmitted to multiple remote locations. Consequently, anomalies such as loss of tubing, casing, or cement integrity or malfunctioning gas lift valves can be immediately recognized and remedial actions planned.

Enhance lifetime in hydrogen environments

Conventional DTS-fiber temperature ratings do not take into account the degradation of the fiber when it is exposed to high levels of hydrogen (e.g., in SAGD wells), especially at high temperatures. Schlumberger pioneered accelerated aging tests for optical fibers at high temperatures. The fiber resulting from this research demonstrated an almost 50-fold increase in light transmission, exceptional resistance to hydrogen, longer life, faster response times, and better spatial resolution.

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.

Distributed permanent measurement acquisition hardware and software

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