Metris Flux

Applications

• Sandface monitoring for
  • production and injection profiles
  • well cleanup efficiency
  • out-of-zone injection
  • stimulation efficiency
• Subsea distributed temperature monitoring
• Detection of
  • GOR change
  • gas and water breakthrough
  • crossflow between zones and wells
• Determination of fluid allocation and volumetrics

Benefits

• Fewer interventions due to reduced need to run production logging tools
• Immediate corrective actions due to continuous real-time monitoring
• Reduced time and costs due to simplified subsea interface architecture
• Enhanced production management and recovery due to improved reservoir surveillance

Features

• Single wellhead penetration for multiple gauge stations and temperature arrays
• Precise temperature resolution
• Long-term trend accuracy due to measurement stability
• Debris-immune wireless power and telemetry transmission across stages via inductive couplers
• Proprietary telemetry for bidirectional data transmission
• Up to 60 sensors per array
• Multiple arrays per well
• Immunity to ESP electrical noise

How it improves performance

The Metris Flux™ subsea distributed sensing array acquires high-resolution distributed temperature measurements as well as discrete pressure and temperature (PT) measurements along the zones of interest. It extends monitoring into the lower completion by using field-proven inductive coupling techniques. The system has particular applicability to subsea wells and multitrip completions. Acquired data can be used to characterize the reservoir and optimize production and reservoir depletion with the help of Optiq™ real-time fiber-optic interpretation and analysis, which is suitable for any data acquired via distributed sensing.

How it works

Quartz PT gauge stations
The Metris Flux array includes stations, each housing a quartz gauge, which provide PT readings from above or below the production packer.

Distributed temperature array
Arrays of miniaturized, hermetically sealed digital temperature sensors provide measurements with a resolution up to 100 times higher than that obtained with optical fiber. The sensors are based on platinum resistive temperature detection (RTD) technology and have a resolution of 0.0054 degF [0.003 degC] at a 1-min sample rate and an accuracy of 0.18 degF [0.1 degC].

Array architecture
All the sensors in an array are connected to a single ¼-in electric cable. Each array contains up to 60 sensors, spaced at least 5 ft [1.5 m] apart, with a maximum length of 1,640 ft [500 m] for a full array. Multiple arrays can be installed across multiples zones of interest in each well.

Power and telemetry
Power and bidirectional high-rate telemetry are provided via a single permanent twisted-pair electric cable and inductive coupling, simplifying installation and requiring only a single wellhead penetration.

Inductive coupling
An inductive coupler integrated into the tubing or casing enables wireless communication and power transmission between completion stages. The couplers are not affected by debris and eliminate the need for downhole wet-mate connections.

Proven downhole gauge technology
The Metris Flux array is designed with the most advanced and proven gauge technology available. Long-term reliability results from multiple features:

• high-temperature multichip module electronics and quartz sensors
• proprietary telemetry for bidirectional communication
• onboard system for monitoring and diagnostics
• Intellitite™ downhole dual-seal dry-mate connectors
• firmware download capabilities.

Analysis of flow profiles
A surface acquisition system uses industry-standard protocols to transmit data to your location anywhere in the world, where real-time analysis and thermal modeling enable monitoring, characterizing, and managing flow profiles without intervention or choking back production.