Quartet-HT High-Temperature Downhole Reservoir Testing System | Schlumberger
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Quartet-HT

High-temperature downhole reservoir testing system

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Isolate, control, measure, and sample your reservoir—in a single trip at up to 410 degF

The Quartet-HT high-temperature downhole reservoir testing system brings new reliability and efficiencies to HT downhole testing. The integration of 100% quartz measurement sensors, all-ceramic multichip module electronics, and multicycle operational flexibility enables you to accurately characterize your reservoir in a single trip. 

Additional efficiencies for HT operations are delivered by

  • no drill collars or slip joints
  • fewer seals and connections
  • shorter string design
  • less nitrogen
  • lower operating pressure
  • premium connections.

Combining four leading downhole tools for reservoir-representative samples at ultrahigh temperatures

Isolate
The CERTIS high-integrity reservoir test isolation system combines many features of a conventional retrievable packer with those of a permanent production packer, including a built-in floating seal assembly that eliminates the need for drill collars and slip joints. No string manipulation is required for setting—just apply annulus pressure to activate the hydraulic setting mechanism. At the end of the test, a straight pull releases the packer and then reopens the bypass to eliminate swabbing when coming out of the well.
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Control
The IRDV intelligent remote dual valve combines a tester valve and a circulating valve that can be cycled independently or in sequence for efficient, nitrogen-free multicycle operations. Both valves can be operated with a single command that is immune to downhole pressure and temperature and easily applied with low-intensity annular pulses or with Muzic telemetry for bidirectional communication and verification.
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Measure
With 100% ceramic-based electronics and proprietary long-life batteries, Signature quartz gauges acquire high-quality pressure data for the entire test duration. Muzic telemetry delivers real-time wireless readout of downhole measurements.
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Sample
SCAR inline independent reservoir fluid sampling captures representative fluid samples from deep within the reservoir. Collection directly in the flow stream eliminates contamination caused by dead volumes.
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Muzic

Wireless telemetry

Achieve bidirectional command and control between surface and downhole using wireless signals.

Quartet

Downhole reservoir testing system

Monitor and manage wellbore events as they happen, validate pressure data while you test, and ensure that you've met your test objectives before ending your test.

Signature

Quartz gauge

Obtain precise pressure measurements in a wide range of environments with reliable downhole recorders.

CERTIS

High-integrity reservoir test isolation system

Reduce rig time with single-trip setting capability and integrated tools in the downhole test string.

IRDV

Intelligent remote dual valve

Combine a tester valve and a circulating valve that can be cycled independently or in sequence.

SCAR

Inline independent reservoir fluid sampling

Obtain single-phase, reservoir-representative PVT samples while reducing rig time and risks with independent nitrogen-charged samplers.
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Product Sheet Signature Quartz Gauge Carrier

Reliable platform for Signature quartz gauges.

Product Sheet Signature Quartz Gauges

Reliable, accurate pressure measurements in extreme environments.

Industry Article Reservoir Testing System Evolves to Meet New Frontier Challenges

As today's deep wells challenge the bounds of pressure and temperature, accurate reservoir testing has become essential to mitigate production risk.

Industry Article Downhole Reservoir Testing System Withstands Ultra-High Temperatures

The Quartet-HT high-performance downhole reservoir testing system from Schlumberger combines four downhole technologies into one advanced downhole string design for ultra-high-temperature reservoirs up to 210°C (410°F).

Product Sheet Quartet-HT High-Performance Downhole Reservoir Testing System

High-quality measurements and samples at ultrahigh temperatures for better reservoir characterization.

Brochure Quartet-HT High-Performance Downhole Reservoir Testing System

High-quality measurements and samples at ultrahigh temperatures for better reservoir characterization.

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