Quartet Downhole Reservoir Testing System | SLB


Downhole reservoir testing system

Illustration of the Quartet downhole reservoir testing system.

Single-trip reservoir testing that combines four leading technologies

The Quartet downhole reservoir testing system lets you directly interact with four integrated tools to isolate, control, measure, and sample in one run using a single test solution. The system enables you to obtain the most accurate characterization of your reservoir and achieve safer and more efficient drillstem tests (DST) that are in tune with your test objectives.

Quartet Downhole Reservoir Testing System

Four leading downhole tools in one advanced string for single-trip testing efficiency

Less Nitrogen
Fewer Connections
Fewer Seals
Lower Operating Pressure
Quartet Downhole Reservoir Testing System at downhole and surface

Downhole string technology—simplified

The Quartet system is short but powerful, providing numerous advantages over conventional testing strings:

  • Lower operating pressure and less nitrogen increase operational safety.
  • Shorter string combines four tools while eliminating drill collars and slip joints and requiring fewer seals and connections to provide more efficient handling for more cost-effective downhole testing.
Isolate with CERTIS

CERTIS high-integrity reservoir test isolation system

The CERTIS 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 with IRDV

IRDV intelligent remote dual valve

The IRDV 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.

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Measure with Signature

Signature quartz gauge

With 100% ceramic-based electronics and proprietary long-life batteries, Signature quartz gauges acquire high-quality pressure data for the entire test duration.

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Sample with SCAR

SCAR inline independent reservoir fluid sampling

SCAR sampling captures independent and redundant representative fluid samples from deep within the reservoir. Collection directly in the flow stream eliminates contamination caused by dead volumes.

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Downhole reservoir testing system