Ultra-high-temperature downhole reservoir testing system offers high-resolution pressure measurements

Posted on 27 March 2013

The Quartet-HT system uses an all-ceramic, multi-chip module design and quartz pressure sensors, which ensure reliable multi-cycle operation and high-quality measurements at ultra-high temperatures.

The Quartet-HT system uses an all-ceramic, multi-chip module design and quartz pressure sensors, which ensure reliable multi-cycle operation and high-quality measurements at ultra-high temperatures.

Schlumberger has launched the Quartet-HT high-performance downhole reservoir testing system. This reservoir characterization service delivers high-quality measurements and reservoir-representative fluid samples with increased safety and efficiency in ultra-high-temperature reservoirs to 410°F (210°C).

“This complete downhole testing system can isolate, control, measure and sample all in a single run,” Sameh Hanna, president of Schlumberger’s Testing Services, said. “In addition, the new ultra-high-temperature technology allows us to position our test tools deeper and closer to the reservoir for the best possible test results and help our customers more accurately characterize their reservoirs.”

The Quartet-HT system offers significant advantages over conventional drillstem test string designs, including lower operating pressure, fewer seals and connections, multi-cycle flexibility, single-trip efficiency and high-resolution quartz measurements. The new system combines four leading downhole technologies specifically engineered for high-performance, ultrahigh-temperature reservoir testing: CERTIS high-integrity reservoir test isolation system, IRDV intelligent remote dual valve, Signature quartz gauges and SCAR inline independent reservoir fluid sampling.

Rigorous qualification testing, which includes shock, vibration, temperature and pressure, was performed at test facilities in France, the UK and the US. The quartz gauge electronics used in the Quartet-HT system underwent 3,000 hrs of qualification testing above the maximum operating temperature limit. The quartz gauges have been used for more than 20,000 cumulative hrs of reservoir testing operations, including operations in Asia, Australia and the Middle East where the tool has successfully recorded entire jobs at temperatures exceeding 400°F (204°C).

For more information on the Quartet-HT system, click here.

Quartet-HT, CERTIS, IRDV, Signature and SCAR are marks of Schlumberger.

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