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Downhole reservoir testing


Schlumberger announced the release of the Quartet high-performance downhole reservoir testing system.

This complete downhole testing system allows operators to isolate, control, measure and sample all in a single run. Now operators can test more safely and efficiently for an altogether better reservoir test, said Devan Raj, marketing and technology manager, Schlumberger Testing Services.

During exploration in the Gulf of Venezuela, an operator needed to perform a series of downhole tests on its high-rate gas wells to determine reservoir properties. With the Quartet system's single-trip efficiency, the operator saved four days of rig time while safely achieving its test objectives.

The Quartet downhole assembly is one fourth the length of conventional configurations. The system offers a range of advantages, including 35 per cent lower tool operating pressure, 90 per cent less nitrogen, 50 per cent fewer seals and 60 per cent fewer connections. In addition, drill collars and slips joints are eliminated from the downhole string.

The Quartet system consists of four technologies engineered specifically for reservoir testing: CERTIS high-integrity reservoir test isolation system, IRDV intelligent remote dual valve, CQG crystal quartz gauge and SCAR inline independent reservoir fluid sampling.