New tools, services expand deepwater well testing options

New tools and services allow companies to shorten the time required to sample and evaluate reservoir fluids encountered in deepwater exploration and appraisal wells.With deepwater drilling costs often in the $400,000/day range and regulations in place that restrict flaring in many deepwater areas, these new approaches save costs as well as provide, in many cases, sufficient fluid samples and pressure data for estimating a reservoir's production potential.For instance, Unocal Corp. in its No. 4 appraisal well at Champlain in Gulf of Mexico Block Atwater Valley 63, recently used Schlumberger Oilfield Services' new on site pressure-volume-temperature (PVT) analysis equipment (PVT Exp...

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