Well testing technology deployed under extreme conditions in Libya

HALLIBURTON RECENTLY DEPLOYED its new Hostile Sequential Formation Tester II (HSFT-II™) tool in Libya. This latest formation evaluation tool allows operators to evaluate formations at increased pressures and temperatures, up to 30,000 pounds per square inch (psi) and 450°F, respectively, and in boreholes as small as four inches. The manufacturer says that no other commercially available formation testing tool is rated for such operating conditions.
In June 2009, Halliburton evaluated Shell’s Rashda A1 well in Libya with its industry-leading high-pressure/high-temperature (HPHT) wireline logging suite and the newly introduced HSFT-II tool to acquire downhole formation pressures, at temperatures reaching 420°F, a first for Shell, and pressures of about 20,000 psi. Normally, in these hostile conditions, drilling would have been 'blind', and the low-risk option would have been to set an intermediate liner to prevent formation damage, at considerable cost with associated non-productive time. With the HSFT-II tool, five pressure points were successfully acquired, which revealed that the drilling operation could continue with minimal risk of a blowout, saving time and money. As operators continue to expand their operations into increasingly challenging downhole environments, Halliburton endeavours to keep pace with their evolving demands by providing technologies to help them optimise their assets while reducing non-productive time, costs and risks.
“This capability is clearly demonstrated on the high-pressure/high-temperature job successfully completed in Libya for Shell,” said Jonathan Lewis, vice president of Wireline and Perforating, a Halliburton product service line. “The Rashda A1 pressure data was successfully collected at the highest temperatures ever attempted by Halliburton and provided the customer with very valuable information in the most difficult of downhole conditions.”

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