HP/HT

Talisman Energy needed to enhance its continuous downhole monitoring capability at the Gyda field offshore Norway with a system that could perform in high-temperature (HT) conditions and operate beside electric submersible pumps (ESPs) in two oil production wells.

As operators continue to drill into deeper and more-extreme formations, the demand for technologies suited to these environments increases.

With exploration in harsh environments and consequent high-pressure and high-temperature conditions, calculating reservoir properties has become complex and changes in pressure-transient response need to be understood and appreciated by taking appropriate measures.

FPWD provided a direct pressure measurement while drilling to set the lower boundary, and formation-integrity tests (FITs) with MPD provided the upper boundary.

High-pressure/high-temperature (HP/HT) operations are projected to double in well count over the next 6 years. In addition to this steady increase in activity, the conditions in these extreme wells will also become more severe as well depths, pressures, and temperatures also trend higher.

Industry operations are shifting toward high-temperature (HT) downhole settings, expensive tubular metallurgy, and extended reach wells, while health, safety, and environmental requirements become stricter.