New Approach to H_2S Limits for High-Pressure, High-Temperature Petroleum Production Wells

摘要

In high-pressure, high-temperature (HPHT) wells, mere ppm-level hydrogen sulfide (H_2S) can cause H_2S partial pressures (P_(H_2S)) over the limits for many high-strength steels and corrosion-resistant alloys (CRAs) currently allowed by NACE MR0175/ISO 15156. Such situations create design and economic challenges by limiting the use of these cost-effective materials required for HPHT completions. This article covers new methodologies that may expand the range of HPHT well conditions where high-strength materials and CRAs can be used.