DOWNHOLE SPECTROSCOPIC HYDROGEN SULFIDE DETECTION

摘要

Methods and related apparatuses and mixtures are described for detecting hydrogen sulfide in a formation fluid downhole. A detection mixture is combi ned with the formation fluid downhole. The detection mixture includes metal ions for reacting with hydrogen sulfide forming a metal sulfide, and charged nanoparticles sized so as to inhibit significant aggregation of the metal s ulfide so as to enable spectroscopic detection of the metal sulfide downhole . The combined mixture and formation fluid is then spectroscopically interro gated so as to detect the presence of the metal sulfide thereby indicating t he presence of hydrogen sulfide in the formation fluid. The mixture also inc ludes chelating ligands for sustaining thermal endurance of the mixture unde r downhole conditions.