带压含硫气田水中H_(2)S的测定北大核心CSCD

目的捕集和检测带压含硫气田水常规减压取样过程排放闪蒸气中损失的H_(2)S组分,以实现带压含硫气田水中H_(2)S含量更加准确的测定,为优化和提升闪蒸气H_(2)S处理装置的设计和净化效率提供数据支撑。方法针对当前气田水减压平衡处理后H_(2)S测定结果明显偏低的问题,从带压液体取样和H_(2)S气体分析检测两个方面开展研究,讨论了取样装置、取样方法、分析检测方法、样品前处理、酸液用量和汽提时间等参数的影响。结果实现了等压取样,汽提时间为5 min,样品无须过滤前处理,解吸液为去离子水,以经典碘量法检测H_(2)S。结论通过比较实际样品带压和减压条件下H_(2)S含量的测定结果,表明该技术对准确测定带压含硫气田水中H_(2)S含量更加可靠,并将对其他带压溶液中溶解性气体的测定提供可借鉴的思路。

Determination of H2S in the pressurized sulfur-containing gas field water

ObjectiveCapturing and detecting the lost H₂S component in the emitted flash gas during conventional decompression sampling towards pressurized sulfur-containing gas field water can realize the more accurate determination of its H₂S content, and provide data support for optimizing and upgrading the design and purification efficiency of H₂S treatment unit over flash gas. Methods Considering the problem that the determination result of H₂S for gas field water after the decompression and balance treatment are obviously low, this work conducts the research from the aspects of pressurized liquid sampling and H₂S gas analysis to discuss the influences of parameters including sampling device, sampling method, analysis method, sample pretreatment, acid consumption and stripping time. ResultsIsobaric sampling is realized, stripping time is 5 min, no pre-filtration treatment is required, deionized water is chosen as the desorption liquid, and the classical iodometry is used as the detection method for hydrogen sulfide. ConclusionsBy comparing the determination results of H₂S content upon actual samples under pressure and decompression conditions, it shows that this technology is more reliable for accurate determination of hydrogen sulfide content in pressurized sulfur-containing gas field water, and will also provide a promising strategy for determination of dissolved gas in other pressurized solutions.