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Volume 46 Issue 1
Jan.  2024
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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2024  >  46(1): 166-172
YANG Huamin, WANG Ping, TAO Cheng, WANG Jie, MA Liangbang. Combined measurement of hydrogen sulfide content and sulfur isotope in natural gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(1): 166-172. doi: 10.11781/sysydz202401166
Citation: YANG Huamin, WANG Ping, TAO Cheng, WANG Jie, MA Liangbang. Combined measurement of hydrogen sulfide content and sulfur isotope in natural gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(1): 166-172. doi: 10.11781/sysydz202401166
shu

Combined measurement of hydrogen sulfide content and sulfur isotope in natural gas

doi: 10.11781/sysydz202401166
  • 1.

    Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

  • 2.

    SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

  • Received Date: 2023-05-19
  • Rev Recd Date: 2023-12-13
  • Publish Date: 2024-01-28
    Abstract
  • The natural gas containing hydrogen sulfide in China has great exploration potential, and the origin, source and formation mechanism of hydrogen sulfide are of concern to petroleum workers. Hydrogen sulfide content and sulfur isotope analysis are two common and important identification indicators. Due to strong toxicity of hydrogen sulfide, many laboratories in China conduct fewer tests or cancel such testing items. In this paper, hydrogen sulfide conversion reagent is preferring selected in pretreatment process. At the same time, through improving isotope mass spectrometer supporting equipment, i.e. tuning the parameters of ion beam focusing of sulfur isotope Faraday cup, installing special chromatography column, Teflon pipeline, sulfur reaction tube, etc., the technology platform for combined measurement of hydrogen sulfide content and sulfur isotope is constructed. Secondly, the high purity sulfur dioxide standard gas is replaced with working standard gas of low concentration, low pressure and small volume, and the optimal experimental conditions are determined through system condition experimental exploration (stability, standard substance analysis, etc.). Finally, the solid precipitate generated by the reaction was sent into the mass spectrometer for the detection of sulfur isotope composition information, and the concentration of hydrogen sulfide in the gas to be measured is calculated by comparing signal with the isotopic composition of standard pure sulfur-containing substances. By using this method, the hydrogen sulfide content and sulfur isotope in some natural gas of Daniudi and Fuxian gas fields in Ordos Basin, and Hongxing area in western Hubei and eastern Chongqing are measured. The measured results are stable with good precision, and are consistent with the results of external laboratories. Comparing traditional method, this method can obtain sulfur content and sulfur isotope values by a single sampling. The preferred silver acetate reagent with one-step chemical method can reduce isotopic fractionation. In addition, the hydrogen sulfide inverting into solid silver sulfide are more reliable directly compared with the standard substance silver sulfide isotope. With low concentration, low pressure, small volume SO2 as the working standard gas, it reduces the laboratory safety risk and instrument damage, and meets the environmental safety requirements.

     

    • All authors disclose no relevant conflict of interests.
    The study was designed by YANG Huamin and WANG Ping. The experimental operation was completed by YANG Huamin and MA Liangbang. The manuscript was drafted and revised by YANG Huamin, WANG Jie and TAO Cheng. All the authors have read the last version of paper and consented for submission.
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