新疆石油地质

新疆石油地质 ›› 2009, Vol. 30 ›› Issue (3): 325-328.

• 油气勘探 • 上一篇    下一篇

硫酸盐热化学反应蚀变天然气模拟

丁康乐1, 李术元2, 岳长涛2, 钟宁宁3   

  1. 1.长江大学 化学与环境工程学院,湖北 荆州 434023;
    2.中国石油大学 重质油国家重点实验室,北京 102249;
    3.中国石油大学 资源与信息学院,北京 102249
  • 收稿日期:2008-09-04 修回日期:2008-12-05 出版日期:2009-06-01 发布日期:2020-10-29
  • 作者简介:丁康乐(1976--), 男,山东平阴人,讲师,博士,油田化学, (Tel)13545695161(E-mail)dingkl2001 @yahoo.com.cn.
  • 基金资助:
    国家自然科学基金项目,海相碳酸盐岩油气藏中有机含硫化合物形成机理研究(40702019)资助

Simulation of Natural Gas Altered by Thermochemical Sulfate Reduction

DING Kang-le1, LI Shu-yuan2, YUE Chang tao2, ZHONG Ning ning3   

  1. 1. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, Hubei 434023, China;
    2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;
    3. Faculty of Resource and Information Technology, China University of Petroleum, Bejing 102249, China
  • Received:2008-09-04 Revised:2008-12-05 Online:2009-06-01 Published:2020-10-29

PDF

196

摘要： 高H2S天然气一般被认为是硫酸盐热化学还原反应(TSR)的结果。在高温高压不饱和水蒸气条件下对天然气与硫酸镁TSR反应进行了热模拟实验研究,确定了TSR反应途径,探讨了TSR可能的地质影响因素。结果表明,天然气与硫酸镁反应主要生成MgO、H2S、CO2及焦炭等产物,随着模拟温度升高,TSR转化率逐渐增大,天然气中总烃含量减少,CH4比例逐渐增大,C2H6与C3H8 含量呈递减趋势。干燥系数与CO2含量呈明显的正相关关系,干燥系数与H2S含量以及CO2与H2S含量之间正相关性低,这可能是由于TSR不同阶段主要控制因素不同导致的。地质条件下,高硫化氢天然气的形成与演变很可能受控于温度、碳链长度、金属离子、水和硫化氢含量这几种主要因素。

关键词: 硫酸盐, 热模拟, 天然气, 硫化氢, 地球化学, 实验

Abstract: High H2S-bearing natural gas is usually referred to the thermochemical sulfate reduction (TSR). The thermosimulation experimental study of reaction between natural gas and magnesium sulfate is made in unsaturated water vapor of HTHP. Its possible reaction pathways are determined, and the geochemical characteristics of natural gas in TSR are presented. The possible geologic factors influencing the process of TSR are investigated. The results show that MgO, H2S, CO2 and coke are the main products of such a reaction. With the simulated temperature increasing, the degree of conversion of TSR is increasing, and the total hydrocarbon content in natural gas is decreasing, showing CH4 gas ratio is gradually increasing, accompanied by the decreasing of contents of C2H6 and C3H8 The apparent positive correlation between the gas dryness and CO2 content, the low positive correlation between gas dryness and H2S content, and CO2 and H2S content indicate there are different control factors in different stages of TSR. The study shows that the origin and evolution of high H2S-bearing natural gas are probably controlled by temperature, carbochain length, metallic ion, water content and H2S concentration in geologic settings.

Key words: sulfate, thermosimulation, natural gas, HS, geochemistry, experiment, test

中图分类号: