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目前有关天然气中微量元素分布研究仍处于探索阶段,相关检测技术研究匮乏。国内研究仅局限于王多义教授引进的地气测量法,但并未对硝酸捕集剂进行优选。在对不同浓度硝酸捕集剂进行优选的基础上,对天然气微量元素检测进行初步探索。通过相关实验发现:低浓度硝酸捕集剂对微量元素的捕集效果理想,其中又以15%硝酸效果最佳;现场多级捕集实验同室内小气量循环捕集实验对比,室内实验检测值更高,更接近天然气中微量元素实际值;不同地区天然气微量元素的检测对比,验证了前人有关天然气中微量元素的部分结论。但实验相关作用机理不明,微量元素的精确定量有待形成标准。其应用前景广泛,对天然气运移路径的判定、天然气藏的判寻及物探方面都具十分重要的意义。
At present, the research on the distribution of trace elements in natural gas is still in the exploratory stage, and the research on related detection technology is scarce. Domestic research is limited to the introduction of geo-measurement by Professor Wang Dao-yi, but nitric acid-capturing agent is not optimized. Based on the optimization of different concentrations of nitric acid trapping agent, the trace elements detection of natural gas was preliminarily explored. Through the relevant experiments, we found that the low concentration nitric acid trapping agent has an ideal trapping effect on trace elements, and the 15% nitric acid has the best effect. The comparison between the multi-stage trapping experiment and the indoor small trapping experiment, Higher and closer to the actual value of trace elements in natural gas; comparison and detection of trace elements in natural gas in different areas verify the previous conclusions about some trace elements in natural gas. However, the experimental mechanism of action is unknown, the exact quantitative trace elements to be formed standards. It has a wide range of applications and plays an important role in the determination of natural gas migration pathways, the discovery of natural gas reservoirs and geophysical exploration.