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总结和评述了烃类气体非生物成因的代表性观点,以及最新的研究动态和进展。在蛇纹石化非生物成因烷烃理论的基础之上,分析了非生物成因烃类气体可能生成的地质背景。已经发现的非生物成因天然气的形成与运移,大部分都位于构造活动强烈、地质背景复杂的区域,如何将化学反应机理及其反应条件与具体的地质条件相匹配,是涉及非生物成因天然气成藏至关重要的科学问题。讨论了已有的多种非生物成因烃类气体的判别指标和划分模式,尽管甲烷δ~(13)C的典型分布区间对非生物成因烃类气体的识别非常重要,但需要结合具体的地质背景条件给予合理解释,非生物成因甲烷δ~(13)C可能具有更宽泛的分布区间。实例分析结果表明,综合利用烃类气体碳、氢同位素特征来判别烃类气体的成因具有明显的优越性。
Summarized and commented on the representative point of view of the non-biological causes of hydrocarbon gases, as well as the latest research developments and developments. Based on the serpentine abiogenic alkane theory, the possible geological background of non-biogenic hydrocarbon gases is analyzed. Most of the discovered non-biogenic natural gas formation and migration are located in areas with strong tectonic activity and complex geological background. How to match the chemical reaction mechanism and reaction conditions with the specific geological conditions is a key issue involving non-biogenic natural gas Accumulation is a crucial scientific issue. Although the discriminant index and division pattern of many existing non-biogenic hydrocarbon gases are discussed, although the typical distribution of δ 13 C in methane is very important for the identification of non-biogenic hydrocarbon gases, it is necessary to combine the specific geological Given the reasonable explanation of the background conditions, the non-biological methane δ 13 C may have a broader distribution range. The case study shows that it is obviously superior to synthetically utilize the carbon and hydrogen isotopes of hydrocarbons to discriminate the origin of hydrocarbon gases.