中国高含硫化氢天然气的形成及其分布

含硫化氢天然气是天然气资源的重要组成部分，也是硫磺的重要来源之一。中国高含硫化氢天然气资源丰富，主要分布在渤海湾盆地陆相地层的赵兰庄气田、罗家气田和四川盆地海相地层的渡口河、罗家寨、中坝、威远、卧龙河等气田。这些气田中硫化氢含量一般为5％～92％左右，主要分布在富含膏盐层的油气区中，硫化氢主要为硫酸盐热化学还原作用形成的，赵兰庄气田早期可能存在微生物还原作用形成的硫化氢；膏盐层的分布位置对硫化氢的生成量和形成条件具有一定的控制作用。表2参41

Formation and distribution of hydrogen sulfide bearing gas in China

The hydrogen sulfide bearing gas is the important constitute of natural gas resources, while that with high H_2S content is also one of the important sources of sulfur. The resources of natural gas with high H_2S content are very rich in China and mainly distribute in the continental gas fields of Zhaolanzhuang and Luojia, Bohai Bay Basin, and the marine gas fields of Dukouhe, Luojiazhai, Zhongba, Weiyuan and Wolonghe. The H_2S in the above gas fields, with the contents vary from 5% to 92%, mainly distribute in oil&gas areas with rich minerals of sulfate (gypsum). According to the analysis, the rich H_2S in the areas are mainly generated due to TSR. Besides, in the early forming periods of Zhaolanzhuang Gas Field, there maybe exist the H_2S that sourced from the deoxidization of microbe. Finally, it can be concluded that the distribution of evaporates has some controlling effects on the generation amount of H_(2)S and its formation conditions.