在丹麦北部的陆上和海底沉积物中浅层气分布十分普遍。来自海底两个渗漏区的天然气主要由CH4和少量的N2、CO2和O2组成(表1)。样品中未检测出存在有重烃。表1海底渗漏区气体的化学成分和同位素组成Table 1 Chemical and isotopic composition ofgas from submarine seeps地点水? Shallow gas distribution is widespread in both onshore and seabed sediments in northern Denmark. Natural gas from the two seepage zones in the seabed consists mainly of CH4 and small amounts of N2, CO2 and O2 (Table 1). No heavy hydrocarbons were detected in the sample. Table 1 Chemical composition and isotopic composition of gas in the submarine seepage zone Gas from submarine seeps