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通过对西大滩—安多油气地球化学剖面的研究表明:土壤样品酸解氢、酸解甲烷、酸解乙烷、酸解丙烷和热释汞异常的综合解释有助于对地下是否存在水合物做出推断;在烃类出现“负异常”时,可能是地下赋存水合物的标志。并结合前人文献初步建立了多年冻土区活动带天然气水合物的形成和地球化学勘查模式。分析认为土壤地球化学测量可用于在多年冻土区活动带探测水合物,但其异常解释不能完全照搬油气藏化探模式,必须把渗透性极差的冻土层对烃类气体向地表运移的影响考虑进去。
The study on geochemical profiles of the Xidatan-Ando oil and gas shows that the comprehensive interpretation of the acid, hydrogen, methane, acid-hydrolyzed methane, acid-soluble propane, and pyroxene mercury in soil samples is helpful for the hydration of underground Inferred; in the hydrocarbon “negative anomaly”, it may be a sign of underground hydrate. Based on the previous literature, the formation and geochemical exploration pattern of gas hydrate in the active zone of the permafrost region was preliminarily established. The analysis shows that geochemical measurements can be used to detect hydrate in the active zone of permafrost zone. However, the anomaly interpretation can not completely copy the geochemical exploration pattern. Therefore, the extremely permeable permafrost layer must transport hydrocarbon gas to the surface Take into account the impact of the