克拉2大气田成因讨论

介绍了塔里木盆地克拉2大气田的宏观地质背景和天然气的地球化学特征。认为气田中的天然气和地层水来源于地幔。指出克拉2大气田恰好位于构造-地球化学巨边界上,而库车坳陷深部地壳的低速高导层有利于无机油气的费托合成,库车坳陷的3条深大断裂则为流体的向上运移提供了通道。在对克拉2大气田成因的不同认识中,明确强调了它的无机成因。

A Discussion About Origin of Kela-2 Giant Gas Field

The macroscopic geologic setting and geochemical characteristics of natural gas in Kela2giant gas field of Tarim basin are presented in this paper.It is considered that both the natural gas and the formation water in this gas field are originated from the mantle.Kela2giant gas field is just located in great structural geochemical frontiers.While the low velocity layer and high conductivity formation in deep crust of Kuche depression are favorable to Fisher-Tropsch process to the inorganic hydrocarbons.Its three deep fractures offer the path that the fluid migrates upward in the de-pression.Also,this paper point out emphatically the inorganic origin of hydrocarbon in Kela2giant gas field,although there exist some different understandings of it.