CAJ | 학술논문

天然气的组分和碳、氢同位素组成特征研究表明塔里木盆地已发现的天然气均为热解气。通过气源对比可知，该盆地东部地区的天然气主要有两种类型：1)是来自震旦纪到下古生界海相腐泥型母质的油型气，其甲烷、乙烷、丙烷δ13C值，分别为-44.5‰～ -33.8‰、 -42‰～ -28.1‰和-35.4‰～-28.4‰，其甲烷的氢同位素组成大于-200‰；2)是产自中生代陆相腐殖型源岩的煤型气，其甲烷、乙烷、丙烷的δ13C值分别为-40.5‰～-33.1 ‰、-29.7‰～ -21.3‰和 -26.3‰～ -20.3‰，其甲烷的氢同位素组成小于-200‰。将天然气的地化特征与地质背景相结合判断可知，在塔北隆起地区一些天然气藏是由成熟（高成熟）阶段的油型气与过成熟阶段的油型气混合形成，另一些天然气藏是由成熟阶段的油型气和成熟阶段的煤型气混合形成。
천연기적조분화탄、경동위소조성특정연구표명탑리목분지이발현적천연기균위열해기。통과기원대비가지，해분지동부지구적천연기주요유량충류형：1)시래자진단기도하고생계해상부니형모질적유형기，기갑완、을완、병완δ13C치，분별위-44.5‰～ -33.8‰、 -42‰～ -28.1‰화-35.4‰～-28.4‰，기갑완적경동위소조성대우-200‰；2)시산자중생대륙상부식형원암적매형기，기갑완、을완、병완적δ13C치분별위-40.5‰～-33.1 ‰、-29.7‰～ -21.3‰화 -26.3‰～ -20.3‰，기갑완적경동위소조성소우-200‰。장천연기적지화특정여지질배경상결합판단가지，재탑북륭기지구일사천연기장시유성숙（고성숙）계단적유형기여과성숙계단적유형기혼합형성，령일사천연기장시유성숙계단적유형기화성숙계단적매형기혼합형성。
Research on chemical components and isotope composition of carbon and hyd rogen of natural gases from the Tarim basin shows that all discovered gases in this basin are thermogenic.With respect to source organic matter there are two ty pes of gases: 1) the oil-type gas,which generated from Sinian to lower Palae ozoic marine source rocks with the sapropelic organic matter, with -44.5‰～-33. 8‰ of δ13C1, -42.0‰～-28.1‰ of δ13C2, -35.4‰～-28.4‰ of δ13C3, and heavier than -200‰ of δD1; 2) the coal-type gas，which generated from Mesozoic terrestrial source rocks with the humic organic matter, with -40.5 ‰～-33.1‰ of δ13C1, -29.7‰～-21.3‰ of δ13C2, -26.3‰～-20. 3‰ of δ13C3, and lighter than -200‰ of δD1. 　　Based on the geochemical characters and geological setting, Tabei uplift region is regarded as having some reservoired gas pools formed by mixed mature oil-type gas with post matured oil-type gas. Some reservoired gas pools are formed by mixed mature oil-type gas with mature coal-type gas.