【摘要】 渤海海域中部地区已发现的天然气主要为烃类气体,成熟度为成熟—高成熟,古近系及以下储集层中的天然气为湿气,新近系的天然气多为干气。天然气甲烷、乙烷碳同位素变化较大,其中,BZ281构造天然气甲烷碳同位素最重,QHD301构造天然气乙烷碳同位素最重。烃类气为有机成因气,可分为油型气、煤成气和混合气,以混合气为主。图2表1参9更多还原

【Abstract】 The natural gases discovered in the central Bohai Sea area are mainly composed of hydrocarbon gases, of which the gases in the Paleogene and older reservoirs are wet gases, while those in the Neogene are dry gases. The carbon isotopic compositions of the methane and ethane in the gases are greatly different.The methane carbon isotopic composition of the gases in the BZ28-1 structure and the ethane carbon isotopic composition of the gases in the QHD30-1 structure have the heaviest values, respectively. The hydrocarbon gases are of organic origin and are divided as oil type gas, coal derived gas and mixed gas with the third type being the major part.更多还原