渤海湾盆地渤中19-6气田凝析气成因研究
Origin of Condensate Gas in Bozhong 19-6 Gas Field in Bohai Bay Basin
投稿时间:2019-11-18  
DOI:10.11908/j.issn.0253-374x.19476     稿件编号:    中图分类号:T122
 
摘要点击次数: 22    全文下载次数: 21
中文摘要
      为了研究渤中19-6凝析气藏的成因类型,利用同位素、轻烃参数、金刚烷参数等方法,系统分析渤中19-6凝析气藏,深入研究其形成机理,认为:渤中19-6气田天然气干燥系数较低,碳同位素偏重,成熟度分布在1.50 %左右,综合判断属于偏腐殖型高熟气;渤中19-6气田凝析油双金刚烷含量较高,生物标志化合物含量较低,指示渤中19-6气田凝析油为高成熟原油,且计算原油裂解程度低于20 %,对天然气的贡献量有限,渤中19-6气田天然气主要为干酪根裂解形成。
英文摘要
      In order to analyze the genesis and source of Bozhong 19-6 gas condensate reservoir, the genesis and gas-oil relationship of Bozhong 19-6 gas reservoir were analyzed using a series of isotopes, light hydrocarbon parameters, and biomarkers.The results show that Bozhong 19-6 gas field has a low drying coefficient, a heavy carbon isotope, and a maturity distribution of about 1.50 %, representing a hybrid origin and high-mature gas. The content of dicamantane in the condensate from Bozhong 19-6 gas field is high whereas the content of biomarkers is low, showing a characteristic of high-mature oil. This indicates that the cracking degree of normal oil amounts is lower than 20 %. The contribution of natural gas produced from cracking of crude oil is small. The gas in Bozhong 19-6 gas field is mainly formed by kerogen cracking.
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