孔庆芬,张文正,李剑锋,昝川莉
Kong Qing-fen, Zhang Wen-zheng, Li Jian-feng, Zan Chuan-li
摘要:
随着靖西地区奥陶系中组合天然气勘探的突破,判识天然气成因类型、明确其主要来源成为有效指引勘探方向的关键问题。以天然气地球化学特征分析为基础,通过气—气、气—源对比、源—储—盖空间组合分析等方法,在深化高—过成熟天然气成因判别认知的同时,探讨靖西地区奥陶系天然气的主要来源。研究表明,靖西地区下古生界奥陶系天然气以煤成气为主,局部存在自生自储的油型气;对于高演化干气的成因判识,适宜选取甲烷碳同位素为主要依据。此外,本文对天然气组分碳同位素序列倒转现象提出了新的解释思路。
中图分类号:
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