天然气地球科学 ›› 2022, Vol. 33 ›› Issue (3): 484494.doi: 10.11764/j.issn.1672-1926.2021.11.006
朱玉环1(),戴鸿鸣1,胡欣2,杜敏3,罗威1,李彦佑1,王宪峰1,南佳琛1
Yuhuan ZHU1(),Hongming DAI1,Xin HU2,Min DU3,Wei LUO1,Yanyou LI1,Xianfeng WANG1,Jiachen NAN1
摘要:
近年在川西北地区九龙山气田飞仙关组获重大突破,龙016?H2井获天然气产量131.90×104 m3/d,无阻流量270.96×104 m3/d,展示其良好的勘探开发前景,对天然气成因及来源研究可为下步扩大勘探开发成果提供地质依据。根据野外和井下样品分析化验资料,对天然气组分、碳同位素组成分析,结合烃源岩—储层沥青生物标志化合物对比,认为九龙山气田飞仙关组天然气CH4含量高,重烃C2+含量低,干燥系数(C1/C1+)大于0.99,属典型的干气,呈高演化特征;天然气δ13C1、δ13C2值较高,属于高—过成熟阶段原油裂解气和II型干酪根裂解气的混合气,且以干酪根裂解气为主;储层沥青生物标志化合物与上二叠统吴家坪组和大隆组烃源岩相似,表明九龙山气田飞仙关组天然气为混源气,来源于吴家坪组和大隆组。
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