天然气地球科学 ›› 2020, Vol. 31 ›› Issue (4): 447461.doi: 10.11764/j.issn.1672-1926.2020.01.005
• 天然气地球化学 • 下一篇
谢增业1,2(),杨春龙1,2,董才源1,2,戴鑫3,张璐1,2,国建英1,2,郭泽清1,2,李志生1,2,李谨1,2,齐雪宁1,2
Zeng-ye XIE1,2(),Chun-long YANG1,2,Cai-yuan DONG1,2,Xin DAI3,Lu ZHANG1,2,Jian-ying GUO1,2,Ze-qing GUO1,2,Zhi-sheng LI1,2,Jin LI1,2,Xue-ning QI1,2
摘要:
中泥盆统和中二叠统是近年四川盆地天然气勘探获得重大突破的领域,但其天然气来源尚不明确,影响下一步勘探部署决策。开展了中泥盆统和中二叠统天然气地球化学、储层沥青及烃源岩生物标志物等特征的综合研究。结果表明:①中泥盆统和中二叠统天然气均属于二次裂解的干气,甲烷含量>86%,含少量乙烷、丙烷等烃类气体及少量的氮气、二氧化碳、硫化氢等非烃气体,不同区域的天然气成熟度存在差别;②天然气的δ13C1值为-35.7‰~-27.3‰、δ13C2值为-38.7‰~-26.6‰、δ13C3值为-37‰~-26.5‰、
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