摘要
梁古1井二氧化碳气的发现,揭示了二氧化碳气已成为临清坳陷重要的勘探领域,根据梁古1井实测的气体组份特征、二氧化碳碳同位素和R/Ra等资料,结合对二氧化碳气的研究成果,以及该区的地质构造条件,分析认为梁古1井的二氧化碳气属岩浆-幔源无机成因,地层水的测试结果也充分说明了上述结论的正确性。该区岩浆活动剧烈,气源充足;深部通道断裂发育,浅部输导系统畅通;上第三系和上古生界是两套较好的区域性盖层,封盖条件有利;由断裂控制的构造圈闭发育,为二氧化碳气的聚集成藏提供了有利的场所。因此,该区具有形成一定规模二氧化碳气的有利条件,勘探潜力较大。
The carbon dioxide gas has been a very important exploration target in the Linqing depression since it was discovered in Well Lianggu1. According to the observed gas component, carbon isotope and the value of R/Ra, together with the research results of carbon dioxide and the regional tectonic settings of this area, the carbon dioxide in Well Lianggu1 is attributed to volcanicmantle inorganic genetic gas. And this conclusion is also proved by the results tested from the formation water. The source of gas in the area is ample for the violence of magmatic activity. The deepseated faults as channels of gas migration are well developed, and the upper carriers are expedite each other. Neogene and Upper Palaeozoic in the area are good regional cap rocks seal gas. The structural traps controlled by faults are well developed and provide enough space for the accumulation of carbon dioxide gas. So, the Linqing depression is favorable for accumulating carbon dioxide gas with great potential.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第5期518-522,共5页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
临清坳陷
幔源—岩浆
二氧化碳
碳同位素
Linqing depression
volcanic-mantle
carbon dioxide
carbon isotope
