Inclusions Characteristics and Pool-Forming Periods of High CO₂ Volcanic Gas Reservoirs in Songliao Basin

详细信息   

• 责任者：Wei Lichun (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Lu Xuesong
• 刊名：Acta Geologica Sinica
• 出版年：2012
• 卷期：86(8)
• 关键词：二氧化碳 ; carbon dioxide ; 气藏 ; gas reservoirs ; 松辽平原 ; Songliao Plain
• 页码：p.1241-1248
• 图表：3 illus., 21 refs.
• 分类号：1003
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

On the basis of detailed observation of petrography, and this study defined the types, periods and compositions of fluid inclusions in the volcanic rocks of the Yingcheng Formation in Songliao basin, using the characteristics of fluid inclusion, homogenization temperature, gas composition and carbon isotopes. In addition, the pool-forming periods of volcanic gas reservoirs with a high content of CO₂ were analyzed. Integrated geological and geochemical evidence shows that hydrocarbon accumulation features in the volcanic CO₂-bearing reservoir in Songliao basin contain two accumulation periods characterized by successive recharging process, i. e. , sedimentary period of Quantou-Qingshankou formations and the middle-late stage of Nenjiang Formation deposition. CO₂ was recharged in the Himalaya period, later than hydrocarbon gas.