Molecular Geochemistry of Solid Bitumen-Bearing Carbonate Reservoir Rocks from the Puguang Gas Field and Nearby Areas

详细信息   

• 责任者：Jin Xiaodong (Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Pan Changchun
• 刊名：Geochimica
• 出版年：2012
• 卷期：41(4)
• 关键词：沥青 ; asphalt ; 碳酸盐岩储集层 ; carbonate reservoirs ; 四川盆地 ; Sichuan Basin
• 页码：p.293-302
• 图表：4 illus., 2 tables, 24 refs.
• 分类号：1003
• issnNo：ISSN0379-1726
• isbnNo：CN44-1398/P

摘要

Free and inclusion oils were recovered by sequential extraction from 15 solid bitumen-bearing carbonate reservoir rocks in the Puguang gas field and nearby areas, and then pyrolysates of the solid bitumens from these samples were obtained via confined pyrolysis experiments （gold capsules）. Based on various molecular parameters, it is suggested that the oils of paleo oil reservoirs probably had different sources. The early charged oils were derived from the Lower Devonian source rocks and had lower gammacerane contents and higher maturity, while the late charaged oils were derived from the Upper Permian source rocks and showed higher gammacerane contents and lower maturity. The solid bitumens were mainly generated from the cracking of the late charged oils.