摘要
南斜坡新沟嘴组原油为同一种成因类型的原油,具有较高的Pr/Ph、C2920R和伽马蜡烷/αβC30值。该区有效烃源岩主要分布在魏家场和金家场两个断背斜上,其岩石类型为泥岩、泥质白云岩和泥质灰岩,烃源岩中有机质丰度较高,处于热演化的成熟-高成熟早期阶段。油源对比表明,南斜坡Ex组原油具有双重来源,该区提供成熟-高成熟早期油,北部洼陷带提供高成熟油,两者混合后在本区Ex下Ⅱ、Ex下Ⅲ油组成藏或沿断层侧向向上运移到Ex下Ⅰ油组、Ex上段成藏。魏家场和金家场构造带具有较好的油气勘探潜力。
The oil in Ex formation of southern slope of Jianglin depression has the same origin with high Pr/Ph, C2920R, and Gammacerane/aβC30. The active .source rocks are mainly distributed in the two faulted anticlines of Weijiachang and Jinjiachang. The rock types are mudstone, argillaceous dolomite, and argillaceous limestone, and there is abundant organic matter in the source rocks which are in the early thermal evolution stage of maturity to high maturity. The oil .source correlation shows that the oil in Ex formation of the southern slope came from two places： the southern slope where matured -- highly matured oil was generated in its early stage, and the northern low--ly- ing belt where highly matured oil was generated. The mixture of the two was accumulated in Ex下Ⅱ and Ex下Ⅲ of Ex formation, or migrated upward to EXVI and Upper member of Ex formation. It is concluded that there is a great potential for oil and gas exploration in the two structural belts of Weijiachang and Jinjiachang.
出处
《江汉石油职工大学学报》
2015年第4期1-3,共3页
Journal of Jianghan Petroleum University of Staff and Workers
关键词
江陵凹陷
南斜坡新沟嘴组
油源研究
油源对比
Jianglin Depression
Ex Formation of southern Slope
Study on Oil source
Oil Source Correlation
