摘要
研究能较好区分东海盆地丽水凹陷古新统3套烃源岩的生物标志化合物,明确了3套烃源岩对不同含油气构造的贡献,分析丽水凹陷LS36 1构造的油气源关系。建立了LS36 1构造多源油气的多期成藏模式,认为古油藏的油气主要来自月桂峰组烃源岩,现今油藏的凝析油主要来自灵峰组烃源岩,其次为月桂峰组、明月峰组;烃类气体主要来自月桂峰、明月峰组,CO2气体属典型的幔源气。玉泉-钱塘期强烈的构造运动非常不利于丽水凹陷早期油气藏的保存,近生烃凹陷继承性较好的构造应是寻找优质大中型油气田的首选。
Three sets of Paleocene source rocks are recognized in the Lishui 36-1 structure in the Lishui Sag,East China Sea. Biomarker suggests that oil and gas in the structure are from multiple sources and they accumulated during separate geological times. The biomarker series distinguish three Paleocene sources for the Lishui Sag: ①The ancient oil and gas pools are predominantly from the Yueguifeng Formation; ②The present pools are primarily from the Lingfeng Formation, with minor components from the Yueguifeng and the Mingyuefeng Formation; ③The hydrocarbon gas in the present pools are mostly from Yueguifeng and Mingyuefeng Formation, and the CO_(2) gas is of mantle source. The Yuquan-Qiantang tectonics had unfavorable impact on the preservation of the early oil and gas pools. The large structures close to the source rocks should be more prolific targets for future exploration.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第6期29-31,共3页
Petroleum Exploration and Development
