摘要
本文从敦-密断裂演化的角度分析吉林东部柳河、辉桦和敦化盆地的形成、演化及其石油地质条件。根据其对盆地发育的影响,断裂活动可分为3个主要时期。初始断陷期:敦密断裂的不均衡拉张使得柳河盆地下白垩统发育较好的湖相烃源岩,而辉桦、敦化盆地则以河流相-火山喷发为主。挤压隆起期:区域白垩系全面抬升遭受剥蚀。晚期裂陷期:断裂自南西向北东裂陷,辉桦盆地形成时间可能稍早于敦化盆地,盆地内古近系厚度较大,烃源岩条件也相对较好。综合对比分析认为,辉桦及敦化盆地具较好的石油地质条件,各盆地内大规模的常规油气富集可能性较小,但油砂和油页岩等非常规油气资源具有较大的潜力,下一步区域上应将非常规油气资源作为重点勘探方向。
We discuss the formation,evolution and petroleum geological conditions of Liuhe,Huihua and Dunhua basins in eastern Jilin Province,based on the three major active intervals of Dunhua-Mishan fault.On initial subsidence period,unbalanced extending of the Dunhua-Mishan fault,the Lower Cretaceous formation in the Liuhe Basin is lacustrine source rocks,while in Huihua and Dunhua basins the fluvial-volcanic eruption deposits are the major part.On extruding and uplift period,the Cretaceous formation was lifted up and denuded.On late rifting period,the Dunhua-Mishan fault rifted from the southwest to the northeast.With thicker Paleogene formation and high quality source rocks,the Huihua Basin may form a little earlier than the Dunhua Basin.According to synthesis analysis,there is little possibility finding great scale of conventional reservoirs in each basin,the prospect of unconventional oil-gas resource（eg.oil sand,oil shale,etc） is considerable,and it can be the target of regionally further exploration.
出处
《世界地质》
CAS
CSCD
2013年第2期317-324,共8页
World Geology
基金
鸭绿江盆地探矿权有利勘探区带优化"吉林东部中
新生代盆地油气资源战略评价"(2012791)
吉林大学2011年基本科研业务费联合资助
关键词
石油地质条件
断陷盆地
断裂活动
敦-密断裂吉林段
petroleum geology
faulted basin
fault activity
Dunhua-Mishan fault
Jilin Province
