摘要
松辽盆地早白垩世演化主要经历了裂陷期、断陷期和断坳转换期,断陷早期沉积的沙河子组为主要生烃层系,目前断陷层发现的油气绝大部分来源于该层系。本文通过盆地演化、区域地层对比、岩石测年并结合前人研究成果,对梨树断陷早白垩世早期演化进行了重新认识,认为沙河子组一段沉积时为分隔式洼陷槽,沙河子组二段才逐渐形成统一湖盆,原划分为火石岭组洼陷火山岩之上的地层应归于沙河子组一段,其存在有效烃源岩。对该套烃源岩为中心的含油气系统研究,前期勘探没有引起足够重视,应为梨树断陷下步勘探重点关注的领域。
The evolution of the early Cretaceous in Songliao Basin experienced rifting, faulting period, fault depression conversion period, Shahezi formation sedimentation of the early fault depression is the main source rocks, at present oil discovered in the fault depression layer most came from the layer system. In this paper, with the evolution of the basin, the regional stratigraphic correlation, rock dating and combined with the results of previous studies, Reunderstanding of Lishu fault depression of Early Cretaceous evolution, K1 sh1 sedimentary is divided trough, K1 sh2 was gradually formed a unified Lake Basin, the former divided layer into Huoshiling formation on volcano rock should be attributed to the K1 sh1 layer, it developed effective hydrocarbon source rocks. Research on petroleum system as the center of the hydrocarbon source rock, Preliminary exploration has not aroused enough attention, the further exploration in the field of Lishu fault depression should focus on of the layer.
作者
张婷婷
ZHANG Ting-ting(Exploration and Development Research Institute,Northeast Oil&Gas Company,SINOPEC,Changchun 130062,Jilin,China)
出处
《吉林地质》
2019年第1期6-9,共4页
Jilin Geology
关键词
梨树断陷
火石岭组
沙河子组
地层归属
潜力研究
Lishu fault depression
Huoshiling formation
Shahezi formation
stratigraphic attribution
study on the potential
