摘要
在六盘山盆地新生界清水营组石膏中发现了大量的油气包裹体,而油气包裹体的研究对认识盆地新生界油气成藏条件,拓展盆地油气勘探思路具有重要的意义.通过野外地质调查、样品采集和分析测试等手段对清水营组石膏中油气包裹体的发育特征和组成特征进行研究,并开展油源对比,分析油气包裹体中油气的来源和形成过程,探讨了六盘山盆地新生界油气成藏条件和运聚特征.结果表明:清水营组结晶状石膏中油气包裹体中原油来源于清水营组烃源岩;纤维状石膏脉中油气包裹体原油来源于白垩系马东山组烃源岩.六盘山盆地清水营组泥岩具有生烃潜力,是盆地潜在的烃源岩;白垩系烃源岩生成的油气可以沿着断裂等输导体系向上覆地层运移,并在新生界聚集,沟通白垩系烃源岩断层附近的新生界圈闭是六盘山盆地有利的油气聚集区.
A large quantity of hydrocarbon inclusions were found in the gypsum of Cenozoic Qingshuiying Formation in Liupanshan basin,which is of a crucial significance to the understanding of the oil and gas reservoir-forming conditions and the development of exploration concept.Development and composition features of hydrocarbon inclusions in gypsum of Qingshuiying Formation were studied by field geological investigation,sample collection and laboratory analysis,etc.Sources and formation of the oil and gas were analyzed by oil-source correlation,and then the conditions and characteristics of petroleum accumulation in Cenozoic of Liupanshan basin were studied.The results show that the oil in the crystal gypsum was derived from the hydrocarbon source rock of Qingshuiying Formation,while the oil in the filament gypsum was derived from the hydrocarbon source rock of Cretaceous Madongshan Formation.The hydrocarbon source rock of Qingshuiying Formation has certain hydrocarbon generating potential,which is the potential source rock in Liupanshan basin.The oil and gas was derived from the Cretaceous hydrocarbon source rock,which can migrate to the upper formation along the fault,and accumulate in Cenozoic.The reservoir traps near the faults connected to the Cretaceous source rock are the favorable oil accumulation zones in Cenozoic.
作者
吴小力
李荣西
胡建民
刘福田
赵帮胜
覃小丽
Wu Xiaoli;Li Rongxi;Hu Jianmin;Liu Futian;Zhao Bangsheng;Qin Xiaoli(School of Earth Science and Resources,Chang’an University,Xi’an 710054,China;Institute of Geomechanics,CAGS,Beijing 100081,China)
出处
《地球科学》
EI
CAS
CSCD
北大核心
2020年第1期303-316,共14页
Earth Science
基金
国家自然科学基金项目(No.41772118)
中央高校基本科研业务费专项资金项目(Nos.300102279106,300102278107).
关键词
油气包裹体
烃源岩
油源对比
新生界
六盘山盆地
石油地质
hydrocarbon inclusions
hydrocarbon source rocks
oil-source correlation
Cenozoic
Liupanshan basin
petroleum geology
作者简介
吴小力(1989-),男,讲师,从事沉积学及油气成藏地质学研究.ORCID:0000 0002 5622 0059.E mail:wxlgeo@163.com
