摘要
目的研究鄂尔多斯盆地中生界石油运移通道,总结油气富集规律。方法利用渗透性砂体分布、原油结构变化、沥青元素组成及碳、氢同位素特征,研究鄂尔多斯盆地中生界石油运移通道。结果三叠系延长组主要以渗透性砂体作为油气运移通道,油藏主要分布在生烃中心及周边地区;三叠系顶部不整合面和侏罗系古河道砂体共同构成了侏罗系油藏的油气主要运移通道,其油气主要分布在侏罗系古河道内及其不整合面附近。结论运移通道控制了油气的成藏规模和富集场所。
Aim To study the petroleum migration pathway and enrichment regulation of Mesozoic in Ordos Basin. Methods Studying petroleum migration pathway of Mesozoic in Ordos Basin based on permeable sandstone＇s distribution, structure of crude oil, asphahene element＇s constitution, hydrogen isotope characteristics. Results Permeable sandstone is the main petroleum migration pathway of Yanchang Formation in Triassic period, and oil reservoir distributes chiefly at hydrocarbon generation center or regions around it. Surface of unconformity and ancient stream channel sandbody of Jurassic constitute the major migration pathway of the Jurassic, the oil reservoir accumulated primarily in the ancient stream channel and places near the surface of unconformity. Conclusion It is the migration pathway that controls the oil pool scales and the position of accumulation.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第5期628-632,共5页
Journal of Northwest University（Natural Science Edition）
关键词
二次运移
不整合面
断裂
运移通道
鄂尔多斯盆地
secondary migration
surface of unconformity
fracture
migration pathway
Ordos Basin
