摘要
The Mesozoic reservoirs in Zhenjing oilfield is characterized by tight reservoirs, low permeability, low abundance and large reserves. It has favorable exploration potential which is shown by the drilled high-yielding wells. Previous studies indicate that there are multiple dynamic systems for hydrocarbon migration and accumulation in the southwestern Ordos Basin. And different systems have different dynamic and carrier path for secondary migration. Through the research on buried history, mudstone compaction curve and physical property of reservoirs, it is concluded that the dynamic of secondary migration in Chang8 Member with ultra-low permeable reservoir is overlying abnormal pressure but Yan’an reservoir is buoyancy.