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沟槽是沾化凹陷新近系重要的四级负向构造,也是该区隐蔽油藏勘探的重要方向。研究发现,该区主要发育地貌型、断裂型、斜坡型和过渡型4种沟槽类型,不同类型沟槽的成藏条件、油藏类型及成藏模式不同。其中,地貌型沟槽主要发育构造-岩性油藏,断裂型沟槽主要发育岩性及构造-岩性油藏,斜坡型沟槽主要发育岩性和地层超覆油藏,过渡型沟槽主要发育砂岩上倾尖灭和构造-岩性油藏,其成藏特征及富集程度主要受新构造运动、区域构造翘倾、充足的油气供应、岩性圈闭发育、沟槽类型和结构等因素的影响。
Trench is an important four-member negative structure of the Neogene in Zhanhua sag, which is also an important direction for concealed reservoir exploration in this area. It is found that there are four kinds of groove types, which are geomorphology type, fault type, slope type and transitional type. Different types of trenches have different reservoir forming conditions, reservoir types and reservoir forming modes. Among them, the main development of geomorphic trenches is lithologic reservoirs, the main developed lithology and tectonic-lithological reservoirs of fault-type trenches, the main developed lithologies of slope-type trenches and overlying reservoirs, transitional trenches The main developed sandstone updip pinch-out and tectonic-lithologic reservoirs are mainly characterized by neotectonic movement, regional structural tilting, abundant oil and gas supply, lithologic trap development, trench type and structure And other factors.