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作 者:刘雅利[1,2]
机构地区:[1]中国科学院广州地球化学研究所,广东广州510640 [2]中国石化股份胜利油田分公司地质科学研究院,山东东营257015
出 处:《油气地质与采收率》2009年第2期24-26,共3页Petroleum Geology and Recovery Efficiency
摘 要: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。The valley-trough is one type of fourth-order negative tectonic units and important exploration objection for subtle oil-gas reservoir in Neogene in Zhanhua Depression.There are four types of valley-troughs:geomorphology-type,fault-type,slope-type and transition-type valley-troughs.The accumulation conditions,oil-gas reservoir types and reservoir forming models are different among them.For geomorphology-type,structure-lithology reservoir mainly develops;for fault-type,structure and structure-litholoy reservoirs mainly develop;slope-type valley-trough mainly develops litholoy and stratigraphic overlap reservoir;and transitiontype valley-trough mainly develops up-pinch and structure-lithology reservoirs.Forming characteristics and enriching degree of the reservoirs in the Neogene valley-troughs are controlled by the Neotectonic Movement,region tectonic tilt,oil and gas source rocks,lithologic trap condition,type and structure of valley-trough. The research on the hydrocarbon accumulation characteristics of Neogene valley-trough has large significance for the subtle reservoir exploration in Zhanhua Depression.
分 类 号:TE112.321[石油与天然气工程—油气勘探]
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