板桥凹陷隐蔽油气藏类型及特征研究

Research on the types and characteristics of subtle reservoir formation in Banqiao sag

板桥凹陷内断陷结构发育完善,具有凹深、坡广、断裂多、不整合面多的地质结构,并且发育了多种类型的砂体。在对各类型砂体与构造地质相匹配关系的研究中,发现多种隐蔽油气藏类型,对该地区隐蔽油气藏归纳为3类6种:砂体尖灭油气藏、孤立砂体油气藏、断层岩性油气藏、斜坡带地层超覆油气藏、古地貌油气藏、复合型油气藏,并对各类隐蔽油气藏的特征进行了研究。

The fault depression structure developed well, and had deeper depression, wide slope, many faults, lots of unconformity and many kinds of sandstone body in Ban-qiao sag. Studying the relationship between various kinds of sandstone body and structural geology, the subtle oil -gas reservoir have been found, which can be classified three types and six kinds: sandstone pinch out reservoir, isolated sandstone reservoir, fault lithologic reservoir, slope belt stratigraphic overlap reservoir, palaeo geomor-phology reservoir, complex reservoir. This article has also analyzed the characteristics of each subtle trap in Ban-qiao sag.