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位于黄骅坳陷北大港构造带的千米桥潜山在 1 998年勘探中获重大突破 ,于奥陶系钻获高产油气流。该潜山为一古残丘背斜山 ,奥陶系上覆上侏罗统—下白垩统 ,缺失石炭 二叠系、三叠系和中、下侏罗统 ,遭受风化淋滤时间长 ,碳酸盐岩目的层中孔、缝、洞均较发育 ,油气分布在距奥陶系顶部 2 0 0m以内的风化壳储集层中 ,油源对比证实 ,油气主要来自板桥凹陷沙河街组。据目前综合分析 ,该潜山油气藏类型为受风化壳控制的带较大油环的高饱和凝析气藏。图 4参 3 (梁大新摘 )
The Qimianqiao buried hill located in the Beidagang structural zone in the Huanghua Depression made a significant breakthrough in exploration in 1998, drilling high-yield oil and gas flows in the Ordovician. The buried hill is an ancient fissure hill anticline. The Ordovician covered with Jurassic - Lower Cretaceous, Permian Carboniferous, Triassic and Middle - Lower Jurassic, weathering and leaching for a long time, The pores, seams and holes of carbonate rocks are well developed, and the oil and gas are distributed in weathering crust reservoirs within 200m from the top of Ordovician. The oil source confirms that oil and gas mainly came from Shahejie Formation of Banqiao Sag . According to the current comprehensive analysis, the buried hill reservoir type is a highly saturated condensate reservoir with a larger oil ring controlled by weathering crust. Figure 4 reference 3 (Liang Daxin pick)