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泌阳凹陷南部陡坡带在特殊的构造背景下,形成了扇三角洲、冲积扇和浊积扇三种砂砾岩扇体,在成因上属于冲积扇扇三角洲体系,受边界断裂活动和古隆起的双重控制,砂砾岩扇体沿边界断裂呈带状分布并遵循沟扇对应关系。扇三角洲砂砾岩体大都深入到烃源岩丰富的湖相暗色泥岩中,含油气丰富;油气成藏具有分区性,赵凹安棚区以砂岩上倾尖灭油气藏为主,栗园地区以成岩物性油气藏为主,深凹区以透镜体油藏,复合油气藏主要发育在下二门地区。
Under the special tectonic setting, the steep slope belts in the southern part of Biyang Depression formed three kinds of conglomerate fans, fan delta, alluvial fan and turbidite fan. They belong to alluvial fan-fan delta system and are double-burdened by boundary faulting and paleo-uplift Control, glutenite fan along the boundary rupture zone distribution and follow the corresponding relationship between grooved fan. Fan sandstone conglomerates in the fan delta are mostly penetrated into the mudstone of the lake facies rich in source rock, which is rich in oil and gas. The hydrocarbon accumulation is zoning. Zhaojiaochang is dominated by up-dip and dip-out of sandstone, Diagenetic petrophysical reservoirs are mainly dominated by the lens body reservoir in the deep concave area, while the compound reservoir mainly develops in Xiaermen area.