惠民凹陷构造样式及分布规律研究

综合应用钻井和测井等基础地质资料,对惠民凹陷区内的三维和二维地震剖面进行了精细解释,分析了构造几何学特征。以盆地形成和演化的构造背景为基础,对惠民凹陷发育的五大类主要构造样式(滚动构造、岩浆底辟构造、披覆构造、断块构造、滑动断阶)进行了研究。滚动构造受近南北向拉伸作用和地层本身重力的双重影响,主要发育在大型断裂带主断层下降盘弧形内弯处(如临商断裂和夏口断裂);惠民凹陷火成岩的分布受北东、北西和东西向3组深大断裂控制,岩浆底辟构造和火成岩披覆构造发育的主要构造带位于两组断裂的交会部位(临南洼陷东部和阳信洼陷东部);潜山披覆构造受古构造及潜山带分布控制,继承发育了基底古生界隆起及中生界断块山的中央隆起带,主要发育古近系披覆背斜构造,在南部燕山期形成的宽缓褶曲背景上,主要发育古近系潜山披覆断鼻,缓坡带的东部主要发育潜山披覆断块构造;惠民凹陷北部陵县—阳信铲式大断层控制了滑动断阶构造的分布,基山、阳9等陡坡带发育同向滑动断阶构造,在阳信、滋镇洼陷等缓坡带的孔店组—沙河街组四段(沙四段)主要发育反向滑动断阶构造。

Study on structural styles and distribution of Huimin Depression

By integrated application of drilling,logging and other basic geologic data of Huimin Depression,the 3D and 2D seismic sections were finely interpreted,and the structural geometry features were analyzed.Based on the tectonic setting of basining and evolution, the five main structures developed in Huimin Depression(including the rolling structure,magmatic diapir structure,drape structures, fault-block construction and sliding off) have been studied.Rolling structure is impacted by both north-southern stretch...