中非Muglad盆地1/2/4区块白垩系构造特征与油气分布

Structural characteristics and hydrocarbon distribution of Cretaceous at 1/2/4 blocks in Muglad Basin, Central Africa

中非Muglad盆地由多个以中生代沉积为主的裂谷凹陷组成，各凹陷分割性强，有独立的构造和沉积体系。通过对Muglad盆地1/2/4区块多个构造层系的地震层位解释及构造演化剖面的制作，分析了构造演化特征、断裂特征以及油气聚集的关系。研究区发育5条较大的呈NW向展布的同沉积断裂和东部两条呈NNW向延伸的盆地边界断裂，构造格局主要受这两组断裂控制，白垩系构造格局具有继承性。东部构造带受NW和NNW向正断层控制，西部构造带主要受NW向断裂控制；东、西分带明显，具“一隆二凹两斜坡”的特征，南、北成藏具有分区特点，北部主要为Abu Gabra（AG）组及Bentiu和Aradeiba组成藏组合，南部以Bentiu和Aradeiba组成藏组合为主。Kaikang凹陷东、西两侧盆地结构及构造演化差异，造成两侧油气丰度的不同。

Through-wall imaging techniques with Ultra-WideBand (UWB) radar are promising candidates for non-destructive detection, especially in disaster areas like calamity rescue scenarios, counter-terrorism and so on. These applications always require high-resolution target imaging to identify the object shape. Based on this requirement, a complex target boundary imaging algorithm for UWB radar is proposed to realize the shape estimation and identification of the target behind walls. As the application is a near field problem, the algorithm offsets the influence from walls using the incident angle of the radar echo calculated by the time-delay difference curve, and estimates the target boundary effectively. Simulation and experimental results of targets behind walls with different shapes show that the proposed algorithm can remove the influence from walls, estimate the target boundary effectively and realize the basic target identification.