【摘要】 由同沉积断裂长期活动形成的构造坡折带是控制层序发育和沉积过程的重要因素。应用构造坡折带的概念,重点探讨了早第三纪裂陷期琼东南盆地西部三维地震区的沉积体系展布特征及输导格架的特点,识别出"梳状"、"叉形"、"帚状"和"反向丁字形"4种断裂坡折带类型及其与砂体分布样式之间的关系。指出了构造坡折带常常控制着有利的输导系统的发育,而滚动背斜发育部位应是最有利的油气聚集区,构造坡折带与压力过渡带的叠合区也是有利的勘探区带。更多还原

【Abstract】 Structural slopebreak zones, which are produced by the longterm activities of syndepositional faults, have always been an important factor of the depositional sequence development and the deposition process. Based on the concept of the structural slopebreak, this paper focuses on the distribution characteristics of the sedimentary system and conduit framework. Four types of syndepositional fault slopebreak patterns are identified, which are "comblike structure", "broomlike structure", "forklike structure" and "reversing Tshaped structure". Furthermore, the relationship between the slopebreaks and the distribution patterns of the sand bodies in the Qiongdongnan basin is discussed. At the same time,the differences of their migration ability are studied simply.This paper also describes the characteristics of structural slopebreak zone in detail.It’s no doubt that the structural slopebreak always controls the development of the conduit system, the position of rolling anticline is favorable for petroleum accumulation, and the superposition area of the structural slopebreak zone and the pressure transition zone is very important for exploration in the Qiongdongnan basin.更多还原