【摘要】 南美A区前陆盆地低幅构造由构造和沉积两种成因共同形成,低幅度构造的幅度小、圈闭面积小、识别难度大,利用常规构造解释和成图技术难以精确描述低幅度构造。文中结合该盆地斜坡带低幅度构造的特点,在前人研究的基础上,有针对性地提出了几种低幅度构造的识别方法,其中相干体方法、切片方法适用于构造运动成因形成的低幅度构造,构造剩余量方法和积分地震道方法更适用于沉积成因形成的低幅度构造。综合利用各种识别方法,提高了该区低幅度构造识别的准确率。更多还原

【Abstract】 Tectonics and sediment are the two factors for the formation of the low amplitude structure in foreland basin in A Block of South America.Due to its small scale,small trap area and difficulty to identify,the low amplitude structure can not be accurately delineated by routine structure interpretation and mapping techniques.Based on the characteristics of the low amplitude structure in the basin and the studies by other researchers,several identification methods for the structure were proposed in this paper,such as coherent volume technique and slicing technique,which fit the low amplitude structures formed by tectonic movement,and the structure residual method and the integration seismic trace method which fit the low amplitude structures formed by sediment factor.By integratedly applying the identification methods,the accuracy ratio of the identification of the low amplitude structure was raised in the area.更多还原