南美前陆盆地斜坡带低幅度构造的识别方法
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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。
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.
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.
引文
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[2]谢结来,曹强,于京波等.阿尔及利亚大深度低幅度构造地震解释技术应用及效果.石油地球物理勘探,2008,43(增刊1):108～114
[3]Geological Institute,ETHZentrum,Sonneggstrasse5etc.Hydrocarbon source potential of the Santiago For-mation Oriente Basin,SE of Ecuador.Journal of South American Earth Sciences,2008(25):145～156
[4]Warren T P,Pablo D,Miguel P.An autochthonous geological model for the eastern Andes of Ecuador.Tectonophysics,2005,3:251～278
[5]陈洪涛,王迪强,李玉梅等.滨里海盆地东缘东南区块速度场研究与应用.石油地球物理勘探,2007,42(增刊):26～29
[6]王兴军,满益志,刘昌国等.低幅度构造变速成图技术.石油地球物理勘探,2008,43(增刊1):69～72
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