摘要
在地震勘探中,鄂尔多斯盆地伊陕斜坡苏里格西地区的第四纪小型河湖沉积盆地会产生一种强干扰波.为了探索该干扰波特征及形成机理,通过对大量的试验资料对比分析,综合研究了该沉积体的沉积规律、岩性特征及干扰波速度特点,频谱特性和时距曲线.结果表明,该干扰波形成机理有如下特点：（1）该干扰波能量强,呈＂八字胡＂状;（2）该沉积体为第四纪河湖相沉积,岩性、速度成层分布,是形成该干扰波主要原因;（3）该干扰波频谱在0~300 Hz,近道主频在50 Hz,中道主频在65Hz,远道主频在20Hz,第270道高频主瓣在870ms,中低频主瓣在920ms;（4）干扰波时距曲线为双曲线.
In seismic exploration,Quaternary sediments small basin of rivers and lakes of Sulige west area in Yishan slope of the Ordos Basin produces a strong interference waves.In order to explore the characteristics and formation mechanism of wave interference,through the comparative analysis of a large number of experimental data,comprehensively studied the laws of the deposition of sedimentary bodies, lithology and interference wave velocity characteristics,spectral characteristics and time-distance curve.results show that the interference wave formation mechanism has the following characteristics：（1）the interference wave energy is strong,was ＂character moustache＂shape;（2）the body of the Quaternary fluvial sedimentary facies,lithology,velocity layering distribution,is the main reason for the formation of the interference waves;（3）the interference wave spectrum 0~300 Hz,frequency of near trace at 50 Hz,middle trace at 65 Hz,far trace at 20 Hz,high-frequency mainlobe the 270 seismic channel at 870 ms,middle-frequency and low-frequency mainlobe in 920 ms;（4）the interference wave time distance curve is hyperbola.
出处
《地球物理学进展》
CSCD
北大核心
2015年第6期2820-2826,共7页
Progress in Geophysics
关键词
鄂尔多斯
伊陕斜坡
沉积河湖盆地
干扰波
小型
双曲线
Ordos Basin
Yishan slope
sedimentary basin of lakes and rivers
interference wave
small
hyperbola
