摘要
在黄土塬区,选择弯线地震勘探技术,相对传统的直测线地震勘探而言,可以克服由于黄土巨厚、沟谷陡峭、黄土干燥疏松且厚度横向变化剧烈等因素造成的激发、接收困难。设计弯线地震勘探观测系统,应遵循空间、时间条件来决定叠加次数;并考虑弯线叠加特点,计算弯曲测线共反射面元属性及道距、炮间距;根据动校正拉伸畸变,速度精度要求等综合因素选择炮检距。总之,弯线地震勘探技术的关键在于共反射面元属性分析,炮检中点的分散范围、分散度等参数的计算及优化。
In loess tableland area,in respect to conventional straight-line seismic prospecting,to use the slalom seismic prospecting can overcome shotting and receiving difficulties cause by very thick loess,steep ravine,dry,loosen and violent transverse changes of loess.To design slalom seismic prospecting field setup,should based on space and time conditions to determine stacking fold;select offset should considering slalom stacking characters,calculating slalom common-reflection element property and group interval,shotpoint spacing;shot-detector distance selection based on comprehensive factors of dynamic correction stretching distortion,velocity accuracy requirement.To sum up,the key of slalom seismic prospecting technique is rest with common-reflection element property analysis,offset midpoint dispersion range,dispersion ratio calculation and optimization.
出处
《中国煤炭地质》
2006年第6期43-45,65,共4页
Coal Geology of China
关键词
共反射面元叠加
炮检中点
分散范围
叠加次数
黄土塬
弯线地震勘探
common-reflection element stacking
offset midpoint
dispersion range
stacking fold
loess tableland
slalom seismic prospecting
