摘要
根据中国煤炭地震勘探技术发展现状及趋势,提出了三维地震勘探技术今后应重点关注及开展研究的几个问题。提高地震勘探分辨率,首先要提高地震勘探反射波的频率,其次可考虑激发和利用低速波。采用小网格采集技术有利于小构造识别,使用该技术要考虑:一是目标地质体的大小尺度,二是针对倾斜层的最高无混叠频率,三是横向分辨率。利用多次覆盖技术提高地震波信噪比,针对地层倾角大、构造复杂地区,应使用叠前深度偏移处理技术。为提高矿藏及其构造的精细刻画与描述,改善成像质量,应加强开展单点地震勘探高密度采集技术的应用。
Based on status quo and development trend of coal seismic prospecting in China, the author brought forward some emphatic crucial parts and problems of 3D seismic prospecting need to carry out analyses for the future, To improve seismic prospecting resolution, first of all is to increase reflection wave frequency, then induce and use of low velocity waves need to be considered, Utilization of diminutive grid acquisition technique is propitious to identify minor structures. To use this technique, needs to pay attention to three aspects： target geologic body size, maximum mixing and stacking free frequency and transversal resolution, Use multiple coverage to improve seismic wave signal-to-noise ratio, as to high strata dip and complicated structure areas, prestack depth migration processing technique has to be used, For subtly depict ores and their structures, improve imaging quality, application of single-shot seismic prospecting high density acquisition technique ought to be strengthened.
出处
《中国煤田地质》
2007年第2期66-69,共4页
Coal Geology of China
关键词
地震勘探
反射波频率
小网格采集技术
分辨率
叠前深度偏移
单点地震采集技术
seismic prospecting
reflection wave frequency
diminutive grid acquisition technique
resolution
prestack depth migration
single-shot seismic acquisition technique
