高密度三维地震在超浅层煤田勘探中的应用  

Application of High Density Seismic Prospecting in Ultra-shallow Coalfield Exploration

作　　者：徐晓培 Xu Xiaopei(China Coal Geology Group Co.Ltd.,Beijing 100040)

机构地区：[1]中煤地质集团有限公司,北京100040

出　　处：《中国煤炭地质》2018年第12期96-101,108,共7页Coal Geology of China

摘　　要：常规三维煤田地震难以获得200ms以内的反射波,更不要说在高干扰地区识别超浅层煤矿小断层、采空区和煤层变薄区等地质体了,为了解决这类超浅层、高干扰地区煤田勘探难题,提出了采用高密度、小排列、小道距、单道采集技术,结合高分辨率、高保真、面元均化等资料处理技术解决这类地区煤田地震成像问题。实例表明:采用高密度三维地震能够获得信噪比、分辨率较高的地震成像剖面,为后期解释预测地质体异常提供真实可靠的数据基础,有利于识别小断层、采空区、煤层变薄区等地质异常体,对提高煤矿安全生产有重大意义。The conventional coalfield 3D seismic prospecting is hard to obtain reflections within 200ms,not to speak of identification of ultra-shallow coalmine geologic bodies of minor fault,gob area and coal thinning area in high interference areas.To solve this kind ultra-shallow,high interference area coal exploration hard nuts,the high density,microspread,small group interval,one channel data acquisition technologies have been adopted,combined with high resolution,high fidelity,surface elements homogenization data processing technologies can solve coalfield seismic imaging issue in such areas.Practical cases have shown that the high density 3D seismic prospecting can obtain higher signal/noise ratio,higher resolution seismic imaging sections,provide true and reliable data basis for succeeding interpretation and prediction of geologic body anomalies,in favor of to identify geologic anomalous bodies of minor fault,gob area and coal seam thinning area etc.,thus have great significance to improve coalmine production safety.

关 键 词：高密度三维地震 单道采集技术 高分辨率 面元均化 

分 类 号：P631.4[天文地球—地质矿产勘探]