摘要
黄土塬地区黄土厚度达 4 0 0m ,由于 3个特殊界面的存在 ,导致多次波发育。该地区地震采集的难点是表层吸收衰减极为严重 ,地震波的激发是一项关键的技术。由于所获得的地震资料信噪比低 ,野外压制噪音是该区地震勘探的一个重要环节。我们采用 5井组合 ,单井小药量 2kg ,在虚反射界面下 1～ 2m处激发 ,2 0m组合基距接收的工作方法 。
The thickness of loess in loess yuan is about 400m.Data acquired in this area are rich in multiples because there are 3 specific interfaces. Absorption attenuation from surface layers gives a great challenge to seismic acquisition. The key to meet the challenge is excitation of seismic waves. In addition, noise suppression in acquisition is also important to acquired data with desired S/N ratio. Our array has 5 holes with explosive load of 5kg in each hole. Seismic waves are excited 1～2m below ghost reflection interface with grouping length of 20m. Desirable results were reached.
出处
《石油物探》
EI
CSCD
2001年第2期84-91,83,共9页
Geophysical Prospecting For Petroleum
关键词
黄土塬地区
地震勘探
采集技术
表层结构
油气勘探
loess covered area, seismic exploration, acquisition technique, surface structure, influence
