可控震源激发参数优选及应用效果  

Optimization of vibroseis excitation parameters and its application effect

作　　者：邱庆良 曹乃文 白烨 QIU Qing-Liang;CAO Nai-Wen;BAI Ye(No.102 Exploration Party,Jilin Coalfield Geological Bureau,Tonghua 135000,China;No.203 Exploration Party,Jilin Coalfield Geological Bu-reau,Siping 136000,China;Geophysical Survey Party,Jilin Coalfield Geological Bureau,Changchun 130033,China)

机构地区：[1]吉林省煤田地质局102勘探队,吉林通化135000 [2]吉林省煤田地质局203勘探队,吉林四平136000 [3]吉林省煤田地质局物测队,吉林长春130033

出　　处：《物探与化探》2021年第3期686-691,共6页Geophysical and Geochemical Exploration

基　　金：吉林省地质勘查基金项目“吉林省洮南市蛟流河矿区外围煤炭资源预查”([2016]地勘20⁃03)。

摘　　要：可控震源技术在沙漠、戈壁、潜水面较深等成孔困难的地区应用较多。在野外施工过程中,选取合适的激发参数是保证地震勘探效果的必要前提。文中以J矿区煤田地震勘探为研究对象,以提高地震资料分辨率与信噪比为主要目的,对可控震源的扫描频率范围、扫描长度、驱动电平和震动台次等参数进行了实验,通过定性与定量分析相结合的手段,选取了最佳激发参数进行数据采集,获得了质量较高的地震时间剖面,展示了其较好的应用效果。结果表明:在炸药激发困难地区,应用可控震源采集技术进行煤田地震勘探是有效、可行的。Vibroseis technology is widely used in desert, Gobi and deep phreatic surface areas where drilling is difficult.In the process of field exploration, it is necessary to select suitable parameters to ensure the effect of seismic exploration.In this paper, the J mining area coal field seismic exploration was chosen as the research object and, for the purpose of improving the seismic data resolution and signal-to-noise ratio(SNR),the sweep frequency range, scanning length, driving level and vibration frequency of vibroseis parameters were tested.Through the combination of qualitative and quantitative analysis, the best excitation parameters were selected for data acquisition, and the high quality of seismic data were obtained on the seismic time profile, which shows the good application effect.The results prove that it is effective and feasible to use vibroseis acquisition technology in coal field seismic exploration in areas where explosive excitation is difficult.

关 键 词：可控震源 煤田地震勘探 分辨率 信噪比 激发参数优选 

分 类 号：P631.4[天文地球—地质矿产勘探]