可控震源在地震勘探激发条件复杂地区的应用.pdfVIP

第43 卷 第5 期 煤田地质与勘探 Vol. 42 No.5 2015 年 10 月 COAL GEOLOGY EXPLORATION Oct. 2014 文章编号: 1001-1986(2015)05-0108-05 可控震源在地震勘探激发条件复杂地区的应用 1 2 昇 2 张玉军 ，田雪丰 ，冷广 (1. 甘肃煤田地质局综合普查队，甘肃 天水741002； 2. 中国煤炭地质总局地球物理勘探研究院，河北 涿州072750) : 甘肃张掖平山湖矿区浅表层地震勘探地质条件复杂。利用可控震源激发，从能量、信噪比、频率等 方面对试验资料进行定量分析，确定适合该区可控震源施工参数：震动台次、扫描长度、扫描频率、震源 出力；针对可控震源地震资料特征，着重研究弱化初至前干扰、采取提高初至波信噪比等方法，使得单炮 初至更加容易识别；同时，采用反褶积增宽频带，从而提高地震剖面分辨率，取得了较好的地质效果。 ：地震地质条件；可控震源；施工参数；反褶积；地质效果 ：P631.4 ：A DOI: 10.3969/j.issn.1001-1986.2015.04.025 Application of vibrator in the region with complex seismic excitation conditions 1 2 2 ZHANG Yujun , TIAN Xuefeng , LENG Guangsheng (1. Comprehensive Survey Team of Gansu Bureau of Coal Geology, Tianshui 741002, China; 2. Institute of Geophysical Prospecting of China Administration of Coal Geology, Zhuozhou 072750, China) Abstract: The seismic geological conditions of shallow strata and surface are complex in Pingshanhu mining area, Zhangye, Gansu, the vibrator was used to carry out excitation, quantitative analysis was conducted for test data from energy, SNR and frequency to determine the operation parameters (vibration times, and scan length, scan frequency, source output) suitable to the area, aiming at the characteristics of seismic data of the vibrator, focusing on weakening interference before first arrivals, improvement of signal-to-noise ratio was made, making it easier to identify first arrivals of the single shot. At the same time deconvolution was adopted to widen the frequency band and enhance the resolution of seis