【摘要】 二维三分量地震勘探采用纵波激发,三分量检波器接收P波和S波。在设置采集参数时,充分考虑P波和S波的传播特性,利用P波和S波的AVO响应确认炮检距,综合应用CCP和CMP获得排列长度和道距;在野外施工时根据横波波长短、信号弱的特点,选择较大的药量激发,并且改进接收方式,以获得更大的S波响应。由于S波受近地表影响严重,故采用小间隔多点调查,获得了更准确的S波静校正。通过对采集方法的探讨,广安构造二维三分量资料采集获得了较好的效果,为后期研究该地区的地下地质特征提供了依据。更多还原

【Abstract】 In 2D 3-component (3C) geophysical prospecting, P-wave charge is adopted and P-and S-wave are received by 3C geophone. When acquisition parameters are set, the propagation characteristics of P-and S-wave may be fully considered, the offset is confirmed by P-and S-wave AVO response, and spread length and trace offset are gained by both CCP and CMP. Based on wave length and weak signal of S-wave, more charge is chosen and receiving patterns are improved in order to get a longer S-wave response in field operation. Due to S-wave affected by near surface seriously, a multipoint examination in small space is used so as to obtain more accurate S-wave static correction. Through studying acquisition methods, better results have been obtained by 2D 3C seismic acquisition in Guangan Structure and they also provide a basis for the subsurface geology research in the area.更多还原