复杂山地检波器大组合的应用  

The Application of Large Geophone Array in Complex Mountain Region

作　　者：蔡明[1] 张新东[1] 杨学彤[2] 

机构地区：[1]中国石油塔里木油田分公司勘探开发部 [2]中国石油塔里木油田分公司石化公司

出　　处：《岩性油气藏》2010年第F07期172-174,共3页Lithologic Reservoirs

摘　　要：库车坳陷中部石油地质条件优越，但由于地震资料品质差，制约了勘探进程。该区地震勘探难点主要表现在：地面山体高大、地形条件复杂、地表类型多、地震采集困难、表层结构复杂、调查建模不准、求准静校正难、激发接收条件差、资料信噪比低、构造落实难等。针对库车坳陷中部地震勘探面临的诸多难题，开展了地震采集技术攻关。检波器大组合是使用大量的检波器．并且在纵向上大量增加检波器组合基距的一种地震勘探接收技术，可以较好地压制噪声并且提高单炮资料信噪比。该技术在库车坳陷吐孜阿瓦特地区的使用，较好地提高了单炮和剖面资料信噪比，压制了侧面反射和次生干扰波，提高了弱信号的接收能力，是一种比较有效的提高资料信噪比的地震采集技术。Kuche Depression has great potential of petroleum exploration due to good geological condition. But the quality of seismic data is poor, thus it limits the exploration performing. The difficulties of seismic exploration mainly lie in the following aspacts： seismic data acquisition is hard due to high elevation of surface, many mountainous area, complicated terrestrial conditions and multiple types of surfaces; complicated surface structure, inaccurate investigation and modeling, inaccurate static-correction, poor conditions for activation of reception, low signal to noise ratio and deviated confirmation of structures. A serial innovation has been made to solve these problems. Large geophone array technology of large quantities of geophones is used and pattern length of geophones is increased greatly vertically to reduce noise and enhance signal to noise ratio of data for a single shot. The technology of large geophone array has greatly enhanced the signal to noise ratio of single shot and profile data in Tuziawt in Kuche Depression, reducing reflection wave and secondary interference wave, so as to increase the ability to receive weak signal, which is an seismic data acquisition technology that can effective enhance signal to noise ratio.

关 键 词：复杂山地 噪声 信噪比 大组合 

分 类 号：P631.436[天文地球—地质矿产勘探]