川渝山地相邻工区地震勘探高效采集方法研究

Method of High-efficient Seismic Prospecting in the Adjacent Zone of Sichuan-Chongqing Mountainous Area

由于复杂环境、通讯条件、各种干扰等因素的影响,川渝山地相邻工区地震勘探采集效率一直不高。为了改变这一现状,提出使用井炮源驱动与分时协同组合激发的方式进行施工,期望提高相邻施工队作业的采集效率。首先,对川渝山地相邻工区的施工现状进行剖析,提出在不改变当前采集设备的前提下解决上述问题的方法。然后详细阐述了井炮源驱动系统和分时协同系统的总体框架、组合采集模式的施工流程以及2种常见异常情况的处理方法。现场采集结果表明,使用组合模式采集比常规采集提高炮次工作量近30%,比单独使用源驱动系统或分时协同系统分别提高炮次工作量20.3%、15.6%。该方法不仅提高了采集效率,而且避免了资料相互干扰,提高了采集质量,实现了在川渝山地相邻工区地震勘探高效采集的野外应用。

Owning to the influence of complicated environment,communication condition and various interference,the efficiency of seismic prospecting in the adjacent zone of Sichuan-Chongqing mountainous area is always low.In order to change the situation,this paper proposes a method using a combination of dynamite source-drive and time-sharing synergy to improve the efficiency of seismic prospecting in the adjacent zone.Firstly,it analyses the present situation of seismic prospecting in the adjacent zone in Sichuan-Chongqing mountainous area and proposes a method to solve the above problems without changing the current equipments.Then it expounds the overall framework of the dynamite source-drive and the time-sharing synergy system,the process of the combined mode and handling methods of two common abnormal situations in detail.The field prospecting results show that the combined mode increases the workload of shot by nearly 30%compared with the conventional mode,and increases the workload of shot by 20.3%and 15.6%compared with the individual system of dynamite source-drive or time-sharing synergy respectively.The method not only improves the efficiency of seismic prospecting,but also avoids the mutual interference of data and improves the quality of seismic prospecting.The field application of high-efficient seismic prospecting in the adjacent zone of Sichuan-Chongqing mountainous area is realized.