油田区动力干扰波特征及其组合检波压制

The characteristics of interference waves from powered machine in oilfield and their geophone array suppression

油田区中各种油田动力设施密集,向四周传播宽频干扰,严重影响了原始地震资料的信噪比。本文从油田动力干扰波的传播特征出发,考虑干扰波随空间距离的吸收衰减因素,建立起多源干扰波同时影响时的检波器组合响应关系,在此基础上分析了线性组合、正方形组合及圆形组合在多源干扰环境中的压噪能力,进而设计出适合的检波器组合参数。用这种方法得到的组合响应特征与实际应用结果更接近,说明多干扰源时的检波器组合响应计算和组合参数的设计方法是可行的。

Various densely distributed powered machines in an oilfield can generate the wide-band interference noises and such noises are then transmitted around,as a result the signal to noise ratio of raw seismic data in the area is seriously affected.Based on the propagation characteristics of the noise from the powered machines in oilfield,the noise's absorption & attenuation factors with space and time were considered,and the geophone array response relationship with all the powered machines on (here the multi-source interference sources ) were established in this paper. The noise suppression ability of the several geophone array combinations,such as linear combination,square combination and circular combination were analyzed in the multi-source interference environment,so that the favorite geophone array parameters were designed. The array response characteristics acquired above match the field ones and it is proved that the geophone array response calculation and the array parameter design method are feasible and practical.