用双曲线变换滤波方法提高原始地震记录的信噪比

SIGNAL-TO-NOISE RATIO ENHANCEMENT OF SEISMIC DATA BY HYPERBOLIC TRANSFORM FILTERING

The main purpose of this paper is to provide a method for enhancing the signal-to-noise ratio for seismic data. The S/N ratio acquired in some situation,is so low that the stacked profiles are difficult,or even impossible to be interpreted. Arousing by the thought of tau-p transform which has been used to suppress noise, we have developed a new method for enhancing the signal-to-noise ratio of seismic data. In this paper,hyperbolic transform filtering method is applied to common source records to reinforce the effective reflection signal and to suppress the random noises and regular noises. The method has been verified with model records and it works well. Even when the profile is heavily distored.the method still works and high signal-to-noise ratio effective signal can also be obtained. Therefore,with the application of this method, high quality results can be acquired from the seismic data heavily affected by unfavorable receiving surface conditions.