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近年来,随着鄂尔多斯盆地苏里格气田开发规模的不断扩大,全数字三维地震得到广泛应用,而数字检波器的高灵敏性使得地震资料噪声极其发育。因此,全数字三维地震资料叠前去噪是资料处理的关键。本文针对全数字三维地震资料的特点,主要采用了三维非线性面波去除、区域异常噪音分频衰减、50Hz工业电干扰消除、叠前三维f-x域相干噪音消除等去噪方法。处理结果表明,提出的去噪方法具有去噪能力强、振幅保真性好等特点,应用效果明显。
In recent years, with the continuous expansion of the Sulige gas field in the Ordos Basin, all-digital three-dimensional earthquakes are widely used, while the high sensitivity of the digital geophones makes the seismic data extremely developed. Therefore, the pre-stack denoising of all-digital 3D seismic data is the key to data processing. In this paper, based on the characteristics of all-digital 3D seismic data, three-dimensional non-linear surface wave removal, regional noise attenuation, 50Hz industrial interference elimination and pre-stack three-dimensional f-x domain coherent noise elimination methods are mainly used. The processing results show that the proposed denoising method has the advantages of strong denoising ability and good amplitude fidelity, and the application effect is obvious.