鄂尔多斯盆地北部低信噪比资料的高分辨率处理

A high-resolution procedure of low SNR data for North Ordos basin

鄂尔多斯盆地北部地区地震地质条件复杂,造成原始地震资料信噪比低,分辨率低,前期的地震资料储层与含气性预测的成果达不到目前勘探开发的要求.本文针对鄂尔多斯盆地北部低信噪比地震资料的特点,提出了一套适合本区的高分辨率处理方法,通过解决静校正和去噪问题,应用反褶积、精细速度分析以及高精度动校正和叠加等处理技术,在保证信噪比的前提下,提高了地震资料的分辨率.

The complexity of the seismic geologic conditions in North Ordos basin is caused by low SNR and low resolution of the initial seismic data, The antecedent data of the seismic reservoir and the prognostic gas bearing result have not met the needs of exploratory development nowadays. Considered the low SNR data of North Ordos basin, a practical high-resolution processing method for this area is presented in this paper. It includs solution of static correction and noise suppression, applying deconvolution, fine velocity tuning, highprecision NMO correction and stacking. The higher resolution of the seismic data has been obtained on the premise of high SNR.