【摘要】 与常规处理相比,AVO反演预处理在动校正、多次波压制、保幅处理等方面要求更高。针对海上地震资料,对AVO反演预处理中的相对振幅恢复、子波处理、精细切除处理、高精度速度分析与剩余时差校正、多次波衰减、叠前去噪等主要技术进行了试验研究。在上述研究基础上,对DF11区三维地震数据体进行了处理,并对该区Ⅱ上含气砂体的空间展布进行了预测,其结果已被钻井所证实。更多还原

【Abstract】 The AVO （Amplitude Versus Offset） preprocessing is stricter than conventional processing in NMO, multiples attenuation and amplitude preservation. Aiming at marine seismic data, a trial study on the main techniques of AVO inversion preprocessing have been conducted, including relative amplitude recovery, wavelet deconvolution, refined muting, velocity analysis with high precision, residual moveout correction, multiples attenuation and prestack noise attenuation. Based on the study, the 3D seismic data volume in DF11 area has been processed, by which the spatial distribution of II₂ gas-bearing sandbody is predicted. The results have been confirmed by drilling.更多还原