摘要：Fluid-saturated rocks are generally expected to have frequency-dependent velocities, and it is attractive to try to use this property to discriminate different fluids with seismic data. When the reservoirs are saturated with different fluid types, the magnitude of dispersion is different. In this paper, the frequency-dependent AVO inversion method is combined with the technology of Smoothed Pseudo Wigner-Ville Distribution (SPWVD), which is used for spectral decomposition intended to get the excellent time-frequency localization. We use SPWVD for spectrally decomposing post-stack seismic data to find the frequency anomalies, pre-stack CMP gathers at the location of these frequency anomalies are extracted for frequency-dependent AVO inversion. Compared the identical frequency profiles of post-stack data with the result of inversion on pre-stack data, we can eliminate the high amplitude energy group caused by elastic interfaces and reserve the dispersion anomalies resulted from dispersive interfaces. The real seismic example from XN gas field of Sichuan basin, southwest of China, proved that this method is effective in discriminating gas and water in tight reservoirs. © 2016 SEG.

ISSN号：1052-3812

卷、期、页：v 35,p3548-3552

发表日期：2016-01-01

期刊分区（SCI为中科院分区）：无

收录情况：国际学术会议论文集

发表期刊名称：SEG Techn. Program Expand. Abstr.

参与作者：Liu, Yuanyuan

通讯作者：Qin, Xilin,Zhang, Sheng

第一作者：陈双全,李向阳

论文类型：会议论文

论文概要：Qin, Xilin,陈双全,Zhang, Sheng,李向阳,Liu, Yuanyuan，The application of frequency-dependent AVO inversion in tight reservoirs area，SEG Techn. Program Expand. Abstr.，2016，v 35,p3548-3552

论文题目：The application of frequency-dependent AVO inversion in tight reservoirs area