Shale-Gas Reservoir Characterization Based on Quantitative Seismic Interpretation by Using Anisotropic Seismic Attributes

Summary This paper presents a case study of brittleness and organic-matter contents (OMC) quantitative seismic interpretation based on an anisotropic AVO inversion scheme and an improved statistical quantitative interpretation method. The target is a lower Silurian-age shale-gas reservoir formation with strong anisotropy in southern Sichuan Basin. In this case, the anisotropic inversion can be more robust than conventional isotropic inversion. The capability of anisotropic and isotropic attributes in brittleness and OMC interpretation are quantitatively compared by well log analysis. Besides, lithology recognition is combined with brittleness and OMC interpretation to reduce the non-uniqueness of the results. The results show that the predicted brittleness and OMC match well with the observations from well-log.