Method of predicting spatial distribution of channel sand by seismic attributes

The invention discloses a method of predicting spatial distribution of channel sand by seismic attributes, which belongs to the field of oil and gas geophysical prospecting engineering. The method comprises steps: logging data and seismic data in a target reservoir area are acquired, well seismic demarcation is carried out and a target layer is determined; according to the seismic data of the target layer, a cubic spline encrypted sampling method is used to obtain a high-density seismic data volume; and according to the high-density seismic data volume and the logging data, a seismic sensitiveattribute volume and seismic attribute slices are obtained, the zero point position of the seismic attributes is determined, and the quantitative relationship between the seismic attributes and the channel sand body position and the thickness is further determined. The prediction on the spatial distribution of the channel sand by the seismic attributes changes to more accurate quantitative analysis from qualitative descr