Research on the Identification Method of Fluvial Sandstone Reservoirs Based on U-Net Networks

With the deepening of oil and gas exploration, the exploration targets have gradually shifted from structural oil and gas reservoirs to lithological oil and gas reservoirs. The fluvial sandstone reservoir is an important type of lithological oil and gas reservoir. The fluvial sandstone presents characteristics in seismic data, such as the uneven thickness that is difficult to distinguish, the poor lateral continuity, and the strong subjectivity in tracking and interpretation, which pose great challenges to seismic interpretation work. To solve this problem, this study proposes a method for identifying channel sand bodies based on convolutional neural networks using the image semantic segmentation idea. This method mainly adopts the U-Net network structure, which can effectively combine low-resolution information and high-resolution information. The actual application effect shows that compared with traditional manual interpretation, this method has higher efficiency and accuracy.