This looks like a cylinder on its side. There's a water droplet on the cylinder. There's a long rectangle along the bottom of the cylinder. There's four circles on the bottom of the rectangle.
This Oil Tanker icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.