Great Pics.
FWIW The platform on the right is a Production Platform. It separates the Water, Oil and Gas and sends the oil and gas to shore. The cleaned up water will go back into the Bay. The platform on the left is the Drilling Platform. It will have the Xmas trees and manifolds for the wells located on it along with a quarters bldg. The product will flow in piping across the bridge to the PP for separation.
The company I worked for could have built it.
Jim