This picture shows an offshore fixed jacket-type drilling and production platform being supported by a mobile floating platform. With a drilling rig sitting on top of the fixed platform, you are looking at situation where an oil or gas reservoir has been discovered during exploration phase.
At the field development phase, one or more platforms will be installed before production wells are drilled. After all the development wells are drilled, all the drilling equipment will be removed and the platform will become an oil and gas production platform. The mobile support platform will also be removed.
Wells drilled from offshore platforms are usually directional wells. Directional wells are directed to various parts of an oil or gas reservoir located several thousand feet below seabed using directional drilling methods. Through directional wells, petroleum engineers can produce an offshore reservoir oil and gas effectively and efficiently from wells located on one or several offshore production platforms.
By Jamin Djuang