Abstract: The self installed wellhead platform is characterized by pile legs with free lifting， which are towed by tugboats to the production site for pile production. After the end of the oilfield development lifecycle， piles can be pulled out and floated， and then towed by tugboats to the new oilfield for continued service. Compared to fixed jacket platforms， it can significantly reduce the cost of platform installation and disposal. The self installed wellhead platform has been applied in the development of Bohai Oilfield for many years， and it is the first time in the South China Sea. This article introduces that in order to overcome the extreme working conditions of typhoons in the South China Sea， it is necessary to solve many problems such as the stability of the platform in place， longdistance transportation of the platform， and fatigue resistance of the connection between the platform and the subsea pipeline and wellhead.

Key words: self installed wellhead platform, marginal oil fields, stability verification, long distance transportation