This semi-submersible offshore oil and gas integrated platform is a multifunctional floating marine facility designed for deepwater offshore drilling, well completion, crude oil separation, natural gas processing, temporary storage and auxiliary offshore operations. Distinct from fixed jacket platforms anchored to shallow seabeds, the semi-submersible structure adopts dual buoyancy pontoons connected by vertical support columns, lifting the main working deck above storm wave ranges to eliminate wave-induced impact and maintain ultra-high stability under harsh marine weather conditions.

The whole facility integrates three core functional modules: the central drilling derrick system, topside production processing modules, and marine living & utility auxiliary areas. The towering steel derrick at the platform center serves as the core drilling execution unit, supporting full-length Drill String lowering, tripping, cementing and well stimulation work for deepwater wells. Two heavy-lift offshore cranes are symmetrically arranged on the port and starboard sides of the deck, providing 360-degree hoisting coverage for equipment replacement, pipeline maintenance and supply vessel cargo transfer. Multiple large-capacity horizontal storage tanks on the deck realize temporary storage of separated crude oil, produced water and chemical additives, matching supporting manifold pipelines, separators, compressors and solid control equipment to finish primary oil-gas-water separation on-site before transmission via submarine pipelines or shuttle tankers.

All structural steel components are coated with marine anti-corrosion heavy-duty paint, with critical underwater columns and pontoons equipped with sacrificial anode anti-corrosion systems to resist seawater erosion, marine organism adhesion and long-term salt fog corrosion. The platform adopts DP3 grade full dynamic positioning system, eliminating the need for traditional anchor mooring, enabling free relocation between different offshore blocks and adapting to water depths ranging from 200 meters to 1,500 meters. It is applicable to offshore oilfield development in the South China Sea, Southeast Asian deepwater basins, Gulf of Mexico and West African offshore fields, capable of completing full-cycle operations from exploration drilling, well cementing, workover fishing to daily production boosting. Compared with single-function drilling rigs, this integrated platform cuts overall offshore development investment by 25% and shortens field commissioning cycles, becoming the mainstream deepwater development solution for medium and large independent oil operators worldwide.