Abstract: A system for developing offshore hydrocarbon fields includes a floating hydrocarbon processing unit moored to the seabed and connected to a hydrocarbon reservoir via a riser and a wellhead on the seabed, the unit receiving and processing the hydrocarbon mixture received from the reservoir via the riser, and having equipment to separate the hydrocarbon mixture into oil, water and gas and store them in storage tanks. A gas storage buffer reservoir is placed at a distance from and isolated from the hydrocarbon reservoir. A gas export riser is connected to the floating hydrocarbon processing unit and the gas buffer reservoir to export separated gas and inject it into the gas buffer reservoir. A gas riser has one end connected to the gas buffer reservoir and another end connected to the floating gas processing unit for processing gas received from the gas buffer reservoir for enabling transportation to shore.

Abstract: A system for developing one or more offshore hydrocarbon fields includes at least one floating hydrocarbon processing unit moored to the seabed and connected to a hydrocarbon reservoir via a riser and a wellhead on the seabed, the unit receiving and processing the hydrocarbon mixture received from the reservoir via the riser, and having equipment to separate the hydrocarbon mixture into oil, water and gas and store them in storage tanks. A gas storage buffer reservoir is placed at a certain distance from and isolated from the hydrocarbon reservoir. A gas export riser is connected to the floating hydrocarbon processing unit and the gas buffer reservoir to export separated gas and inject it into the gas buffer reservoir. A gas riser has one end connected to the gas buffer reservoir and another end connected to the floating gas processing unit for processing gas received from the gas buffer reservoir for enabling transportation to shore.

Abstract: An apparatus for off-shore processing of a hydrocarbon stream, at least comprising: a jack-up platform; one or more jack-up legs rootable to a sea-bed; and one or more hydrocarbon stream processing units on the jack-up platform.

Abstract: Offshore platform comprising a bottom structure (1) comprising a polygonal base (5) resting on the sea floor (2) having suction piles (10) joined to its corners and a first support frame (8) connected to the polygonal base (5) including interconnected open-ended pipes (15), conductors (33) extending from above the water surface (36) into the seabed through the open-ended pipes (15) of the first support frame (8), and at least one further support frame (22, 24) including interconnected open-ended pipes (25) extending around the conductors (33), wherein each further support frame (22, 24) is secured to the conductors (33) at a predetermined level.