Abstract: A system for hydrocarbon production comprising a host for receiving produced hydrocarbon; an offshore hydrocarbon production facility comprising: a production wellhead for connection to a subsea hydrocarbon reservoir; a production platform configured to receive produced fluid from the wellhead and being in fluid communication with the host via a long distance pipeline wherein the wellhead is local to the production platform, and the production platform is configured to process the produced fluid to provide a semi-stable oil product suitable for exporting along the long distance pipeline to the host; wherein the host is configured to store the semi-stable oil product.

Abstract: An unmanned production platform comprises apparatus for producing and processing hydrocarbons from a subsea reservoir. A storage vessel is provided in combination with and proximate to the platform, typically just outside the safety zone. The storage vessel provides storage for hydrocarbons produced at the platform and further provides a utility for use at the platform, such as chemical storage, liquid desiccant regeneration and/or seawater treatment. Typically, the unmanned production platform comprises no utilities and all utilities require for production are provided by the storage vessel.

Abstract: A system for hydrocarbon production comprising a host for receiving produced hydrocarbon; an offshore hydrocarbon production facility comprising: a production wellhead for connection to a subsea hydrocarbon reservoir; a production platform configured to receive produced fluid from the wellhead and being in fluid communication with the host via a long distance pipeline; wherein the wellhead is local to the production platform, and the production platform is configured to process the produced fluid to provide a semi-stable oil product suitable for exporting along the long distance pipeline to the host.

Abstract: A floating platform, preferably of the spar type, for treating seawater to provide prepared water for injection into a well extending through the seabed. The platform includes an elongate hull structure vertically position-able in a body of water such that the majority of the hull structure is submerged in the body of water, a deck secured to the top of the hull structure so that the deck lies above a surface of the body of water, and a chamber located within or substantially, within the hull structure so that the chamber is also submerged in the body of water and including a water inlet at a lower end of the chamber and a treated water outlet at an upper end, the chamber containing one or more cells for performing an anti-bacterial treatment on water passing up through the chamber from the inlet to the outlet. The platform further includes a pump for pumping water through the chamber from the inlet to the outlet through the cell or cells. In one configuration, the platform may be a spar platform.

Abstract: A method of producing a fluid from a hydrocarbon well, the fluid comprising an emulsion of water and oil and where the proportion of water (water cut) varies over time. The method comprises: determining whether the water cut of the produced fluid is within the oil/water inversion range; and when the water cut is within the oil/water inversion range, adding water to the produced fluid in order to increase its water cut to above the oil/water inversion range. Thus, the fluid produced transitions from the water-in-oil phase to the oil-in-water phase without (at least significantly) entering the inversion phase.

Abstract: A system for hydrocarbon production comprising a host for receiving produced hydrocarbon; an offshore hydrocarbon production facility comprising: a production wellhead for connection to a subsea hydrocarbon reservoir; a production platform configured to receive produced fluid from the wellhead and being in fluid communication with the host via a long distance pipeline wherein the wellhead is local to the production platform, and the production platform is configured to process the produced fluid to provide a semi-stable oil product suitable for exporting along the long distance pipeline to the host; wherein the host is configured to store the semi-stable oil product.

Abstract: A system for hydrocarbon production comprising a host for receiving produced hydrocarbon; an offshore hydrocarbon production facility comprising: a production wellhead for connection to a subsea hydrocarbon reservoir; a production platform configured to receive produced fluid from the wellhead and being in fluid communication with the host via a long distance pipeline; wherein the wellhead is local to the production platform, and the production platform is configured to process the produced fluid to provide a semi-stable oil product suitable for exporting along the long distance pipeline to the host.

Abstract: An unmanned offshore wellhead platform 10 for use in the oil and gas industry, the platform comprising: riser hang-off equipment 13 for connection to at least one riser for flow of hydrocarbon fluids from at least one well; and process equipment 14 for processing the hydrocarbon fluids to produce processed or part processed hydrocarbon fluids for storage and/or transport to another installation, wherein all of the process equipment 14 is on a single process deck 12 of the platform 10.

Abstract: An offshore hydrocarbon processing facility (2) comprises an offshore floating structure (8) and a submerged floating riser deck (10). The submerged floating riser deck is operatively connected to a subsea hydrocarbon riser (12). Hydrocarbon processing equipment (26) is disposed on the submerged floating riser deck. The offshore floating structure (8) may be connected to the submerged floating riser deck (10) using a riser (16) that can be disconnected if there is inclement weather.