Semi-submersible type production platform of reservoir oil positioned below water surface

Abstract

The invention discloses a semi-submersible type production platform of reservoir oil positioned below a water surface. The semi-submersible type production platform comprises an annular buoyancy tank, a box-shaped deck and at least three upright posts, wherein the annular buoyancy tank is internally provided with a water ballast tank, an oil storage compartment and a pump compartment; the box-shaped deck is provided with an oil-gas processing system, well drilling equipment, a positioning mooring system and a moon pool and internally provided with a production function compartment and a well drilling equipment compartment; and the annular buoyancy tank is connected with the box-shaped deck through the upright posts. The semi-submersible type production platform has an oil-gas production function, a storage and transportation function and a well drilling function, can be removed and reused, is flexible and suitable for the early pilot production and a deepwater oil field and bore well development, can be used effectively lowering the economic risk of the development of a deepwater oil and gas field, has more excellent motion performance compared with a ship form and a circular platform by adopting a semi-submersible type platform structure form and can meet the requirement for simultaneous performance of platform well drilling and production operation under the conditions of harsh marine environments, i.e. the South China Sea and the like.

Description

technical field [0001] The invention relates to a semi-submersible production platform for oil storage below the water surface, in particular to a semi-submersible platform capable of drilling, production and oil storage at the same time. Background technique [0002] With the continuous expansion of the scale of human development of offshore oil and gas, the main battlefield of offshore oil and gas exploration and development has shifted to the deep sea. Due to the uncertainty of geological reservoirs and the high cost of traditional deep-water oil and gas development facilities, the development of deep-water oil and gas fields is highly risky. In order to reduce the economic risk of deep-water oil and gas field development projects, the new type of deep-sea gas field development engineering facility floating drilling, production storage and offloading (FDPSO) has become a research hotspot. It is a floating production system with integrated functions of heating, heating, co...

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Problems solved by technology

[0004] Compared with ship-shaped and cylindrical production facilities, semi-submersible platforms have the advantages of adapting to harsher marine environmental conditions, excellent motion performance, and large operating climate window. However, traditional semi-submersible platforms generally only have the functions of drilling and oil and gas production, without oil storage and oil unloading functions, the semi-submersible FDPSO with integrated oil storage, drilling and production functions will provide a new option for the future development of offshore oil and gas fields

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