Underwater modular oil-gas production platform and working method thereof

Abstract

The invention discloses an underwater modular oil-gas production platform and a working method thereof. The production platform comprises upper function modules, lower platform modules, a rigid bridge pipe, a rigid vertical pipe, a mooring cable and a subsea wellhead. The upper function modules comprise the extraction and reinjection module, the gathering module, the separation module, the crude oil preprocessing module, the natural gas preprocessing module, the natural gas early refrigerating compression and output module, the crude oil storage module, the crude oil pressurization output module and the control center module. The lower platform modules comprise the mooring module, the subsea wellhead module and the ballasting module. The underwater modular oil-gas production platform is divided into the modules according to functions and shapes, so that a clearer concept is provided for construction and installation of the underwater production platform; and each module is simple in shape, the modules are constructed simultaneously, the whole construction period is shortened, and the construction economical efficiency is improved. The low platform modules are assembled on the land while the upper function modules are installed underwater separately, and the platform has remarkable advantages.

Description

technical field [0001] The invention belongs to the technical field of marine engineering equipment, and in particular relates to an oil and gas production platform in water and a working method thereof. Background technique [0002] With the continuous development of offshore oil and gas extraction technology, the field of oil and gas extraction has gradually expanded to deep water and even ultra-deep water areas. [0003] In the article "Steps to the Subsea Factory" (O.Φkland, S.Davies, R.M.Ramberg, H.Rognφ, Statoil. Offshore Technology Conference, Rio de Janeiro, 29-31 October 2013[C].), for ultra-deep water oil and gas For development, Statoil put forward the concept of an underwater factory. The design concept of the underwater factory is to use the seabed as a supporting platform, and place all oil and gas development equipment on the seabed, so that the entire oil and gas development process can be carried out on the seabed, thereby improving Stability and economy of...

AI Technical Summary

Problems solved by technology

[0005] First, due to the large number of underwater platforms, the construction and installation period of the entire system is too long, which is not conducive to the economics of oil and gas development

[0006] Second, since the production equipment is fixed on the underwater platform, underwater robots need to be used for maintenance during maintenance. The process is more complicated and the maintenance time is longer, which will have an adverse lag effect on oil and gas extraction.

[0007] Third, the flexible jumper pipes between platforms require a large amount and high cost, which increases the cost of oil and gas development

[0008] Fourth, it is difficult to connect the flexible jumper pipes between the platforms, it is easy to fail, and it is easy to interfere or even collide with each other

[0009] Fifth, the system contains more than three underwater platforms, requiring more mooring systems in the water, which increases the related installation costs

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