Whole-dry type system for producing oil and gas in water and working method of whole-dry type system for producing oil and gas in water

Abstract

The invention discloses a whole-dry type system for producing oil and gas in water and a working method of the whole-dry type system for producing oil and gas in water. The system comprises a functional unit, a water platform, a water wellhead, a seabed wellhead, a rigid vertical pipe and a tension mooring rope, wherein the functional unit is fixedly mounted on the water platform and comprises a type-a unit and six type-b units; the type-a unit is a dry-type oil extraction and reinjection unit; each type-b unit is fan-shaped on the horizontal plane; and the six type-b units surround the periphery of the type-a unit and are a dry-type collecting unit, a dry-type separating unit, a dry-type pressurizing unit, a dry-type moisture compressing unit, a dry-type storage unit and a dry-type control unit respectively. Compared with a dry-type Christmas tree in water, the whole-dry type system for producing oil and gas in water has the advantages that the shapes and the designs of watertight compartments of the various dry-type units are simple, the watertight compartments are easy to construct and easy to assemble, modular construction, mounting and repair can be realized effectively, meanwhile, rational distribution on the water platform is facilitated, space of the platform is utilized fully, and stability and effectiveness of development of oil-gas fields are improved.

Description

technical field [0001] The invention belongs to an oil and gas development system in the technical field of marine engineering equipment, and in particular relates to a fully dry water oil and gas production system 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, 29-31October2013[C].), for ultra-deep water oil and gas 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...

AI Technical Summary

Problems solved by technology

[0005] First, this system only realizes the dry type of oil recovery in water, and the production and storage of oil and gas resources still depend on the auxiliary oil and gas development equipment on the sea surface, which cannot effectively improve the overall efficiency and economy of oil and gas development operations

[0006] Second, due to the dependence on auxiliary oil and gas development equipment such as floating production storage and offloading devices and semi-submersible platforms on the sea surface, the auxiliary oil and gas development equipment on the sea surface is greatly affected by the destructive environment such as wind, waves, and currents on the sea surface. The overall oil and gas development operations are still greatly affected by the sea surface environment, and the stability and sustainability of oil and gas development are poor

[0007] Third, the maintenance of the dry tree in the water requires the help of divers, the maintenance process is complicated, and the maintenance cost is high

[0008] Fourth, the shape of the wellhead cabin of this system is complex, the construction is difficult, and the space utilization rate is low when it is arranged on the underwater platform

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