Ultradeep sea oil-gas field engineering development system

Abstract

The invention discloses an ultradeep sea oil-gas field engineering development system, which comprises a sea floating production device, a first-stage riser supporting photon, first-stage rigid risers, a second-stage riser supporting photon, second-stage rigid risers, underwater oil extraction equipment, an upper flexible jumper tube, a tension mooring device and a seabed wellhead device, wherein the tension mooring device comprises a tension cable and a pile foundation. Submarine oil extraction equipment is arranged on the second-stage riser supporting photon positioned 200-350 meters below the sea surface, and because of pressure reduction and temperature rise, design requirements and technical difficulty for the oil extraction equipment are reduced, and construction, installation and maintenance cost is greatly reduced. The two stages of riser supporting photons are adopted to bear the loads of the rigid risers in water stage by stage, the oversize of a single riser supporting photon is avoided, the total weight supported by the sea floating production device is effectively reduced, and design requirements on the sea floating production device are reduced.

Description

technical field [0001] The invention relates to an offshore oil and gas field development technology, in particular to an extremely deep water offshore oil and gas field engineering development system. Background technique [0002] The world's ocean depths of 3000-6000m occupy the vast majority of the ocean area, reaching 73.83%. Therefore, the development of seabed resources in extremely deep waters is an important goal pursued by contemporary high-tech. [0003] At present, relying on traditional ocean engineering equipment and ocean engineering technology, the limit water depth for the development of human ocean oil and gas resources is between 3000 and 3500m, and the development cost is huge. In addition, due to the harsh sea conditions (such as heavy rains and hurricanes) in extremely deep waters, the risk of normal oil and gas extraction operations has increased dramatically. [0004] Based on the above problems, the feasibility, safety and economic applicability of t...

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Problems solved by technology

[0003] At present, relying on traditional ocean engineering equipment and ocean engineering technology, the limit water depth for the development of human ocean oil and gas resources is between 3000 and 3500m, and the investment in development costs is huge

In addition, due to the harsh sea conditions (such as heavy rains and hurricanes) in extremely deep waters, the risk of normal oil and gas extraction operations has increased dramatically

[0004] Based on the above problems, the feasibility, safety and economic applicability of traditional offshore oil and gas engineering equipment and offshore oil and gas engineering technology in extremely deep water environment (3000-6000m) can no longer meet the requirements

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