Shallow water oil-gas platform using underwater flexible storage device

Abstract

The invention discloses a shallow water oil-gas platform using an underwater flexible storage device. The shallow water oil-gas platform comprises a wellhead platform and a production module. Both the wellhead platform and the production module are provided with pile foundation parts. The pile foundation part of the production module is provided with a support base. The underwater flexible storage device fixedly connected with the production module is arranged under the production module. The underwater flexible storage device is placed on the support base, and the underwater flexible storage device and the support base are connected through a horizontal locating structure. The underwater flexible storage device comprises a sealed storage tank and a plurality of storage single bodies. The multiple storage single bodies are vertically arranged and fixedly connected in the sealed storage tank. The sealed storage tank is provided with a water pipe communicating with the outside. Each storage single body is provided with a flexible soft bag and an open type protective sleeve. Each flexible soft bag is provided with a medium loading-unloading pipeline connected with the production module. The medium loading-unloading pipelines are fixed to the open type protective sleeves respectively. The shallow water oil-gas platform is safe and environmentally friendly. The flexible soft bags are adopted for storing media to separate the media from water. The volume utilization ratio is high, and the cost is low.

Description

technical field [0001] The invention belongs to the field of offshore oil and gas development, in particular to a shallow water oil and gas platform using an underwater flexible storage device. Background technique [0002] There are two ways to carry out follow-up processing after crude oil is produced in offshore oil fields: 1) export it with submarine pipelines; 2) store it in an oil storage device and regularly transport it out with a shuttle tanker, which can be a fixed part of the production platform , can also be a single structure. If the production of an offshore oil field is not large enough, the cost of laying expensive submarine oil pipelines will outweigh the benefits. In this case, the only way to exploit it is to use some kind of low-cost but safe and reliable oil storage device. [0003] Exactly where the oil storage unit is placed matters a lot. There are only three optional positions: 1) above the waterline and fixed in the upper layer of the platform; 2)...

AI Technical Summary

Problems solved by technology

The second is heat insulation. Oil needs to be heated to keep it in a liquid state, while the water coming in from the outside is cold. Therefore, it is difficult to take heat preservation measures for crude oil when oil and water are in contact with a large area.

Third, the method cannot store water-soluble liquids such as methanol

The cement structure directly sits on the bottom, which is prone to bottom scour and hollowing out, which poses hidden dangers to the safety of the platform

Second, due to the presence of seawater ballast tanks, the overall weight of the device is increased

Third, the effective operation of the entire oil storage device depends on a complex combined pump system that can simultaneously pump and discharge the crude oil or seawater in the oil storage tank and the ballast tank. This system has potential safety hazards for long-term reliable operation.

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