Zero-pollution underwater oil storage system with oil and water displacement function

Abstract

The invention discloses a zero-pollution underwater oil storage system with an oil and water displacement function. The oil storage system comprises an oil storage cabin, a transition cabin and a seawater inlet / drain cabin which are sequentially arranged on the same horizontal plane; the oil storage cabin is communicated with the transition cabin via a communicating pipeline I, an opening end of the communicating pipeline I is arranged on the lower portion of the oil storage cabin, and another opening end of the communicating pipeline I is arranged on the upper portion of the transition cabin; the transition cabin is communicated with the seawater inlet / drain cabin via a communicating pipeline II, an opening end of the communicating pipeline II is arranged on the lower portion of the transition cabin, and another opening end of the communicating pipeline II is arranged on the upper portion of the seawater inlet / drain cabin; the seawater inlet / drain cabin is communicated with the external via a communicating pipeline III, an opening end of the communicating pipeline III is arranged on the lower portion of the seawater inlet / drain cabin, and another opening end of the communicating pipeline III is arranged on the upper portion of the seawater inlet / drain cabin. The zero-pollution underwater oil storage system has the advantages that underwater oil storage and unloading functions can be realized by an oil and water displacement method, three protection barriers for reducing oily sewage discharge can be formed by means of arrangement of the cabins with different functions, arrangement of the special pipelines, real-time monitoring by the aid of oil sensors and interactive control implemented by the aid of valves, oil and water pumps and the like, and standard discharge of replacement seawater can be implemented.

Description

Technical field [0001] The invention relates to a zero-pollution oil-water replacement underwater oil storage system, which belongs to the field of offshore oil production and storage engineering. Background technique [0002] The principle of oil-water replacement is a relatively old theory, and it is often used in the field of oil drilling and production to inject water into oil wells to increase crude oil production. The storage of offshore oil production currently uses floating storage. The mainstream large-scale production oil storage device is FPSO, which is used in the exploitation of large oil fields. However, as the history of petroleum resource development has become longer and longer, large-scale self-contained oil fields have been discovered less and less, and a large part of newly discovered oil fields belong to the category of marginal oil fields. For the development of offshore marginal oilfields, if conventional technology and equipment are used, it is difficult ...

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Problems solved by technology

[0003] At present, there is no underwater oil storage scheme similar to the oil-water replacement method in China, which is applied to related devices such as production and storage platforms in offshore oil fields, and there is no related design and application

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