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Cavern nitrogen displacement method used for underground water-sealed rock cavern oil storages

A nitrogen replacement and groundwater technology, applied in storage devices, transportation and packaging, etc., can solve the problems of high cost and nitrogen consumption, and achieve the effects of reduced nitrogen consumption, high reliability and high nitrogen replacement efficiency

Active Publication Date: 2013-05-29
CHINA PETROCHEMICAL CORP +1
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Problems solved by technology

[0005] However, the existing method has the following problems: the nitrogen dilution replacement method needs to consume 2 to 3 times the nitrogen of the chamber volume
In short, the cost of these two nitrogen displacement methods is relatively high

Method used

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  • Cavern nitrogen displacement method used for underground water-sealed rock cavern oil storages
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  • Cavern nitrogen displacement method used for underground water-sealed rock cavern oil storages

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0025] Such as figure 2 with image 3 As shown, a cavern nitrogen replacement method for an underground water-sealed stone cave oil depot, the method utilizes the upper connecting roadway 6 and the middle connecting roadway 7 set between the first oil storage cavern 9 and the second oil storage cavern 5 Connect the roadway 8 with the lower part, set the closed solid wall 12 in the middle part connected roadway 7, set the closed solid wall 12 in the upper connected roadway 6 and set the double glass window 11 on the top of the wall and set the blasting device in the glass window to realize the hole The nitrogen replacement of the tank achieves the purpose of high efficiency and saving.

[0026] The present invention comprises the following steps:

[0027] 1. Preparatory work before nitrogen replacement of the hole tank, including the following steps:

[0028] (11)...

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Abstract

The invention discloses a cavern nitrogen displacement method used for underground water-sealed rock cavern oil storages and belongs to the field of petroleum storage. The method includes the steps that firstly, a middle connecting tunnel (7) and an upper connecting tunnel (6) are sealed by utilizing sealed bodies and a removable window is arranged on the upper portion of the sealed body in the upper connecting tunnel (6); then, cavern nitrogen displacement is implemented; finally, the removable window is opened so that a gas phase channel of a first oil storage (9) and a second oil storage (5) is opened. When the cavern the nitrogen displacement method used for the underground water-sealed rock cavern oil storages is used, nitrogen displacement efficiency is high due to the fact that the nitrogen flows a long tunnel. Nitrogen consumption quantity is smaller than that of an existing cavern terminal pipeline ventilation displacement method. Project quantity and construction cost are far lower than those of the existing cavern terminal pipeline ventilation displacement method. In addition, dead corners which the nitrogen can not flow do not exist when the method is used. Reliability is high.

Description

technical field [0001] The invention belongs to the field of petroleum storage, and in particular relates to a nitrogen replacement method for an underground water-sealed stone cave oil depot. Background technique [0002] Underground water-sealed stone cave oil depots have the advantages of safety, environmental protection, land saving and money saving compared with above-ground oil storage depots. It has been built for 50 years abroad, but in China, the construction of underground water-sealed stone cave oil depots has just begun. At present, the National Petroleum In the second phase of the reserve project, four underground water-sealed stone cave oil depots are under construction or in the process of preparation. The main project of the underground water-sealed stone cave oil storage tank is the underground rock cave oil storage tank (referred to as the cave tank). The oil space, its structure is as follows figure 1 As shown, there are three connecting roadways (genera...

Claims

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Application Information

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IPC IPC(8): B65G5/00
Inventor 韩钧
Owner CHINA PETROCHEMICAL CORP
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