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Oil-water replacement process for crude oil storing and discharging of single-column platform

An oil-water replacement and single-column technology, applied in the field of offshore oil engineering, can solve the problems of high investment costs, achieve the effects of avoiding pollution, reducing project investment costs, and simple operation and control

Inactive Publication Date: 2016-08-31
CHINA NAT OFFSHORE OIL CORP +2
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  • Abstract
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AI Technical Summary

Problems solved by technology

The above development model requires two monomer structures, so the investment cost is relatively high
In order to overcome the above shortcomings, it will be more economical to adopt the improved single-column platform development model integrating drilling-oil production-oil storage-unloading; but using the floating structure of the single-column platform to store and unload crude oil requires a set A complete process can meet the needs of offshore oilfield development and environmental protection

Method used

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  • Oil-water replacement process for crude oil storing and discharging of single-column platform

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Embodiment Construction

[0032] Such as figure 1 Shown, the present invention adopts following method:

[0033] 1. Fill the oil storage tank 1 and the water settlement tank 2 with water

[0034] 1. When the single-column platform is installed in place, seawater enters the water settlement chamber 2 from the outer water pipe 6 under the action of seawater static pressure;

[0035] 2. According to the principle of the connector, the oil storage tank 1 and the water settlement tank 2 are connected to the sea through the inner water pipe 5 and the outer water pipe 6. Under the action of gravity, the seawater in the water settlement tank 2 enters the oil storage tank 1 through the inner water pipe 5 ;

[0036] 3. The air in the oil storage tank 1 is discharged through the exhaust pipeline provided by the oil inlet pipeline;

[0037] 4. After the oil storage tank 1 is filled with seawater, the seawater will accumulate in the water settling tank 2, and finally, the liquid level of the water settling tank ...

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Abstract

An oil-water replacement process for crude oil storing and discharging of a single-column platform comprises the following steps: 1, filling water into an oil storing chamber and a water sedimentation chamber; 2, performing oil and water replacement in the oil storing process; 3, performing oil and water replacement in the oil discharging process; 4, controlling the oil-water level in the oil storing chamber, namely, controlling the oil-water level in the oil storing chamber to be between the maximum chamber capacity location and the minimum chamber capacity location so as to ensure that environmental pollution accident and unqualified output crude oil can be avoided during the oil storing and outputting process of the single-column platform; 5, continuously performing oil-water replacement process during oil storing and water draining and oil discharging and water feeding in the oil storing chamber within the oilfield production period, so as to achieve the function of storing and discharging crude oil by a self floating structure of the single-column platform. With the adoption of the oil-water replacement process, the investment cost of the oilfield development engineering can be greatly decreased; in addition, the oil storing chamber is full in the whole operation all the time, so that the influence of free liquid level on the structure and the stability of the floating structure can be reduced, and the pollution to the ocean environment can be avoided.

Description

technical field [0001] The invention relates to an oil-water replacement process, in particular to an oil-water replacement process for storing and unloading crude oil on a single-column platform. It belongs to the field of offshore oil engineering. Background technique [0002] At present, in the development of deepwater offshore oilfields, the development mode of single column platform (SPAR) plus floating production storage and offloading (FPSO) is usually adopted. Among them, the single-column platform is used for drilling and production and some oil and gas processing, while the floating production storage and offloading tanker is used to receive the logistics of the single-column platform and process it, and the qualified crude oil is stored on the floating production storage and offloading tanker in the oil tank. The above-mentioned development mode needs two monomer structures, so the investment cost is relatively high. In order to overcome the above shortcomings,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D88/78
CPCB65D88/78
Inventor 周鹏王晋刘培林曾树兵陈欣余智陈文峰刘巍巍张虹宋文路
Owner CHINA NAT OFFSHORE OIL CORP
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