Technological process for floating oil delivering and settling dehydration of crude oil

Abstract

The invention discloses a technological process for floating oil delivering and settling dehydration of crude oil. The technological process comprises the following processes that: the crude oil containing water is conveyed in a joint station; medicine is added to the crude oil containing the water; then the crude oil containing the water is conveyed in a settling tank to carry out a oil-water separation to form a oil layer, a oil-water mixed layer and a sewage layer; a floating oil delivering apparatus is arranged in the settling tank, and the crude oil in the oil layer formed through the settling separation of oil and water is continuously and directly discharged from an oil inlet of the floating oil delivering apparatus and an oil line to complete the settling dehydration to be transformed into finished crude oil. According to the technological process provided by the present invention, a primary settlement or a secondary settlement formed through a series connection of two primarysettlements is adopted; the floating oil delivering apparatus is adopted for replacement of a fixed-type over flow device; the oil can be directly pumped through a oil pump, such that a surge tank iscanceled in the process; amount of the oil tank used in the single settlement is reduced by 50% compared to the amount of the oil tank used in a traditional process. Due to reducing the amount of theoil tank using in the process, the process is shortened. With the present invention, an operation is simple, management is easy, energy consumption in the production process is reduced, operation andrunning cost, management costs, capital expenditure and land expropriation cost are substantially decreased.

Description

【Technical field】 [0001] The invention relates to a crude oil subsidence dehydration process used in an oil field combined station, in particular to a crude oil floating oil subsidence dehydration process flow. 【Background technique】 [0002] In the process of oil extraction in an oil field, a large amount of groundwater is usually extracted along with the crude oil. Especially with the reduction of underground crude oil reserves, the water content in the produced crude oil is also increasing, so the crude oil produced underground must be dehydrated. After dehydration treatment, the moisture content of crude oil reaches the standard requirement, and then it becomes finished crude oil, which is transported or sold to various places for downstream processing. [0003] The oil-water separation process of crude oil in the combined station includes sedimentation dehydration, electric dehydration, chemical dehydration, electrochemical combined dehydration and ultrasonic dehydrati...

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the above-mentioned traditional crude oil settlement process is that the process is long and must go through at least two settlement processes, and the lower stage of each settlement must be equipped with a buffer tank

The number of oil tanks occupied is large, the floor area is large, the initial investment is large, the settling period is long, the separation efficiency is low, and the effect is poor

Moreover, due to the long process, the production process consumes a lot of energy, costs are high, production management is complicated, and operation is difficult.

In addition, when using the overflow tank to discharge oil, the liquid level must be raised to the maximum height of the overflow tank. It cannot adjust the oil discharge position according to the change of production conditions, so the settlement time cannot be adjusted according to the process requirements, which makes the dehydration process unnecessary. Intermediate stay time and intermediate fees

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