Recovery treatment device for aging oil of oil fields

Abstract

The invention discloses a recovery treatment device for aging oil of oil fields, which is mainly used for the centralized treatment for difficultly treated aging oil of oil and gas fields, and the recovery of crude oil resources. According to the sequence of process flow, the recovery treatment device for the aging oil mainly comprises a material hoisting system, a filtration system, a material-adding system, a heating / heat exchange system, a solid-liquid separation centrifuge, a slag collection box, an oil-water buffer tank and an oil-water separator. Heating / heat exchange and solid-liquid separation treatment processes can be selected according to the specific situation of aging oil to be treated; due to a skid-mounted design, the device is high in motility; the process can effectively treat the aging oil of oil field stations, recover effluent oil, and meter treated oil and water to count recovery efficiency; the recovered sewage can enter a sewage treatment system; and the water content ratio of recovered oil can reach the standard of detergent oil.

Description

technical field [0001] The invention relates to an aging oil recovery and treatment device in the oil field exploitation industry, which is suitable for the treatment of various aging oils in land and offshore oil and gas fields. Background technique [0002] With the development of oilfields in the middle and later stages, a large number of difficult-to-handle aging oils have appeared in major continental oilfields and offshore oil production platforms, resulting in a waste of equipment processing capacity and bringing hidden dangers to the system. There are three main sources of aging oil, waste oil recovered from sewage sedimentation, flotation and other treatment systems, oil-water transition layer in dehydrator, highly emulsified crude oil emulsion and ground oil during drilling, operation and transportation, sewage / The dirty oil in the dirty oil recovery pool. According to the analysis of the above sources, the composition of aging oil emulsion is extremely complex, ...

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Problems solved by technology

[0006] The above-mentioned problems have different degrees in different aging oils, and the content of components is also different. The existence of these components will cause the water content of the purified oil to exceed the standard, and the oil content of the extracted sewage will exceed the standard. It brings great hidden dangers to the crude oil dehydration treatment equipment, which is likely to cause accidents such as electric tripping and crossing the electric field, shortening the service life of the equipment; a large number of aging oil transition layers exist in the system, wasting the effective space of the processing equipment, and seriously affecting the oil field normal production

[0007] At present, in terms of aging oil treatment in the industry, there is no special process equipment to solve the problem. More solutions are to adopt the method of back-mixing treatment, but this method cannot fundamentally solve the problem, and has not been widely recognized. Back-mixing Aging oil is highly polluting, which will increase the degree of emulsification of crude oil in the system and cause a new problem of electrolysis. According to research results, the amount of back-mixed aging oil should not exceed 10%, preferably controlled at 5%, and the treatment efficiency of this process Very low, more of the circulation of aged oil in the system

Patents CN200410013673.7, CN200620091934.1, and CN200320126151.9 all disclose new technologies for aging oil treatment, but they all rely on the subsequent electric dehydration process, which belongs to the pretreatment process or equipment for aging oil, and is only proposed for aging oil with certain types of characteristics. The solution is not suitable for aging oils of other component types, such as highly conductive and highly emulsifying aging oils

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