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Recovery and treatment technology of dirty oil produced in sewage setting tank in produced liquid treatment

A treatment process and sewage recovery technology, applied in the direction of electric/magnetic dehydration/demulsification, chemical dehydration/demulsification, etc., can solve the problems that affect the normal production and operation of the crude oil dehydration system, and the electric field of the electric dehydrator collapses, etc., to achieve Simple implementation, convenient operation, good processing effect

Active Publication Date: 2010-06-16
DAQING OILFIELD CO LTD +2
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AI Technical Summary

Problems solved by technology

More importantly, since the waste oil in the recovery accident tank contains solid particle sulfide, when it is recovered to the crude oil dehydration system for treatment, a middle black transition layer will be formed in the electric dehydrator, causing the electric dehydrator to collapse the electric field and affecting the crude oil. The normal production and operation of the dehydration system has become an urgent problem to be solved in oilfield production

Method used

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  • Recovery and treatment technology of dirty oil produced in sewage setting tank in produced liquid treatment
  • Recovery and treatment technology of dirty oil produced in sewage setting tank in produced liquid treatment

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Embodiment Construction

[0011] combine figure 1 Shown, the waste oil recovery treatment process step of the present invention is as follows:

[0012] The production fluid produced by the oil well is treated by the oil-water separator 17 of the oilfield joint station, and the separated sewage after treatment enters the sewage settling tank 1, and the sewage oil produced in the sewage settling tank 1 is lifted by the sewage oil lifting pump 2 through The flow meter 3 enters the static reaction mixer 4, and at the same time, one or two of the dirty oil demulsifiers SO1001, SO1002 or SO1003 are added using the dosing device 15 in the production station, and the dosing amount is usually 30-50 mg / L, alternately add more than two kinds of dirty oil demulsifiers that can destroy ferrous sulfide particles to form a rigid interfacial film on the oil-water interface; after adding the demulsifier, the dirty oil is mixed in the static reaction mixer 4 and then enters the dirty oil heater 5 , heated up to 40-50°...

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Abstract

The invention discloses a recovery and treatment technology of dirty oil produced in a sewage setting tank in produced liquid treatment. The technology adopts built facilities of the traditionally produced liquid treatment technology and uses other additional process equipment, such as a static reaction mixer, a three-phase high-speed centrifugal separator and the like, so that sulfide particle impurity which affects the normal running of an electrical dehydrator is separated out of dirty oil, the dirty oil in the electrical dehydrator can be recovered for sure, the collapse of the electric field of the electrical dehydrator can not occur during the dehydration process, and the normal production running can not be affected; and the recovery and treatment technology of dirty oil has the advantages of simple implementation, convenient operation, good processing effect and economic project investment, is a treatment technology which is advanced in the oil fields at home at present and can be implemented, and achieves the purpose for solving practical production problems, therefore, the recovery and treatment technology of dirty oil is suitable for wide matching application in the renovation project of oil fields.

Description

Technical field: [0001] The invention relates to a process for treating the produced fluid of an oil field combined station, in particular to a process for recovering and treating waste oil produced in a sewage settling tank. Background technique: [0002] In the late stage of oilfield development, oil wells produce crude oil production fluid. After being treated by the oil-water separator and electric dehydrator in the oilfield joint station, the separated sewage enters the sewage settling tank in the production fluid treatment process as subsequent sewage treatment The sewage water source treated by the station. Since there is still a certain amount of dirty oil in the sewage after oil-water separation, it settles in the sewage settling tank for a long time to form an oil slick and is separated out. This part of dirty oil continues to accumulate and needs to be recovered regularly or reprocessed. At present, there are two ways to recover and treat this part of the waste o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C10G33/02
Inventor 夏福军吴迪孟祥春隋向楠李建亮
Owner DAQING OILFIELD CO LTD
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