Intelligent vehicle-mounted in-situ treatment and reinjection control system for oil field produced liquids

Abstract

The invention relates to an intelligent vehicle-mounted in-situ treatment and reinjection control system for oil field produced liquids. The system comprises an intelligent control unit as well as anair flotation oil separation device, an oil filter-out device, an ion regulation device, a corrosion and scale inhibition regulation device, a sterilization device and a clear water injection tank which are sequentially connected, wherein the air flotation oil separation device, the oil filter-out device, the ion regulation device and the corrosion and scale inhibition regulation device are connected with the intelligent control unit. The control system is integrated into a standard container except the clear water injection tank. By means of the system, treatment and reinjection of oil fieldproduced liquids are realized, emission of the oil field produced liquids is reduced to a certain extent, environmental harm is reduced, fresh water consumption is reduced, and the water resource is saved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an intelligent vehicle-mounted oilfield production fluid in-situ treatment reinjection control system, which can be used to treat production fluid containing oil and a large amount of suspended matter. The reinjection control system of the present invention has the advantages of small floor space, flexibility and high degree of automation, and can effectively remove mineral oil, suspended solids, microorganisms, etc. in the production fluid, and process the production fluid to meet the reinjection water standard, ensuring the quality of the reinjection water , suitable for in-situ water injection projects in block oilfields. Background technique [0002] Most oilfields in my country have entered the middle and late stages of oil exploitation, and the water content in the produced fluid is 70-80%, and some oilfields even reach as high as 90%. The amount of wast...

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Problems solved by technology

[0004] (2) Complex composition: Oilfield produced water contains a variety of organic components of crude oil and various chemical agents, various oilfield chemical agents, such as corrosion and scale inhibitors, demulsifiers, surfactants, high molecular polymers such as PAM, etc. etc., its chemical oxygen demand is high (500-1000mg / L)

For oily wastewater from medium and low permeability oil layers, it is generally a "three-stage" treatment plus "fine filtration" process, and the following representative treatment processes are: coagulation degreasing-fine filtration, hydrocyclone-fine filtration , air flotation flotation-fine filtration, "secondary sedimentation" + "secondary filtration" treatment processes, etc., the above processes have problems such as high gathering and transportation costs, low automation, and poor mobility. Promotion and improvement of reinjection standards for low-permeability reservoirs. It is difficult for existing treatment technologies and equipment to meet the requirements. Therefore, it is necessary to study new treatment technologies and develop more effective treatment equipment.

[0011] Based on the above analysis, it can be concluded that oilfield produced fluid is the first choice for oilfield reinjection water, but it has the characteristics of complex water quality and dispersion, so it should be treated to meet the reinjection requirements

At the same time, combined with the current situation, if the reinjection is handled at the gathering and transportation transfer station, there will be problems such as running, dripping and leaking, and scattered oil wells cannot be effectively dealt with.

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