Movable high-efficiency oily sewage treatment process

Abstract

The invention relates to a movable high-efficiency oily sewage treatment process. The process mainly solves the problem that station-building centralized treatment for small-block oil fields and scattered oil fields is high in project investment and processing cost. The process includes the following steps that 1),oily sewage produced after oil-water separation of an oilfield production fluid enters a hydrocyclone for oil-water separation, the treated effluent enters a first buffer water tank, water in the first buffer water tank is elevated, passes through a flowmeter and then enters a microbubble cyclone air flotation machine, and the effluent from the microbubble cyclone air flotation machine enters a second buffer water tank; 2), the water in the second buffer water tank in the first step is elevated, passes through a flowmeter and then enters a double-layer media filter for filtering, the filtered effluent enters a membrane filter, and the effluent filtered through the membrane filter enters a third buffer water tank, passes through a fourth elevating pump and then a flowmeter and finally is elevated, discharged and re-injected. The process reduces the costs of the project investment and the production process, and guarantees efficient, economical and effective development of oilfields.

Description

technical field [0001] The invention relates to the technical field of oilfield produced water treatment, in particular to a movable and high-efficiency oily sewage treatment process. Background technique [0002] At present, the treatment of oily sewage produced by oilfields at home and abroad has developed to the joint application of coalescence, sedimentation, cyclone and air flotation to improve the efficiency and effect of oil-water separation in the oil removal part, which will be the development trend of oily sewage treatment technology. [0003] Most of the oilfields in China adopt the method of centralized construction of treatment stations, while more treatment methods in foreign countries are to integrate the above-mentioned treatment technologies to process a set of mobile treatment devices to meet the needs of decentralized development of foreign oilfields, especially desert oilfields. Most of the oily sewage treatment processes in domestic oilfield centralized ...

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Problems solved by technology

[0004] The present invention aims to overcome the relatively high investment and production and treatment costs of the existing small-block oilfields and scattered oilfields in the background technology for centralized station construction and treatment projects, and provides a movable and efficient oily sewage treatment process. Subsequent production, as well as the characteristics of decentralized development suitable for overseas and peripheral oilfields, ensure that the produced water is treated up to the standard and reinjected into the ground, reducing engineering investment and production treatment costs, and ensuring efficient and economical effective development of oilfields

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