Device and technology capable of combining high-salt content oil field sewage treatment and viscous oil recovery

Abstract

The invention provides a device and a technology capable of combining high-salt content oil field sewage treatment and viscous oil recovery, and belongs to the technical field of sewage treatment. The device and the technology can be utilized for sewage treatment of a petroleum exploitation industry, a petroleum refining industry and chemical production processes, especially, realize high-efficiency treatment of high-salt content oil field sewage, and effectively combine high-salt content oil field sewage treatment and viscous oil recovery. The device is characterized mainly in that the device comprises a burning evaporator used in high pressure water, a multi-stage flash evaporation pot, a spray evaporator and a steam injection boiler. Through the device and the technology, advanced treatment of high-salt content oil field sewage is realized; fresh water and salt slurry can all be obtained; zero discharge is realized really; and waste water production is avoided. In addition, high-temperature high-pressure secondary steam and gas can be combined with boiler steam so that viscous oil can be recovered according to an optimal ratio and full utilization of energy is realized. The device has a compact structure, high efficiency and good economy. The technology is stable, reliable and novel oil field sewage treatment technology.

Description

technical field [0001] The invention relates to a device and a process for combining high-salt oilfield sewage treatment and heavy oil exploitation, and belongs to the technical field of sewage treatment that is energy-saving, emission-reducing, and beneficial to environmental protection. The treatment system efficiently combines oilfield sewage treatment with heavy oil recovery, so as to realize advanced treatment and resource reuse of oilfield produced water. Background technique [0002] Oilfield sewage is the main by-product in the process of oil exploitation. As my country's oil exploitation enters the middle and late stages, the amount of water and steam injected to meet the pressure of formation exploitation is increasing, and the associated oilfield sewage is also increasing, and the treatment pressure is very high. Big. In addition, the composition of oilfield sewage is very complex, containing a large amount of solid dissolved matter, suspended matter, colloid, sed...

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Problems solved by technology

When these processes are used to treat high-organic and high-salt sewage, there are a series of problems such as incomplete treatment of dissolved substances, serious membrane fouling, and rapid equipment corrosion, which makes the treatment process very limited by water quality. Therefore, new efficient treatment of high-salt oilfield sewage is explored. technology is necessary and urgent

[0003] In addition, with the excessive exploitation and consumption of conventional oil resources, my country has begun to vigorously exploit heavy oil resources. In view of the high viscosity of heavy oil, my country currently mainly uses steam injection for production, and the large steam consumption has also brought difficulties to oil field production.

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