On-site water diversion, treatment and reinjection device and method

Abstract

The invention discloses an on-site water diversion, treatment and reinjection device and method. The device comprises a three-phase separator, an oil-mud-water separator, a coarse treater, a fine treater, a water injection tank, an air compressor, an air storage tank, a buried blow-down tank, and matched pumps and pipe valves. The treatment process is high in adaptability to incoming water, the quality of treated water is good, the injected water quality can reach the standard, the process is short in treatment flow, and large equipment such as an intermediate oil removal tank, a settling tank and a buffer tank are omitted; the treatment process is closed, and gas volatilization is avoided; and the energy consumption is low, the noise is low, the residual pressure of the three-phase separator is effectively utilized, the configuration of a primary lifting pump is omitted, and the energy is saved. The treatment device organically integrates mechanical, electrical and automatic control technologies and the like, has the characteristics of miniaturization, intelligence, high efficiency and the like, and preliminarily meets the requirement of unattended operation. The whole device achieves the purposes of on-site water diversion, on-site treatment and on-site reinjection, meets the development trend of short-process package, and solves the problems of water diversion, water purification and water injection of high-water-content oil fields.

Description

technical field [0001] The invention relates to the technical field of oilfield water treatment, in particular to an in-situ water separation, treatment and reinjection device and method. Background technique [0002] As the oil field enters a period of high water content, a large amount of sewage needs to be treated and reinjected, which brings a series of problems to the existing ground gathering and treatment system: First, the original sewage treatment system is overloaded, which affects the treatment efficiency and effect. The water quality of sewage is not up to standard; the second is that the transportation capacity of the original gathering and transportation pipeline network is limited, and the way of relying on cars to transport sewage back and forth increases energy consumption and cost; the third is the construction required for the expansion and transformation of the original sewage treatment facilities The cost is high, the floor area is large, and the existin...

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Problems solved by technology

[0002] As the oil field enters a period of high water content, a large amount of sewage needs to be treated and reinjected, which brings a series of problems to the existing ground gathering and treatment system: First, the original sewage treatment system is overloaded, which affects the treatment efficiency and effect. The water quality of sewage is not up to standard; the second is that the transportation capacity of the original gathering and transportation pipeline network is limited, and the way of relying on cars to transport sewage back and forth increases energy consumption and cost; the third is the construction required for the expansion and transformation of the original sewage treatment facilities The cost is high, the floor area is large, and the existing space of many stations does not meet the needs of the original process; the original treatment process can no longer meet the trend of oilfield development

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