Process for treating oil field produced water

A technology for treatment process and produced water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, mechanical oscillation water/sewage treatment, etc. And equipment corrosion and other problems, to achieve the effect of superior corrosion resistance, reduced processing costs, and low power costs

Active Publication Date: 2011-08-17
XIAN CHANGQING TECH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most domestic oilfield produced water treatment processes are "two-stage oil removal + two-stage filtration" or "one-stage oil removal + two-stage filtration" process. After years of operation, the following problems still commonly exist: (1) The first oil removal is not complete; (2) The filtration system has a heavy load, frequent backwashing, and low treatment accuracy; (3) For low-permeability oil fields and ultra-low-permeability oil fields, there are serious corrosion problems in pipelines and equipment; (4) The oxygen content exceeds the standard; (5) SRB Excessive content

Method used

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  • Process for treating oil field produced water
  • Process for treating oil field produced water
  • Process for treating oil field produced water

Examples

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Embodiment 1

[0031] Such as figure 1 As shown, an oilfield produced water treatment process involves regulating water tanks, air flotation devices, pipeline mixers, nitrogen dynamic reactors, sedimentation tanks and ultrasonic filters. The oilfield produced water treatment process has the following steps:

[0032] In step 1, add coagulant and produced water from the oilfield into the regulating water tank for preliminary adjustment and mixing. The coagulant is commonly used in produced water treatment and can be selected according to needs, and no special requirements are made here.

[0033] In step 2, the regulated oilfield produced water, flotation agent, flocculation and coagulation aid in step 1 are introduced into the air flotation device. The ones commonly used in water treatment can be selected according to needs, and there are no special requirements here. The produced water in the oilfield passes through the high-efficiency dissolved air flotation deoiling process, and the primary...

Embodiment 2

[0043] Such as figure 1 As shown, the process of this embodiment is the same as that of Embodiment 1, except that a new type of nitrogen power reactor is used.

[0044] Such as figure 2 As shown, the nitrogen dynamic reactor at least includes a reactor cavity 9, a nitrogen pipeline 8 and a partition 5; the structure of the reactor cavity 9 is a cuboid, and the middle of the reactor cavity 9 is fixedly connected with a partition 5, a partition 5 The reactor cavity 9 is divided into a front cavity 6 and a rear cavity 7 by adopting a "semi-closed type". Nitrogen gas inlet 3 is arranged on the left side of the front end of the front cavity 6, and the nitrogen gas release port 4 is arranged on the right side of the upper end surface of the front cavity 6, and the nitrogen gas inlet 3 and the nitrogen gas release port 4 are connected through the nitrogen pipeline 8; the nitrogen pipeline 8 is composed of four horizontal pipelines and one vertical pipeline, and adopts a "Feng"-sha...

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Abstract

The invention belongs to a process for treating oil field produced water and belongs to the field of oil field produced water treatment, in particular relates to the process for treating the oil field produced water. In the process, at least a regulating water tank, an air flotation device, a pipeline mixer, a nitrogen power reactor, a sedimentation tank and an ultrasonic filter are adopted and the oil field produced water is treated by adopting a mode of combining air flotation oil and suspended matter removal, nitrogen preparation and ultrasonic filtration. The process for treating the oil field produced water has good treatment effect, high oil removing efficiency, corrosion resistance and low cost and has good effect in the actual application.

Description

technical field [0001] The invention relates to the field of oilfield produced water treatment, in particular to an oilfield produced water treatment process. Background technique [0002] The Ordos Basin is a low-permeability and ultra-low-permeability oilfield. The physical properties of oil reservoirs are poor, and the produced water is characterized by high salinity, high salt content, high chloride ion content, and high iron content. The produced water in oilfields is a highly corrosive and high-scaling water body, and the water quality is complex. In order to maintain reservoir energy and oil recovery rate, water injection development is still the main technical measure. Water injection quality plays an important role in oilfield development, and the extremely low permeability makes the produced water treatment system have more stringent requirements for the effluent water quality. [0003] Most domestic oilfield produced water treatment processes are "two-stage oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/36
Inventor 王国柱郭增民郭志强熊超张帆
Owner XIAN CHANGQING TECH ENG
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