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A high-efficiency method for rapid reduction of polymer viscosity in oilfield polymer-containing sewage and ASP flooding water

A ternary composite and polymer technology, which is applied in the direction of water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of difficult treatment process, high reinjection pressure, high energy consumption, etc., and achieve low operating cost, Viscosity reduction speed is fast, the effect of viscosity reduction speed is fast

Active Publication Date: 2018-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems in the prior art that the polymer-containing sewage and the produced water of ASP flooding have high viscosity, which leads to high reinjection pressure, high energy consumption, a large amount of chemicals need to be added, and the treatment process is difficult. An efficient oilfield polymer-containing sewage and a rapid viscosity reduction method for polymers in ASP flooding water

Method used

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  • A high-efficiency method for rapid reduction of polymer viscosity in oilfield polymer-containing sewage and ASP flooding water
  • A high-efficiency method for rapid reduction of polymer viscosity in oilfield polymer-containing sewage and ASP flooding water
  • A high-efficiency method for rapid reduction of polymer viscosity in oilfield polymer-containing sewage and ASP flooding water

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specific Embodiment approach 1

[0022] Specific implementation mode 1: An efficient oilfield polymer-containing sewage and a method for quickly reducing the viscosity of polymers in ternary compound flooding water according to this embodiment is specifically prepared according to the following steps:

[0023] Step 1. Utilize the ozone ultraviolet combination process to treat the poly-containing sewage. The poly-contained sewage is passed into the reactor with the ultraviolet lamp embedded in it at a flow rate of 1-5m / s, and the concentration of 33.3mg / s is passed into the reactor. After 20min to 30min of L-40mg / L ozone, the viscosity of the polymer-containing sewage is less than 0.2E.Pa.s, and the operation is stopped to meet the requirements for rapid viscosity reduction of the polymer-containing sewage; among them, the ultraviolet lamp tube of the reactor (China Haining Yi Kangda Lighting Company) has an emission wavelength of 254nm and a power of 40w. Polymer-containing sewage is oilfield polymer-containin...

specific Embodiment approach 2

[0032] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the poly-containing sewage is passed into the reactor embedded with ultraviolet lamps at a flow rate of 2-4 m / s. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0033] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, ozone with a concentration of 35 mg / L-38 mg / L is injected for 20 min-25 min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for efficiently and rapidly reducing viscosity of polymers in oil field polymer-bearing wastewater and ternary composite flooding water, relates to a method for rapidly reducing viscosity of polymers in water, and aims to solve the problems of high energy consumption, need of a large amount of agent and difficulty in treatment caused by high rejection pressure since the polymer-bearing wastewater and the ternary composite flooding water have high viscosity in the prior art. The method comprises the following steps: I, introducing the polymer-bearing wastewater into a reactor embedded with an ultraviolet lamp tube, and introducing ozone; II, adding an H2O2 solution into the polymer-bearing wastewater for reacting with stirring to obtain polymer-bearing wastewater of which the viscosity is less than 0.2E.Pa.s; III, adding sodium chloride powder into the polymer-bearing wastewater to obtain a polymer-bearing wastewater solution of which the viscosity is less than 0.2E.Pa.s. The method is applied to the field of rapid viscosity reduction of polymers in wastewater.

Description

technical field [0001] The invention relates to a method for rapidly reducing the viscosity of polymers in water, in particular to an efficient method for rapidly reducing the viscosity of polymers in oilfield sewage and triple compound flooding. Background technique [0002] As a precious non-renewable resource, petroleum occupies an irreplaceable position in industrial production worldwide. However, among all kinds of mineral resources, oil extraction has the characteristics of difficulty in exploitation and low recovery rate. Therefore, in the process of oil extraction in various countries, how to increase the recovery rate is a common concern of people. [0003] With the extension of production life, most oilfields in my country have entered the stage of high water cut production, and have gradually transitioned from the stage of primary oil recovery and secondary oil recovery to the stage of tertiary oil recovery. Among the tertiary oil recovery technologies, polymer f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F101/30
CPCC02F1/32C02F1/722C02F1/78C02F9/00C02F2101/30C02F2209/09
Inventor 魏利魏东魏超李春颖
Owner HARBIN INST OF TECH
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