Method for removing boron ions in fracturing flow-back fluid

A fracturing flowback fluid, boron ion technology, applied in chemical instruments and methods, neutralized water/sewage treatment, water/sludge/sewage treatment, etc. Achieve the effect of good stability, easy operation and high removal rate
CN112794501AActive Publication Date: 2021-05-14NORTHWEST UNIV(CN)
9 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST UNIV(CN)
Publication Date
2021-05-14

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of oil and gas field wastewater treatment, and particularly relates to a method for removing boron ions in fracturing flow-back fluid. The method adopts a chemical agent-coupling ion exchange technology, and comprises the following steps: firstly, adding an oxidizing agent into the flow-back liquid, then adding a metal ion precipitator, adjusting the pH value of the flow-back liquid to be alkaline, and reacting for a period of time; adding an inorganic flocculant, then adding a compounded boron removal agent, reacting for a period of time, finally adjusting the pH value to be slightly acidic, and finally settling boron ions, the boron removal agent and colloidal particles under the net capturing effect; and then combining an ion exchange treatment technology so that the final boron removal rate can reach about 88%, the content of suspended matters after treatment is reduced to below 20mg / L, the content of calcium and magnesium ions is reduced to below 300mg / L, and the treated flowback fluid meets the requirements of secondary fluid preparation.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of oil and gas field wastewater treatment, and in particular relates to a method for removing boron ions in fracturing flowback fluid. Background technique

[0002] Fracturing technology is an important technology for oil and gas fields to increase production. The fracturing fluid is the transmission medium in the fracturing process. It can not only transmit the power required in the fracturing process, but also play the role of creating fractures and carrying sand. Therefore, the quality of the fracturing fluid plays a decisive role in fracturing. effect. Usually, after the fracturing process is completed, 30% to 50% of the fracturing fluid will flow back to the ground to form fracturing flowback fluid.

[0003] The composition of the fracturing flowback fluid is very complex, including thickeners, crosslinking agents, drainage aids, clay stabilizers, bactericides, pH regulators and other regulators added...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More