A method for removing boron ions in fracturing flowback fluid

A fracturing flowback fluid, boron ion technology, applied in chemical instruments and methods, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. Good stability, easy operation, high transparency effect
CN112794501BActive Publication Date: 2022-05-03NORTHWEST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST UNIV
Publication Date
2022-05-03

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Abstract

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. Using chemical agent-coupled ion exchange technology, that is, first add oxidant to the flowback liquid, then add metal ion precipitant, adjust the pH of the flowback liquid to alkaline, and react for a period of time; add inorganic flocculant, and then add compound A good boron removal agent reacts for a period of time, and finally adjusts the pH to be acidic, and finally boron ions, boron removal agent and colloidal particles settle down together through net capture; then combined with ion exchange treatment technology, the final boron removal rate can reach 88% %, and the suspended solids after treatment are reduced to below 20mg / L, the content of calcium and magnesium ions is reduced to below 300mg / L, and the treated flowback liquid meets the requirements for secondary dosing.
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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

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