Method for treating and recycling shale gas fracturing flow-back fluid
A technology of fracturing flowback fluid and flowback fluid, which is applied in degassed water/sewage treatment, mining wastewater treatment, water/sewage treatment, etc. It can solve the problems of low water quality standards, low secondary reuse rate, and foaming rate. Advanced problems, to achieve good anti-compound salt characteristics, good fluid loss control performance, and low cost effects
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Embodiment 1
[0035] A method for treating and recycling shale gas fracturing flowback fluid, comprising a step of treating shale gas fracturing flowback fluid and a step of preparing polymer glue,
[0036] Among them: the steps for processing the shale gas fracturing flowback fluid are:
[0037] a. Add an acid-base regulator to the fracturing flowback fluid to adjust the pH value to 7;
[0038] b. Add defoamer to the fracturing flowback fluid and then stir. If there are bubbles, continue to add defoamer. If there are no bubbles, add fungicide;
[0039] c. After adding the fungicide, take a sample for detection, if the bacterial content of sulfate-reducing bacteria SRB≤25 / mL, iron bacteria FB≤10 4Individual / mL, saprophytic bacteria TGB≤10 4 per mL, add metal ion complexing agent, if the bacteria content exceeds the standard, continue to add fungicide;
[0040] d. Stir after adding the metal ion complexing agent, stop stirring after the reaction is complete, take the supernatant for testi...
Embodiment 2
[0044] A method for treating and recycling shale gas fracturing flowback fluid, comprising a step of treating shale gas fracturing flowback fluid and a step of preparing polymer glue,
[0045] Among them: the steps for processing the shale gas fracturing flowback fluid are:
[0046] a. Add an acid-base regulator to the fracturing flowback fluid to adjust the pH value to 8;
[0047] b. Add defoamer to the fracturing flowback fluid and then stir. If there are bubbles, continue to add defoamer. If there are no bubbles, add fungicide;
[0048] c. After adding the fungicide, take a sample for detection, if the bacterial content of sulfate-reducing bacteria SRB≤25 / mL, iron bacteria FB≤10 4 Individual / mL, saprophytic bacteria TGB≤10 4 per mL, add metal ion complexing agent, if the bacteria content exceeds the standard, continue to add fungicide;
[0049] d. Stir after adding the metal ion complexing agent, stop stirring after the reaction is complete, take the supernatant for test...
Embodiment 3
[0053] A method for treating and recycling shale gas fracturing flowback fluid, comprising a step of treating shale gas fracturing flowback fluid and a step of preparing polymer glue,
[0054] Among them: the steps for processing the shale gas fracturing flowback fluid are:
[0055] a. Add an acid-base regulator to the fracturing flowback fluid to adjust the pH value to 8;
[0056] b. Add defoamer to the fracturing flowback fluid and then stir. If there are bubbles, continue to add defoamer. If there are no bubbles, add fungicide;
[0057] c. After adding the fungicide, take a sample for detection, if the bacterial content of sulfate-reducing bacteria SRB≤25 / mL, iron bacteria FB≤10 4 Individual / mL, saprophytic bacteria TGB≤10 4 per mL, add metal ion complexing agent, if the bacteria content exceeds the standard, continue to add fungicide;
[0058] d. Stir after adding the metal ion complexing agent, stop stirring after the reaction is complete, take the supernatant for test...
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