Method for treating and reusing fracturing backflow fluid of shale gas
A flowback fluid and air pressure technology, applied in mining wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Sulfur, saving equipment investment cost and improving the effect of recycling rate
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[0072] Example 1
[0073] This embodiment provides a shale gas fracturing flowback fluid treatment and reuse method when the total hardness value of the shale gas fracturing flowback fluid is qualified, see figure 2 , The process and reuse method includes the following steps:
[0074] Step 101: After the initial shale gas fracturing flowback fluid 1 discharged from the wellhead on the fifth day after fracturing construction of a shale gas well is separated from the gas and liquid, the floating pump impeller surface aerator (theoretical Power efficiency is 2.6~2.8kg O 2 / kW·h) Blow air 4 into it to make the Fe in the flowback fluid 1 of the initial shale pressure fracturing 2+ Converted to Fe(OH) 3 , Get the oxidized shale gas pressure fracturing flowback fluid 2.
[0075] Step 102: Use the hydraulic fracturing analysis component of the HACH portable water quality analysis laboratory to detect the water quality of the oxidized post-shale gas fracturing flowback fluid 2, and contact a...
Example Embodiment
[0084] Example 2
[0085] This embodiment provides a shale gas fracturing flowback fluid treatment and reuse method when the total hardness value of the shale gas fracturing flowback fluid is unqualified, see image 3 , The processing method includes the following steps:
[0086] Step 201, after the initial shale gas pressure fracturing flowback fluid 1 discharged from the wellhead during the production of a shale gas well is separated from the gas and liquid, the floating pump impeller surface aerator (theoretical power efficiency is 2.6~2.8kgO 2 / kW·h) Blow air into it to make the Fe in the initial shale fracturing flowback fluid 1 2+ Converted to Fe(OH) 3 , Get the oxidized shale gas pressure fracturing flowback fluid 2.
[0087] Step 202: Use the hydraulic fracturing analysis component of the HACH portable water quality analysis laboratory to detect the water quality of the oxidized shale gas fracturing flowback fluid 2, and mix it with the shale gas fracturing fluid of an oilfie...
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