A kind of drilling waste water utilization method
A technology of drilling wastewater and magnetic flocculants, which is applied in chemical instruments and methods, multi-stage water treatment, drilling compositions, etc., can solve resource utilization limitations, high solid-liquid separation load, large amount of wastewater flocs, etc. problems, to achieve the effect of good resource utilization, low solid phase moisture content, and fast separation speed
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Embodiment 1
[0028] Take 2000mL of drilling wastewater, add surface organic polymer modified permanent magnet powder as magnetic flocculant 6g / L slick water flowback liquid, stir and flocculate for 5 minutes, use disk for solid-liquid separation, and the separated solid phase is oscillated to recover magnetic flocculation agent, and the separated water phase is treated with strong acid ion exchange resin to obtain treated drilling wastewater.
[0029] Get clear water, according to API standard, prepare fracturing fluid, hydroxypropyl guar gum, boron cross-linking agent, drainage aid, gel breaker, antiswelling agent, do the drilling wastewater formula after the treatment of the present invention see Table 2, surplus In order to obtain the water sample of the treated drilling wastewater, the treated drilling wastewater was controlled at a temperature of 60°C, and after a constant temperature of 120min, a six-speed rotational viscometer was used to measure the temperature for 170s. -1 The vis...
Embodiment 2
[0034] Control group: conventionally treated drilling wastewater to prepare guar gum fracturing fluid: take 2000mL of drilling wastewater, add gel-breaking coagulant PAC6000mg / L, stir and flocculate for 15min, use sodium hydroxide to adjust the pH to 9-10, add PAM30mg / L L, slowly stirred for 2-3 minutes, and centrifuged, the separated water phase was conventionally treated drilling wastewater. Drilling waste water after the conventional treatment according to 0.4wt% hydroxypropyl guar gum, 0.05wt% boron cross-linking agent, 0.3wt% drainage aid, 0.05wt% gel breaker, 1.2wt% antiswelling agent, the remainder Prepare guar gum fracturing fluid.
[0035] Put the guar gum fracturing fluid prepared according to formula 2 and the guar gum fracturing fluid prepared in the control group into a temperature-controlled heater, keep the temperature for 120 minutes according to the temperature requirements in Table 2, and use a six-speed rotational viscometer for 170 seconds -1 Measure the v...
Embodiment 3
[0040] Conventional method to treat drilling wastewater: Take 2000mL of drilling wastewater, add gel-breaking coagulant PAC6000mg / L, stir for flocculation and sedimentation for 15min, use sodium hydroxide to adjust the pH to 9-10, add PAM30mg / L, slowly stir for 2-3min, and centrifuge Separation, the separated water phase is drilling wastewater after conventional treatment.
[0041] The present invention treats drilling wastewater: Take 2000mL of drilling wastewater, add permanent magnet powder modified by surface organic polymer as magnetic flocculant 6g / L slick water flowback liquid, stir and flocculate for 10min, and use disk for solid-liquid separation. The magnetic flocculant is recovered by solid phase oscillation, and the separated water phase is treated with a weakly basic ion exchange resin to obtain treated drilling wastewater.
[0042] According to the API standard, the fracturing fluid is prepared, and the formula includes: 0.4wt% hydroxypropyl guar gum, 0.05wt% bor...
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