Method for comprehensive treatment of oilfield waste

Abstract

The invention discloses a method for comprehensive treatment of oilfield waste, which is characterized by comprising the process steps of cleaning and separation, ultrasonic separation, tempering and destabilization, oil-water separation, centrifugal separation, mixed curing, air floatation separation, adsorption filtration, flocculating settling, oxidization electrolysis, deep purification and permeable filtration. Thus, the oilfield waste is treated and utilized in a classified manner, so that sump oil is recovered, the solid phase achieves the discharge standard of oilfield sludge treatment design specifications (SY / T6851-2012) or is reutilized for construction material manufacturing, and the liquid phase achieves the sewage comprehensive discharge standard (GB8978-1996) after being subjected to water treatment.

Description

technical field

[0001] The invention relates to the treatment and utilization technology of oilfield waste, in particular to a process technology for comprehensive treatment of drilling waste. Background technique

[0002] During the process of oilfield exploration, development, and drilling, a large amount of mixture formed by drilling cuttings, mud, sewage, and dirty oil-drilling waste and oily waste is produced. The traditional disposal method is to discharge it into the mud sewage pool at the well site. The in-situ treatment method is solidification treatment to reduce its pollution hazard; there are long-term pollution hidden dangers due to the leakage and overflow of the mud sewage storage tank; the sludge produced by the waste drilling fluid treatment has been listed as hazardous waste at present, and the waste category is HW08 , waste code 071-002-08. In the face of stricter environmental protection standards, comprehensive treatment of oilfield waste is imperative;...

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