Resource utilization technology of drilling well wastes

Abstract

The invention discloses a resource utilization technology of drilling well wastes. The resource utilization technology comprises three phases: pretreatment, biochemical treatment and deep treatment. In the pretreatment phase, the solid-liquid separation of drilling well slurry and fracturing flow-back fluid is realized by the physical and chemical methods, the solid phase is introduced into a baking-free brick preparation section and a sludge processing section, the liquid phase and operation wastewater are introduced into a blending and storing tank and mixed, pollutants are removed from the mixed liquid through a physical method, and then the mixed liquid is subjected to an iron-carbon micro-electrolysis treatment. In the biochemical treatment section, a hydrolysis acidification-contact oxidation technology is adopted to reduce the COD of biochemical effluent to less than 100 mg / L. In the deep treatment section, an ozone catalytic oxidization method and a BAF bio-filter technology are used together to degrade organic substances in water body, then the water body is processed in a membrane processing module to obtain fresh water and thick water; the fresh water can be used for afforesting in factory, and the thick water can be processed by a MVR mechanical evaporation system to produce cooling water, which can be used for afforesting in factory.

Description

technical field [0001] The invention relates to the technical field of resource recovery, in particular to a resource utilization process of drilling waste. Background technique [0002] Although domestic onshore oil and gas regions have stepped up efforts to treat waste generated from drilling and completion operations in recent years, the treatment is still incomplete and the methods are crude. At present, there are large differences in the treatment schemes of waste liquid at home and abroad, whether it is technical schemes, equipment matching, or environmental protection investment. [0003] (1) curing [0004] For a long time, most oilfield waste fluids in China have been treated by directly solidifying the waste fluid in the waste storage pool after the completion of drilling and completion. The specific method is to wait for the waste in the sewage pool to settle naturally under the action of gravity to form clear night and sludge, drain the upper part of less than ...

AI Technical Summary

Problems solved by technology

[0018] At present, domestic drilling waste treatment technology is relatively mature, but compared with foreign advanced waste treatment integrated device technology, the automation level and work efficiency of domestic equipment still need to be further improved

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