Abstract
Being widely used in the exploration and development of shale gas, oil-based drilling fluids, however, produced a large amount of oily waste during the drilling process should be properly handled, or it might lead to serious secondary pollution. In this study, a biodegradable environmentally friendly degreasing agent CYJ-1 with good degreasing performance in greasy solid waste was synthesized, which possesses a degreasing rate at 93%. For the first time, the transition state theory, interfacial tension, and potential energy are used to analyze the degreasing mechanism of the degreasing agent. Also, around the wastewater and waste residues generated after the degreasing of oily drilling cuttings, wastewater “flocculation oxidation” treatment process and waste residue “solidification” treatment process have been developed. Field application of the harmless treatment technology of oily drilling cuttings was carried out in Xinjiang Yihe 2AH well and Santa 2–10 well. The application results show that the utilization of this technology is able to effectively solve the environmental pollution and resource recovery problems of oily drilling cuttings.
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