“热水洗+臭氧氧化”联合工艺处理大颗粒油基岩屑
Treatment of large particle oil-based cuttings by the combined process of hot water washing and ozone oxidation
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摘要: 针对油基岩屑处理过程中的大颗粒部分（0.5-1 cm），研究了以"热水洗+臭氧氧化"为核心的联合工艺的处理效果，并分别对热水洗、臭氧氧化环节的工艺参数进行了优化.结果表明，在最优条件下，经过处理后的油基岩屑的含油率可由15.8%降低到0.24%，达到了GB 4284-2018中规定的处置要求，处理过程中回收的油分可重新用于配制钻井液.通过对油基岩屑固相的表征发现，其具备臭氧催化氧化催化剂的明显特征，是一种天然的臭氧催化氧化催化剂，并从反应动力学角度对臭氧氧化环节的反应特性进行了定量分析.结果表明，其满足准一级反应动力学特征，反应活化能为14.421 kJ·mol-1.以"热水洗+臭氧氧化"为核心的联合工艺为大颗粒油基岩屑的无害化、资源化处理提供了一种参考.Abstract: One key problem during the treatment of oil-based cuttings, i.e., large particles (0.5-1 cm) treatment, needs to be solved. A combined process of "hot water washing +ozone oxidation" was used for the treatment of the large particle oil-based cuttings, and the parameters of the hot water washing and ozone oxidation process were optimized respectively. Under the optimal conditions, the oil content of the treated oil-based cuttings was reduced from 15.8% to 0.24%, which met the disposal requirements stipulated in GB 4284-2018, while the oil recovered in the process could be reused to prepare fresh drilling fluid. Through the characterization of the solid phase of the oil-based cuttings, it was found that the solid possessed the characteristics of ozone oxidation catalyst and was a natural ozone oxidation catalyst. The reaction kinetics of ozone oxidation was analyzed quantitatively, and the result showed that it satisfied the kinetic characteristics of the pseudo-first order reaction, while the reaction activation energy was 14.421 kJ·mol-1. The combined process with "hot water washing + ozone oxidation" provides a new technology for the harmless and resourceful treatment of large particle oil-based cuttings.
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