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Objective The aim is to comprehensively understand the research status and application trends of oily drilling sludge at home and abroad. Methods Based on China National Knowledge Infrastructure (CNKI) and Web of Science (WOS) databases, this paper searched literature relating to oily drilling sludge research from 2007 to 2021, and adopted bibliometric method in analysis from multiple perspectives. Results The number of papers published in Chinese and English was rising from 2007 to 2021 while the former was higher than the latter. The funded projects with the largest number of publications globally were the National Natural Science Foundation of China. The influential institutions at home and abroad were China University of Petroleum (East China) and King Fahd University of Petroleum and Mineral Resources in Saudi Arabia. Researchers from China were highly active in this field, while the United States still takes the international leading position. Domestic research focused on drilling technology and petroleum sludge treatment, while studies aboard paid more attention to drilling materials and polluted water treatment. We also concluded that the studies on resource utilization of drilling mud was inadequate. Conclusions The resource utilization of oily sludge has become a research hotspot currently. Further, the harmless treatment and resource utilization of oily sludge for greening planting soil could be regarded as an important research and development direction. [ABSTRACT FROM AUTHOR]