College of Petroleum Engineering,Southwest Petroleum University, Chengdu
At present, the problem of waste drilling fluid pollution has been attracting much attention. Although the treatment technology of waste drilling fluid has been improved continuously in recent years, the problem of waste drilling fluid pollution has not been solved from the source. This paper summarizes the research status of various environmental drilling fluid additives at home and abroad, and points out that natural polymer additives have simple manufacturing process, wide source of raw materials, but poor resistance to mild and pollution. Modified natural polymer primer has strong resistance to high temperature and pollution, but its production process is complex. Environmental synthetic polymer primer has stable performance, strong resistance to mild and pollution, but high cost.Through analysis and summary, it is concluded that the environmental drilling fluid additives with high temperature resistance and strong anti-pollution ability has a good development prospect.The application of environmentally friendly drilling fluid treating additives can not only reduce the cost of waste drilling fluid treatment, but also solve the problem of drilling fluid pollution from the root. Therefore, the research and application of drilling fluid additivesis is the key to solve the problem of drilling fluid pollution.