In order to solve the issue of producing oily sludge in oil fields,proper treatment technology of oily sludge suitable for Ansai oilfield is explored by drawing on the maturepractices and experience of some domestic oil fields with comparative analysis and selection of feasible processes. Pilot applications are conducted to analyze and evaluate the conditions of microbiological degradation, profile regulation of injection wells, operation of sludge treatment plants and brick-making. The optimum process of cutting, thermochemical treatment, industrial brick making and degradation are summarized.The process of oily sludge treatment is economically feasible, safe and environmental friendly.It provides reference for the exploitation and utilization of resources.