Abstract:  According to the safety risk analysis of offshore heavy oil thermal recovery process. The possible safety risk factors of offshore platform steam flooding thermal recovery production process are classified. The possible consequences of risk factors are assessed and graded based on preliminary hazard analysis and risk matrix method, in order to promote the risk identification and hidden danger rectification work of thermal recovery, The research results have certain guiding significance for the construction of double prevention mechanism of thermal recovery in offshore heavy oil fields.

Key words: offshore platform, heavy oil thermal recovery, hot steam flooding, risk assessment