Abstract: To analyze factors influencing safety level in a given oil-gas tank area, and study the relationship between safety level and safety input in this area, an influence factor SD model was built based on the theory and method of SD. At first, a causal cycle diagram was established from three macro dimensions of human safety behavior, safety management and device. Then, a stock flow diagram was constructed on the basis of considering the micro factors. Effects of the factors on the safety level were simulated qualitatively and quantitatively from both the macro and micro perspectives. The result indicates that the improvement of safety level in oil-gas tank area needs long term and continuous safety input, that in terms of contribution to the safety level,there is a descending order of safety behavior level, safety management level and device safety level,and that in micro factors, the safety education training has maximum influence on the safety level.

Key words: oil gas storage tank area, system dynamics(SD), simulation analysis, influencing factors, safety investment