At present, the new shallow 45 fault oil field has entered the high cycle stage of huff and puff, which is affected by the static, dynamic factors such as fault, reservoir physical property, steam channeling, edge water and recovery situation. There are a lot of issues such as low pressure, low daily level of single well, low oilgas ratio, more shutting down wells, more inefficient and ineffective production wells, poor development efficiency. In order to improve the development effect of reservoirs and further improve the oil recovery factor, on the basis of comprehensive analysis of the production and development dynamics of the block, meanwhile, integrating earthquake and geological analysis, the distribution features of remaining oil were found out using fine geological modeling and numerical simulation. And the evaluation criteria of five kinds of remaining oil types was established according to the parameters such as the average remaining oil saturation and the recovery degree of single well. The research method suitable for single well remaining oil distribution law was summed up, providing guidance for subsequent fine adjustment and tapping the potential in oilfield.