M gas field has a tight gas reservoir without nature fractures. Its effective porosity is heavily reduced by mineral cements diagenesis. Hydraulic fracturing was executed in order to get high productivity. However, the production performance of some hydro-fractured well did not achieve target production rate, which would affect the production capacity of the whole gas field directly and increase the risk of fracturing development in the future. This article studied the reasons for the unsuccessfully fracturing of the well from geological and engineering aspect. Accordingly, statistical hydraulic fracture reservoir modeling and reservoir numerical simulation approach were proposed to optimize hydraulic fracturing engineering scenarios. Key parameters of hydraulic fracture were summarized by fracture design reports and industrial practice, and then were applied to the numerical simulation. Then the fracture parameters were optimized and revised interactively between the geological and reservoir simulation model based on the observation on production performances in the successfully fractured producers. Finally, the obtained fracture properties were applied to unsuccessfully fractured wells. The reservoir model built in the study revealed that the reservoir around the wells is with moderate porosity and gas saturation, which means there are enough hydrocarbon to be developed. However, from the post fracture report, the formation was not effectively fractured with the fracture length range from 28 to 80 m, which are too short to achieve a good fracturing effect. Based on the optimized geological model, the fracturing parameters of the unsuccessful well were re-simulated. The simulation result shows that the production rate in the unsuccessful fracturing wells has a stable initial gas rate of 5 MMscf/d more than 3 years and a total gas production of 21.6 Bcf. The significant increase in production shows a great geological potential of the reservoir around the producers. This study has positive influence on the benefit of the whole gas field and the future development. At the same time, the fracturing model building method proposed in this paper is of reference significance for similar artificially fractured gas reservoirs.