Abstract
In recent years, with the diversification and complexity of newly discovered natural gas resources in China, the field practice of gas reservoir engineering is facing challenges, and there is an urgent need for new ideas, new technologies and new practices to solve these problems. Facing the challenges of complex gas reservoirs and the basic requirements of "simplicity and practicality" of gas reservoir engineering, the "1+4" mode came into being, exploring a new way to improve the field application level of gas reservoir engineering in China natural gas field. This paper expounded the basic concept and core connotation of the "1+4" mode and discussed the two necessary conditions for its implementation, it also put forward some suggestions to promote the implementation of "1+4" mode. At present, the "1+4" mode had achieved preliminary results in the development of marine carbonate gas reservoirs in Sichuan Basin. In the future, the "1+4" mode will release great potential, improve the vitality and applicability of gas reservoir engineering, and provide guarantee for the scientific development of complex gas reservoirs.