Abstract: Applying the geosteering software to control the well trajectory of horizontal well precisely is the key to improve the reservoir drilling rate and efficiently develop unconventional oil and gas fields. By virtue of literature research, this paper overviewed the development and application status of domestic and foreign geosteering software and discussed the key modules of geosteering software and the algorithms to realize modular functions. Then, based on domestic actual situations, the suggestions for the localization of geosteering software were proposed. Finally, the future trend of geosteering software was predicted based on the actual exploration and development demand and the technological development direction.