Abstract: The present invention relates to a system and method for managing subsurface data, creating a knowledge database for containing said subsurface data containing data sets representing data concerning a subsurface feature, and including input means as assumptions and documentation for receiving information regarding data quality related to the subsurface data elements in said knowledge database constituted by a quality factor. Each data set include information related to subsurface features as well as a quality factor related to the data quality of the data representing the subsurface features in each information set.