A data preprocessing system module used to improve predictive engine accuracy

An apparatus used to provide preprocessed variables to a predictive engine. The predictive engine generates predictive results, based on the variables, to automate well site operations. The apparatus comprises an analysis module, a pattern recognition module, and a library module. The analysis module identifies a well site operation by examining a well site operation variable, determines categories and standard operating procedures associated with the categories using the well site operation and a-priori information, and searches a library of historical information using the categories. The historical information comprising classified procedures and recommendations of historic well site operations. The pattern recognition module identifies a pattern using a statistics based algorithm. The algorithm uses the standard operating procedures, the categories, and the classified procedures and recommendations. The pattern indicating a deviation in the standard operating procedure. The library module classifies the well site operation variables and stores the classified variables.