An Advanced Real-Time Information System for Drilling has been under continuous development and rig-site testing since 1986. The objectives of this system are to provide significant increases in drilling efficiency and engineering accuracy while at the same time to enhance operational safety and optimize the data management associated with drilling operations.

Three important attributes distinguish this system from other "real-time" systems either existing or under development. First, the system provides "real-time" engineering models for decision support augmented by a "real-time" expert system. Second, the system can be interfaced with any data acquisition hardware. Third, it addresses a wider range of data analysis and engineering functionality.

This paper describes the concepts, design and capabilities of this system. Additionally, scenarios for its utilization in the field to optimize drilling operations are provided.

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