Resource Monitoring and Rule-Based Notification. Applications in Subsea Production Systems Darijus Strasunskas Department of Computer and Information Science, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway Tel.: +4773590788; Fax: +4773594466 dstrasun@idi.ntnu.no Abstract. An industrially driven consortium launched the Integrated Information Platform project in 2004. The main objective was to extend and formalize an existing terminology standard for the petroleum industry (ISO 15926) in to formal ontology. The ontology is used in monitoring of drilling and production processes. The paper presents research in progress on development of rule-based notification in subsea production systems to monitor and analyze production data. The task is elaborated and exemplified by data from the real case. INTRODUCTION Subsea petroleum industry and production systems used there are information-intensive. When a well is put into operation, the production has to be monitored closely to detect any deviation or problems. Furthermore, the next generation subsea systems include numerous sensors that measure the status of the systems and send real-time production data to operation centers. For these centers to be effective, they need tools that allow them to understand this data, relate it to other relevant information, and help them to deal with the situation at hand. This paper reports on research in progress on rule-based resource monitoring and notification in the IIP project (Sandsmark & Mehta, 2004; Gulla et al., 2006). The project’s primary objective is to extend and formalize an existing terminology standard for the petroleum industry, ISO 15926 (2003). Using OWL Full sublanguage, this standard is transformed into a real ontology that provides a consistent unambiguous terminology for subsea petroleum production systems. The ontology is used in monitoring of drilling and production processes. The objective of this paper is to elaborate on the research in progress regarding rule-based condition monitoring of the subsea devices. One of the research questions is how to use the ontology together with a rule language (e.g., SWRL (Horrocks et al., 2004)). We are investigating how to combine rules with the ontology and what limitations are imposed by chosen OWL Full sublanguage to represent ISO 15926. A key requirement is to reason in a semantically consistent way by exploiting both the ontology and the rules. Since it is impossible to have at the same time decidability, soundness, completeness, performance and expressivity (Golbreich et al., 2005; Horrocks et al., 2003), we analyzing limitations and possible rule inference scenarios based on the current version of the ontology in OWL Full sublanguage. In case of too restrictive usage scenarios with regards to the expected features of the application, an alternative of automatic translation from ISO 15926 to OWL DL might need to be considered (Hakkarainen et al., 2006). Currently, we are experimenting with Protégé-OWL, ontology and SWRL editor, OWLJessKB for rule inference and Racer for reasoning. The paper is structured as follows. Next we introduce the IIP project and ISO 15926 standard. Later we elucidate the task of rule-based condition monitoring and notification in the project. Finally, we conclude the paper by discussing future work. THE IIP PROJECT The Integrated Information Platform (IIP) project is a collaboration project between companies active on Norwegian Continental Shelf and academic institutions, supported by the Norwegian Research Council. Its long-term target is to increase petroleum production from subsea systems by making high quality real-time information for decision support accessible to onshore operation centers. The IIP project (Gulla et al., 2006) addresses the need for a common understanding of terms and structures in the subsea petroleum industry. The objective is to ease the integration of data and processes across phases and disciplines by providing a comprehensive unambiguous and well accepted terminology standard that lends itself to