"Over the past thirty years, Permanent Downhole Gauge (PDG) systems have become essential in reservoir and production engineering. However, maintaining their ongoing functioning requires reliable fault diagnosis and proactive maintenance procedures. This study explores fault diagnosis methodologies and prognostic maintenance approaches specifically designed for PDG systems. The objective is to improve the reliability and longevity of these systems while minimizing non-productive time (NPT). By doing so, this research aims to enhance production efficiency and reduce costs in oil and gas development and production processes.
We perform a comprehensive evaluation of the current PDG behaviour, examine data collected from the field, and employ diverse fault diagnostic techniques to compile a list of spare components for internal maintenance purposes. The Plant Information platform consolidates data for monitoring and surveillance, facilitating real-time remote monitoring of all PDGs from an office setting. A significant obstacle faced by oil and gas operators is the decline in production efficiency and the rise in costs associated with development and production procedures. This study examines various approaches for identifying defects and their underlying causes, as well as predictive maintenance techniques aimed at ensuring the reliability and durability of PDG systems.
We investigate prognostic maintenance strategies, including as condition monitoring and predictive analytics, to identify imminent failures and improve maintenance schedules. The integration of these several techniques aims to enhance the dependability and efficiency of permanent downhole gauge systems, enabling uninterrupted data collection and prompt repairs to prevent expensive periods of inactivity. We assess the efficiency and real-world use of the suggested methods by creating a defect diagnosis database, maintaining an inventory of spare parts on-site, and integrating them with the Plant Information (PI) platform. The utilization of fault detection methods, root cause databases, various troubleshooting techniques, and the accessibility of spare parts collectively enhance the maintenance of PDG systems, hence ensuring their consistent and reliable operation in oil and gas production environments. This exercise enhances the flow rate by approximately 5 kbopd, reduces downtime by 47%, and minimizes the cost of slickline intervention by 35%."
