Samarang is an existing oil field in offshore Sabah, East Malaysia, developed in 1975. It comprises of 7 wellhead, 3 production, 1 gas compression platforms and 1 Living Quarters. Majority of the platforms are provided with fully pneumatic instrumentation / control and shutdown systems, with no provision for remote monitoring/control except for SMG-A and part of SMDP-A.
Under Samarang Re-development project to increase Samarang production and improve reserve recovery, Integrated Operation (IO) applying real time optimization concept will be implemented.
The main challenges to achieve Samarang IO a real time monitoring and operation environment are as follows:
Extensive re-instrumentation work such as installation of electronic transmitters for wellhead and other surface facilities, actuated choke valves for gaslift control, sand monitoring system, downhole gauges & ICVs for smart wells, interfacing with well test meters, operational flowmeters, compressor control panels, instruments associated with separator & crude oil transfer pump etc.
Remote Terminal Units (RTU) for the remote unmanned satellites which require certification for Zone-2 hazardous area and weather proof to IP65
High reliability and availability designed RTU with dual redundant, hot failover and data buffering up to 5 days.
High Availability (HA) data historian configuration with hot failover PI interfaces data collection nodes to enable continuous and uninterrupted surveillance and optimization process.
Real time monitoring and control HMI at offshore Central Control Room (CCR), Operation office (SBO) and HQ in a Tri-Node Collaborative Working Environment.
The data communication upgrade from remote satellites to mother platform through Wireless Ethernet Radio using TCP/IP-DNP3 protocol; from offshore to onshore (about 55km) through Digital Microwave Radio and leased lines
This paper describes the implementation of Samarang IO key infrastructure – The Real Time Data Acquisition and Control System and underscores its benefits towards achieving real time monitoring and operation.