Oil and gas production handbook An introduction to oil ... - ABB Group

The illustration shows one typical format. This is the common format for the
NORSOK SCD standard. (Example for the Njord Separator 1 and 2 systems
control diagram). Essentially, the P&ID mechanical information has been
removed, and control loops and safety interlocks drawn in with references to
typical loops.
8.1.5 Telemetry/SCADA
Supervisory control and data acquisition (SCADA) is normally associated
with telemetry and wide area communications, for data gathering and control
over large production sites, pipelines, or corporate data from multiple
facilities. With telemetry, the bandwidth is often quite low and based on
telephone or local radio systems. SCADA systems are often optimized for
efficient use of the available bandwidth. Wide area communication operates
with wideband services, such as optical fibers and broadband internet.
Figure 32. SCADA system topology (typical)
Remote terminal units (RTU) or local controls systems on wells, wellhead
platforms, compressor and pump stations, are connected to the SCADA
110