Parssaman

Khangiran is the major gas field in North East Iran, near the Turkmenistan border, and it supplies gas to North Eastern provinces through Hasheminejad refinery plant. This gas field has been operational since late 1970s and consists of 32 sour gas wells, 3 gas gathering centers and a central measuring station which is the connection point to the refinery.

The SCADA project includes design and implementation of a central supervisory and control center to encompass all sour gas wellheads and their corresponding gathering centers. This SCADA network is destined to replace the current system of local operation of wells by humans and will provide the client (East Oil and Gas Production Company, a subsidiary of ICOFC) with a robust, reliable and fast supervisory and control network.

The backbone network for data transmission is implemented using ADSS fiber optic cables and data switches. Remote Terminal Units (RTUs) are being used for data collection from existing control panels. SCADA software installed on industrial servers and PCs is used in the control center as the monitoring and control unit. The project also includes the replacement of an old analog PABX with a modern state-of-the-art IP based telephone switch. VoIP will be used to provide a reliable telephone network in all wellheads and gathering centers, as well as local and remote office buildings.

Scope of work

Khangiran SCADA project has been awarded to Pars Saman on a "PC" basis. However, due to the complexities of the project, including the necessity of interfacing with old control panels, the company has had to do a comprehensive review of the detail engineering, especially for control panel equipment. The company is currently in the process of installation and commissioning of the equipment.
Scope of the project includes 6 major sections:

RTUs and interfacing systems with the existing control panels
The existing control panels are based on various types of PLCs which are supposed to continue the task of local control of the well heads and gathering centers. The RTUs of SCADA project are supposed to interface with specific signals on the panels and transmit them to the control center. Due to the variety of the PLCs and panels, the task of interfacing with old equipment with minimum shut-down time in the wells' operation is highly complex and challenging.
Wellhead control system revamping
Due to the out datedness of PLCs in several stations (mostly Allen-Bradley systems in wellheads and gathering centers), a new PLC will be installed, programmed and commissioned to replace the old control system. The new Siemens S7 PLC will take full control of the operations and alarming, as well as the task of transmitting the data to the control centers.
Ethernet switches for data transmission
The backbone of the network is a wide-spread Ethernet-based network. Each well-head is equipped with an Ethernet switch which receives input signals from the RTU/PLC and transmits it to its corresponding gathering center over optical fiber. The core switches in the gathering centers and also Central Measuring Facilities (CMF) transmit data to the Control Center (CC) using redundant fiber cable lines with a bandwidth of 1000 Mbps.
ADSS Fiber Optic Cable
Aerial Self-Support cable is used for physically connecting the wellheads to gathering centers and then to the control center. The cable has 6 optical cores and is installed on top of the 20kV power lines which already exist in the field.
Control Center
The control center consists of a redundant LAN which interconnects 2 SCADA servers, 2 SCADA operator consoles, 1 SCADA Engineering console and 1 Network Management Console. All servers and PCs are of industrial type. The HMI software installed on servers and consoles enables the engineers and operators to monitor up to 8192 tags. A modern video wall (4m x 2m) will be used as the main display mechanism.
IP-Based Telephone Exchange
The out dated analog PABX will be replaced with a modern IP-based exchange, providing VoIP extensions to remote sites and also VoIP and normal digital extensions to office buildings and managers. The exchange will also provide communication with ICOFC central offices in Mashhad and Tehran.

Scope of Supply

RTU/PLC: S7-300 Family	Siemens (Germany)
SCADA Software: WinCC	Siemens (Germany)
ADSS Fiber Optic Cable	Ericsson (Sweden)
Ethernet Data Switch
Industrial Servers and PCs	Advantech (Taiwan)
UPS	JDEVS (Iran)
IP-based PABX	Alcatel (France)
Battery	Platin Iran Co.(Iran)
GPS Master Clock	Vortex Communications (UK)
Video Wall	Barco(Belgium)
Cable Tester, OTDR, Fusion Splicer, etc	Corning, Fluke, Fujikora

Main Features

The first on-shore upstream Oil and Gas SCADA network in Iran
Interfacing with various types of existing PLCs and control panels
Critical importance of the operation of the field with minimum shut-down time
Total revamping of old control panels and combination of RTU/PLC functionalities in a very critical application
Implementation of a secure and robust network for future voice and data applications, including video conferencing, CCTV, VoIP, etc.
Extremely high amount of Sulphur in the outgoing gas which make HSE procedures more than crucial
Vast geographical area of the project execution site

Click here for larger image