1. A Cost Effective Means to Transmit Real-Time and Archived Well Data
4/17/2017
A Cost Effective Means to Transmit Real-Time and Archived Well Data
By: Abdullah Alkhalifah, P&CSD/PCD/PASU
24-25 November 2008

2. Outline Overview of SCADA Technology
4/17/2017
Outline
Overview of SCADA Technology
SCADA Evolution in Oil & Gas Operations
Operational Requirement and system Architecture
Data Acquisition over Low Speed Networks
Proposed Method
Challenges and Opportunities
Conclusion 2

3. Overview of SCADA Technology
4/17/2017
Overview of SCADA Technology
Alarm Handling and Acknowledgment in Server
SCADA Vs DCS … a common question
data-gathering oriented.
Uses Shared Data Network/open protocols
Hardened Environmental Spec.
Server Redundancy
Number of IO’s 50K/Server 3

4. Overview of SCADA Technology
4/17/2017
Overview of SCADA Technology
SCADA Vs DCS … a common question
Alarm Handling and Acknowledgment in Controller
DCS is process oriented
DCS use proprietary network/Protocol.
DCS Controller Environmental Spec.
Controller Redundancy
Number of IO’s Less than 5K /ctrl 4

5. SCADA Evolution in Oil & Gas Operations
4/17/2017
SCADA Evolution in Oil & Gas Operations
60’s and earlier
Simple Press & Temp Gauges on the wellhead.
In Plant Well Testing Facilities
Local Logging on well data.
80’s
Remote Testing Facilities.
Automated Logging of well data.
2000+
Specialized Inelegant Subsystem P/T/Q readings and Data logging.

6. Data Scan on High speed Links
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Data Scan on High speed Links
High Speed, High Bandwidth
Segregation and Security
Data Storage and retrieval on comm failure.
Device capability
File Format
SCADA Communication Network F.O
PDHM
MPFM
ESP
Log File

7. Number of MODBUS slave can be accessed
File
Format
File Size MB
Scan
Freq.
(sec)
Percentage of channel utilization dedicated to real-time communications
20%
35%
50%
65%
80%
XML
6.18 1 3 2 5 17 14 11 7 4 10 35 28 22 15 8
CVS
3.5 6 31 25 19 13 62 51 39 27
Binary
0.99 18 9
110 90 69 48
221
180
138 97 55
Short Binary
0.33 66 54 41 29 16
332
270
208
145 83
665
540
416
291
166

8. Data Scan on low speed Links
4/17/2017
Data Scan on low speed Links
SCADA Communication Network
Serial, UHF Radio
PDHM
MPFM
ESP

9. Data Scan on low speed Links
4/17/2017
Data Scan on low speed Links
SCADA Communication Network
Serial, UHF Radio
PDHM
MPFM
ESP

10. Challenges and Opportunities
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Challenges and Opportunities
Current Reality
Functional Specification Document for each project.
Different approach for the same requirement.
Communication Protocol features.
Tele-Control Communication Network by IT.
Multiple services on the same network.
Impact on real time data.
Segregation of Process Data/IT services
I-Field requirements.
1 sec Data Update Time, No data lost, Data storage at field device.
Several Specialized Devices
Scan rate for each application.

11. Saudi Aramco Initiatives
4/17/2017
Saudi Aramco Initiatives
Standardization
Standard Functional Specifications Document.
Identify specific requirement for each application.
Provide Standard Implementation methodology.
New Engineering Standard
Standard Communication Protocol.
SCADA Communication Architecture Best practices.
International Initiatives such as Intelligent Well Instrumentation Standardization (IWIS).

12. Summary Standardize Functions Implementation methodology.
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Summary
SCADA Applications are Evolving.
Demand for more Reliable at High scan rate DATA is increasing.
Communication Infrastructure Plays Major role on the over all SCADA Performance.
User looks for Fully Integrated solution (SCADA+RTU).
User Support Open Industry Standard communication Protocols.
Standardize Functions Implementation methodology.

13. 4/17/2017
Thank You!