Pipeline Integrity Monitoring with DAS

Transcription

1 Pipeline Integrity Monitoring with DAS Protecting your Pipeline Assets with LivePIPE Copyright 2015 Fotech Solutions Ltd. All rights reserved. This document and the information in it are provided in confidence. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and or publication of this material or use of this material other than for its intended purpose is strictly prohibited without the express written permission of Fotech Solutions Limited.

2 Fotech Group Ltd FOTECH SOLUTIONS LTD LINEAR ASSETS Third Party Intrusion (TPI) Leak Detection Security Delivering Distributed Acoustic Sensor (DAS) Solutions for Linear Assets FOTECH OIL & GAS LTD Completions Production Well Integrity

3 Distributed Acoustic Sensing LivePIPE Through the precision of Helios DAS sensor surveillance and powerful decision processing of the Panoptes Alarm server, LivePIPE delivers high confidence alarms to: Malicious attack Third-party intrusion (TPI) Mechanical and Manual excavation Hot-tapping Leak Detection Personnel and Vehicle tracking PIG tracking LivePIPE Module

4 Pipeline Integrity Management LivePIPE Components The Monitoring & Sensing Station - Helios and Panoptes Both Helios and Panoptes are co-located during normal operation. Often the hub to process all sensory data The Sensing Station - Helios Sensor A single long-range monitoring solution. This station is used for a layout requiring multiple Helios units networked together. The Monitoring Station - Panoptes Server A data processing station used to integrate the Sensing Stations output. Architecture Configurations

5 Pipeline Integrity Management LivePIPE Components

6 Distributed Acoustic Sensing LivePIPE Integration: Helios DAS A single Helios DAS unit converts and monitors up to 40km of fibre optic cable (FOC), turning it into tens of thousands of highly sensitive vibrational sensors. Simple to install Low development cost Low maintenance costs Immune to EM and RF interference User friendly system configuration Helios Unit

7 How it works Distributed Acoustic Sensor (DAS) The Fibre is the Sensor

8 How it works Distributed Acoustic Sensor (DAS) Using standard Single optical fibre: Pulses of light are sent, Backscattered light is received.

9 How it works Distributed Acoustic Sensor (DAS) The backscatter is interrogated for: Changes Caused in characteristics by acoustic energy

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11 Distributed Acoustic Sensing Fibre Deployment Deployable using pre-existing fibre, retrofitted to existing assets or installed alongside during construction. Standard single Mode telecoms grade optical fibre, (15xx ITU G652 series) clad in polyimide or acrylate materials Surface Fibre end terminations require a clean end profile (minimal point optical reflection) Automated 'Fibre Break' Alarm algorithm may be installed to ensure warning of any fibre integrity issues Buried Retrofit existing pipelines Install along side during construction

12 Fiber Placement Fiber incorporated in pipe structure Best coupling for acoustic detection Eliminates variations from soil conditions Eliminates variations from soil types Allows detection of Negative Pulse Pressure measurements

13 Acoustic & Thermal Effects of Pipeline Leaks Fibre installed 1m from pipeline Fibre strapped to pipeline Rupture causes immediate acoustic burst Persistent acoustic signal from turbulent flow through rupture 1. Pipeline Localised wash-out and temperature changes cause permanent strain changes in geo-environment Product release can cause localised spreading temperature changes Joules-Thomson effect creates cooling as P changes Hot products warm up environment around leak Negative pressure pulse travels continuously up and downstream at the speed of sound Copyright Fotech Fotech Solutions Solutions Ltd Ltd

14 Pipeline Integrity Monitoring LivePIPE Leak Detection Application Understanding that a leak is not a simple event is the core of leak detection. LivePIPE harnesses a multitude of acoustic and thermal data from a leak incident and distils it into a confident alarm. High impulse energy at a specific frequency detected & identified as a leak Rupture events An immediate acoustic burst as integrity of the pipe fails. Thermal gradient (DTGS) Temperature disturbance caused by the product cooling or warming the environment around the leak. Turbulent flow A persistent acoustic signal, generated from flow through the point of rupture. Negative pressure pulse (NPP) NPP travels up and downstream of the leak, identified by velocity tracking algorithms. Soundfield of 850 BPH leak at 2 valve ( Hz response) The detection and identification of leak events depends on the acoustic energy of the event reaching and causing strain on the fibre. Coupling of the fibre to the pipeline is recommended. Soundfield of 80 BPH leak at 2 valve ( Hz response)

15 Distributed Acoustic Sensing LivePIPE Integration: Panoptes Panoptes includes the Accumulator Functionality. Confidence levels escalate based determined by pre-set time and location based parameters, and the client is able to select the level of alert received. In addition to alarm generation, Panoptes provides: An alarm management portal, Complete with alarm handling controls, Historical alarm storage User management controls Confidence Levels

16 Example Mechanical Digging Time Relay being opened Energy released at point of physical damage to OFC Distance

17 Pipeline Integrity Management LivePIPE Interface & Control 1. Installer Interface (HWI) Real-time monitoring & control software installed on Helios. 2. Operator Interface Fotech s proprietary server Panoptes & alarm handing GUI. 3. Interface, client integration Integration with multiple platforms including SCADA.

18 Pipeline Integrity Management Network Integration LivePIPE is configured and tested before deployment Supports remote monitoring and tuning. All IP and network settings can be set and tested pre-fat. Alarms are sent using XML over HTTP, Binary, or SMS Integration into control rooms with SCADA over Modbus, websites, CCTV, security management systems or GIS systems System incorporates information security components for configuration and connection to client network infrastructure LivePIPE GUI

19 Copyright Fotech Fotech Solutions Solutions Ltd Ltd

20 Pipeline Integrity Monitoring LivePIPE Case Studies East Coast Russia Ecuador India >40 km Pipeline Existing fibre buried at 1-2m depth TPI application Geohazard PoC 124 km Pipeline Existing cable buried at 1.5-7m depth TPI & Leak Detection Calibrated for high-threat alarms only 74 km Pipeline Existing 10 year old cable buried at 1-2m depth TPI application System calibrated to remove heavy pump noise