CONTROS_Leak_Detection_ rr

sophisticated underwater gas detection sophisticated underwater gas detection

CONTROS’ Mobile Leak Detection System

sophisticated underwater gas detection


Outline i.  About CONTROS

ii.  Introduction

iii.  Hydrocarbons in sea water

iv.  Detection of hydrocarbons in seawater

v.  Mobile Leak Detection System

vi.  Key Technology Optical Sniffers

vii.  Features and Benefits


About CONTROS Facts:

•  Established in 2003 •  Based in Kiel / Germany •  21 employees + freelancer

Fields of Business: •  Hydrocarbon and CO2 Sensor

Development •  Hydrocarbon Leak Detection Systems •  Methane Hydrate Exploration & Research •  Environmental / Greenhouse Gas

Monitoring •  Industrial Development Projects •  Lake Gas Extraction Systems / Process

Monitoring •  CO2 Applications / CCS


CONTROS‘ Expertise

•  Sensor, Membrane and System Development •  CO2, CH4, MEG & PAH •  Surface to 6.000 m •  Subsea Engineering and Technical Integration •  Data Management and Modeling


Sensors and Systems for O&G HydroCTM Sensors:

•  Hydrocarbon Sniffers (CH4 and PAH) •  MEG Sniffers •  High Pressure Sensors

Systems: •  Mobile Leak Detection Systems •  Leak Detection Monitoring Systems •  Pipeline Pre-Commissioning Systems

(MEG) •  Environmental Monitoring Systems


CONTROS’ Leak Detection History 2008: Utilisation of CONTROS’

Methane and PAH Sniffers for detection and localisation of natural Methane Seeps in the German North Sea

2009: Development and marketing of a Mobile Leak Detection System for ROV Pipeline Inspection

2010: Ongoing field test for permanent Leak Detection Monitoring System


About hydrocarbons in seawater

•  Hydrocarbons in seawater are a multiphase mix: •  oil phase •  gas bubbles •  dissolved gas in seawater •  formation water •  cold seawater •  solid gas hydrate phase

•  The oil phase contains significant amounts of PAH

•  The gas phase contains mainly Methane

(Zheng et al., 2002)


About the detection of hydrocarbons in seawater •  Hydrocarbon leaks can be

detected directly by suitable sensors or indirectly by measuring the associated anomaly.

•  Associated anomalies in the environmental baseline can be measured with a CTD: •  Salinity changes •  Temperature changes •  Density changes

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Basic Principle of CONTROS MLDS 1.  Detection and localisation of leaks (where?)

•  quick sensors with low detection limit •  direct and indirect methods

2.  Qualification of leaks (what?) •  reduces false alarm rate •  direct methods only •  selective methods

3.  Quantification of leaks (how much?) •  direct methods only •  very precise sensors


Basic Principle of CONTROS MLDS

Inlet attached to manipulator for wipe test on e.g. flanges.

MLDS mounted on ROV frame

Coil tube as flexible connection between inlet and pump


MLDS Layout

CTD

Pump HydroC CH4

Optical Sniffer

HydroC PAH 1/2‘‘ coil tube with ROV

handle


MLDS Specifications Application: Detects oil and gas leaks at subsea structures and pipelines Operational depth: Down to 3,000 m Temperature: 0°C to 15°C / 32°F to 59°F Measuring ranges:

CH4: 0 – 50 !mol/L ± 0.3 !mol/L PAH: 0 – 500 !g/L Temp: -4 - +40 °C ± 0.1 °C / 24.8°F to 104°F Cond: 0 – 60 mS/cm ± 0.001 mS/cm Press: 0 – 4000 dbar ± 1 dbar

Reaction time: < 10 sec Size: Standard configuration 520 x 170 x 200 mm" Weight: 14.3 kg in air / 9.2 kg in sea water Material: Titanium Grade 2 / Stainless Steel 1.4404 Pump: enwave Deep Sea Pump, 3.3 L/min for FT variant Power supply: 12 / 24 VDC @ 18W (max. 36 W on start-up) Connector: SUBCONN® MCBH8-M-TI 8-pin Digital Output: EIA-232, 19200 Baud, 8 data bits, no parity, 1 stop bit., no flow control. Data Output: Data format ASCII NMEA-0183 Software: With DETECT™ Software Suite

incl. GIS for graphical data visualization


Leak Detection Software Suite •  Graphical display and interface to

ROV operator display for semi-automated detection and localization

•  Expert mode for subsequent qualification and quantification of leaks

•  Shapefile Geo-Tiff and BSB import and export (e.g. pipeline tracks)

•  Integrated Survey Planning and Simulation Tool

•  Supports full range of standard oceanographic sensors


Leak Detection Software Suite

Expert Display

Graphical Display


Key Technology: HydroCTM Optical Sniffer

1.  Dissolved gasses and water vapor pass the hydrophobic membrane --> Equilibration

2.  Gas concentration measured by non-dispersive infrared spectrometry (NDIR) within a gas circuit

3.  Internal Datalogger saves CH4 along with T, p and RH; optionally the data is transmitted by cable


HydroCTM Optical Sniffer Optical Sniffers... •  use a selective method,

i.e. just the component of interest is being detected (Methane) and thus minimize the false alarm rate significantly

•  detect very small emissions and thus allow for a very low detection limit

•  are unaffected by saturated solutions and cross-contaminations


Example Pipeline Inspection Northsea 2009


Sensor Selection

•  Direct detection by HydroCTM optical CH4 Sniffer for gaseous and dissolved Methane

•  Direct detection of oil in water by PAH sensor (fluorescent)

•  Indirect detection by Seabird CTD for temperature and salinity changes


Sensor Selection


Results Methane Sniffer


Methane: Response Time vs. Location

Good correlation between signal and feature


Outlook: Permanent LD Monitoring System


CONTROS‘ Service Offer •  Design and Layout of LDS •  Implementation and technical

integration of LDS •  Rapid Prototyping •  Worldwide cooperation with

Service Contractors •  On-Site Training •  Service Contracts •  24/7 Hotline •  Worldwide Maintenance and

Repair Service

sophisticated underwater gas detection sophisticated underwater gas detection

Please contact Chris Roper for additional information, price and delivery.Tel. 805 798 0277 [email protected]

Date post:	22-Mar-2016
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