(16b) Autonomous Remote Gas Detection Using Optical Imaging Technology

Title:
Autonomous Remote Gas Detection Using Optical Imaging Technology

Authors:  Jon Morris, Providence Photonics, LLC (jonmorris@providenceeng.com);

               Hazem Abdel-Moati, ExxonMobil
Research Qatar (hazemm.abdelmoati@exxonmobil.com)

ExxonMobil Research Qatar has partnered with a U.S. based
firm, Providence Photonics, to develop a Remote Gas Detection (IntelliRed?)
technology that integrates computer vision algorithms and infrared (IR) optical
technology to achieve autonomous detection of hydrocarbon plumes.   The IntelliRed? system is designed to
provide early warning to operations personnel 
in case of gas releases and to detect fugitive gas emissions but could
also have application to monitoring critical pieces of equipment for abnormal
temperatures and to assist in plant security by monitoring fence lines for
intruders.

The IntelliRed? system utilizes an IR camera and integrated
cooler assembly, paired with a computer vision algorithm that analyses the
video output from the IR imager to determine the presence of hydrocarbon
plumes. Most hydrocarbon plumes have strong absorption peaks in a narrow
mid-wave IR region. The algorithm takes advantage of the difference in contrast
between a hydrocarbon plume and the background in each pixel of an IR image and
the temporal changes due to plume behavior for the analysis. The algorithm
compares sequentially collected IR images and uses a multi-stage confirmation
process to confirm the detection and has multiple filters that mitigate
interferences like steam, and other moving objects such as humans and
trees.   

The IntelliRed? camera assembly enclosure has obtained
explosion proof certification using the ATEX standard to allow for deployment
at classified/hazardous areas in oil and gas processing facilities. Instrument
air is used to purge the system. Multiple deployment opportunities at process
facilities are currently underway. Results from field testing at these process
facilities will help researchers investigate the effect of temperate and harsh
weather conditions, the effect of varying temperatures and gain a better
understanding of equipment wear and tear and maintenance requirements.  

Work has also been undertaken to compare the performance of
the IntelliRed? system versus existing detection technologies, most commonly
point and path detects.  Existing
technologies require dispersed gas to physically contact the point sensors or
move between the source and sensor of a path detector while the IntelliRed?
system can detect hydrocarbon plumes remotely. 
Field testing shows that the IntelliRed? system can provide early leak
detection as compared to traditional technologies.  The results of these comparisons will be
presented.