Transforming Productivity

Key Benefi ts Large area monitoring withrobust co-located equipment

Path averaged detection limitsin the ppb range

Analytical results in seconds

Reliable continuous measurements in rain, fog, dust

Auto alignment and calibrationfor autonomous operation

Mapping Fugitive Emissions Using MIRICO’s ORION® Open Path AnalyserThe sensitivity, selectivity and enhanced remote sensing performance in demanding environmental conditions offered by the MIRICO ORION® open path solution provides a simple solution for the robust and accurate detection, localisation and quantifi cation of fugitive emissions.

Fugitive emissions present a signifi cant economic, environmental and health and safety burden to oil and gas operators. Total methane emissions across the oil and gas sector in the U.S. is estimated to cost several billion dollars in lost product. Robust continuous online monitoring of assets can signifi cantly reduce product loss, improve operational excellence, and advance plant health and safety.

Typically, leak detection is performed on foot using FID or optical gas imaging. This is laborious, expensive and intermittent, requiring signifi cant training of operators and risks missed cost saving opportunities and inaccurate inventories. Optical imaging is only suitable for detecting very high concentration methane leaks (>10,000 ppm) and typically require ideal conditions (low wind, clear skies). Even if the leak is detected, the accuracy of quantifi cation is very limited.1

Monitoring Emissions with the ORION®

Open Path AnalyserThe ORION® open path monitoring solution is designed for continuous online monitoring of industrial facilities.It incorporates:

Long range open path Laser Dispersion Spectroscopy2 (up to 400m)

Enhanced immunity to a®ospheric variations

A 360° rotating head, allowing a large area to be scanned using only a single instrument

Can be used in conjunction with advanced mapping algorithms for emissions detection, localisation and quantifi cation

The ORION®

Open PathGas Analyserfrom MIRICO1. Ravikumar, A.P., Wang, J., Brandt A.R., Environ. Sci. Technol. 2017, 51, 718−724

2. Daghestani, N.S., Brownsword, R., Weidmann, D., Opt. Express 22, A1731-A1743 (2014)

Application Note

Median emission rate (kg/hr)

Relative Eastings (m)10

100.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

20

30

40

50

60

70

80

90

100

110

20 30 40 50 60 70 80 90 100 110

Rela

tive

Nor

thin

gs (m

)

SummaryLaser Dispersion Spectroscopy enables reliable reporting metrics across a range of environmental conditions. The ORION® openpath platform provides a continuous, open-path fugitive emission monitoring solution. Controlled release studies demonstrate the system’s ability to accurately detect, localise and quantify fugitive emissions. Mitigation activities are supported by focusing leakrepair activity, leading to a more sustainable and effi cient facility. The risk of greenhouse gas release, product loss and potentialhealth hazards is reduced.

For further information, or if you have any questions about the ORION® open path system or its capabilities, please feel free to contact us on the details shown below.

Experimental Method

Controlled Release Rates 1.2 – 1.6 kg/hr per source

Release types 2m x 2m diffuse releases

Number of releases 17 (single- and multi-point)

MIRICO ORION® Analysis

InstrumentMIRICO ORION® Open Path + 3D Campbell Scientifi c CSat3 Sonic Anemometer

Analysis TypeLaser Dispersion Spectroscopy

Retroreflectors7x single corner cube, 60mm diameter

Gas CH4

Sensitivity 1 ppm.m

Temporal Resolution 1 s

Results

Rate Quantifi cation Accuracy Within 10%

Leaks Detected 100%

Localisation Accuracy Within 5m

Figure 2 shows the heat map analysis of the area generated by the software. Against the background reading, the ORION® open path system was able to identify the source of the methane release and provide a plot of the subsequent spread of the gas as it was dispersed downwind. The calculated location of the emission source (the yellow square showing the highest concentration) lay almost directly on top of the actual leak (the cross), indicating the accuracy of the calculations and effectiveness of the software.

+44 (0) 1235 612400 info@mirico.co.uk www.mirico.co.uk

Figure 2: Software visualisation of methane emission(actual location of emission marked by cross)

Figure 1: Illustration of experimental setup

Experimental DeploymentThe instrument is coupled with an array of 7 retroreflectors and a 3D ultrasonic anemometer (see Figure 1) to measure methane concentrations over a wide area with beam angle and length diversities. Calibrated releases were made from ground-based diffuse area sources to evaluate the instrument performance and demonstrate source mapping and quantifi cation.

The instrument data was processed using a proprietary mapping solution that employs Gaussian plume atmospheric eddy dispersion forward model using Bayesian statistics and Markov chain computations to solve the inverse gas transport problem.