GAS & OIL INDUSTRY
EDAR can measure absolute amounts of methane leaks from natural gas wells.
EPA’s Air Rules for the Oil & Natural Gas Industry have new requirements for processes and equipment at natural gas well sites. The new rules of the Source Performance Standards (NSPS) for volatile organic compounds (VOCs) and the National Emissions Standard for Hazardous Air Pollutants (NESHAP) for oil and natural gas production cover the equipment and procedures at the well site. The path from the wellhead to the transmission line contains many gas-driven controllers and actuators. Natural gas must be treated before inserted into the transmission pipeline through a process such as dehydration. This process requires a multitude of valves, fittings, and connections.
In a Gas & Oil application, EDAR detects and quantifies methane leaks from wellheads. EDAR is equipped with a large aperture scan head and instead of scanning back and forth, it creates any pattern. Methane gas exiting the cone is detected and quantified using the same techniques as car exhaust remote sensing. Wind speeds are calculated using a local weather station or wind Lidar. Once the wind velocity is established, the flow rate is calculated, and leaks are quantified in units of amounts per time, e.g., ft3/hour.
Since EDAR measures the amount of methane at any one time, it can also measure the rate at which the methane is crossing the barrier of the laser scan by just measuring the wind velocity.
The nature of EDAR's technology eliminates the need for any calibration. EDAR’s patented technology uses similar principles as existing satellite remote sensing platforms. It can remotely measure quantities and relative amounts of targeted molecules in a plume. Due to the absolute nature of the measurement, calibration is not necessary. This platform gives our data more accuracy, precision, and consistency and allows for minimal human operational intervention.
Customizable Scan Head:
EDAR can scan in 2 dimensions creating any pattern using an XY scan head. EDAR uses variations of the DIAL method to measure and quantify atmospheric gases independent of temperature and pressure.
Options for EDAR Applications in Gas and Oil:
Fence line Monitoring – around the clock remote detection and quantification of emissions in real-time.
Mobile Mounted Monitoring – vehicle mounted with an EDAR system on a pole to locate, detect, and quantify leaks.
Monitoring of Wellhead – detect and quantify leaks at the source as well as around connections, fittings, and valves.
A few examples of FTIR limitations include:
IR cameras cannot see or measure gas if it is the same temperature as the ambient surroundings.
Passive FTIR systems need the plume to be at relatively high temperatures and they cannot image the plume.
SOS FTIR systems depend on the sun’s position to measure column amounts, but they are not able to use the most sensitive methane absorption features because ambient amounts remove the sun’s light at those wavelengths.
In comparison, EDAR’s unique approaches include:
EDAR can scan up and down and side to side and in various configurations to perform fence line monitoring.