Granted Patent B2

US 12,254,622 · App. 18/480,279 · Granted Mar 18, 2025

Inventors: Andrew J. Speck (Milton, MA); Manasi Doshi (Cambridge, MA); Lukasz Zielinski (Arlington, MA)

Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION

G06T7/001G01M3/16G06T7/62G06T2207/20221G06T2207/30232H04N23/695

Abstract

Claims (95)

1. A method for determining an emission rate of a fugitive gas, comprising:

receiving, from an imaging device, a first gas density image;

detecting the fugitive gas in the first gas density image;

delineating the fugitive gas in the first gas density image;

sending, to the imaging device, instructions for adjusting a bearing of the imaging device bearing to optimize a position of the fugitive gas in the imaging device's field of view;

sending, to the imaging device, instructions for capturing a second gas density image;

receiving the second gas density image from the imaging device;

calculating, based on the second gas density image, the emission rate of the fugitive gas;

prior to sending the instructions for capturing the second gas density image, determining that a percentage of the fugitive gas is present in less than a threshold percentage of a vertical field of view of the first gas density image; and

in response to the percentage of the fugitive gas being below the threshold percentage, sending, to the imaging device, instructions for modifying a zoom of the imaging device so that the fugitive gas is present in more than the threshold percentage of a vertical field of view of the imaging device.

2. The method of claim 1 , further comprising:

prior to sending the instruction for capturing the second gas density image, determining that the second gas density image includes a first portion of the fugitive gas that does not include all of the fugitive gas;

sending instructions to the imaging device for capturing a third gas density image that includes a second portion of the fugitive gas that is horizontally adjacent the first portion of the fugitive gas;

receiving, from the imaging device, the third gas density image; and

stitching the first gas density image and the second gas density image together.

3. The method of claim 1 , wherein calculating the emission rate of the gas density image comprises:

determining a volume of the fugitive gas based on the second density image and a measured distance between the imaging device and the fugitive gas;

receiving wind measurement data, the wind measurement data including measured wind speed and direction of wind in the vicinity of the fugitive gas;

inputting the wind measurement data and the volume of the fugitive gas into a closed surface integral equation for calculating flux; and

receiving an output from the closed surface integral equation, the output being a calculated amount of the fugitive gas.

4. The method of claim 1 , wherein calculating the emission rate of the gas density image comprises:

creating a cross-section in the fugitive gas in the second gas density image;

dividing the cross-section into a plurality of subsections based on spacing between image pixels in the second gas density image, each of the plurality of subsections having an estimated length;

determining a concentration of pixels for each of the plurality of subsections;

determining a fugitive gas plume travel velocity orthogonal to the cross-section;

inputting the determined concentration of pixels for each of the plurality of subsections, the fugitive gas plume travel velocity, and a weighting function into an equation; and

receiving, as an output from the equation, a flux rate of the fugitive gas for the cross-section.

5. The method of claim 4 , wherein calculating the emission rate of the gas density image further comprises:

calculating the flux rate for additional cross-sections of the fugitive gas;

determining that total flux of the fugitive gas by calculating an average of the calculated flux rate for the cross-section and the additional cross-sections of the fugitive gas.

6. The method of claim 4 , wherein the estimated length of the plurality of subsections is determined by converting pixels to length using degrees of the imaging device's bearing and a measured length between the imaging device and the fugitive gas.

7. A non-transitory, computer-readable medium containing instructions that, when executed by a hardware-based processor, causes the processor to perform stages for determining an emission rate of a fugitive gas, the stages comprising:

receiving, from an imaging device, a first gas density image;

detecting the fugitive gas in the first gas density image;

delineating the fugitive gas in the first gas density image;

sending, to the imaging device, instructions for adjusting a bearing of the imaging device bearing to optimize a position of the fugitive gas in the imaging device's field of view;

sending, to the imaging device, instructions for capturing a second gas density image;

receiving the second gas density image from the imaging device;

calculating, based on the second gas density image, the emission rate of the fugitive gas;

prior to sending the instructions for capturing the second gas density image, determining that a percentage of the fugitive gas is present in less than a threshold percentage of a vertical field of view of the first gas density image; and

in response to the percentage of the fugitive gas being below the threshold percentage, sending, to the imaging device, instructions for modifying a zoom of the imaging device so that the fugitive gas is present in more than the threshold percentage of a vertical field of view of the imaging device.

8. The non-transitory, computer-readable medium of claim 7 , the stages further comprising:

prior to sending the instruction for capturing the second gas density image, determining that the second gas density image includes a first portion of the fugitive gas that does not include all of the fugitive gas;

sending instructions to the imaging device for capturing a third gas density image that includes a second portion of the fugitive gas that is horizontally adjacent the first portion of the fugitive gas;

receiving, from the imaging device, the third gas density image; and

stitching the first gas density image and the second gas density image together.

9. The non-transitory, computer-readable medium of claim 7 , wherein calculating the emission rate of the gas density image comprises:

determining a volume of the fugitive gas based on the second density image and a measured distance between the imaging device and the fugitive gas;

receiving wind measurement data, the wind measurement data including measured wind speed and direction of wind in the vicinity of the fugitive gas;

inputting the wind measurement data and the volume of the fugitive gas into a closed surface integral equation for calculating flux; and

receiving an output from the closed surface integral equation, the output being a calculated amount of the fugitive gas.

10. The non-transitory, computer-readable medium of claim 7 , wherein calculating the emission rate of the gas density image comprises:

creating a cross-section in the fugitive gas in the second gas density image;

dividing the cross-section into a plurality of subsections based on spacing between image pixels in the second gas density image, each of the plurality of subsections having an estimated length;

determining a concentration of pixels for each of the plurality of subsections;

determining a fugitive gas plume travel velocity orthogonal to the cross-section;

inputting the determined concentration of pixels for each of the plurality of subsections, the fugitive gas plume travel velocity, and a weighting function into an equation; and

receiving, as an output from the equation, a flux rate of the fugitive gas for the cross-section.

11. The non-transitory, computer-readable medium of claim 10 , wherein calculating the emission rate of the gas density image further comprises:

calculating the flux rate for additional cross-sections of the fugitive gas;

determining that total flux of the fugitive gas by calculating an average of the calculated flux rate for the cross-section and the additional cross-sections of the fugitive gas.

12. The non-transitory, computer-readable medium of claim 10 , wherein the estimated length of the plurality of subsections is determined by converting pixels to length using degrees of the imaging device's bearing and a measured length between the imaging device and the fugitive gas.

13. A system for determining an emission rate of a fugitive gas, comprising:

an imaging device;

a memory storage including a non-transitory, computer-readable medium comprising instructions; and

a hardware-based processor that executes the instructions to carry out stages comprising:

receiving, from the imaging device, a first gas density image;

detecting the fugitive gas in the first gas density image;

delineating the fugitive gas in the first gas density image;

sending, to the imaging device, instructions for adjusting a bearing of the imaging device bearing to optimize a position of the fugitive gas in the imaging device's field of view;

sending, to the imaging device, instructions for capturing a second gas density image;

receiving the second gas density image from the imaging device;

calculating, based on the second gas density image, the emission rate of the fugitive gas;

prior to sending the instructions for capturing the second gas density image, determining that a percentage of the fugitive gas is present in less than a threshold percentage of a vertical field of view of the first gas density image; and

in response to the percentage of the fugitive gas being below the threshold percentage, sending, to the imaging device, instructions for modifying a zoom of the imaging device so that the fugitive gas is present in more than the threshold percentage of a vertical field of view of the imaging device.

14. The system of claim 13 , the stages further comprising:

prior to sending the instruction for capturing the second gas density image, determining that the second gas density image includes a first portion of the fugitive gas that does not include all of the fugitive gas;

sending instructions to the imaging device for capturing a third gas density image that includes a second portion of the fugitive gas that is horizontally adjacent the first portion of the fugitive gas;

receiving, from the imaging device, the third gas density image; and

stitching the first gas density image and the second gas density image together.

15. The system of claim 13 , wherein calculating the emission rate of the gas density image comprises:

determining a volume of the fugitive gas based on the second density image and a measured distance between the imaging device and the fugitive gas;

receiving wind measurement data, the wind measurement data including measured wind speed and direction of wind in the vicinity of the fugitive gas;

inputting the wind measurement data and the volume of the fugitive gas into a closed surface integral equation for calculating flux; and

receiving an output from the closed surface integral equation, the output being a calculated amount of the fugitive gas.

16. The system of claim 13 , wherein calculating the emission rate of the gas density image comprises:

creating a cross-section in the fugitive gas in the second gas density image;

dividing the cross-section into a plurality of subsections based on spacing between image pixels in the second gas density image, each of the plurality of subsections having an estimated length;

determining a concentration of pixels for each of the plurality of subsections;

determining a fugitive gas plume travel velocity orthogonal to the cross-section;

inputting the determined concentration of pixels for each of the plurality of subsections, the fugitive gas plume travel velocity, and a weighting function into an equation; and

receiving, as an output from the equation, a flux rate of the fugitive gas for the cross-section.

17. The system of claim 16 , wherein calculating the emission rate of the gas density image further comprises:

calculating the flux rate for additional cross-sections of the fugitive gas; and

determining that total flux of the fugitive gas by calculating an average of the calculated flux rate for the cross-section and the additional cross-sections of the fugitive gas.

Assignments (1)

Continuity (2)

References Cited (105)