2025 Publications

9 May – Performance of mobile survey solutions for natural gas pipeline leaks under different soil type and moisture conditions

G. Venkata Rao, Richard S. Kolodziej IV, Daniel J. Zimmerle, Kathleen M. Smits

25 March – Design, Build, and Initial Testing of a Portable Methane Measurement Platform

Stuart N. Riddick, John C. Riddick, Elijah Kiplimo, Bryan Rainwater, Mercy Mbua , Fancy Cheptonui, Kate Laughery, Ezra Levin, and Daniel J. Zimmerle

18 March – Integrating Technical Economic and Management Requirements for Successful Measurement Informed Inventory: A Case Study

Jenna Brown, Dan Zimmerle

04 March – Automated Recognition of Oil and Gas Production Infrastructure Using Satellite Imagery *

Sonu Dileep, Nathaniel Blanchard, Daniel Zimmerle

01 January – Performance of survey solutions under single-blind controlled testing protocol. *

Chiemezie Ilonze, Rachel Day, Ethan Emerson, Aidan Duggan, Ryan Brouwer, Dan Zimmerle

2024 Publications

23 December – Using Prototypical Oil and Gas Sites to Model Methane Emissions in Colorado’s Denver-Julesburg Basin Using Mechanistic Emission Estimation Tool

Winrose Mollel, Daniel Zimmerle, Arthur Santos, Anna Hodshire

10 December – Using Measurement-Informed Inventory to Assess Emissions in the Denver-Julesburg Basin *

Arthur Santos, Winrose Mollel, Jerry Duggan, Anna Hodshire, Prajay Vora, Daniel Zimmerle

13 Nov 2024 – Evaluating the accuracy of downwind methods for quantifying point source emissions *

Mercy Mbua, Stuart N. Riddick, Elijah Kiplimo, and Daniel Zimmerle

31 October –Addressing Low-Cost Methane Sensor Calibration Shortcomings with Machine Learning

Elijah Kiplimo, Stuart N. Riddick, Mercy Mbua, Aashish Upreti, Abhinav Anand, and Daniel J. Zimmerle

5 August – Estimating Total Methane Emissions from the Denver-Julesburg Basin Using Bottom-Up Approaches

Stuart N. Riddick, Mercy Mbua, Abhinav Anand, Elijah Kiplimo, Arthur Santos, Aashish Upreti, and Daniel J. Zimmerle

18 July – Reconciliation of Ground and Airborne Measurements of Methane Emissions from Oil and Gas Production

Jeffrey Nivitanont, Kristen Pozsonyi, Tim Vaughn, Arthur Barbaro dos Santos, Stuart Riddick, Shane Murphy, Daniel Zimmerle

12 June – Assessing the Progress of the Performance of Continuous Monitoring Solutions under a Single-Blind Controlled Testing Protocol

Chiemezie Ilonze, Ethan Emerson, Aidan Duggan, and Daniel Zimmerle

9 May – Flow and Transport of Methane from Leaking Underground Pipelines: Effects of Soil Surface Conditions and Implications for Natural Gas Leak Classification

J R R Navodi Jayarathne, Daniel Zimmerle, Richard S Kolodziej, Stuart Riddick, Kathleen M Smits

19 April – Flow and Transport of Methane from Leaking Underground Pipelines: Effects of Soil Surface Conditions and Implications for Natural Gas Leak Classification.

Jayarathne, J. R. R. N., Kolodziej IV, R. S., Riddick, S. N., Zimmerle, D. J. and Smits, K. M.

12 April – Comparison of Sub-Ppm Instrument Response Suggests Higher Detection Limits Could Be Used to Quantify Methane Emissions from Oil and Gas Infrastructure

Stuart N. Riddick, Mercy Mbua, Ryan Brouwer, Ethan W. Emerson, Abhinav Anand, Elijah Kiplimo, Seunfunmi Ojomu, Jui-Hsiang Lo and Daniel J. Zimmerle

10 April  – Point Sensor Networks Struggle to Detect and Quantify Short Controlled Releases at Oil and Gas Sites

Rachel Elizabeth Day, Ethan Emerson, Clay Bell, Daniel Zimmerle

3 April  – Evaluating Development of Empirical Estimates Using Two Top-Down Methods at Midstream Natural Gas Facilities

Jenna A. Brown, Matthew R. Harrison, Tecle Rufael, Selina A. Roman-White, Gregory B. Ross, Fiji C. George, and Daniel Zimmerle

29 February – Methane Emissions from Abandoned Oil and Gas Wells in Colorado.

Riddick, S. N., Mbua, M., Santos, A., Emerson, E. W., Cheptonui, F., Houlihan, C., Hodshire, A. L., Anand, A., Hartzell, W.  and Zimmerle, D. J.

5 February  – Potential Underestimate in Reported Bottom-up Methane Emissions from Oil and Gas Operations in the Delaware Basin

Riddick, S.N.; Mbua, M.; Santos, A.; Hartzell, W.; Zimmerle, D.J. * denotes pre-print publication

METEC Research Publications

2023 and earlier