A study of methane emissions from orphan wells in Louisiana
- 1Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA.
- 2Department of Oceanography & Coastal Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA; (Now at the) School of Ocean Science and Engineering, University of Southern Mississippi, Ocean Springs, MS 39564, USA.
- 3Department of Experimental Statistics, Louisiana State University, Baton Rouge, LA, 70803, USA.
- 4Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA; Department of Economics, Louisiana State University, Baton Rouge, LA, 70803, USA.
- 0Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA.
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View abstract on PubMed
Summary
This summary is machine-generated.Methane emissions from Louisiana
Area Of Science
- Environmental Science
- Geoscience
- Petroleum Engineering
Background
- Orphan oil and gas wells pose environmental risks, including methane emissions.
- The Louisiana Department of Energy and Natural Resources (LA DENR) implements well plugging and abandonment (P&A) programs.
- Quantifying methane emissions from these wells is crucial for environmental management.
Purpose Of The Study
- To analyze methane emissions from orphan oil and gas wells in Louisiana.
- To assess the impact of various well and reservoir attributes on methane emission occurrence and magnitude.
- To identify key factors influencing methane leakage from plugged wells.
Main Methods
- Analysis of 600 well measurements from well-heads.
- Statistical analysis including trend analysis, Chi-Square tests, Kruskal-Wallis tests, and analysis of covariance.
- Compilation and analysis of well attributes: field, fluid type, age, depth, density, uncemented interval, reservoir pressure, production history, and borehole characteristics.
Main Results
- Identified uncemented interval length, well age, time since production shut-down, borehole size, and perforation interval length as associated with methane emission occurrence and leak rate intensity.
- Found that newer wells exhibit higher emission occurrence and greater magnitudes.
- Analysis of covariance indicated an interaction between location and well density, supporting the significance of well age.
Conclusions
- Specific well attributes significantly influence methane emissions from orphan wells.
- Well age is a critical factor, with newer wells showing increased emissions.
- Further research with larger datasets is recommended for more definitive conclusions on methane emissions from P&A wells.
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