Methane Emissions from Process Equipment at Natural Gas Production Sites in the United States: Liquid Unloadings


graphic of a tab thats labeled Liquid Unloadings graphic of a tab labeled Pneumatic Controllers

FREQUENTLY ASKED QUESTIONS

Frequently asked questions are organized into sections addressing (i) methods and results, (ii) comparing this work to other studies, and (iii) interpreting the results.

View or print the entire document

  Methods and Results

  What is a liquid unloading?
  [+] Answer
     
  Do all natural gas wells have liquid unloadings that result in emissions?
  [+] Answer
     
  Why was the study done and what is unique about the methods used and data reported in this study?
  [+] Answer
     
  What types of emission sources were measured and what is the difference between wells with and without plunger lifts?
  [+] Answer
     
  How were sites selected for sampling? What steps were taken to eliminate bias in the sites sampled?
  [+] Answer
     
  Are the raw data publicly available? Are any data not being released?
  [+] Answer
     
  Why focus only on methane?
  [+] Answer
     
  Why make measurements in different regions and why would emissions vary from geologic basin to basin?
  [+] Answer
     
  Comparing this work to other studies

  How do these results compare to emissions reported by the U.S Environmental Protection Agency?
  [+] Answer
     
  How do these results compare to emissions reported by Allen et al. (2013; PNAS, 110, 17768-17773)?
  [+] Answer
     
  Interpreting the Results

  How did the study team use its measurements to estimate national emissions?
  [+] Answer
     
  Do these new findings change the overall emission rate, expressed as a percentage of natural gas production, reported by Allen et al. (2013; PNAS, 110, 17768-17773)?
  [+] Answer