Quantitative tracing of natural gas origins in shale systems using intramolecular isotopic compositions of propane: A case study from a Paleozoic gas reservoir, Ordos Basin, China

Key Points

• Natural gas origins are traced using intramolecular isotopic compositions, contributing valuable insights into shale systems.
• The study analyzes propane isotopic compositions from the Paleozoic gas reservoir in the Ordos Basin, showing distinct origins.
• Quantitative tracing involves assessing isotopic variations to classify methane sources with precision and reliability.
• Findings support enhanced methods for understanding the complex processes of natural gas formation in geological formations.