Journal of GeoEnergy, Journal Year: 2025, Volume and Issue: 2025(1)
Published: Jan. 1, 2025
Nonhydrocarbon gases are significant components of natural gas, and their concentration levels crucial factors affecting reservoir development value. While explorations have progressively moved from shallow to deep now ultradeep reservoirs, research on the geochemical characteristics nonhydrocarbon in such extreme depths remains limited, leaving origins types poorly understood. This paper analyzes (CO 2 , H S, N He, ) across major global basins determine origins. CO concentrations reach up ~40% but generally below ~15%. The increases with depth, primarily due inorganic origins, thermochemical sulfate reduction (TSR) magmatic being main causes. Depths mainly between 6000 7100 m. peak at ~26% ~6%. It originates crustal sources high‐temperature cracking sedimentary organic matter during postmature. ~1.6% ~0.2%. is concentrated 7800 m may a biological origin. He ~0.07% found 7700 fall well short commercial threshold (0.1%), indicating limited potential for enrichment reservoirs. S 46% 10%. slightly TSR processes. ~7600 Understanding these common varying patterns provide theoretical guidance future exploration targets like .
Language: Английский