Methane in Soil Gas and Its Migration to the Atmosphere in the Dawanqi Oilfield, Tarim Basin, China

Figure 2

Schematized picture of oil and gas migration in the Dawanqi oilfield, based on Yang et al. (2006). (1) Fault and fracture systems, (2) main direction of oil and gas migration, and (3) boundary of geological formations: Q: Quaternary (sandstone, mudstone, and conglomerate); N1k: Neogene Kangcun formation (sandstone, mudstone, and siltstone); N1j: Neogene Jidike formation (sandstone and mudstone); T-J: Triassic and Jurassic coal-bearing formation.