Some features of technogenic soil layers and horizons in the zones of underground gas storages

Technogenic soils in underground gas storage areas are formed under the combined impact of natural and technogenic soil-forming factors (pipelining, gas well drilling and exploitation). New layers and horizons appear in the soil profiles. Technogenic layers (drilling technogenic layer (TSd), a chemically polluted loamy layer formed during the period of gas well drilling and exploitation; technogenic layer (TS^..), a periodically restoring chemically polluted sandy layer formed during the period of gas well exploitation); technogenic horizons (mixed drilling horizon (TURd), a natural-technogenic horizon formed during the drilling period because of mixing of natural soil material); and modification horizons (mixed organic horizon (TURAY), an organic horizon formed by soil restoration or organic matter transformation), were distinguished.