- Aboveground crossing
- Accident
- Aeration tank
- Aggressive (corrosive) water
- Air cooler
- Arctic pipelines
- Associated petroleum gas
- Back-stripping analysis
- Barbotage
- Barrage
- Barrel
- Bio-indication
- Bottomhole zone
- Box-and-pin joint (tool joint)
- Carbon black
- Casing string
- Catagenesis of organic substance
- Cavernosity
- Clogging
- Column equipment
- Comprehensive gas treatment unit
- Compressed natural gas filling stations
- Compressing
- Compressor station
- Condensate recovery factor
- Connector
- Core sample
- Correlation
- Corrosion
- Cratering
- Directional drilling
- Distillation-based separation of multi-component fluids
- Diversification
- Drilling
- Drilling (penetration) rate
- Drilling rig
- Dry gas
- Expander
- Extreme anhydrous depression
- Failure in gas industry
- Field development techniques
- Fishing tool
- Flammability limit
- Flare unit
- Fluid
- Fluid dynamics
- Flushing out of well
- Fore deep
- Formation
- Formation pressure
- Formation testing
- Fossil (stratum, reservoir, formation) water
- Free (non-associated) gas
- Free-piston pumping
- Fuel equivalent
- Gas absorption
- Gas adsorption
- Gas cap
- Gas condensate fields
- Gas consumption rate
- Gas deposit water cut
- Gas desorption
- Gas disposition terminal
- Gas distribution network
- Gas distribution plant (GDP)
- Gas engines
- Gas hydrates
- Gas hydrates self-conservation
- Gas interchangeability
- Gas jet ejector
- Gas linepipe
- Gas macrojamming
- Gas processing plant
- Gas separation
- Gas stripping
- Gas supply to consumers
- Gas throttling
- Gas tongue
- Gas transmission system
- Gas trunkline
- Gas-water contact (GWC)
- Gasholder
- Geological exploration risk
- Geological formation
- Geological prospecting
- Gravity exploration
- Greenhouse gases
- Helium
- Horizon
- Hydraulic fracturing
- Hydrocarbons
- Hydrogen index (pH)
- Hydrogenation
- Injection capacity of a well
- Kharasaveyskoye field
- Kovykta field
- Lateral coning
- Lift string
- Line pipe operation center
- Liquefied natural gas
- Lithology
- Logging
- Long-distance gas transmission
- Looping
- Low-temperature separation of gas
- Magnetic prospecting
- Main gas generation phase (MGGP)
- Main oil generation phase (MOGP)
- Medvezhye field
- Membrane technology
- Methane
- Methanol
- Mobile CNG station
- Mofettes
- Natural gas dew point
- Natural gas production
- Natural gas purification
- Natural gas vehicles (NGV)
- Natural pressure gas lift operation
- Natural reservoir
- Octane rating
- Odorant
- Offshore fields exploration
- Oil and gas formation
- Oil and gas reservoir
- Oil rim
- Oil-water contact (OWC)
- Oil/gas blowout
- Orenburg helium refinery
- Packer
- Pad distribution
- Passivization
- Phase
- Phase transitions of hydrocarbon gases
- Pipelaying vessel
- Pipeline accessories (valves and fittings)
- Pipeline route
- Pipeline watercourse
- Pipelines ballasting
- Plugging material (backfill)
- Preventer (blow-out equipment, BOE)
- Producing (pay) horizon
- Prospective resources
- Raw gas
- Reamer
- Regasification
- Repression funnel
- Reserves
- Reserves-to-Production Ratio (RPR)
- Reservoir depression
- Reservoir energy
- Reservoir gas of condensate accumulations
- Reservoir impermeable seal
- Reservoir temperature
- Retrograde phenomena
- Riser string
- Rock gas saturation
- Satellite soils monitoring
- Secondary (enhanced) recovery methods
- Seismic exploration
- Skin-effect
- Sorption
- Spot trading
- Stabilized condensate
- Standard conditions
- Stray currents
- Subsurface use licensing
- Swivel
- Synthesis gas
- Take-or-pay
- Tubing string
- Unified Gas Supply System
- Unstabilized condensate
- Viscosity
- Well
- Well cementing
- Well deviation
- Well recompletion
- Well stock
- Well suspension
- Wellhead pressure
- Western Siberia oil and gas bearing province
- Working gas
- Zapolyarnoye field
Retrograde phenomena – lithological body (bed, layer, stratum) capable of retaining fluids in reservoir and limiting a deposit in geological space. Fluid cutting-off properties depend on lithological profile and heterogeneity of the impermeable rock, on mineral composition of rock, void space structure, pressure differential in roof and bottom of impermeable seal, on capillary pressure of fluids, and on the impermeable rock thickness.
Many natural hydrocarbons multi-component systems have one retrograde area. For example, in formation fluids of gas condensate fields in most cases only retrograde condensation is observed. Retrograde phenomena are manifested in hydrocarbons multi-component systems of different compositions at different pressure and temperature values. It should be noted that pressure and temperature conditions resulting in retrograde phenomena in formation fluids of gas condensate and oil fields are often similar to pressure and temperature observed in field development practice. This causes fall-out of fluid components in gas-saturated reservoirs, changes in produced mix and in well productivity.