What Does
Conventional Gas Mean?
Conventional gas is natural gas that can be extracted from the earth through naturally occurring pressure and pumping operations that allow the gas to readily flow into wellbores.
Over time, the well will decrease in production at which time artificial lift methods have to be used to increase production. When more intensive methods have to be adopted to increase production, then it is classified as unconventional gas.
Conventional gas is about 90% methane with the remaining consisting of ethane, propane, butane and other hydrocarbons.
Trenchlesspedia Explains Conventional Gas
Conventional gas reservoirs consist of gas stored at high pressure in mostly porous sandstone formations capped with an impermeable rock.
Conventional gas production has four phases, namely:
- Exploration
- Drilling
- Pumping
- Abandoning
Geologists use technology to predict the location and extent of underground oil reservoirs after which a drilling rig is used to bore a hole from the surface to the oil reservoir.
Piping is inserted into the reservoir from which some of the oil will be produced from the natural pressure in the reservoir. When the pressure decreases, the pump is used to remove the remaining oil.
When the well becomes non-productive, the well is filled with cement to prevent the escape of hydrocarbons, and a special cap is placed over it.