Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. Gas as it is produced from the reservoir. Raw gas may contain methane, heavier hydrocarbons and other nonhydrocarbon gasses such as CO2, H2S, nitrogen or helium.
Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. In the context of reactions, wet gloss heating value is the total energy transferred as heat in an ideal combustion reaction of a water saturated gas at a standard temperature and pressure in which all water formed appears as a liquid.
A relief system is an emergency system for discharging gas during abnormal conditions, by manual or controlled means or by an automatic pressure relief valve from a pressurized vessel or piping system, to the atmosphere to relieve pressures in excess of the maximum allowable working pressure (MAWP). A scrubbing vessel should be provided for liquid separation if liquid hydrocarbons are anticipated. The relief-system outlet may be either vented or flared. If designed properly, vent or flare emergency-relief systems from pressure vessels may be combined. Some facilities include systems for depressuring pressure vessels in the event of an emergency shutdown. The depressuring-system control valves may be arranged to discharge into the vent, flare, or relief systems.
Table 1 shows the gas-field-size requirements and typical world-scale plant sizes for some of the gas utilization options. The gas-field-size requirements are based on a single-train plant with a 20-year life. A combination of different gas monetization options also can be used depending on the available gas reserves. Table 2 compares the total market size for the different products for year 2001. Figure 1 depicts the impact of an additional 1,000 MMscf/D of gas on the product market.
Natural gas is the feedstock used in most of the world's production of methanol. Methanol is a primary liquid petrochemical made from renewable and nonrenewable fossil fuels containing carbon and hydrogen. Containing one carbon atom, methanol is the simplest alcohol. It is a colorless, tasteless liquid and is commonly known as "wood alcohol." Stranded gas can be monetized by producing chemical (or fuel grade) methanol and transporting it to the market.