Experimental measurements of compressibility factors (Z-factors) for CO2-hydrocarbon mixtures at three specified temperatures and pressures from 50 to 5000 psia were presented. The results of experimental Z-factors were used to quantify economic benefits, such as EOR and enhanced condensate vaporization, of geologic storage of CO2 in gas reservoir. The major components of gas reservoir were identified as N2, CO2, methane, ethane, propane, n-butane, n-pentane, hexane, and heptane-plus. The laboratory measured Z-factor was much lower than hydrocarbon gas mixtures at the specified temperatures and pressures. That offered the opportunity to store larger surface volumes of CO2 than hydrocarbon gases. Five times the storage was possible depending on pressure, temperature, and hydrocarbon gas composition. Storage of CO2 increased of the CO2/HC gas mixture compressibility (Z-factor) was low. If a liquid condensate occupied the reservoir pore space and the addition of CO2 vaporized the liquid, additional pore space was acquired for CO2 storage. This is an abstract of a paper presented at the AIChE 2004 Annual Meeting (Austin, TX 11/7-12/2004).
|Original language||English (US)|
|State||Published - 2004|
|Event||2004 AIChE Annual Meeting - Austin, TX, United States|
Duration: Nov 7 2004 → Nov 12 2004
|Other||2004 AIChE Annual Meeting|
|Period||11/7/04 → 11/12/04|
ASJC Scopus subject areas