| Title | Effect of Carbon Dioxide on PVT Behavior of Water below 150°C |
|---|---|
| Authors | Parlaktuna, Mahmut; Okandan, Ender |
| Year | 1988 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Brine Technology; Reservoir Engineering; Carbon Dioxide; Dissolved Gas; Noncondensable Gas; Boiling Point; Pressures; Brines; Multi Phase; Single Phase; Two Phase; Steam Fraction; Temperature; Middle East Technical University |
| Abstract | Natural hydrothermal systems usually contain appreciable concentrations of noncondensable gases, especially carbon dioxide. Presence of CO2 causes the transition between single phase and two phase flow to happen deeper in the wellbore than one would expect when CO2 is ignored. PVT experiments for water carbon dioxide binary system were conducted with carbon dioxide concentrations of 0.30, 1.36, 1.97 and 2.26% by weight at three different temperatures namely 103, 123,, and 146°C and the flashing pressure of the system was observed to see the increase with the increase of carbon dioxide concentration and/or temperature, as expected. An empirical equation was derived for the partial pressure of carbon dioxide as a function of temperature and carbon dioxide concentration in liquid phase for temperature interval of 103-146°C. Compressibility's of water carbon dioxide binary system were calculated and compared with the compressibility of pore water and carbon dioxide. |