Abstract
Reservoir pressure of condensate gas reservoir is an indispensable parameter for calculation of gas reserves, evaluation of gas-well productivity, dynamic analysis and assessment of retrograde condensation. The development of water-drive condensate gas reservoir is ranked among the most complex types of gas reservoir development. During the process of development, an accurate calculation and prediction of reservoir pressure is particularly difficult but important because reservoir pressure declines ceaselessly, condensate oil drops out continuously with an increase of the water-vapor content in condensate gas, and the edge water invades constantly. We tested the water-vapor content in condensate gas under different pressures by calculating the retrograde gas condensate, which is influenced by adsorption of porous media and capillary pressure. According to material balance principles, a novel material-balance equation for water-drive condensate gas reservoir was established in consideration of porous-medium absorption, capillary pressure and water vapor as well, and finally reservoir pressure at any time during production could be computed by iteration. Application results show that the reservoir pressure calculated with this method gets much closer to actual reservoir pressure, which virtually reduce the workload in field testing.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 278-283 |
| Number of pages | 6 |
| Journal | Shiyou Xuebao/Acta Petrolei Sinica |
| Volume | 33 |
| Issue number | 2 |
| State | Published - Mar 1 2012 |
| Externally published | Yes |
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- General Chemical Engineering
- Fuel Technology