Two-phase pressure test analysis
A theoretical basis is given for well test analysis of solution-gas and gas-condensate reservoirs in the infinite-acting period. The study is limited to radial flow with a fully penetrating well in the center of the drainage area. Porosity and absolute permeability are constants and gravitational and capillary effects are neglected. The tests are conducted at constant surface rate. An analytical expression for the pressure - saturation relationship is derived from the time-dependent gas- and oil-flow equations. This relationship can be used at the wellbore to generate pseudopressure functions for drawdown and buildup that allow test interpretation using the liquid analogy. Theoretical developments are examplified by simulated drawdown and buildup tests in a solution-gas drive reservoir. 7 refs.
- Research Organization:
- Rogaland Res Inst
- OSTI ID:
- 6354149
- Report Number(s):
- CONF-811023-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States); ISSN SEAPA
- Country of Publication:
- United States
- Language:
- English
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