WAG injection to reduce capillary entrapment in small-scale heterogeneities
Conference
·
OSTI ID:468170
We present an experimental study of water-alternate-gas (WAG) injection, or more accurately simultaneous water and gas injection (SWAG) as a means to reduce the capillary entrapment of oil in small (centimeter) scale reservoir heterogeneities. We describe the physical principle of the displacement method, which we illustrate with simulation results. In the experimental study, we compare the displacement efficiency of water injection and SWAG injection in scaled models with heterogeneity in wettability and grain size distribution. In these experiments, the average WAG recovery was twice as high as the water flood recovery.
- OSTI ID:
- 468170
- Report Number(s):
- CONF-961003--
- Country of Publication:
- United States
- Language:
- English
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