Suphan-Buri Basin, U-Thong Field is the studied area to improve oil recovery
by waterfooding. It is constructed as hypothetical model while its geological,
petrophysical and production data are based on the data from this field. This reservoir
model is used to analyze characteristic and behaviors of reservoir process that cannot
be easily observed. Additionally, the study and experiment work will be scoped in the
existing oil field (U-Thong field) and in the laboratory. The rock samples are
collected from outcrop in coal mines which are represented in Tertiary sandstone due
to out crops of Tertiary sandstone in central part of Thailand are rarely found.