The definition of volumetric original gas in place (OGIP) at well-to-field scale is an outcome of the Hugoton cellular model and one of the main objectives of HAMP. OGIP is both a tool for reservoir management and for evaluating whether the static model accurately represents the reservoir system. Comparing volumetric OGIP with remaining gas in place (RGIP) at well, multi-well, to more regional ...

gas reservoirs with low permeability (k

A review of field production data reveals that usually, it is very difficult to apply available decline models because of poor quality and often noisy character of initial data and also unrealistic assumptions of the models. This paper tries to introduce applicable procedures to correct initial data and reproduce missed data. Corrected data are analyzed and finally, the results for permeability...

Gas reservoirs with low permeability (k<0.1 mD) are among the unconventional reservoirs and are commonly termed as "Tight Gas Reservoirs". In conventional gas reservoirs that have high permeability, the flow of gas is basically controlled by the reservoir permeability and it is calculated using the Darcy equation. In these reservoirs, gas flow due to gas diffusion is ignored compared to Dar...