Abstract
The Kazusa formations in Minami Kanto gas field consist of sandstones and siltstones alternately. The fluids flow mechanism in this reservoir is similar to that in naturally fractured reservoirs.
A three-dimensional, two-phases double porosity model is applied for predicting the behavior of fluids in the sand/silt system. Using this model, we make simulation studies and verify theoretically the mechanism of fluids flow in the Mobara type gas field.
As a result of simulation studies, original gas in siltstones is larger than that in sandstones and gas saturation in siltsones sways production performance together with permeability of siltstones.
