抄録
This paper describes a quasi-two-dimensional numerical model for simulating production performance in the Mobara type water-dissolved natural gas reservoir. The model describes two-phase unsteady flow of gas and water in the reservoir, which is composed of horizontal beds of alternating mudstones and sandstones, assuming that flow of water and gas is taking place vertically (i.e. in one dimension only) in the mudstone and radially in the sandstone.
The numerical model is applied to study the effect of initial gas saturation and the relative permeabilities to gas and water in the mudstone on the performance of production gas-water ratio and bottom-hole pressure. It is concluded that the initial gas saturation and relative permeabilities have a major effect on these performances.
The results of simulation for production performance in the gas field of the Sencho district show general agreement between the calculated and measured values.
