General Inflow Performance Relations for Solution - gas Drive Wells

摘要

The physical properties of fluid and phase - permeability vary with pressures for solution - gas drive reservoirs. The relationship between production rates and bottom hole flowing pressures is non - linear. Based on the data of different fluid properties and relative permeability, Vogel established a general inflow performance relation for perfect wells in solution - gas drive reservoirs. Standing introduced a concept of flow efficiency and combined with the Vogel equation to predict the inflow performance of damaged or improved wells. This method will bring about incorrect results. Camacho corrected the concept of flow efficiency, but did not clear the physical meaning of the definition. This study defines the flow efficiency as the ratio of actual to ideal production rate under the same flowing pressure. The definition has a clear physical meaning and is easy to describe in mathematical models. Inflow performance relationships established here are suitable for all situations and can be used extensively in practice.