Acoplamento explícito do reservatório, poço e equipamentos de superfície utilizando tabelas de fluxo

Abstract

The computational simulation of petroleum reservoirs is an extremely diverse field of study that is able to represent different parts of the production process. Considering the size of this industry and how it is always increasingly needed to obtain an efficient and lucrative process, the simulation is a valuable tool in predicting the production of reservoirs and their behaviors, allowing the evaluation of viability of production fields to be made even before they are installed. However, to achieve a more precise simulation, other factors need to be taken into consideration, not restricted to the petroleum reservoir. The tubing that receives the flux directly needs to be taken into account, in the case of this work, in the form of flow tables. The present work has the goal to offer a stable and trustworthy option to the coupling of reservoir, well and surface facilities using flow tables, from which there can be estimated the pressure drop for the tubing section. Implemented on the compositional simulator from The University of Texas at Austin, UTCOMPRS, the explicit coupling method utilizing the mentioned tables is characterized by a multidimensional linear interpolation that can encompass all the variables that compose them. Differently from simpler models, the “multilinear” interpolation was able to provide very satisfactory results when compared to a commercial simulator, then attesting its efficiency in this approach. With the bottom hole pressure value obtained through this technique, the reservoir simulator is able to account for the phenomena represented by the flow table in a direct manner and with low computational cost due to the linear nature of the interpolation equations.