No abstract

This report outlines progress in the first quarter of the extension of the DOE project "High Resolution Prediction of Gas Injection Process Performance for Heterogeneous Reservoirs". This report presents experimental results that demonstrate combined scaling effects of viscous, capillary, and gravity crossflow mechanisms that apply to the situations in which streamline models are used. * All other symbols are defined in the nomenclature section.

In this report we present an approach for accurate and consistent implementation of gravity effects in compositional streamline simulation.The approach is based on an operator-splitting technique, successfully applied in streamline simulation of black-oil models. The method is demonstrated to conserve mass. Its application adds only marginally to the overall CPU requirement. We provide a detailed description of the approach to incorporate gravity effects and demonstrate the efficiency of compositional streamline simulation, even for cases where gravity segregation plays an important role in the overall process performance.The new approach is demonstrated to be in excellent agreement with commercial FD simulators for prediction of flows in 2D vertical and multi-well 3D geometries. Finally, we outline the work required to extend the compositional streamline approach to handle three-phase flow modeling, also including gravity.iii

Speed-up factor and memory requirements of the nested gridding method for a pressure solve and for the whole simulation on the 30 example presented in the chapter. The numbers in parenthesis in the third column are speed-up factors for the case

This quarterly report outlines progress from