An Approach for Steam Propagation and Production Performance in SAGD and Solvent SAGD: Lab Experiment and Simulation

摘要

Steam Assisted Gravity Drainage (SAGD) is considered a successful EOR method for heavy oil and bitumen. A two-dimensional physical model is designed to conduct experiments in this study. The consistency of the experimental data obtained was tested. The designed model was instrumented with 15 temperature sensors at different locations aimed at capturing the temperature propagation with distance and time. The experimental consistency tests for stream propagation have helped in understanding the important controlling parameters for the experiments. Steam propagation was mapped to understand the various processes taking place for oil recovery from steam chamber size and shape. The recovery mechanism could, to some extent, be realised. A simulation approach has been developed to history-match the production, and is compared to the used approach in the literature. Numerical simulation of the effect of Solvent SAGD on EOR was investigated. The developed steam chamber by simulated Solvent SAGD, simulated and experimental SAGD, is addressed in the paper. The results present an excellent practical approach to obtaining a developed steam chamber and accordingly identifying mechanisms. The match quality of the history-matched experiment allows a good assessment for production forecast, with understanding and development of the process. The paper contributes to generating more in-depth understanding of heat propagation, chamber development, and the heat transfer mechanism of SAGD.