Investigation of Efficiency Improvements During CO2 Injection in Hydraulically and Naturally Fractured Reservoirs. Semi-annual Report, March 28, 2005-September 28, 2005.

摘要

This report describes the final work of the project, Investigating of Efficiency Improvements during CO2 Injection in Hydraulically and Naturally Fractured Reservoirs. The objective of this project is to perform unique laboratory experiments with artificial fractured cores (AFCs) and X-ray CT to examine the physical mechanisms of bypassing in HFR and NFR that eventually result in more efficient CO2 flooding in heterogeneous or fracture-dominated reservoirs. To achieve this objective, we divided the report into two chapters. The first chapter was to image and perform experimental investigation of transfer mechanisms during CO2 flooding in NFR and HFR using X-ray CT scanner. The second chapter deals with analysis and modeling the laboratory experiments and fluid flow through fractured networks. We derived a new equation to determine the average fracture aperture and the amount of each flow through fracture and matrix system. The results of this study were used as the observed data and for validating the simulation model.