This training is designed for reservoir engineers and geoscientists involved in the evaluation and management of naturally fractured reservoirs. In particular, it is intended for energy professionals who perform activities related to understanding fractured reservoir behavior and who use numerical simulation models for history matching and prediction. Several methods exist for modeling naturally fractured reservoir dynamic behavior. The method used depends on the objective of the numerical simulation. The dual porosity concept is commonly used in hydrology and the oil and gas industry to represent flow in fractured media. In this training, you will learn about the background, concepts, and assumptions of the dual porosity model for simulating a naturally fractured reservoir. The principles of fracture modeling encourage a multi-disciplinary collaborative approach when you model and simulate fractured reservoirs. The training will begin by introducing the fundamentals of fractured reservoirs to establish a baseline of basic information and terminologies. We will then discuss the oil recovery mechanisms unique to fractured reservoirs such as viscous displacement, spontaneous imbibition, and gravity drainage. We will close by exploring the critical interactions between fractures and rock during gas or water injection is critical when you estimate recoveries. Throughout this class, simple element models will be used to demonstrate key concepts that can then be implemented with different software packages.