Interpretation of interwell tracer tests using discrete fracture model

Well-to-well tracer tests are used for getting knowledge about the flow behavior in the reservoir. The results of interpretation of these tests are especially important when enhanced oil recovery techniques that use expensive fluids such as surfactants, micellar fluids, or polymers are modeled. The classical method of quantitative interpretation assumes that the tracer filtration channels are completely isolated from the formation. In this paper, an alternative method for interpreting the results of well-to-well tracer tests is proposed. High-permeability channels are represented as discrete fractures that connect producing and injection wells. A numerical solution of the convective transport equation is used for modeling the tracer flow. The flows between the fracture and the reservoir are fully resolved, so the above-described drawback of the classical technique is overcome. The interpretation is carried out by constructing a reservoir model and determining the model parameters by solving the inverse problem...