| In order to characterize the complex, heterogeneous, multi-layered hydrocarbon reservoirs, and to gain a better understanding of fluid flow profiles in this reservoir, a thorough study of analytical and theoretical models of tracer flow in porous media was conducted.;A computer program originally developed by Abbaszadeh and Brigham (1983), was acquired to facilitate this investigation. This program is based on analytical models to design and analyze interwell tracer tests data. By enhancing the Abbaszadeh and Brigham program, a computer code--TRACER, was developed to analyze different patterns of heterogeneous reservoirs. This computer code utilizes a non-linear least-squares technique as an optimization technique to minimize the difference between the observed tracer data from the field and calculated value and generates an optimum match for a given number of layers. The model assumes piston-like displacement, unit mobility ratio, uniform saturation layers, constant dispersion coefficient for all layers, no cross flow, and no gravity or capillary effects. Field data for the thermal oil recovery technique for the Fault Block II portion of the Wilmington reservoir was used in this study to demonstrate the capability of the enhanced code. |
