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Analysis and Design of Field Tracers for Reservoir Description

出版	University of Texas at Austin, 1988
URL	http://books.google.com.hk/books?id=eS6otwAACAAJ&hl=&source=gbs_api

註釋A large-scale multiple well, multiple tracer project has been successfully simulated using UTCHEM, a comprehensive three-dimensional chemical flood compositional simulator developed at the University of Texas. These simulations are not only the largest and most complex field tracer simulations to date using UTCHEM, but are also larger than any similar work reported in the literature. Several of the modelling capabilities of UTCHEM were taken full advantage of in the course of this study including many factors, such as transverse dispersion, variable well rates, areal permeability variation, and mobile oil, which cannot be handled by streamline models commonly used to model field-wide tracer flow. This study illustrates the potential of accurate reservoir simulation to be used as a tool to incorporate various field data for reservoir description purposes. This was a highly successful use of UTCHEM for this purpose which, although it relied most heavily on interwell tracer data, also made use of core and log data and opens the door for more completely integrated efforts along these lines. A field-scale sensitivity study was performed using a two-well section of the multiple well tracer project. The effects of variations in reservoir and tracer parameters on produced tracer concentration histories were examined, some of which were quantified for the purpose of determining the amount of tracer to inject in a reservoir. Simulations were made at several different stages of waterflooding with water tracers and partitioning tracers injected simultaneously in the same well to see if oil saturations in the reservoir can be determined accurately from interwell tracers. A series of runs was made to study some important tracer design considerations such as how many tracers to inject, where they should be injected, and how many producers should be sampled in order to gain as much information as possible from the results of an interwell tracer test. All of these aspects, taken together, clearly demonstrate the advantages and practicality of the use of a simulator such as UTCHEM, based upon accurate, higher order finite differences and extremely fast vector processing, to do field scale interwell tracer analysis quantitatively. This approach should now be firmly established as a major new tool. Obviously, the additional power and versatility of this approach can be used to extract far more complete information from interwell tracers than the traditional tools used and yet its full potential has certainly not been realized. The most striking examples of additional potential lie in the areas of reservoir characterization and petrophysics and should be rapidly developed