DefinePK

Abstract

The use of non-Newtonian fluids is not new in the oil industry. Some of their qualities have been used as completion and stimulation fluids, fracturing operations and enhanced oil recovery projects. Besides, most heavy oils obey a non-Newtonian behavior. Therefore, it is important to have available a practical well test interpretation methodology for testing wells through which non-Newtonian fluids have been injected. Conventional analysis has been used for well test interpretation of injected non-Newtonian fluids. The main drawback of conventional analysis resides in properly identification of the points through which certain flow regime goes. This is not the case for the pressure derivative. Needless to say that an adequate analysis of these data will help obtaining a maximum oil recovery since it depends on a better reservoir characterization, then, a more practical and accurate methodology is required. Once the behavior of non-Newtonian injection fluids was obtained for different flow behavior indexes appropriate equations of the <i>TDS</i> technique were used along with conventional analysis for interpretation well test data. Both methodologies were used and successfully tested with synthetic and field examples.