Desarrollo de una herramienta informática para el análisis e interpretación de pruebas de presión transitorias: desarrollo de una herramienta informática para la interpretación y análisis de pruebas de presión transitorias utilizando métodos convencionales.

Abstract

Currently, software is implemented as part of the methodology in education, thus optimizing manual processes. The present project of curricular integration presents the development of an academic software, for the analysis and interpretation of transient pressure tests. Through the most used conventional methods in the Oil and Gas Industry. For the development of the software, algorithms were designed based on the transient pressure testing theory, the procedures established for conventional methods and Matlab functionalities and applications. The main function used was polynomial curve fitting: “polyfit” and “polyval”, with the objective of delimiting the middle time region (MTR). And, consequently, its slope, extrapolated pressure (P*) and pressure measured at 1 hour. Then, the coding of the algorithms and execution was carried out in a script of the Matlab programming platform. The academic software allows the analysis and interpretation of three types of transient pressure tests: Build Up, Drawdown and Falloff - Test. With the objective of determining the parameters of interest to characterize and evaluate the reservoir. In the case of Build Up Tests, the Horner and MDH methods were used. For the Drawdown test, the MDH and limit test methods were used. And, the method of Merrill et al., was used for the injectivity tests. Finally, to validate the effectiveness of the software, the results obtained in the software were compared with those of a commercial software, using data from 5 transient pressure tests of Ecuador’s real wells and 2 proposed by Chaudhry (2004) and Lee et al. (2003). The relative error obtained in the 7 tests was less than 5%.