Pressure and pressure derivative analysis for asymmetry finite-conductivity fractured vertical wells

espanolMany researchers have developed equations to characterize hydraulic fractures assuming they are symmetrical with respect to the well, since symmetrical fractures are less likely to occur. Therefore, since there is no direct analytical methodology that allows an adequate interpretation using the pressure derivative function to determine the fracture asymmetry, the position of the well with respect to the fracture, fracture conductivity and half-fracture length. For this reason, the TDS methodology that uses characteristic lines and points found in the pressure and derivative log-log graphs is presented here to develop analytical equations used to determine in a simple, practical and exact way the aforementioned parameters. The technique was satisfactorily verified with synthetic problems. EnglishMuchos investigadores han desarrollado ecuaciones para caracterizar fracturas hidraulicas asumiendo que estas son simetricas con respecto al pozo puesto que las fracturas simetricas son menos probable que ocurran. Por lo tanto, puesto que no existe una metodologia analitica directa que permita una adecuada interpretacion utilizando la derivada de presion para determinar la asimetria de la fractura, la posicion del pozo con respecto a la fractura, la conductividad de fractura y la longitud media de la misma. Por ello, aqui se presenta la metodologia TDS que utiliza lineas y puntos caracteristicos hallados en los graficos loglog de presion y derivada para desarrollar ecuaciones analiticas usadas para determinar en forma simple, practica y exacta los parametros anteriormente mencionados. La tecnica se verifico satisfactoriamente con problemas sinteticos.