Pressure Transient Analysis Using the Pressure Derivative Method: Application to Some Wells in the Leyte Geothermal Power Project

Abstract

Pressure transient data obtainedhm geotkimal well testing has been generally analyzed using the standard techniques &rived f i m the oil and gas i&tiy. These tests include the usual pressure build up, diawdown, injection as well as pressure fall+$ The more defined or simpler co@gu&n of oil and gas fielh has also allowed development of a more recent detailed analysis called the pressure akrivative method for a better representation of the reservoir.

The pressure derivative methodpresents various characteristics of a reservoir that can in$uence the fluidflow in the well dwing pressure transient tests. It tackles the dgerent types of boundmies encountered as well as injkite-acting and dual porosity behaviors.

This paper discusses the application of the pressure derivative method to the welltest data of some of the The results obtained showed a more improved geothermal wells in the Lqte Geothermal Power Project. interpretation of wll test data and better understanding of the reservoir.