An Analysis of Horizontal Wells Intercepted by Multiple Fractures

Summary A mathematical model is developed and used to discern the characteristic responses of a multiply-fractured horizontal-well. A systematic discussion of pressure behaviors is given. New interpretations and conclusions are provided. A simple, screening guide to evaluate the efficacy of this completion scheme is presented. The consequences of perforating selective sections after fracturing are examined. The pressure behaviors that are discussed in this work are used to analyze responses of a field test. This test was conducted on a medium-radius horizontal-well completed in a dolomite/anhydrite formation with a 1900′ horizontal section. Four distinct intervals were perforated and individually stimulated. Results from the analysis of the commingled test are presented in this work. The methodology outlined here should be useful to others. Practical guidelines are provided.