Well testing using multiple simultaneous pressure measurements

摘要

Pressure measurements are taken simultaneously in two isolated wellbore regions 58, 203 that are in communication with a common formation. Preferably, fluids are produced in the first region which may be defined by two packers 202,204. The regions may be in the same wellbore or in separate wellbores (figure 10) and may be moved along the well to gather data in different positions. The measurements are used to determine properties (figure 2) such as permeability of the formation and of any alteration skin formed by interaction of the formation with drilling fluids, preferably via an iterative forward model (figure 5). Production in the first region may be stimulated by perforating and the injection of acid. Measurements taken by pressure sensors 70, 72 may be stored downhole or transmitted to the surface by a telemetry system.