... in and around the fractures. These flow regimes generally cannot be defined very well based on the test data. Moreover, many factors, such as vertical permeability or the vertical anisotropy, inclination angle from the vertical direction, the spacing between fractures, and the penetration ratio (the ratio...

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... will not show up for practical purposes. The solutions during the infinite-acting flow period are, for the different values of penetration ratio and a given value of h fD , characterized by a single envelope curve in the log-log graph previously mentioned. The time for the start of the pseudoradial flow...