Abstract
The conventional way to analyse well test data is by a combination of type curve analysis and special analysis for specific flow periods. In many cases, these flow periods, radial, linear, spherical, etc., are identified by inspection of type curves. Once identified, the pressure versus some time function may be plotted as a straight line. Then, reservoir and well properties may be computed from the slope of the lien and its position in the coordinate system. In this work, we propose a new type curve based on derivatives with respect to the square-root of time. The resulting type curve is useful for identifying linear flow regimes. Linear flow periods may appear in many cases, for example: flow towards horizontal wells, vertically fractured wells, etc.
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