Abstract:

The data of well-test pressure could be used to describe reservoir heterogeneity. Whenderivative curves bend downward in middle stage, the storage coefficient of the reservoir increases; on the contrary, the storage coefficient decreases. When the derivative curves stepup or step down from horizon, the flow coeficient of the reservoir also decreases or increases,and the obliqueness of the straight part of radial flow on Horner on.rve would become biggeror smaller accordingly. Several examples in Tarim basin have proved this.