| 摘要 |
A method is disclosed of estimating a property of a hydrocarbon-bearing formation penetrated by at least one injection well through which fluid is injected into the formation and penetrated by at least one production well through which fluid is produced from the formation. The injection rates of fluid through the injection wells are periodically varied and measured at substantially regular time intervals and measurements are also made of the production rate of fluid produced through the production well. A series of production well response delays, &tgr;, are selected. A set of correlation coefficients between the injection rate for each injection well and the production rate as a function of &tgr; are determined. From each set of correlation coefficients, a time lag, &tgr;max, corresponding to the maximum correlation coefficient is determined. The &tgr;max is then used to characterize a formation property, such as channel volume, permeability, or transmissibility.
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