Patent ID: 7281435
Filing Date: 2007-10-16
Classification: B09C,E21B,G01F

Abstract:
1. A tracer dilution method for measuring the flow rate of a non-aqueous phase liquid through a porous medium, comprising the steps of: placing a well or boring in the porous medium in the path of the flow of the liquid, whereby the liquid establishes a column within the well having a thickness; introducing a chosen quantity of a tracer into the well or boring, the tracer being soluble in the liquid and having a measurable quality related to the concentration of the tracer in the liquid; mixing the tracer with the liquid such that the resulting mixture is uniform; measuring the quality of the tracer as a function of time, thereby generating data characteristic the concentration of the tracer from which the flow of the liquid can be derived; correcting the data for the convergence of the liquid flow into the well or boring; and extracting the rate of flow of liquid from the corrected data.