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DETERMINATION OF HYDRAULIC CONDUCTIVITY AND POROSITY LOGS IN WELLS WITH A DISTURBED ANNULUS
Citation:
Taylor, K. AND F. Mulz. DETERMINATION OF HYDRAULIC CONDUCTIVITY AND POROSITY LOGS IN WELLS WITH A DISTURBED ANNULUS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/299.
Description:
A method is developed to determine the Hydraulic conductivity and porosity of the formation surrounding a well as a function of depth. n electrically anomalous fluid is injected into a fully screened well and the radius of invasion is determined by induction logging. he radius of invasion is determined at several times so that the rate of invasion and the hydraulic head required to inject the tracer, a hydraulic conductivity log can be calculated. orosity log can be obtained using Archie's rule and a del of formation electrical conductivity that accounts for the influence of the electrical conductivity of the formation matrix. he logs calculated by this method are insensitive to near-hole drilling disturbances. ield trials demonstrate that the results of the method agree well with other methods.