Technical Report NTB 88-21

A code to compute borehole fluid conductivity profiles with multiple feed points

It is of much current interest to determine the flow characteristics of fractures intersecting a wellbore in order to understand the hydrologic behavior of fractured rocks. Often inflow from these fractures into the wellbore is at very low rates. A new procedure (Tsang & Hufschmied 1988) has been proposed and a corresponding method of analysis developed to obtain fracture inflow parameters from a time sequence of electric conductivity logs of the borehole fluid.

The present report is a companion document to Tsang & Hufschmied (1988) giving the details of equations and computer code used to compute borehole fluid conductivity distributions. Verification of the code used and a listing of the code are also given.