M-20 PERMANENT MONITORING OF A WATERFLOOD USING CEMENTED RESISTIVITY ARRAYS – INDIANA USA Introduction 1 In 1999 an oilfield experiment was conducted to test the application of electrical measurement technologies to permanent reservoir monitoring. The principal objective of the experiment was to demonstrate the feasibility of monitoring water movement between an injection and observation well. Experimental Configuration Two wells were drilled into the Mansfield sandstone reservoir in the Ashworth lease Indiana USA. The D-8 injector well was located in the center of four development wells. The OB-1 monitoring well was offset 71 m to the southwest in a location midway


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