Geology

Biography

Biography: Jassim M Thabit

Abstract

Non symmetrical azimuthal resistivity survey was applied with three different types of electrode arrays: Wenner, Schlumberger and polar dipole-dipole in two sites near water well contaminated with hydrocarbon materials in Karbala governorate for delineating underground seepage of contaminated water. A subsurface plume of contaminated water was detected moving to northeast direction. It is found that all the used arrays show the ability to delineate the contaminated water plume but polar dipole-dipole array was the best to delineate the exact axis of that plume. Symmetrical azimuthal resistivity survey with Wenner electrode array was applied in four stations near contaminated well 8 in order to detect moving direction of contaminated water spill from the well. This technique gave good results in detecting spill direction where the major amount of spill moving from the well towards northwest direction, then the spill divided into two parts; major part moving to northeast direction and the second part moving to southwest. Azimuthal resistivity techniques can be successful in detecting contaminated water spill under proper conditions. Deep VES survey (maximum distance between current electrodes was 800 m) in four VES points was applied in order to study the deep hydrocarbon contaminant-bearing layer (layers) with respect to its depth and thickness in its actual deep position. It is found that VES technique is not effective to detect this hydrocarbon contaminant-bearing layer (layers) in its actual position at the surveyed area, whereas the boundary between Dibdibba and Injana formations and the depth to the upper boundary of Dammam formation were detected.