GROUNDWATER MODELING OF THE BAZURGAN OIL FIELD AREA

Abstract

The hydraulic performance of the aquifer has been investigated thlough the use of a computer program package. The hydrogeological information which are required for aquifer simulation have been collected from various sources, evaluated, then used as an input data for the computer package. Due to the scarcity of "data, it has been a difficult task to delimit the location and type of the hydraulic boundaries along the northem and eastern sides of the area for modeling purpose. Accordingly, three cases are treated depending on the assumed nature of the boundaries. In the first all the boundaries are assumed at constant head. In the second, the northern and eastem boundaries are assumed to be of no flow type, whereas the Tigris river and AI- Musharah river both of which representing the west,rn and southern boundaries are treated as constant head. The third case is similar to the first; however the effect of Al- Teeb River and the marshes in the south are also taken into consideration. The steady- state natural head distribution prior to the effect of any external stresses irave been obtained by the steady- state treatment, and by the tursteady- state treatment for a very long simulation period. Both results gave nearly similar head clistribution which is comparable tairly well with measured head values. The steady- state head distribution is used as initial head values in the subsequent unsteady- state treatments. The drawdown distribution for the effect of existing wells, and proposed plans for future groundwater exploitation have been determined. It is found that the aquifer is capable to yield good quantities of water