Abstract This paper discusses a completion scheme currently being applied in a thick, large, elongated carbonate anticline Middle-East oil reservoir. The new well completion calls for a combination of an open hole horizontal section penetrating the top 10 feet of the reservoir and a cased or un-disturbed vertical segment through a thick formation. The horizontal section will be used for producing and the vertical segment will be used for monitoring purposes (Figure-1). The cased vertical segment will allow undisturbed monitoring of the sweep in the area below the horizontal section, especially in areas of high heterogeneity. The horizontal application proved to be useful both in terms of economics and sweep with supported reservoir simulation results and some actual field data performance. Pilot wells have been drilled and completed and early assessment has been encouraging. P. 123