| The variation in the composition with the depth in hydrocarbon reservoirs has been observed by technologists in oil industry. This variation, in several cases, was a result of gravity forces. The concentration of the lighter components tend to be more towards the top of the reservoir and the concentration of the heavier components tend to be more towards the bottom of the reservoir. Several authors suggested some algorithms to predict this variation. These algorithms were used as a tool to investigate reservoir continuity and determine the gas-oil contact (GOC) depth.; In this study, the technique of compositional gradient calculations is used in a real field data for one of the Saudi gas-condensate reservoirs to address the reservoir continuity and investigate the possibility of having a GOC in the reservoir. The study showed that the reservoir is not continuous and there is no GOC in the reservoir. Also the results were supported by reservoir geology 3-D seismic that showed faults in the area of interest. The findings of this study are essential for the development of such reservoir since a gas-cycling project will be needed to maximize the condensate recovery. |
