A Multi-Layer Multi-Region Well Test Model
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2015 by IJETT Journal|
|Year of Publication : 2015|
|Authors : Ashkan Jahanbani G. , Tom A. Jelmert
|DOI : 10.14445/22315381/IJETT-V19P227|
Ashkan Jahanbani G , Tom A. Jelmert "A Multi-Layer Multi-Region Well Test Model", International Journal of Engineering Trends and Technology (IJETT), V19(3), 154-158 Jan 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Pressure data of composite reservoirs are usually analyzed using two-region models separated by a vertical front. This simplification may lead to significant errors in the estimates. In this paper, a multi-region composite model with thin skin at the fronts is improved by adding n layers in the vertical direction to model the effect of gravity. The proposed model is then compared to the recently developed models for thermal well test analysis. The proposed model consists of m regions to model the smooth variation of properties from the inner to the outer region while the composite models used for the comparison assume an intermediate region characterized by power-law decline of properties. Fronts are assumed tilted due to the gravity effects by use of multi-layer reservoir concept with no cross-flow between the layers. The model can be validated against conventional models. Addition of more intermediate regions and skin at front locations are investigated to achieve a better match with the new analytical models. The model developed in this work can be used in type curve matching for improved well test analysis.
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composite reservoir, gravity, multi-layer, multi-region, smooth property variation, well test