--> Abstract: An Evaluation of Geologically Based Inter-Well Permeability Modeling Techniques Using Outcrop Data and the 'ECLIPSE' Reservoir Simulator, by B. D. Lowden, J. J. M. Lewis, T. S. Daltaban, and J. S. Archer; #91004 (1991)
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An Evaluation of Geologically Based Inter-Well Previous HitPermeabilityNext Hit Modeling Techniques Using Outcrop Data and the 'ECLIPSE' Reservoir Simulator

LOWDEN, BEN D., JONATHAN J. M. LEWIS, T. SEZGIN DALTABAN, and JOHN S. ARCHER, Imperial College, London, U.K.

The prediction of inter-well scale geological (Previous HitpermeabilityNext Hit) variation remains a difficult problem. In this paper, an extensive Previous HitpermeabilityNext Hit data set from a shallow marine, clastic sand-body is used to evaluate the accuracy of various Previous HitpermeabilityNext Hit infill techniques.

The experiment used a Previous HitpermeabilityNext Hit dataset 500 m long and 5 m high. This two-dimensional Previous HitpermeabilityNext Hit section comes from a coarsening upwards, shallow marine sequence in which Previous HitpermeabilityNext Hit varies from less than 250 md at the base to over 5 darcies at the top. Over a thousand Previous HitpermeabilityNext Hit values were collected regularly over the unit using an electronic field minipermeameter. Directional core-plugs were taken along orthogonal axes relative to the bedding from a number of large sediment blocks in order to input Previous HitpermeabilityNext Hit anisotropy ratios into the numerical simulator model. Other reservoir variables, such as porosity, capillary pressure, mobility ratio, and hydrocarbon viscosity, were kept constant.

A water flood simulation was performed based on one injector well and one producer well, each placed at opposite ends of the dataset. The results from the simulation of the original dataset were then compared with the results from the simulation of a number of Previous HitpermeabilityNext Hit patterns produced by routine Previous HitpermeabilityNext Hit infill techniques. The results indicate that many of the techniques widely used in industry produce quite different predictions of hydrocarbon recovery and water breakthrough, though it is encouraging that some techniques are far better than others at approaching the true Previous HitpermeabilityTop pattern and predicting the true reservoir performance.

 

AAPG Search and Discovery Article #91004 © 1991 AAPG Annual Convention Dallas, Texas, April 7-10, 1991 (2009)