Simulation of high water-cut in tight oil reservoirs during cyclic gas injection
Data from a pilot test imply substantial water production after gas injection, which may impede oil production, but the underlying mechanisms are poorly understood. A compositional model is developed to study possible mechanisms for high water-cut pilot results. First, eight pseudo-components were used to match the PVT lab results of a typical oil sample from the Wolfcamp shale. A lab-scale model was then established in our simulation study to match the results of gas huff-n-puff experiments in cores, in which key parameters were identified and tuned. A half-stage field model consisting of five ...
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