A modified cell-to-cell simulation model to determine the minimum miscibility pressure in tight/shale formations

نویسندگان

چکیده

A new oil–gas Minimum Miscibility Pressure (MMP) calculation algorithm is developed in this work based on the classic cell-to-cell simulation model. The proposed couples effects of capillary pressure and confinement original model to predict MMPs a confined space. Given that relies volume predictions reservoir fluids each cell, volume-translated Peng-Robinson Equation State (PR-EOS) applied for improved accuracy calculations fluids. robustness examined by performing MMP four systems. tie-line length extrapolation method used determine oil recovery factor calculated then validate results. First, achieve stable modeling results all examples, total cell number 500 determined examining variations as function number. Then, calculating near region, it found slightly lower than inflection point curve. Through case studies, temperature, pore radius, injection gas impurity are studied detail. It reduced space degree reduction depends radius. For tested radii, first increases decreases with an increasing temperature. Furthermore, compared pure carbon dioxide (CO 2 ) injection, addition methane (CH 4 nanopores. Therefore, recommended control content CH order more efficient design.

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ژورنال

عنوان ژورنال: Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles

سال: 2021

ISSN: ['1294-4475', '1953-8189']

DOI: https://doi.org/10.2516/ogst/2021031