Influence of Various Rock Types on the Recovery of Heavy Hydrocarbons by Supercritical Carbon Dioxide

Pavel Spirov; Svetlana Rudyk

doi:10.20944/preprints202404.1982.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 29 April 2024 / Approved: 30 April 2024 / Online: 30 April 2024 (11:41:12 CEST)

This study explores pressure, miscibility, and pore medium effects on heavy hydrocarbon recovery up to 65 MPa from four rock types: sand, tight sandstone, cavernous limestone, and oil sand. Results reveal MMP at 50 MPa, with peak recovery at 93% (56 MPa). Interestingly, recovery trends counter traditional expectations, notably decreasing in tight sandstone (42-56 MPa) and oil sand (50-65 MPa). Varied recoveries in cavernous limestone (25-56 MPa) highlight porosity and vug influence. Higher pressures hinder recovery due to SC-CO2's density and viscosity, favoring the immiscible process for efficient heavy hydrocarbon extraction.

CO2, CCSU-EOR, HHM, Carbonate.

Engineering, Energy and Fuel Technology

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Influence of Various Rock Types on the Recovery of Heavy Hydrocarbons by Supercritical Carbon Dioxide

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