This paper reports a detailed experimental analysis of this new method. Static and dynamic tests were conducted by exposing heavy-oil saturated fractured rocks to hot water and solvent alternately. Oil-wet sandstone and carbonate samples were saturated with heavy-crude oil and tested against different solvents, namely heptane, kerosene, decane and light crude. Fractured cores were tested under dynamic conditions with different solvent injection rates to explore the rate dependency of the process. The physics of the injection rate and the role of asphaltene as a bi-product were examined and discussed. Understanding the physics of this new technique will contribute to the development of an alternative method at field conditions for unlocking trapped heavy matrix oil from oil-wet, fractured, and deep carbonate fields.
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