Experimental simulation on oil–water–rock interaction in deep zones

One-dimensional experimental simulation is carried out to study the mechanism of oil migration and accumulation in deep zones, the changes in the fluid components caused by oil–water–rock interaction during the process of fluid migration and the effect of the changes on reservoirs under certain temperature and pressure. The result shows that under certain temperature and pressure, many changes, which include their chemical components and the inner structure of rocks etc., occurred during oil migration from the bottom upwards along the experimental apparatus with the increased charging amount of crude oil. Especially, the biomarkers and mass composition of all samples derived from experiment unveil the existence of geochromatographic effect during the oil migration. And the dissolution has acted on mineral composition of oily-sands during the oil–water–rock interaction, which strengthens gradually during hydrocarbon migration from the bottom up along the apparatus.