Читать книгу Acoustic and Vibrational Enhanced Oil Recovery - George V. Chilingar - Страница 18

In order to investigate some problems involved in the primary migration of oil, Aoyagi et al. (1985) [3] compacted Na-monmorillonite clay mixed with seawater and crude oil for 25 days under a pressure of 1,000 kg/cm² and a temperature of 60°C. The proportion of oil in the expelled liquid increased with time. The porosity of the compacted sample decreased from 81% to ≈26%. These authors concluded that the primary migration of oil from source rocks to reservoir rocks occurred chiefly during the late compaction state (ϕ = 10%−30%). Considering the fact that tectonic activity during the primary migration of oil was intense, the oil was simply squeezed out (expelled) from the source rock.