Effect of fines migration on oil recovery from carbonate rocks

We perform single-phase and two-phase flooding on Edwards Brown rock samples. The injection was of seawater or CaCl2 brine, at successive salinities 0.63, 0.21, 0.07, 0.05, 0 mol/L (distilled water). For brine experimental run, no significant fines migration permeability decrease is observed. distilled water found to bring about the highest concentration produced most decrease, with ultimate being 99.94%. Therefore, used stimulate in following runs. Two-phase experiments are performed four samples using as aqueous phase, Soltrol® 130 crude oil oleic phase. Rock initially fully saturated 0.63 selected solution. This followed by injecting a constant rate for least 20 pore volumes displace brine. Next, injected oil, finally water. recover additional either type oil. However, seawater, production observed during reduce relative two orders magnitude when three used. runs also brought recovery injection: 18% 3.4% last result can be attributed plugging pores due migration, which divert further into previously unswept pores. Cited as: Almutairi, A., Saira, S., Wang, Y., Le-Hussain, F. Effect from carbonate rocks. Advances Geo-Energy Research, 2023, 8(1): 61-70. https://doi.org/10.46690/ager.2023.04.06