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2019 — Study on the Feasibility of Nitrogen Huff-N-Puff in Heavy Oil ReservoirsRésumé
For heavy reservoirs, conventional oil recovery methods are polymer flooding and Steam-assisted Gravity Drainage (SAGD). Such methods are affected by various factors including reservoir thickness, formation heterogeneity, heat loss, and cost, especially in heavy oil reservoirs with depths ranging from 1000 to 2000 m. In these relatively deep reservoirs, the temperature is generally around 40 to 50℃. Their crude oil has a viscosity in the tens of thousands of centipoises at surface conditions, but only a few hundred centipoises at high temperature in the reservoirs. At this reservoir condition, there is sufficient mobility of crude oil making it possible for … Lire la suite