原油増進回収法（EOR）の動向と展望

抄録

Yearly production contributions of Enhanced Oil Recover y（EOR）are gradually increased since a number of oil reservoirs in the world are matured due to the production. Different methods have been applied to the various oil fields through continuous technology development. Thermal EOR such as steam injection to recover viscous oil has been a large contributor for a long period. While, many efforts have been devoted to apply chemical EOR to increase oil recovery, which might bring more efficient development with optimized chemical materials for the specific target field. Energy transition requires environmentally friendly EOR even under current lower oil price circumstances. Gas EOR, particularly CO₂-EOR is one of promising technologies to increase the recovery factor and also to store anthropogenic CO₂ to mitigate climate change. The paper reviews the trend and prospects of different EOR, mainly focuses on（1）CO₂-EOR and CCS,（2）recent advancement of chemical EOR,（3）Low Salinity Water Flooding（LSWF） as a new cost efficient approach. In addition, advances of nanoparticle-based EOR are briefly described.