In order to enhance the foresight of oil recovery engineering, the technologies of production engineering are classified into such groups as basic theory research, soft science, and applicable group.

• 为提高采油工程系统科技规划的预见性，将采油工程系统分为基础理论类、软科学类、应用技术类，其中应用技术类将产生直接经济效益。