components of heavy crude oil
Heavy Crude Oil Production
heavy crude oil reservoir
Heavy Crude Oil Sulfonates
Liaohe ultra heavy crude oil
Sulfonated Heavy Crude Oil
Viscous Heavy Crude Oil
Daqing Oil Field
大庆油田
大庆石油管理局
大庆油田科学研究设计院
大庆石油管理局勘探开发研究院
黑龙江省大庆油田勘探开发研究院地化室
deep-basin gas field beneath Daqing oil field
northern Daqing oil field
well Gulong 1 of Daqing oil field