China Petroleum network news, Jilin oilfield small distance test area Nissan oil more than 40 tons, compared to water flooding increased by nearly 5 times, is more than twice the target of the project, prediction than water flooding enhanced recovery rate of 19.2%. This result has a definite technical direction for EOR in Tai Jing oilfield.
Since the Jilin oilfield in 2009 to carry out carbon dioxide flooding pilot test, researchers based on mixed phase test, deepen the understanding of the law of carbon dioxide flooding development, improve the method of control technology of injection and production, to ensure the water flooding to enhance oil recovery more than 13%. At the same time, technicians have also worked on the design methods of carbon dioxide immiscible and tight reservoir engineering to provide effective protection for low permeability / ultra-low permeability reservoirs.
In the test area of gas channeling and other issues, scientific research personnel to protect the mixed phase, gas channeling control, the effect of "principle, starting from the reservoir, through a series of research model, physical model experiment, determined each wells personalized injection production control plan, and adjust according to the dynamic production optimization changes in the effective control of the influence of gas channeling on the yield, the oil production well spacing test area reached more than 40 tons.
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