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长庆油田的发展是在不断挑战低渗透极限过程中实现的。这不仅对破解致密性油气藏开发的难题具有里程碑意义,而且对传统石油工业如何走新型工业化之路,具有重要示范作用。超低渗透是长庆油田上产5000万吨的最大对手。长庆油田探明的石油储量70%以上的油藏渗透率在1毫达西以下,这是国际上界定超低渗透的界线。渗透率小于0.5毫达西的超低渗油藏,由于比低渗和特低渗油藏压力更低,岩性更加致密,开发难度远大于低渗和特低渗油气田。
The development of Changqing Oilfield is achieved in the process of constantly challenging the low penetration limit. This is not only a milestone in solving the difficult problem of developing tight oil and gas reservoirs, but also an important demonstration of how the traditional petroleum industry takes a new road to industrialization. Ultra-low permeability is the largest rival in Changqing Oilfield 50 million tons. The reservoir permeability of more than 70% of proven oil reserves in Changqing Oilfield is below 1 md West, which is the international definition of ultra-low permeability. Ultra-low permeability reservoirs with permeability less than 0.5 millidarcy are much harder to develop than low and low permeability oil fields because of their lower pressure and permeability than those of low and low permeability reservoirs.