Ansai oil field in Ordos basin is a ultra low permeability reservoir with natural and induced fractures, which caused serious lateral heterogeneity of permeability in the reservoir.
鄂尔多斯盆地安塞特低渗透油田由于存在天然裂缝或人工压裂裂缝，造成了储集层平面渗透率的方向非均质性。
The permeability of Jiangsu oil field widely distributed including high, medium, low and ultra-low permeability.
江苏油田高、中、低及特低渗透储层均有。
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