Lithofacies vary significantly in alluvial fan, and this results in serious reservoir heterogeneity.
冲积扇体系岩相空间上复杂多变，储层非均质性严重。
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。
Zhongyuan oil field is a complex fault block sandstone reservoir, which has deep oil reservoir rock, low permeability and serious heterogeneity.
中原油田是一个复杂断块砂岩油气田，储集层埋藏深，渗透率低，非均质严重。
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