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。
An experimental procedure was designed to simulate the reservoir permeability (matrix, natural fractures and induced fractures) reduction as a function of increasing effective stress.
一个实验过程设计模仿水库渗透矩阵，天然的东西是一个增加有效压力的功能断裂和引起破裂减少。
Various natural fractures are the objective reason of leakage in carbonate reservoir, while the tools vibration, stress release and induced fractures are the external reasons of leakage.
天然裂缝发育是工区碳酸盐岩储层漏失的客观原因，钻具震动、应力释放、诱导裂缝是产生井漏的外部原因。
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