oil-gas well engineering
石油与自然气工程Oil and Natural Gas Engineering 油气井工程Oil-Gas Well Engineering 油气田开发工程Oil-Gas Field Development Engineering ..
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井壁失稳一直是困扰油气井工程的难题，泥页岩渗透特性的定量测定是评价泥页岩井壁稳定性的重要指标之一。
The problem of wellbore instability has been puzzling drilling operations all the time, and to quantify the permeability of shales is an important index to estimate shale-borehole's instability.
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