进而通过对椭圆形井眼周围岩石应力分布的分析，对不同岩性的地层确定了不同的井眼稳定性条件。
By analyzing the rock stress state around the elliptic borehole, the stability conditions are established for different types of formation.
进而通过对椭圆形井眼周围岩石应力分布的分析，对不同岩性的地层确定了不同的井眼稳定性条件。
By analyzing the rock stress state around the elliptic borehole, the stability conditions are established for different types of formation.
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