With the development of deep energy resources, understanding variations in the physical and mechanical properties of rocks at different depths is significant. In this paper, core samples from ten different burial depths (1000 m, 1300 m, 1600 m, 1850 m, 2600 m, 3500 m, 4800 m, 5100 m, 5600 m, and 6400 m) were collected from the Songke No. 2 (SK-2) well and the Daqing Oilfield. To the best of our knowledge, this is the first study involving the physical property and uniaxial compression testing of rock cores from such a large range of burial depths. The experimental results show that the content of weak phase minerals decreases with increasing depth. The change in the hard phase minerals varies nonlinearly with depth. From 3500 to 5600 m, the content of hard phase minerals decreases, while the content of the middle phase minerals increases. The elastic modulus exponentially increases with increasing depth, while Poisson’s ratio decreases with increasing depth. Additionally, the uniaxial compressive strength displays a nonlinear logarithmic increase with increasing depth. Finally, the effects of petrophysical properties on the mechanical behavior of rock at different depths are discussed. The elastic modulus, Poisson’s ratio, and compressive strength all have a negative correlation with the content of weak phase minerals. These results have important value for studying the mechanics of rocks at different depths.

中文翻译：

---

单轴压缩条件下松辽盆地不同深度岩石物理力学性质的变化

随着深层能源的发展，了解不同深度岩石的物理和机械性质的变化具有重要意义。本文从Songke No.1收集了十个不同埋深的岩心样品（1000 m，1300 m，1600 m，1850 m，2600 m，3500 m，4800 m，5100 m，5600 m和6400 m）。 2（SK-2）井和大庆油田。据我们所知，这是首次涉及这么大埋深范围的岩心的物理性质和单轴压缩测试的研究。实验结果表明，弱相矿物的含量随深度的增加而降低。硬相矿物的变化随深度非线性变化。从3500到5600 m，硬相矿物的含量减少，而中相矿物的含量增加。弹性模量随深度增加而指数增加，而泊松比随深度增加而减少。此外，单轴抗压强度随着深度的增加显示出非线性对数增加。最后，讨论了岩石物性对不同深度岩石力学行为的影响。弹性模量，泊松比和抗压强度与弱相矿物的含量均呈负相关。这些结果对于研究不同深度的岩石力学具有重要价值。讨论了岩石物性对不同深度岩石力学行为的影响。弹性模量，泊松比和抗压强度与弱相矿物的含量均呈负相关。这些结果对研究不同深度的岩石力学具有重要价值。讨论了岩石物性对不同深度岩石力学行为的影响。弹性模量，泊松比和抗压强度与弱相矿物的含量均呈负相关。这些结果对研究不同深度的岩石力学具有重要价值。