为探究深部煤层气储层脆性及其各向异性特征，分析有机质和黏土总含量及定向排列程度、等效孔隙率及孔隙纵横比等物性参数对深部煤层气储层脆性特征的影响。首先采集20块太原组8号煤层的原生结构煤样开展微观观察、物性测试和超声速度测试。然后基于试验结果和微观观察，构建深部煤层气储层各向异性岩石物理模型，最后建立二维脆性岩石物理量版。结果表明：煤样脆性具有明显的方向依赖性，且平行和垂直层理方向脆性性质具有相关性，平行和垂直层理方向的杨氏模量差异与速度差异呈正相关关系，泊松比和脆性指数各向异性与速度各向异性参数呈负相关关系。试验数据验证表明所构建的岩石物理模型能够有效刻画煤组分、结构对储层脆性特征影响。

To explore the brittleness and its anisotropy of deep coalbed methane reservoir, the effects of parameters such as the total content of organic matter and clay and the preferred orientation degree, equivalent porosity and pore aspect ratio on the brittleness of deep coalbed methane reservoirs were analyzed. Firstly, 20 primary structural coal samples from No.8 coal seam of Taiyuan Group were collected to carry out microscopic observation, physical property experiments and ultrasonic velocity experiments. Then an anisotropic rock physics model of the deep coalbed methane reservoir was constructed based on the experiment results and microscopic observation. Finally, a two-dimensional brittle rock physics template is established. The results show that the brittleness of coal samples has obvious direction dependence, and the brittleness of parallel and perpendicular lamination directions are correlated. The difference of Young's modulus between parallel and perpendicular laminations is positively correlated with the difference of velocity, and the anisotropy of Poisson's ratio and brittleness index is negatively correlated with the velocity anisotropy parameter. The validation of experimental data shows that the petrophysical model constructed in the paper can effectively portray the influence of coal components and structure on the brittleness characteristics of the reservoir.