矿业科学学报2025，Vol.10Issue(1)：137-150,14.DOI:10.19606/j.cnki.jmst.2024942
基于超声测试的深部煤层气储层脆性表征
Characterization of brittleness property for deep coalbed methane reservoirs based on ultrasonic test data
摘要
Abstract
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,e-quivalent porosity and pore aspect ratio on the brittleness of deep coalbed methane reservoirs were ana-lyzed.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 de-pendence,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.关键词
深部/煤/脆性/超声速度/岩石物理建模Key words
deep/coal/brittleness/ultrasonic velocity/rock physics modeling分类
矿山工程引用本文复制引用
郭永红,王国伟,张迎春,刘毅,张乐,杨小勇,陈豪..基于超声测试的深部煤层气储层脆性表征[J].矿业科学学报,2025,10(1):137-150,14.基金项目
国家自然基金创新研究群体(52121003) （52121003）
中央高校基本科研业务费专项资金(2024ZKPYDC03) （2024ZKPYDC03）
国家能源集团重点科技攻关(GJNY-22-126) （GJNY-22-126）
