常州大学学报（自然科学版）2025，Vol.37Issue(5)：28-38,11.DOI:10.3969/j.issn.2095-0411.2025.05.004
龙马溪组海相页岩水化多尺度结构变化特征
Multi-scale structure change characteristics of marine shale hydration in Longmaxi Formation
摘要
Abstract
To study the damage characteristics of shale structure induced by water-based working flu-id,the structural change characteristics of shale before and after interact with different angles of bed-ding were studied through imbibition experiments and fixed-point observation experiments,and the damage model of shale hydration structure was constructed through binary extraction.The results show that a large number of macroscopic cracks and some secondary cracks appear on the bedding sur-face,forming a complex fracture network after shale hydration.After hydration for 2 h,obvious dis-solution occurs on the surface of the shale.The obvious dissolution pores appeared after hydration for 24 h.Large-scale dissolution occurs after 48 h of hydration,and the primary cracks extend.The dis-solution phenomenon is more obvious than the crack propagation.The diameter of the largest pore in-creases from 2.94 nm to 4.77 nm,and the gap surface ratio of shale surface increases from 0.41%to 7.85%.The gap surface ratio and hydration time conform to the logarithmic function law.This study clarifies the damage characteristics of shale hydration structure and quantitatively characterizes the damage model of shale structure,which provides theoretical support for revealing the mechanism of shale hydration.关键词
页岩水化/裂缝延伸/定点观测/二值化方法Key words
shale hydration/crack extension/fixed-point observations/binarization method分类
能源科技引用本文复制引用
庄严,张甜甜,刘向君,张世锋,窦祥骥,赵新礼..龙马溪组海相页岩水化多尺度结构变化特征[J].常州大学学报（自然科学版）,2025,37(5):28-38,11.基金项目
油气藏地质及开发工程全国重点实验室(西南石油大学)资助项目(PLN202314). （西南石油大学）
