重庆科技大学学报（自然科学版）2025，Vol.27Issue(2)：21-29,9.DOI:10.19406/j.issn.2097-4531.2025.02.003
水化作用下硬脆性泥页岩理化性能与力学特性实验研究
An Experimental Study of the Physic-Chemical Properties of Hard and Brittle Shale Under Hydration
摘要
Abstract
Taking Beibu gulf basin as the subject,this paper does an experimental research on the physic-chemical properties of hard and brittle shale under hydration,aiming to understand their hydration mechanism.The mud-stone formation of the three strata(L2,L3,W)in the Beibu gulf basin are largely composed of clay,and mainly contain illite and illite mixed layers,characterized by such as bedding and microcracks.The results show as fol-lows:1)the W group rock sample completely lost its bearing capacity after soaked in clean water,while the L2 and L3 rock samples are fragmented and fallen.2)under the immersion of water or drilling fluid,the hardness and shear strength of groups L2,L3,and W are significantly weakened.3)clear water has the greatest impact on the hardness of L2,L3,and W rocks,followed by drilling fluid 1#,and drilling fluid 2#has the least impact.Based on the results of this experiment,the drilling fluid system is selected and optimized,and the risk of wellbore instability is controlled to a certain extent.关键词
北部湾盆地/硬脆性泥页岩/水化作用/理化性能/力学特性/钻井液Key words
Beibu gulf basin/hard brittle shale/hydration/physic-chemical properties/mechanical properties/drilling fluid分类
石油、天然气工程引用本文复制引用
曹峰,李龙,余小龙,丁乙,黄静,张超..水化作用下硬脆性泥页岩理化性能与力学特性实验研究[J].重庆科技大学学报（自然科学版）,2025,27(2):21-29,9.基金项目
国家自然科学基金青年基金项目"高温高应力深层页岩渗吸-水化耦合机制"(42202194) （42202194）
