石油科学通报2026，Vol.11Issue(4)：1065-1081,17.DOI:10.3969/j.issn.2096-1693.2026.03.013
水平井压裂正交裂缝扩展诱发光纤应变演化特征研究
Study on the evolution characteristics of fiber-optic strain induced by orthogonal fracture propagation in horizontal well fracturing
摘要
Abstract
Accurately monitoring the propagation of orthogonal fractures in shale reservoirs is of great significance for optimizing construction parameters and improving economic benefits.In response to the difficulty of evaluating the propagation of orthogonal fractures in on-site fiber-optic monitoring,a mechanical model for adjacent well fiberoptic monitoring orthogonal fracture propagation considering the tensile mechanical behavior during the fracture propagation process is established.Physical simulation experiments are conducted on horizontal well fracturing of shale specimens using fiberoptic monitoring.The mechanism of adjacent well fiber-optic monitoring orthogonal fractures is revealed,and the evolution characteristics of adjacent well fiber-optic strain induced by orthogonal fracture propagation are elucidated.A method for evaluating the propagation of orthogonal fractures based on adjacent well fiber-optic strain data was constructed.Research has shown that orthogonal fracture propagation induces five stages of strain enhancement stage,strain contraction convergence stage,strain linear stage,compressive strain contraction convergence stage,and strain stabilization stage in horizontal adjacent well optical fibers;orthogonal fractures induce three stages of strain enhancement stage,strain linear convergence stage,and strain divergence stage in vertical adjacent well optical fibers;the distance between the adjacent well optical fiber and the injection point determines the strength of the fiber-optic strain response signal.If the distance between the adjacent well optical fiber and the wellbore is too far,it will lead to the absence of the fiber-optic strain evolution stage.In physical simulation experiments,fiber-optic strain data can determine the number of hydraulic fractures and fractures initiation time.Competitive propagation phenomena may occur during orthogonal fracture propagation,and there is mutual influence between the vertical and horizontal sensing segments of the optical fiber.This study provides important reference for the effective monitoring and construction parameter optimization of orthogonal fractures in shale oil and gas reservoirs.关键词
分布式光纤监测/光纤应变/水力压裂/正交裂缝/光纤滑移Key words
distributed fiber-optic sensing/fiber-optic strain/hydraulic fracturing/orthogonal fractures/fiber slippage分类
能源科技引用本文复制引用
王溯,隋微波,张鲲鹏,陈勉,方正..水平井压裂正交裂缝扩展诱发光纤应变演化特征研究[J].石油科学通报,2026,11(4):1065-1081,17.基金项目
国家自然科学基金重点项目"提高超深大斜度井压裂效率的关键力学问题研究"(52334001)资助 （52334001）
