石油勘探与开发2026，Vol.53Issue(1)：201-212,12.DOI:10.11698/PED.20250459
基于邻井光纤应变的裂缝宽度和高度迭代正则反演方法
An iterative regularized inversion method of fracture width and height using cross-well optical fiber strain
摘要
Abstract
The forward model of optical fiber strain induced by fractures,together with the associated model resolution matrix,is used to demonstrate the interpretability of fracture parameters once the fracture intersects the fiber.A regularized inversion framework for fracture parameters is established to evaluate the influence of measured data quality on the accuracy of iterative regularized inversion.An interpretation approach for both fracture width and height is proposed,and the synthetic forward data with measurement error and field examples are employed to validate the accuracy of the simultaneous inversion of fracture width and height.The results indicate that,after the fracture contacts the fiber,the strain response is strongly sensitive only to the fracture parameters at the intersection location,whereas the interpretability of parameters at other locations remains limited.The iterative regularized inversion method effectively suppresses the impact of measurement error and exhibits high computational efficiency,showing clear advantages for inversion applications.When incorporating the first-order regularization with a Neumann boundary constraint on the tip width,the inverted fracture-width distribution becomes highly sensitive to fracture height;thus,combined with a bisection strategy,simultaneous inversion of fracture width and height can be achieved.Examination using the model resolution matrix,noisy synthetic data,and field data confirms that the iterative regularized inversion model for fracture width and height provides high interpretive accuracy and can be applied to the calculation and analysis of fracture width,fracture height,net pressure and other parameters.关键词
光纤应变/裂缝诊断/正演模型/模型分辨率/迭代正则反演/计算效率/裂缝参数解释Key words
optical fiber strain/fracture diagnosis/forward model/model resolution/iterative regularized inversion/computational efficiency/fracture parameter interpretation分类
能源科技引用本文复制引用
陈铭,王子昂,郭天魁,刘拥赞,陈作荣..基于邻井光纤应变的裂缝宽度和高度迭代正则反演方法[J].石油勘探与开发,2026,53(1):201-212,12.基金项目
教育部U40项目(ZYGXONJSKYCXNLZCXM-E19) （ZYGXONJSKYCXNLZCXM-E19）
国家自然科学基金面上项目(52574078) （52574078）
