测井技术2025，Vol.49Issue(4)：519-530,12.DOI:10.16489/j.issn.1004-1338.2025.04.004
海上大位移井注水剖面光纤监测反演方法
Inversion Method for Fiber-Optic Monitoring of Water Injection Profiles in Offshore Extended-Reach Wells
摘要
Abstract
Distributed temperature sensing(DTS)technology finds increasing application in injection/production dynamics monitoring in offshore wells.However,diagnosing the injection profile of offshore extended-reach wells based on DTS data remains challenging.This study establishes a temperature profile prediction model for water injection in extended-reach wells that incorporates the heat transfer characteristics of offshore completions and micro-thermal effects.The model simulates and analyzes the temperature profile characteristics in these wells,clarifies the influence patterns of various factors.An inversion model for DTS data is developed using the Markov Chain Monte Carlo(MCMC)algorithm,enabling quantitative interpretation of the injection profile.Through inveison simulations,it analyzes and optimizes the convergence accuracy and iteration count of the inversion model.It improve the accuracy of the inversion result significantly and achieves a simulated injection profile inversion error of less than 2.5%.Application tofiled well DTS data obtain an interpreted injection profile with an average error of less than 10%compared to downhole flowmeter measurements.This process identifies the primary water inflow zones and quantifies the percentage of inflow for each well segment.The results demonstrate that this method provides a robust basis for accurately evaluating water injection effectiveness and optimizing strategies in offshore extended-reach wells.关键词
注水剖面/分布式光纤温度传感/反演/马尔可夫链蒙特卡罗算法/海上大位移井/温度剖面/完井传热Key words
water injection profile/distributed temperature sensing(DTS)/inversion/Markov Chain Monte Carlo(MCMC)algorithm/offshore extended-reach wells/temperature profile/completion heat transfer分类
天文与地球科学引用本文复制引用
冉飞飞,罗红文,李颖,李海涛,艾文斌,张玺亮,熊瀚澜,陈柄杞,潘晓艺..海上大位移井注水剖面光纤监测反演方法[J].测井技术,2025,49(4):519-530,12.基金项目
国家自然科学基金面上项目"SNPs提升CO2地质封存泥岩盖层封堵能力的作用机制研究"(42272176) （42272176）
