光纤长期监测技术在煤层气开发中的应用  

Application of Long-term Fiber Optic Monitoring Technology in Coalbed Methane Development

作　　者：宁卫东 陈金宏 李剑 郭常伟 张国良 刘荣芳 NING Weidong;CHEN Jinhong;LI Jian;GUO Changwei;ZHANG Guoliang;LIU Rongfang(Huabei Branch of CNPC Logging Co.,Ltd.,Hebei 062550)

机构地区：[1]中国石油集团测井有限公司华北分公司,河北062550

出　　处：《中国煤层气》2024年第4期38-42,共5页China Coalbed Methane

摘　　要：煤层气储层动态监测受井筒条件限制,煤层动态监测效率低,监测资料少,无法准确分析各层段的开发情况,制约了煤层气开发动态矛盾分析和调整方案的制定。分布式光纤测井在华北某煤层气田开展了实际应用,在正常生产条件下实时反映了各层段的产气动态、环空液面变化,并反映了管柱在生产中发生的异常,起到了异常预警作用。本文从煤层气开发特点角度分析了煤层气开发监测需求和光纤监测的适用性,并通过实际案例展示了分布式光纤在煤层气井动态监测中能发挥的作用和效果,在一定程度上解决了煤层气多层开采监测难题。The dynamic monitoring of coalbed methane reservoirs is limited by wellbore conditions, resulting in low monitoring efficiency and insufficient data, making it difficult to accurately analyze the development status of each layer. This limitation hinders the analysis of dynamic issues and the formulation of adjustment plans for coalbed methane development. Distributed fiber optic logging has been practically applied in a certain coalbed methane field in North China. It reflects the gas production dynamics of each layer in real-time under normal production conditions, monitors the changes in annular fluid level, and detects anomalies in the tubing during production, providing early warning of these anomalies. This paper analyzes the monitoring needs of coalbed methane development and the applicability of fiber optic monitoring from the perspective of coalbed methane development characteristics. Through actual case studies, it demonstrates the role and effectiveness of distributed fiber optics in the dynamic monitoring of coalbed methane wells, to some extent resolving the challenges of multilayer coalbed methane extraction monitoring.

关 键 词：分布式光纤 煤层气 产出剖面 长期监测 

分 类 号：TE37[石油与天然气工程—油气田开发工程]