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基于相位光时域反射仪（phase-OTDR）和增强型散射光缆的天然气管道监测中试测试。

Pilot-scale testing of natural gas pipeline monitoring based on phase-OTDR and enhanced scatter optical fiber cable.

作者信息

Lalam Nageswara, Westbrook Paul, Naeem Khurram, Lu Ping, Ohodnicki Paul, Diemler Nathan, Buric Michael P, Wright Ruishu

机构信息

National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA.

NETL Research Support Contractor, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA.

出版信息

Sci Rep. 2023 Aug 28;13(1):14037. doi: 10.1038/s41598-023-41338-4.

DOI:10.1038/s41598-023-41338-4
PMID:37640901
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10462723/
Abstract

In this paper, we present the results of lab and pilot-scale testing of a continuously enhanced backscattering, or Rayleigh enhanced fiber cable that can improve distributed acoustic sensing performance. In addition, the Rayleigh-enhanced fiber is embedded within a tight buffered cable configuration to withstand and be compatible for field applications. The sensing fiber cable exhibits a Rayleigh enhancement of 13 dB compared to standard silica single-mode fiber while maintaining low attenuation of ≤ 0.4 dB/km. We built a phase-sensitive optical time domain reflectometry system to interrogate the enhanced backscattering fiber cable both in lab and pilot-scale tests. In the laboratory experiment, we analyzed the vibration performance of the enhanced backscattering fiber cable and compared it with the standard single-mode telecom fiber. Afterward, we field validated for natural gas pipeline vibration monitoring using a 4-inch diameter steel pipeline operating at a fixed pressure level of 1000 psi, and a flow rate of 5, 10, 15, and 20 ft/s. The feasibility of gas pipeline monitoring with the proposed enhanced backscattering fiber cable shows a substantial increase in vibration sensing performance. The pilot-scale testing results demonstrated in this paper enable pipeline operators to perform accurate flow monitoring, leak detection, third-party intrusion detection, and continuous pipeline ground movement.

摘要

在本文中，我们展示了一种连续增强背向散射（即瑞利增强型光纤电缆）的实验室及中试规模测试结果，该电缆可提升分布式声学传感性能。此外，瑞利增强型光纤被嵌入紧包缓冲电缆结构中，以耐受并适用于现场应用。与标准二氧化硅单模光纤相比，该传感光纤电缆的瑞利增强为13dB，同时保持≤0.4dB/km的低衰减。我们构建了一个相敏光时域反射仪系统，用于在实验室及中试规模测试中检测增强型背向散射光纤电缆。在实验室实验中，我们分析了增强型背向散射光纤电缆的振动性能，并将其与标准单模电信光纤进行了比较。之后，我们在一条直径4英寸、运行压力固定为1000psi、流速分别为5、10、15和20ft/s的钢管天然气管道上进行了现场验证，以监测天然气管道振动。使用所提出的增强型背向散射光纤电缆进行天然气管道监测的可行性表明，其振动传感性能有显著提升。本文展示的中试规模测试结果使管道运营商能够进行精确的流量监测、泄漏检测、第三方入侵检测以及持续的管道地面移动监测。

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