Application of fiber optics in oil and gas field development—a review

Edouard, Mvomo N.; Okere, Chinedu J.; Dong, Pingchuan; Ejike, Chinedu; Emmanuel, Nnachi N.; Muchiri, Nguu Dickson

doi:10.1007/s12517-022-09659-2

Cited by 10 publications

(2 citation statements)

References 52 publications

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“…If the oil temperature of the transformer exceeds 70 °C, the data trend is expected to remain consistent with that observed below 70 °C. Additionally, it is important to note that this sensor can easily withstand the maximum allowable temperature for the oil transformer of more than 100 °C and harsh conditions [13].…”

Section: Temperature Measurementmentioning

confidence: 99%

“…For the long-term stability of the NCF sensor in HRI liquids, especially oil, NCF sensors in high-temperature oil environments are highly stable and durable, making them suitable for oil well monitoring. This sensor can withstand extreme temperatures and harsh conditions while maintaining minimal signal loss and consistent performance over extended periods [13]. The NCF sensor itself, made from single silica material, does not use any coating to sense high RI, which avoids issues related to coating degradation at high temperatures, ensuring long-term integrity.…”

Section: Power Transformer Application In Oil Aging Detectionmentioning

confidence: 99%

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Investigation of transformer oil aging using no-core optical fiber (NCF) sensor

Zaidi,

Saris,

Mohd Noor

et al. 2024

Phys. Scr.

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Transformer oil plays a crucial role in insulation and cooling within high-voltage transformers, but it degrades over time. This research proposes a durable sensor capable of detecting the refractive index (RI) of transformer oil when it exceeds the RI of the sensor structure, known as high refractive index (HRI) sensing. The study utilizes a no-core optical fiber (NCF) to monitor the quality of transformer oil. In this setup, single mode fiber (SMF) is employed as both the input and output of the NCF, forming an SMF-NCF-SMF (SNS) sensor. To date, to the use of an NCF in the SMF-NCF-SMF scheme has not been reported for high RI fiber sensing and transformer oil degradation detection. Additionally, this study provides an analysis of the influence of different diameters and lengths of NCF on the sensor’s sensitivity. The HRI sensing performance of the sensor was evaluated both numerically and experimentally by observing power spectrum changes due to leaky modes interference in response to varying transformer oil RI values from 1.4600 RIU to 1.5500 RIU. The NCF, with a geometry of 1 cm in length and 100 µm in diameter, demonstrated remarkable sensitivity, achieving up to 88.285 dBm/RIU for HRI values within the specified range. The sensor effectively discerned various aging levels of transformer oil in power transformer applications. Additionally, since the NCF structure is entirely composed of silica-based materials, it exhibited significant temperature resistance. These characteristics make the SNS structure well-suited for reliable deployment in challenging thermal environments.

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Section: Temperature Measurementmentioning

confidence: 99%

Section: Power Transformer Application In Oil Aging Detectionmentioning

confidence: 99%