Application of the fiber-optic distributed temperature sensing for monitoring the liquid level of producing oil wells |
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| Affiliation: | 1. Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing 100192, China;2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing 100016, China;3. Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science & Technology University, Beijing 100192, China;1. School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China;2. College of Physics and Energy, Shenzhen University, 518060, China;3. Institute of Ocean Research, Peking University, Beijing 100871, China;1. Institute of Engineering Technology, Xinjiang Oilfield Company, Karamay 834000, China;2. Department of Electronic Engineering, Beijing 100084, China;1. State Key Lab for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, 100871, China;2. HEDPS, Center for Applied Physics and Technologies, Peking University, Beijing, 100871, China |
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| Abstract: | In the process of petroleum exploitation, liquid level is a significant parameter to determine reasonable production of oil wells. In this paper a novel optical fiber based method is presented to monitor working liquid level of oil well which contains foam section. This method utilizes the principle of heat transfer variation in different medium and Raman optical scattering. A distributed temperature sensor composed of optical fiber and heating cable is proposed and can be placed in the casing–tubing annulus. According to the sudden variations of measured temperature, the interface of gas–foam, foam–liquid can be identified accurately. |
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| Keywords: | Oil well Liquid level Optical fiber Distributed sensing |
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