Wang C.,Key Laboratory of Optical Fiber Sensing Technology of Shandong Province
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2012
In the oil well logging, fluid flow is an extremely important parameter which determines the transmission characteristics of the oil production. Real-time monitoring of fluid flow parameter provides a scientific basis for the oil and gas optimization exploration and the increase of reservoir recovery. A new type of non-intrusive flowmeter based on fiber optic interferometer is proposed. The pipe's vibration is induced by turbulent flow and the fiber optic sensors wrapped closely around the outside wall of pipe are used to sense the information of vibration. The frequency characteristics of the pipe's vibration signals are found, and the relationship between the standard deviation of pipe wall's vibration induced by fully developed turbulence and the mean flow rate is determined. The experiment has accomplished flow monitoring whose range is from 5 m 3/h to 60 m 3/h, and the measurement accuracy is ±5%FS. It provides a good basis for further monitoring of the small flow.