Fiber-Optic Sensors: Playing Both Sides of the Energy Equation

A fiber-optic methane gas sensor system with improved accuracy using absorption-spectrum matched comb filter

“…Precaution measures in coal mine safety monitoring, pollution control or industrial process control are becoming more and more crucial [1]. The major causes of those serious accidents include coal-bed gas outburst induced explosion, underground mine fire, roof collapsing, and underground water flooding.…”

A novel noise suppression method for white light extrinsic Fabry-Perot interferometric fiber-optic pressure sensor in heavy oil thermal recovery downhole environment

“…Optical fiber sensors have been widely applied in oil and gas industry [1]. Currently Raman-backscattering based distributed temperature sensors (DTS) are used to provide the unique, real-time and full-well-bore temperature profiling [1][2][3].…”

“…Currently Raman-backscattering based distributed temperature sensors (DTS) are used to provide the unique, real-time and full-well-bore temperature profiling [1][2][3]. The temperature and spatial resolution of the DTS can be less than 0.1ºC and centimeter respectively [1,3].…”

“…Currently Raman-backscattering based distributed temperature sensors (DTS) are used to provide the unique, real-time and full-well-bore temperature profiling [1][2][3]. The temperature and spatial resolution of the DTS can be less than 0.1ºC and centimeter respectively [1,3]. For pressure measurement, the white light extrinsic Fabry-Perot interferometric (EFPI) sensor has been used to monitor the pressure information at several critical points downhole [4].…”

“…The trending information provided by the sensors are used as an indication of the applied steam pressure, the effectiveness of steam placement and the heating of the oil zone, and with the assistant of geology and reservoir fluids in the well, several useful information, e.g. daily oil production can be further forecasted [1,5].…”