发明名称 |
ARRAYED WAVE DIVISION MULTIPLEXING TO IMPROVE SPATIAL RESOLUTION OF IOFDR FIBER BRAGG SENSING SYSTEM |
摘要 |
A downhole property measurement apparatus includes an optical fiber having a series fiber Bragg gratings with interleaved resonant wavelengths such that adjacent fiber Bragg gratings have different resonant wavelengths and a difference between adjacent resonant wavelengths is greater than a dynamic wavelength range of each of the adjacent fiber Bragg gratings. An optical interrogator is in optical communication with the optical fiber and configured to emit a frequency domain light signal having a swept wavelength for a first time duration and a chirp having a modulation of amplitude with a varying of wavelength for a second time duration that is less than the first time duration. A return light signal is transformed by the optical interrogator into a time domain to determine a resonant wavelength shift and corresponding location of each of the gratings. A processor converts the resonant wavelength shifts into the downhole property. |
申请公布号 |
WO2016126345(A1) |
申请公布日期 |
2016.08.11 |
申请号 |
WO2015US67811 |
申请日期 |
2015.12.29 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
BARRY, ALEXANDER M.;CHILDERS, BROOKS;DUNCAN, ROGER |
分类号 |
E21B47/00;G01V1/40;G01V1/46 |
主分类号 |
E21B47/00 |
代理机构 |
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代理人 |
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地址 |
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