FIBER OPTIC DISTRIBUTED ACOUSTIC MEASUREMENTS VIA FMCW INTERROGATION
First Claim
Patent Images
1. A system to obtain acoustic information from a borehole penetrating the earth, the system comprising:
- a light source configured to provide a continuous output beam over a selected period of time;
a modulator configured to modulate the continuous output beam with a modulation signal to provide a frequency modulated continuous wave (FMCW) to be sent out on an optical fiber disposed along the borehole, the optical fiber including a plurality of reflectors at known locations along the optical fiber; and
a processor configured to process a light reflection signal from the optical fiber to determine the acoustic information.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method to obtain acoustic information from a borehole penetrating the earth are described. The system includes a light source to provide a continuous output beam and a modulator to modulate the continuous output beam with a modulation signal to provide a frequency modulated continuous wave (FMCW) to be sent out on an optical fiber disposed along the borehole, the optical fiber including a plurality of reflectors at known locations along the optical fiber. The system also includes a processor to process a light reflection signal from the optical fiber to determine the acoustic information.
-
Citations
17 Claims
-
1. A system to obtain acoustic information from a borehole penetrating the earth, the system comprising:
-
a light source configured to provide a continuous output beam over a selected period of time; a modulator configured to modulate the continuous output beam with a modulation signal to provide a frequency modulated continuous wave (FMCW) to be sent out on an optical fiber disposed along the borehole, the optical fiber including a plurality of reflectors at known locations along the optical fiber; and a processor configured to process a light reflection signal from the optical fiber to determine the acoustic information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of obtaining acoustic information from a borehole penetrating the earth, the method comprising:
-
disposing an optical fiber along the borehole, the optical fiber including a plurality of reflectors at known locations along the optical fiber; modulating a continuous output beam with a modulation signal to provide a frequency modulated continuous wave (FMCW) to be sent out on the optical fiber; and processing a light reflection signal from the optical fiber to determine the acoustic information. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification