Halliburton Energy Services, Inc.

Xinwei Lan

Yenny Natali Martinez

Michel Joseph LeBlanc

Li Gao

John L Maida

Daniel Joshua Stark

Gireesh K Bhat

David L Perkins

Neal Gregory Skinner

David Andrew Barfoot

Ilker R Capoglu

Andreas Ellmauthaler

Leonardo De Oliveira Nunes

Han-Sun Choi

Andrew David Barfoot

The disclosed embodiments include an acoustic noise reduction device. In one embodiment, the device includes a first sensor operable to detect a first acoustic noise signal and a desired signal and to modulate a first plurality of optical signals in response to detecting at least one of the first acoustic noise signal and the desired signal. The device also includes a second sensor operable to detect a second acoustic noise signal and modulate a second plurality of optical signals in response to detecting the second acoustic noise signal. The device further includes a coupler that is connected to the first and second sensors, where components of the modulated first and second plurality of optical signals approximately cancel each other out.

Systems and methods to reduce acoustic noise in fiber optic based sensor systems

An apparatus, system, and method are disclosed herein. In one embodiment, the apparatus includes a plurality of valves. Each valve of the plurality of valves is associated with a respective production zone of a well. Each valve includes a valve body having a passage and an inflow fluid input through which a formation fluid from the respective production zone associated with the valve is to enter the passage of the valve body. Each valve further includes a sensor located within the valve body to detect a density of the formation fluid. The apparatus further includes a processor programmed to determine a fraction of a subject fluid in the formation fluid based on the density of the formation fluid and a density of the subject fluid.

Detecting a fraction of a component in a fluid

In one embodiment, the apparatus includes a production tubing for carrying fluids from a producing zone to a surface, and a three-way valve coupled to the production tubing, the three-way valve including an inlet from the production tubing, an outlet to the production tubing, and an inlet from the borehole surrounding the three-way valve. The apparatus further includes a resonant tube densitometer disposed in the outlet to the production tubing, the resonant tube densitometer configured to measure the density of the fluids. A flow meter is disposed in the outlet to the production tubing, the flow meter configured to measure volumetric flow of the fluids.

A property of a downhole fluid, for example, a chemical species or ion concentration, may be accurately determined and logged based on measurements received from an optical detector where the optical detector is fed information or signals from an optical system coupled to one or more electrochemical probes calibrated for one or more properties of a fluid. The one or more electrochemical probes provide a potential to the optical system based, at least in part, on exposure to the downhole fluid. The optical system receives an optical signal from a light source that is transmitted via a transmission line, such as a fiber optic cable. Downhole information from the optical system is transmitted to the surface via the same or another transmission line. Thus, the signals are in the optical domain rather than the electrical domain. Multiple properties may be measured simultaneously using the same transmission line.

Electrochemical sensing using optical systems with electrochemical probes for wellbore applications

An interrogation system may be coupled to a fiber-optic cable positioned in a wellbore to interrogate a plurality of optical sensors coupled to the fiber-optic cable. The interrogation system may include an optical frequency comb source having a plurality of narrowband optical carriers transmitting light to the plurality of optical sensors. Each of the plurality of optical sensors may include a pair of partial reflectors to reflect the light transmitted by the optical frequency comb to one or more optical receivers to receive the reflection signals In some aspects, the interrogation system may include a de-interleaver device for separating reflected light signals having adjacent wavelength into separate optical waveguides. In additional aspects, interrogation system may also include a data processing system having a processing device for performing interferometric measurements using the reflected light signals.

Optical frequency comb source for fiber sensor interferometer arrays

A device for fluid analysis including an integrated computational element (ICE), a sample cell that optically interacts the ICE with a sample to generate a computation light associated with a characteristic of the sample, and a fiber sensor that receives the computation light and converts the computation light into a heat, is provided. The fiber sensor is coupled with a detector through an optical link, and is configured to return a portion of probe light through the optical link to the detector based on the heat converted. A method for using the device for performing fluid analysis is provided. A system for fluid analysis including at least one device as above is also provided.

Fluid analysis system based on integrated computing element technology and fiber Bragg grating radiometry

A method may include transmitting a narrowband signal into a formation using a transmitter located in a wellbore. The narrowband signal is modified by passage of through the formation and the formation reflects at least a portion of the narrowband signal back to the wellbore resulting in a modified narrowband signal having a first frequency. The method also includes sensing the modified narrowband signal with an optical waveguide positioned in the wellbore, transmitting a source signal along a length of the optical waveguide, and obtaining a backscattered return signal from the optical waveguide. The backscattered return signal is sampled at a second frequency that is less than the Nyquist rate of the modified narrowband signal. The method further includes processing the backscattered return signal to obtain an amplitude of the modified narrowband signal.

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Houston, TX, United States of America

Xinwei Lan