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1. 发明授权

US11125909B2 Enhanced seismic surveying 有权
公开(公告)号：US11125909B2
公开(公告)日：2021-09-21
申请号：US15943197
申请日：2018-04-02
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer
IPC分类号： G01V11/00 , G01V1/22 , E21B47/135 , G01V1/40
摘要： Embodiments of the present invention help in the processing and interpretation of seismic survey data, by correlating or otherwise comparing or associating seismic data obtained from a seismic survey with flow information obtained from a well or borehole in the surveyed area. In particular, embodiments of the present invention allow for flow data representing a flow profile along a well that is being monitored by a distributed acoustic sensor to be determined, such that regions of higher flow in the well can be determined. For example, in the production zone the well will be perforated to allow oil to enter the well, but it has not previously been possible to determine accurately where in the production zone the oil is entering the well. However, by determining a flow rate profile along the well using the DAS then this provides information as to where in the perforated production zone oil is entering the well, and hence the location of oil bearing sands. This location can then be combined or otherwise correlated, used, or associated with petroleum reservoir location information obtained from the seismic survey, to improve the confidence and/or accuracy in the determined petroleum reservoir location.

2. 发明申请

US20210278255A1 Method and Apparatus for Optical Sensing 有权
公开(公告)号：US20210278255A1
公开(公告)日：2021-09-09
申请号：US17328014
申请日：2021-05-24
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Sergey Shatalin , Julian Dajczgewand , Mahmoud Farhadiroushan , Tom Parker
IPC分类号： G01D5/353 , G01H9/00
摘要： Embodiments of the invention provide an improved optical fiber distributed acoustic sensor system that makes use of an optical fiber having reflector portions distributed along its length in at least a first portion. In particular, in order to increase the spatial resolution of the sensor system to the maximum, the reflector portions are positioned along the fiber separated by a distance that is equivalent to twice the distance an optical pulse travels along the fiber in a single sampling period of the data acquisition opto-electronics within the sensor system. As such, no oversampling of the reflections of the optical pulses from the reflector portions is undertaken, which means that it is important that the sampling points for data acquisition in the sensor system are aligned with the reflections that arrive at the sensor system from along the sensing fiber. In order to ensure such alignment, adaptive delay componentry may be used to adaptively align the reflected optical signals (or their electrical analogues) with the sampling points. Alternatively, control over the sampling points can also be undertaken to re-synchronise the sampling points with the returning reflections. In addition, in order to allow higher speed sampling to be undertaken, reflection equalisation componentry may also be used to reduce the dynamic range of the returning reflections.

3. 发明申请

US20190323863A1 METHOD AND APPARATUS FOR OPTICAL SENSING 审中-公开
公开(公告)号：US20190323863A1
公开(公告)日：2019-10-24
申请号：US16474747
申请日：2018-01-05
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Sergey Shatalin , Julian Dajczgewand , Mahmoud Farhadiroushan , Tom Parker
IPC分类号： G01D5/353 , G01H9/00
摘要： An improved optical fiber distributed acoustic sensor system uses an optical fiber having reflector portions distributed along its length in at least a first portion. The reflector portions are positioned along the fiber separated by a distance that is equivalent to twice the distance an optical pulse travels along the fiber in a single sampling period of the data acquisition opto-electronics within the sensor system. No oversampling of the reflections of the optical pulses from the reflector portions is undertaken. The sampling points for data acquisition in the sensor system are aligned with the reflections that arrive at the sensor system from along the sensing fiber. Adaptive delay componentry adaptively aligns the reflected optical signals (or their electrical analogues) with the sampling points. Control over the sampling points can re-synchronise the sampling points with the returning reflections. Reflection equalisation componentry may reduce the dynamic range of the returning reflections.

4. 发明授权

US10451462B2 Optical fiber cable 有权
公开(公告)号：US10451462B2
公开(公告)日：2019-10-22
申请号：US15962196
申请日：2018-04-25
申请人： SILIXA LTD. , CHEVRON USA INC.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker , Sergey Shatalin , Dmitry Strusevich
IPC分类号： G01F1/66 , G02B6/44 , G01D5/353
摘要： Embodiments of the present invention provide a cable for optical fiber sensing applications formed from fiber wound around a cable core. A protective layer is then preferably placed over the top of the wound fiber, to protect the fiber, and to help keep it in place on the cable core. The cable core is preferably of a diameter to allow bend-insensitive fiber to be wound thereon with low bending losses. The effect of winding the fiber onto the cable core means that the longitudinal sensing resolution of the resulting cable is higher than simple straight fiber, when the cable is used with an optical fiber sensing system such as a DAS or DTS system. The achieved resolution for the resulting cable is a function of the fiber winding diameter and pitch, with a larger diameter and reduced winding pitch giving a higher longitudinal sensing resolution.

5. 发明授权

US10415373B2 Submersible pump monitoring 有权
公开(公告)号：US10415373B2
公开(公告)日：2019-09-17
申请号：US15122038
申请日：2015-03-02
申请人： Silixa Ltd.
发明人： Andrew Clarke , Daniel Finfer , Veronique Mahue , Tom Parker , Mahmoud Farhadiroushan
IPC分类号： E21B47/04 , E21B47/00 , E21B47/10 , E21B23/03 , E21B43/12 , E21B47/12 , G01H9/00 , G01F23/296
摘要： In order to address the above noted problems, embodiments of the present invention use distributed acoustic sensing to monitor the fluid level in an ESP activated well so as to monitor the condition and performance of the ESP. Embodiments of the invention use the ESP as an acoustic source in order to monitor the annulus fluid level within the well and to monitor the frequency of the ESP. Additionally, embodiments of the present invention may use distributed acoustic sensing to monitor the flow rates of the production fluid above and below the ESP to determine the pump's efficiency. In particular, some embodiments utilize one or more optical fibers to measure the acoustic waves generated by the ESP, wherein the fiber cabling has already been deployed along the length of the well. As such, the present invention is a non-invasive, in-situ method for monitoring the condition and performance of an ESP.

6. 发明申请

US20180224572A1 ENHANCED SEISMIC SURVEYING 审中-公开
公开(公告)号：US20180224572A1
公开(公告)日：2018-08-09
申请号：US15943197
申请日：2018-04-02
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer
IPC分类号： G01V11/00 , G01V1/22
CPC分类号： G01V11/00 , E21B47/123 , G01V1/226 , G01V1/40 , G01V2210/1429 , G01V2210/6161 , G01V2210/644
摘要： Embodiments of the present invention help in the processing and interpretation of seismic survey data, by correlating or otherwise comparing or associating seismic data obtained from a seismic survey with flow information obtained from a well or borehole in the surveyed area. In particular, embodiments of the present invention allow for flow data representing a flow profile along a well that is being monitored by a distributed acoustic sensor to be determined, such that regions of higher flow in the well can be determined. For example, in the production zone the well will be perforated to allow oil to enter the well, but it has not previously been possible to determine accurately where in the production zone the oil is entering the well. However, by determining a flow rate profile along the well using the DAS then this provides information as to where in the perforated production zone oil is entering the well, and hence the location of oil bearing sands. This location can then be combined or otherwise correlated, used, or associated with petroleum reservoir location information obtained from the seismic survey, to improve the confidence and/or accuracy in the determined petroleum reservoir location.

7. 发明申请

US20170082766A1 METHOD AND SYSTEM FOR DOWNHOLE OBJECT LOCATION AND ORIENTATION DETERMINATION 审中-公开
公开(公告)号：US20170082766A1
公开(公告)日：2017-03-23
申请号：US15311425
申请日：2015-05-15
申请人： Silixa Ltd.
发明人： Craig Milne , Brian Frankey , Tom Parker , Mahmoud Farhadiroushan
IPC分类号： G01V1/46 , E21B47/09 , G01V1/22 , G01V11/00 , G01D5/14
CPC分类号： G01V1/46 , E21B43/116 , E21B47/02208 , E21B47/091 , G01D5/14 , G01V1/226 , G01V1/44 , G01V11/002
摘要： A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.

8. 发明授权

US11022467B2 Method and apparatus for optical sensing 有权
公开(公告)号：US11022467B2
公开(公告)日：2021-06-01
申请号：US16474747
申请日：2018-01-05
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Sergey Shatalin , Julian Dajczgewand , Mahmoud Farhadiroushan , Tom Parker
IPC分类号： G02B6/36 , G01D5/353 , G01H9/00
摘要： An improved optical fiber distributed acoustic sensor system uses an optical fiber having reflector portions distributed along its length in at least a first portion. The reflector portions are positioned along the fiber separated by a distance that is equivalent to twice the distance an optical pulse travels along the fiber in a single sampling period of the data acquisition opto-electronics within the sensor system. No oversampling of the reflections of the optical pulses from the reflector portions is undertaken. The sampling points for data acquisition in the sensor system are aligned with the reflections that arrive at the sensor system from along the sensing fiber. Adaptive delay componentry adaptively aligns the reflected optical signals (or their electrical analogues) with the sampling points. Control over the sampling points can re-synchronise the sampling points with the returning reflections. Reflection equalisation componentry may reduce the dynamic range of the returning reflections.

9. 发明授权

US10704932B2 Range extension for optical fiber sensing systems 有权
公开(公告)号：US10704932B2
公开(公告)日：2020-07-07
申请号：US15532812
申请日：2015-12-02
申请人： Silixa Ltd. , Chevron U.S.A. Inc.
发明人： Tom Parker , Mahmoud Farhadiroushan , Arran Gillies
IPC分类号： G01D5/353 , G01H9/00 , G01M11/00 , G01K11/32
摘要： An optical fiber sensing system includes a sensing optical fiber and one or more optical amplifiers in series with the sensing fiber and arranged to increase the power of sensing pulses travelling along the fiber to thereby increase the range of the sensing system. The optical fiber sensing system is one selected from the group including an optical fiber distributed acoustic sensor (DAS), an optical fiber distributed temperature sensor (DTS), or an optical time domain reflectometry (OTDR) system.

10. 发明授权

US10345139B2 Non-isotropic acoustic cable 有权
公开(公告)号：US10345139B2
公开(公告)日：2019-07-09
申请号：US15804657
申请日：2017-11-06
申请人： Silixa Ltd.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Dmitry Strusevich , Sergey Shatalin , Tom Parker
IPC分类号： G01H9/00 , G01L1/24 , G01M7/00 , G02B6/44
摘要： Embodiments of the present invention address aliasing problems by providing a plurality of discrete acoustic sensors along a cable whereby acoustic signals may be measured in situations where the fiber optic cable has not been secured to a structure or area by a series of clamps. Acoustic sampling points are achieved by selectively enhancing the acoustic coupling between the outer layer and the at least one optical fiber arrangement, such that acoustic energy may be transmitted selectively from the outer layer to the at least one optical fiber arrangement. The resulting regions of acoustic coupling along the cable allow the optical fiber to detect acoustic signals. Regions between the outer layer and the at least one optical fiber arrangement that contain material which is acoustically insulating further this enhancement since acoustic waves are unable to travel through such mediums, or at least travel through such mediums at a reduced rate.

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