公开(公告)号：US20170153154A1

公开(公告)日：2017-06-01

申请号：US15323932

申请日：2014-07-04

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01L1/24

Abstract: A device and system for detecting dynamic strain. The device comprises a longitudinally extending carrier and an optical fiber embedded along an outer surface of a length of the carrier. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths. The system comprises the device and an interrogator comprising a laser source and a photodetector. The interrogator is configured to perform interferometry by shining laser light along the optical fiber and detecting light reflected by the FBGs. The interrogator outputs dynamic strain measurements based on interferometry performed on the reflected light.

公开(公告)号：US09605537B2

公开(公告)日：2017-03-28

申请号：US14370198

申请日：2012-01-06

Applicant: John Hull ,  Philip Cheuk ,  Seyed Ehsan Jalilian

Inventor： John Hull ,  Philip Cheuk ,  Seyed Ehsan Jalilian

IPC: E21B47/18 ,  E21B47/04 ,  E21B47/14

CPC classification number: E21B47/18 ,  E21B47/04 ,  E21B47/14

Abstract: The present disclosure is directed at a method and system for determining relative depth of an acoustic event within a wellbore. The method includes obtaining two acoustic signals at two different and known depths in the wellbore, in which each of the acoustic signals includes the acoustic event; dividing each of the acoustic signals into windows; determining cross-correlations of pairs of the windows, in which each of the pairs includes one window from one of the acoustic signals and another window from the other of the acoustic signals that at least partially overlap each other in time; and determining the relative depth of the acoustic event relative to the two known depths from the cross-correlations. The acoustic event may represent, for example, fluid flowing from formation into the wellbore (or vice-versa) or fluid flowing across any casing or tubing located within the wellbore.

公开(公告)号：US09057254B2

公开(公告)日：2015-06-16

申请号：US13017620

申请日：2011-01-31

Applicant: John Hull

Inventor： John Hull

IPC: E21B47/10

CPC classification number: E21B47/101

Abstract: A method for detecting fluid ingress in a wellbore. An acoustic sensor is placed along a wellbore. The acoustic sensor is adapted to sense individual acoustic signals from a plurality of corresponding locations along the wellbore. The individual acoustic signals are analyzed to determine if there exists a common acoustic component in acoustic signals generated from proximate locations in the wellbore. If so, the acoustic signal having the common acoustic component which appears earliest in phase, by virtue of such acoustic signal's corresponding location in the wellbore, determines the location in the wellbore of likely fluid ingress. The acoustic sensor may be a fiber optic cable extending substantially the length of the wellbore, or alternatively a plurality of microphones situated at various locations along the wellbore.

Abstract translation: 一种用于检测井眼中的流体入口的方法。 声学传感器沿着井筒放置。 声传感器适于感测来自沿井筒的多个对应位置的各个声信号。 分析单独的声学信号以确定在井眼中从最近位置产生的声学信号中是否存在共同的声学分量。 如果是这样，具有最早同相出现的共同声学分量的声学信号由于这种声学信号在井眼中的对应位置确定井眼中可能的流体入口的位置。 声学传感器可以是基本上延伸的井眼的长度的光缆，或者替代地位于沿着井筒的各个位置处的多个麦克风。

公开(公告)号：US20150034306A1

公开(公告)日：2015-02-05

申请号：US14370198

申请日：2012-01-06

Applicant: John Hull ,  Philip Cheuk ,  Seyed Ehsan Jalilian

Inventor： John Hull ,  Philip Cheuk ,  Seyed Ehsan Jalilian

IPC: E21B47/18 ,  E21B47/04

CPC classification number: E21B47/18 ,  E21B47/04 ,  E21B47/14

Abstract: The present disclosure is directed at a method and system for determining relative depth of an acoustic event within a wellbore. The method includes obtaining two acoustic signals at two different and known depths in the wellbore, in which each of the acoustic signals includes the acoustic event; dividing each of the acoustic signals into windows; determining cross-correlations of pairs of the windows, in which each of the pairs includes one window from one of the acoustic signals and another window from the other of the acoustic signals that at least partially overlap each other in time; and determining the relative depth of the acoustic event relative to the two known depths from the cross-correlations. The acoustic event may represent, for example, fluid flowing from formation into the wellbore (or vice-versa) or fluid flowing across any casing or tubing located within the wellbore.

Abstract translation: 本公开涉及一种用于确定井眼内的声学事件的相对深度的方法和系统。 该方法包括在井眼中的两个不同和已知的深度处获得两个声信号，其中每个声信号包括声学事件; 将每个声信号分成窗口; 确定所述窗口对中的互相关，其中每个所述对包括来自所述声信号中的一个的一个窗口和来自至少部分地在时间上彼此重叠的另一声音信号的另一窗口; 并且从交叉相关性确定相对于两个已知深度的声学事件的相对深度。 声学事件可以表示例如流体从地层流入井筒（或反之亦然）或流过位于井筒内的任何套管或管道的流体。

公开(公告)号：US20130167628A1

公开(公告)日：2013-07-04

申请号：US13682502

申请日：2012-11-20

Applicant: HiFi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01V1/00 ,  G06F17/00 ,  G01V8/10

CPC classification number: G01V1/001 ,  E21B47/101 ,  E21B47/1025 ,  E21B47/123 ,  G01V8/10 ,  G06F17/00

Abstract: The present disclosure is directed at methods, apparatuses, and techniques for detecting an acoustic event along a channel. Different wavelengths of an optical signal are multiplexed along a fiber optic strand extending along the channel. The strand has groups of transducers located along its length, and all of the transducers in any one of the groups reflect a tuned wavelength when not under strain. The wavelength that the transducers reflect changes in response to strain. Optical signal processing equipment receives reflected optical signals from the groups of transducers, and determines, for each of the groups of transducers, differences between wavelengths of the optical signals reflected by the transducers of that group and the tuned wavelength for that group. The differences correspond to the loudness of the event measured by that group of transducers, which can then be graphically represented to a person for analysis.

Abstract translation: 本公开涉及用于检测沿着信道的声学事件的方法，装置和技术。 光信号的不同波长沿沿着信道延伸的光纤链多路复用。 绞线具有沿其长度定位的换能器组，并且任何一个组中的所有换能器在不在应变下时反射调谐波长。 换能器反射的波长响应于应变而变化。 光信号处理设备从传感器组接收反射的光信号，并且为每组换能器确定由该组的换能器反射的光信号的波长与该组的调谐波长之间的差异。 差异对应于由该组换能器测量的事件的响度，其然后可以图形地表示给人以进行分析。