公开(公告)号：US09617848B2

公开(公告)日：2017-04-11

申请号：US13320884

申请日：2010-05-27

申请人： David John Hill ,  Magnus McEwen-King ,  Patrick Tindell

发明人： David John Hill ,  Magnus McEwen-King ,  Patrick Tindell

IPC分类号： G01V1/50 ,  E21B47/16 ,  E21B43/1185 ,  E21B43/26 ,  E21B47/10 ,  E21B47/12 ,  G01H9/00

CPC分类号： E21B47/16 ,  E21B43/11857 ,  E21B43/26 ,  E21B47/101 ,  E21B47/123 ,  G01H9/004 ,  G01V1/50 ,  G01V2210/1429 ,  G01V2210/646

摘要： This application describes methods and apparatus for downhole monitoring in real-time. The method involves interrogating an unmodified optic fiber (102) arranged along the path of a well bore (106) to provide a distributed acoustic sensor and sampling data gathered from a plurality of sensing portions of the fiber. The sampled data is then processed to provide a real-time indication of the acoustic signals detected by the sensing portions of the fiber. The real-time indication provides information to an operator or controller of the downwell process with real-time feedback data regarding what is happening during the downwell process which allows the identification of any problems and adjustment of the process parameters.

公开(公告)号：US08950482B2

公开(公告)日：2015-02-10

申请号：US13320882

申请日：2010-05-27

申请人： David John Hill ,  Magnus McEwen-King ,  Patrick Tindell

发明人： David John Hill ,  Magnus McEwen-King ,  Patrick Tindell

IPC分类号： E21B43/26 ,  E21B47/00 ,  E21B47/10 ,  E21B43/1185 ,  E21B47/12 ,  G01V1/50 ,  G01H9/00

CPC分类号： E21B47/16 ,  E21B43/11857 ,  E21B43/26 ,  E21B47/101 ,  E21B47/123 ,  G01H9/004 ,  G01V1/50 ,  G01V2210/1429 ,  G01V2210/646

摘要： This application relates to methods and apparatus for monitoring hydraulic fracturing during oil/gas well formation. A fiber optic cable (102) deployed down a well bore (106), which may be the well bore in which fracturing is performed, is interrogated to provide a distributed acoustic sensor. Data is sampled from at least one longitudinal sensing portion of the fiber and processed to provide at least fracturing characteristic. The fracturing characteristic may comprise the characteristics of high frequency transients indicative of fracturing events (606). The intensity, frequency, duration and signal evolution of the transients may be monitored to provide the fracturing characteristic. Additionally or alternatively the fracturing characteristic may comprise the longer term acoustic noise generated by fracture fluid flow to the fracture sites. The intensity and frequency of the noise may be analyzed to determine the fracturing characteristic. The method allows real-time control of the fracturing process.

摘要翻译： 本申请涉及在油气成井期间监测水力压裂的方法和装置。 询问在井下（106）下展开的光纤电缆（102），其可以是执行压裂的井眼，以提供分布式声学传感器。 从纤维的至少一个纵向感测部分采样数据，并进行处理以至少提供压裂特性。 压裂特性可以包括指示压裂事件的高频瞬变的特征（606）。 可以监测瞬态的强度，频率，持续时间和信号演化以提供压裂特性。 附加地或替代地，压裂特性可以包括由断裂流体流向裂缝位置产生的较长期声学噪声。 可以分析噪声的强度和频率，以确定压裂特性。 该方法允许对压裂过程进行实时控制。