公开(公告)号：US06188222B1

公开(公告)日：2001-02-13

申请号：US09148013

申请日：1998-09-04

申请人： Jean P. Seydoux ,  Jacques R. Tabanou

发明人： Jean P. Seydoux ,  Jacques R. Tabanou

IPC分类号： G01V328

CPC分类号： G01V3/28 ,  E21B47/12 ,  E21B47/122

摘要： The method and apparatus of the invention determines earth formation resistivity at extended depths into the formation by the use of telemetry transmission signals to measure the formation resistivity. The telemetry transmission signals carry measurement data from downhole sensors through the formation to an uphole receiver. The signal transmission is by means of induction telemetry. At the receiver, the signal is demodulated to obtain the transmitted measurement data. During the detection of the signal at the receiver, the signal amplitude is also extracted and is used to determine the formation resistivity. In addition, changes in the signal amplitude are also used to indicate formation boundaries for determining well location during directional drilling.

摘要翻译： 本发明的方法和装置通过使用遥测传输信号来测量地层电阻率来确定扩展深度到地层中的地层电阻率。 遥测传输信号通过地层将井下传感器的测量数据传送到井上接收器。 信号传输是通过感应遥测。 在接收机处，对信号进行解调，得到发送的测量数据。 在接收机检测到信号期间，信号幅度也被提取，用于确定地层电阻率。 此外，信号幅度的变化也用于指示在定向钻井期间确定井位置的地层边界。