System and method for using a resistivity tool with wired drill pipe and one or more wells

Abstract

A resistivity tool is used with wired drill pipe and one or more wells. The resistivity tool has a transmitter, receiver modules located adjacent to the drill bit, and high sensitivity receiver modules located at greater distances from the drill bit relative to the receiver modules. The receiver modules and/or the high sensitivity receiver modules may also perform repeater functions for the wired drill pipe. The resistivity tool may provide information regarding a subsurface region of interest. The resistivity tool may be used in a system with sensors, and a distance between the sensors may be based on the type of measurement obtained by the sensors.

The following is claimed: 
     
         1 . A system to measure a resistivity of a subsurface formation comprising:
 a transmitter module having at least one antenna;   one or more sections of wired drill pipe in communication with the transmitter module; and   a first receiver module having at least one antenna and in communication with the one or more sections of wired drill pipe, wherein the receiver module and the transmitter module are separated by the one or more section of wired drill pipe.   
     
     
         2 . The system of  claim 1  wherein at least one of the transmitter module and the first receiver module is incorporated into a telemetry repeater in communication with the one or more sections of wired drill pipe. 
     
     
         3 . The system of  claim 1  wherein at least one of the transmitter module and the first receiver module performs the functions of a telemetry repeater for signals transmitted via the one or more sections of wired drill pipe. 
     
     
         4 . The system of  claim 1  wherein a distance between the transmitter module and the first receiver module is based on a depth of investigation. 
     
     
         5 . The system of  claim 1  wherein the first receiver module is located at a distance in excess of 100 feet from the transmitter module. 
     
     
         6 . The system of  claim 5  wherein the first receiver module is separated from the transmitter module by at least three sections of wired drill pipe. 
     
     
         7 . The system of  claim 1  further comprising a first clock associated with the transmitter module and a second clock associated with the fist receiver module wherein the first clock and the second clock are synchronized via data transmitted via the one or more sections of wired drill pipe. 
     
     
         8 . The system of  claim 1  wherein the transmitter module and the first receiver module provide data indicative of a position of a first wellbore relative to a second wellbore. 
     
     
         9 . The system of  claim 1  wherein the at least one antenna of the transmitter module or the first receiver module is tilted with respect to an axis extending through a length of the transmitter module. 
     
     
         10 . The system of  claim 1  wherein the at least one antenna of the transmitter module is axial or parallel to an axis extending through a length of the transmitter module. 
     
     
         11 . The method of  claim 1  wherein bending of the wired drill pipe varies the depth of investigation of the transmitter module and the first receiver module. 
     
     
         12 . A system for making a subsurface measurement comprising:
 a drill string comprising a plurality of wired drill pipes having a communication channel, the drill string extending into a subsurface formation;   a plurality of sensors distributed at distances along the drill string wherein the distances between the plurality of sensors is determined from an equation; and   wherein the plurality of sensors are in communication with the wired drill pipes.   
     
     
         13 . The system of  claim 12  wherein at least one of the sensors is located at a telemetry repeater in communication with the plurality of wired drill pipes, and further wherein the telemetry repeater amplifies a signal transmitted along the plurality of wired drill pipes. 
     
     
         14 . The system of  claim 12  wherein the equation is a linear equation. 
     
     
         15 . The system of  claim 12  wherein the equation is a exponential equation. 
     
     
         16 . The system of  claim 12  wherein the equation is a logarithmical equation. 
     
     
         17 . The system of  claim 12  wherein the plurality of sensors are equally spaced along the drill string. 
     
     
         18 . The system of  claim 12  wherein the equation describes dependence of subsurface measurement on an independent variable in a linear, inverse, logarithmical, exponential, or a power law fashion. 
     
     
         19 . The system of  claim 12  wherein the plurality of sensors measure a characteristic of a formation surrounding the drill string. 
     
     
         20 . The system of  claim 12  wherein the plurality of sensors measure a characteristic of the drill string.