Cuttings magnetic susceptibility and associated device

Abstract

A method comprises obtaining cuttings samples from a plurality of depths while drilling a wellbore in a subsurface formation. The method comprises performing the following operations for each of the cuttings samples, loading a cuttings sample into a container, loading the container into a magnetic susceptibility instrument configured with one or more sensors, and obtaining magnetic susceptibility measurements of the cuttings sample, via the one or more sensors.

1 . A method comprising:
 obtaining cuttings samples from a plurality of depths while drilling a wellbore in a subsurface formation; and   performing the following operations for each of the cuttings samples,
 loading a cuttings sample into a container, 
 loading the container into a magnetic susceptibility instrument configured with one or more sensors, and 
 obtaining magnetic susceptibility measurements of the cuttings sample, via the one or more sensors. 
   
     
     
         2 . The method of  claim 1 , wherein the cuttings samples are not washed prior to being loaded into the container. 
     
     
         3 . The method of  claim 1 , wherein the magnetic susceptibility instrument is configured with an autoloader to load the container into the magnetic susceptibility instrument. 
     
     
         4 . The method of  claim 1 , wherein the one or more sensors include one or more inductors and one or more receivers. 
     
     
         5 . The method of  claim 4  further comprising;
 applying a magnetic field to the cuttings sample in the container with the one or more inductors; and 
 obtaining the magnetic susceptibility measurements of the cuttings sample with the one or more receivers based on a cuttings sample response to the magnetic field. 
 
     
     
         6 . The method of  claim 1 , wherein the one or more sensors translates along a length of the container to obtain the magnetic susceptibility measurements of the cuttings sample, and wherein the one or more sensors translates around a perimeter of the container to obtain the magnetic susceptibility measurements of the cuttings sample. 
     
     
         7 . The method of  claim 1 , wherein the one or more sensors remain stationary when obtaining the magnetic susceptibility measurements of the cuttings sample. 
     
     
         8 . The method of  claim 1 , further comprising;
 labeling each of the magnetic susceptibility measurements with depths based on the corresponding cuttings sample;   generating a log comprising magnetic susceptibility measurements as a function of depth; and   performing a subsurface operation based on the log.   
     
     
         9 . The method of  claim 8 , further comprising;
 determining one or more subsurface formation properties based on the log, wherein the subsurface formation properties include changes in lithological properties over depth and changes in diagenetic environment over depth.   
     
     
         10 . A system comprising:
 a magnetic susceptibility instrument configured with one or more sensors;   a container configured to hold a cuttings sample;   a processor; and   a computer-readable medium having instructions stored thereon that are executable by the processor to cause the processor to,
 load the cuttings sample into the container, 
 load the container into the magnetic susceptibility instrument, and 
 obtaining magnetic susceptibility measurements of the cuttings sample, via the one or more sensors. 
   
     
     
         11 . The system of  claim 10 , wherein the cuttings sample is not washed prior to being loaded into the container. 
     
     
         12 . The system of  claim 10 , wherein the magnetic susceptibility instrument is configured with an autoloader to load the container into the magnetic susceptibility instrument. 
     
     
         13 . The system of  claim 10 , wherein the one or more sensors include one or more inductors and a one or more receivers. 
     
     
         14 . The system of  claim 13 , wherein the instructions further comprise;
 applying a magnetic field to the cuttings sample in the container with the one or more inductors; and   obtaining the magnetic susceptibility measurements of the cuttings sample with the one or more receivers based on a cuttings sample response to the magnetic field.   
     
     
         15 . The system of  claim 10 , wherein the one or more sensors translates along a length of the container to obtain the magnetic susceptibility measurements of the cuttings sample, and wherein the one or more sensors translates around a perimeter of the container to obtain the magnetic susceptibility measurements of the cuttings sample. 
     
     
         16 . The system of  claim 10 , wherein the one or more sensors remain stationary when obtaining the magnetic susceptibility measurements of the cuttings sample. 
     
     
         17 . A magnetic susceptibility instrument comprising:
 a container, wherein a cuttings sample obtained while drilling a wellbore in a subsurface formation is loaded into the container; and   one or more sensors, each of the one or more sensors configured to obtain magnetic susceptibility measurements of the cuttings sample in the container.   
     
     
         18 . The magnetic susceptibility instrument of  claim 17 , wherein the cuttings sample is not washed prior to being loaded into the container. 
     
     
         19 . The magnetic susceptibility instrument of  claim 17 , wherein the magnetic susceptibility instrument is configured with an autoloader to load the container into the magnetic susceptibility instrument. 
     
     
         20 . The magnetic susceptibility instrument of  claim 17 , wherein the one or more sensors are configured to translate along a length of the container to obtain the magnetic susceptibility measurements of the cuttings sample, and wherein the one or more sensors translates around a perimeter of the container to obtain the magnetic susceptibility measurements of the cuttings sample.