Nmr measurements and methods of analyzing nmr data

Abstract

NMR measurements and methods of analyzing those measurements are disclosed. A single NMR measurement is performed then that data is analyzed. Additional NMR measurements are performed and analyzed sequentially then the array of NMR analyzed data is analyzed again to get information about the system under study.

1 . A method of extracting information about a system comprising:
 a. performing a NMR measurement;   b. acquiring NMR data from the measurement;   c. expressing the NMR data using a kernel of one dimension;   d. analyzing the data to extract information;   e. repeating steps a. through d., changing one variable to modify the NMR data each time steps a. through d. are repeated;   f. reordering data obtained from step e. to form a one dimensional kernel across the systematically changed variable in step e, and   g. analyzing the data from step f. to extract information.   
     
     
         2 . The method of  claim 1  further comprising compressing the NMR data. 
     
     
         3 . The method of  claim 2  where the compressed NMR data are analyzed using a Butler-Read-Dawson optimization method. 
     
     
         4 . The method of  claim 1  where the analyzed data is presented in the form of a two dimensional map or image. 
     
     
         5 . The method of  claim 1  wherein the system is porous media. 
     
     
         6 . The method of  claim 5  wherein the NMR data acquired in step b. is a decaying signal dependent on the relaxation parameter T 2 . 
     
     
         7 . The method of  claim 6  wherein the information extracted in step d. is the NMR relaxation parameter T 2 . 
     
     
         8 . The method of  claim 7  wherein the variable in step e. is selected in order that the detected NMR signal depends on a NMR parameter from the group consisting of NMR relaxation parameter T 1 , NMR relaxation paramater T 2  andr the molecular diffusion coefficient. 
     
     
         9 . The method of  claim 8  wherein the data obtained from step e. depends on one or more of the NMR parameters from the group consisting of the NMR relaxation parameter T 1 , the NMR relaxation parameter T 2  and the molecular diffusion coefficient. 
     
     
         10 . The method of  claim 7  wherein the variable in step e. is selected from the group consisting of NMR pulse sequence timings, NMR pulse sequence magnetic field gradients and combinations thereof. 
     
     
         11 . A method comprising:
 a. performing a NMR measurement on a porous media wherein at least one NMR measurement parameter is used;   b. obtaining a decay signal from the media based on the NMR measurement parameter;   c. altering one of the at least one NMR measurement parameter and repeating steps a. and b.   
     
     
         12 . The method of  claim 11  wherein the decay signal is dependent on the relaxation parameter T 2 . 
     
     
         13 . The method of  claim 11  wherein the at least one NMR measurement parameter is selected from the group consisting of a NMR relaxation parameter T 2 , a NMR relaxation parameter T 1  and a molecular diffusion coefficient. 
     
     
         14 . The method of  claim 11  further comprising obtaining data from the decay signal 
     
     
         15 . The method of  claim 14  wherein the data obtained depends on one or more of the NMR parameters from the group consisting of NMR relaxation parameter T 1 , NMR relaxation parameter T 2  andr and the molecular diffusion coefficient. 
     
     
         16 . The method of  claim 11  further comprising further repeating step c. to  3  more dimensions. 
     
     
         17 . In a method of making a series of NMR measurements, the improvement comprising varying an NMR measurement parameter after each measurement.