METHOD OF IMAGING SUBSURFACE FORMATIONS USING A VIRTUAL SOURCE ARRAY

摘要

THIS INVENTION RELATES GENERALLY TO A METHOD OF SIMULATING THE SIGNAL OF AN ELECTROMAGNETIC SOURCE USING ONE OR MORE DIPOLE SOURCES (100 -120). IN THE METHOD A DIPOLE SOURCE IS LOCATED AT AN EXCITATION LOCATION CORRESPONDING TO A SEGMENT (102) OF THE ELECTROMAGNETIC SOURCE (110) TO BE SIMULATED. THE DIPOLE SOURCE IS ACTIVATED (112) AND AN ELECTROMAGNETIC SIGNAL RECORDED AT ONE OR MORE RECEIVER LOCATION (114). THIS PROCESS IS REPEATED FOR ADDITIONAL EXCITATION LOCATIONS CORRESPONDING TO ADDITIONAL SEGMENTS OF THE ELECTROMAGNETIC SOURCE (116). THE DATA FROM THE SEQUENCE OF DIPOLE SOURCE EXCITATION LOCATIONS IS PROCESSED TO DETERMINE THE SIMULATED SIGNAL OF THE ELECTROMAGNETIC SOURCE (120).