In this paper an efficient analysis for the response of dual lateral logging(DLL) tool in complex environment has been presented. The computer code for DLL analysis based on the theory in this paper has been developed and the results are in excellent agreement with the data published previously. It can be used to analyse quantitatively the combined effect of borehole
mudcake
invation and shoulder beds on DLL response
to provide numerical simulation for design of new sonde and to develop computer-aid logging interpretation software.