Abstract：
The positive and negative difference of deep and shallow resisitivity in formation without invasion is caused mainly by the fixed two tool constants from numerical simulations. A dynamic calibration method for tool constants is proposed based on the effects of the mud and formation resisitivity ratio on the two constants calculated using the finite element method (FEM). Finally, four specific examples are given to validate the dynamic calibration method. It is an automatic borehole correction method and can give more accurate formation resistivity. The method is useful for dual laterolog logging.
WANG Xin,CHEN Hao,WANG Xiu-Ming. Dual laterolog borehole correction based on dynamic tool constants[J]. APPLIED GEOPHYSICS, 2012, 9(4): 414-420.
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2012, Vol. 9 
