Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1983-01-11
1986-09-09
Karlsen, Ernest F.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
364422, G01V 318, G06F 1550, G06G 776
Patent
active
046111735
ABSTRACT:
Variable frequency induction well logging methods and apparatus are disclosed having an approximately constant vertical response function. The frequency of operation is automatically selected to minimize propagation effects. These techniques permit an N point deconvolution of apparent formation conductivity to yield an approximation of the true conductivity of incremental layers of cylindrically symmetrical earth formations, including formations having adjacent layers of arbitrary thicknesses and conductivities.
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Thadani and Hall, Jr. "Propagated Geometric Factors in Induction Logging", presented at the 22nd Annual SPWLA Symposium, Jun. 1981.
Rice, R. B., "Inverse Convolution Filters", Geophysics, vol. 27, #1 (1962).
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Doll, H. G. "Introduction to Induction Logging and Application to Logging of Wells Drilled With Oil Base Mud", Petroleum Transaction, AIME, T.P. 2641 (Jun. 1949).
Merchant, G. A. et al, "Inverse Filtering for Systems with Unit Circle Zeroes", (paper presented at 1981 IEEE symposium).
Bravenec Frank R.
Hall, Jr. Hugh E.
Merchant Gulamabbas A.
Thadani Suresh G.
Beard William J.
Halliburton Company
Karlsen Ernest F.
Snow Walter E.
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