Claims
- 1. A method for vertically deconvolving data received from a plurality of vertically deployed receivers to obtain data for a depth of interest, comprising:providing a transmitter and a plurality of receivers, said receivers being spaced at different distances from said transmitter; generating a signal from said transmitter and receiving it as a signal σa at each of said receivers; and for each receiver calculating a conductivity measurement using the equation σij(z)=∑j∑ifijσapj(z-di),where the powers are pj=1, 3/2, 5/2, 7/2, 9/2 . . . , where z is vertical depth measured from the surface, di are a range of depth offsets spanning the depth of interest and are multiples of the depth increment, and the functions fij are calculated empirically using a linear least squares fit to find the coefficients that best match a set of target logs for at least two simulated logs at different resistivity levels.
- 2. The method according to claim 1 wherein the filter coefficients for a given power sum to the corresponding homogeneous boosting coefficient (∑i fij=cij).
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a divisional application of pending U.S. patent application Ser. No. 09/460,553 filed Dec. 14, 1999, which claims the benefit of U.S. Provisional Application Serial No. 60/112,161, filed Dec. 14, 1998, each of which are incorporated by reference herein in their entireties.
US Referenced Citations (13)
Non-Patent Literature Citations (3)
Entry |
PCT/US99/29511 PCT International Search Report dated Mar. 23, 2000 (4 pp.) WO 00/36437. |
T.D. Barber et al.: Using a Multiarray Induction Tool to Achieve High-Resolution Logs with Minimum Environmental Effects; Society of Pertoleum Engineers; SPE 22725; Oct. 6-9, 1991 (pp. 637-651). |
T. Barber et al.; A Multiarray Induction Tool Optimized for Efficient Wellsite Operation; Society of Petroleum Engineers; SPE 22725; Oct. 6-9, 1991 (pp. 637-651). |
Provisional Applications (1)
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Number |
Date |
Country |
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60/112161 |
Dec 1998 |
US |