Dipmeter data processing technique

Details Dipmeter data processing technique Dipmeter data processing technique

1980-03-31

1982-10-19

Smith, Jerry

Boots, shoes, and leggings

324323, 340860, 367 33, G06F 15336

Patent

active

043553575

ABSTRACT:
Methods and apparatus, for processing signals derived along portions of the length of a borehole to determine the relative position of geological formation characteristics, effect the correlation of pairs of signals using substantially overlapping correlation intervals to obtain cross-correlation functions for each pair of signals. These cross-correlation functions are then displayed as a function of borehole depth for each pair of curves such that discontinuities in the cross-correlation functions are rendered obvious. From such discontinuities, zoning of the data is enabled through determination of the position of significant continuous intervals. Sequences of cross-correlation functions which belong to one of these intervals may then be used to directly determine the corresponding relative position of a formation characteristic. When applied to dipmeter signals, the method produces more accurate and geologically consistent dip and azimuth values for subsurface formations.

REFERENCES:
patent: 3068400 (1962-12-01), Castel et al.
patent: 3127509 (1964-03-01), Swift
patent: 3402388 (1968-09-01), Tucker
patent: 3975674 (1976-08-01), McEuen
P. Vincent, et al., "An Approach to Detailed Dip Determination Using Correlation by Pattern Recognition," Journal of Petroleum Technology, 2-1979, pp. 232-240.
V. Hepp, et al.,"Cluster--A Method for Selecting the Most Probable Dip Results from Dipmeter Surveys," Society of Petroleum Engineers of AIME, 1975, #SPE-5543.
T. G. Stockham, Jr., "High-Speed Convolution and Correlation," AFIPS Conf. Proc., vol. 28, pp. 229-233, 1966.

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