Patent ID: 8655104
Filing Date: 2014-02-18
Classification: G01V

Abstract:
1. A method for obtaining a cyclic noise image from a borehole image, the method comprising: (a) acquiring a borehole image; (b) causing a surface processor to transform the borehole image acquired in (a) into a frequency domain using a two-dimensional Fourier Transform to obtain a transformed image; (c) removing a cyclic noise component from the transformed image obtained in (b) to obtain a masked transformed image; (d) causing the surface processor to inverse transform the masked transformed image obtained in (c) using a two-dimensional inverse Fourier Transform to obtain a filtered image; (e) causing the surface processor to subtract the filtered image obtained in (d) from the borehole image acquired in (a) to obtain a cyclic noise image; and (f) processing the single cyclic noise image obtained in (e) to obtain a spiral period of the cyclic noise in the image.