A filling method of blank strip for electrical logging images based on morphological information of fractures
There are blank strips with varying widths and positions in resistivity logging images.However,the commonly used inverse distance-weighted interpolation filling method for blank strips only relies on the distance parameters of pixel points to calculate interpolation,which often leads to inconsistent texture between the filled area and the measured area,and the texture tends to be linear,which is inconsistent with the actual situation.To solve this problem,this paper takes the morphological information and distribution of fractures as parameters,constructs an interpolation calculation model,and develops a blank strip filling method that inte-grates the morphological and distribution information of fractures.The filling algorithm can dynamically adjust the weight coefficient of the reference point to the interpolation point according to the relative position relation-ship between the interpolation point and the morphological fitting line of fractures.The texture of the fracture area is coherent and smooth,which is more consistent with the actual morphology and distribution of the frac-ture.The application results of actual logging data show that compared with the traditional filling method,the similarity of the distribution fitting line of fracture filled with this method and the curve after the Hough trans-form increases by more than 25％,and the number of discontinuously filled points decreases by more than 88％,with obvious performance improvement.The application of this method provides more favorable data support for intelligent identification and precise segmentation of various fractures in logging images in the future.
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