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Abstract

Summary

The integrated true color borehole image is generated by fusing conventional log curves with borehole image. The workflow of this method is 1) generate borehole image (calibrated static and dynamic normalized images), 2) generate layer delineation from calibrated static borehole image, 3) input data selection by principal component analysis with Max. three curves, 4) RGB color assignment and composing for input curves, 5) layer average of RGB values, 6) inject RGB layer to dynamic borehole image by Pan-sharpening. This method applied to unique crust-mantle transition log data acquired by the Oman Drilling Project conducted as a part of the International Continental Scientific Drilling Program (ICDP) from 2017 to 2018. The three input curves from geochemical spectroscopy logs are selected Fe (red, data range 0–0.2), Si (green, data range 0–0.25) and Ca (blue, data range 0–0.2). The generated integrated true color image shows fair color change correlation with the three major lithologies which are 1) olivine rich dunite zone; 2) plagioclase feldspar, olivine, and clinopyroxene mixed gabbro zone; and 3) olivine and orthopyroxene dominated harzburgite zone. This method can extend borehole image capability to reflect formation property changes by color within the image.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.2025640050
2025-09-21
2026-02-15

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References

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/content/papers/10.3997/2214-4609.2025640050
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Integrated True Color Borehole Image: Finding Formation Property Changes within the Image
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.2025640050
/content/papers/10.3997/2214-4609.2025640050
/content/papers/10.3997/2214-4609.2025640050
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