<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs

<p>A huge amount of legacy drilling data is available in geological survey but cannot be used directly as they are compiled and recorded in an unstructured textual form and using different formats depending on the database structure, company, logging geologist, investigation method, investigat...

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Autores principales:	R. Joshi, K. Madaiah, M. Jessell, M. Lindsay, G. Pirot
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/c62c3a8769c44c26b8b0fd8c4d79a713
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spelling	oai:doaj.org-article:c62c3a8769c44c26b8b0fd8c4d79a7132021-11-04T12:52:45Z<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs10.5194/gmd-14-6711-20211991-959X1991-9603https://doaj.org/article/c62c3a8769c44c26b8b0fd8c4d79a7132021-11-01T00:00:00Zhttps://gmd.copernicus.org/articles/14/6711/2021/gmd-14-6711-2021.pdfhttps://doaj.org/toc/1991-959Xhttps://doaj.org/toc/1991-9603<p>A huge amount of legacy drilling data is available in geological survey but cannot be used directly as they are compiled and recorded in an unstructured textual form and using different formats depending on the database structure, company, logging geologist, investigation method, investigated materials and/or drilling campaign. They are subjective and plagued by uncertainty as they are likely to have been conducted by tens to hundreds of geologists, all of whom would have their own personal biases. <i>dh2loop</i> (<span class="uri">https://github.com/Loop3D/dh2loop</span>, last access: 30 September 2021) is an open-source Python library for extracting and standardizing geologic drill hole data and exporting them into readily importable interval tables (collar, survey, lithology). In this contribution, we extract, process and classify lithological logs from the Geological Survey of Western Australia (GSWA) Mineral Exploration Reports (WAMEX) database in the Yalgoo–Singleton greenstone belt (YSGB) region. The contribution also addresses the subjective nature and variability of the nomenclature of lithological descriptions within and across different drilling campaigns by using thesauri and fuzzy string matching. For this study case, 86 % of the extracted lithology data is successfully matched to lithologies in the thesauri. Since this process can be tedious, we attempted to test the string matching with the comments, which resulted in a matching rate of 16 % (7870 successfully matched records out of 47 823 records). The standardized lithological data are then classified into multi-level groupings that can be used to systematically upscale and downscale drill hole data inputs for multiscale 3D geological modelling. <i>dh2loop</i> formats legacy data bridging the gap between utilization and maximization of legacy drill hole data and drill hole analysis functionalities available in existing Python libraries (<i>lasio</i>, <i>welly</i>, <i>striplog</i>).</p>R. JoshiK. MadaiahM. JessellM. LindsayM. LindsayG. PirotCopernicus PublicationsarticleGeologyQE1-996.5ENGeoscientific Model Development, Vol 14, Pp 6711-6740 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 R. Joshi K. Madaiah M. Jessell M. Lindsay M. Lindsay G. Pirot <i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
description	<p>A huge amount of legacy drilling data is available in geological survey but cannot be used directly as they are compiled and recorded in an unstructured textual form and using different formats depending on the database structure, company, logging geologist, investigation method, investigated materials and/or drilling campaign. They are subjective and plagued by uncertainty as they are likely to have been conducted by tens to hundreds of geologists, all of whom would have their own personal biases. <i>dh2loop</i> (<span class="uri">https://github.com/Loop3D/dh2loop</span>, last access: 30 September 2021) is an open-source Python library for extracting and standardizing geologic drill hole data and exporting them into readily importable interval tables (collar, survey, lithology). In this contribution, we extract, process and classify lithological logs from the Geological Survey of Western Australia (GSWA) Mineral Exploration Reports (WAMEX) database in the Yalgoo–Singleton greenstone belt (YSGB) region. The contribution also addresses the subjective nature and variability of the nomenclature of lithological descriptions within and across different drilling campaigns by using thesauri and fuzzy string matching. For this study case, 86 % of the extracted lithology data is successfully matched to lithologies in the thesauri. Since this process can be tedious, we attempted to test the string matching with the comments, which resulted in a matching rate of 16 % (7870 successfully matched records out of 47 823 records). The standardized lithological data are then classified into multi-level groupings that can be used to systematically upscale and downscale drill hole data inputs for multiscale 3D geological modelling. <i>dh2loop</i> formats legacy data bridging the gap between utilization and maximization of legacy drill hole data and drill hole analysis functionalities available in existing Python libraries (<i>lasio</i>, <i>welly</i>, <i>striplog</i>).</p>
format	article
author	R. Joshi K. Madaiah M. Jessell M. Lindsay M. Lindsay G. Pirot
author_facet	R. Joshi K. Madaiah M. Jessell M. Lindsay M. Lindsay G. Pirot
author_sort	R. Joshi
title	<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
title_short	<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
title_full	<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
title_fullStr	<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
title_full_unstemmed	<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs
title_sort	<i>dh2loop</i> 1.0: an open-source python library for automated processing and classification of geological logs
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/c62c3a8769c44c26b8b0fd8c4d79a713
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<i>dh2loop</i> 1.0: an open-source Python library for automated processing and classification of geological logs

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