{"catalogue":{"name":"Open Well Data","curator":"Daniel Delgado-Uriarte","orcid":"https://orcid.org/0009-0006-0536-5158","website":"https://danieldelgadouriarte.com","linkedin":"https://www.linkedin.com/in/daniel-delgado-uriarte-b9a523278/","how_to_cite":"Delgado-Uriarte, D. (2026). Open Well Data: an index of public subsurface data sources (Catalogue build 2026-11-05) [Data set]. https://openwelldata.org/","this_record":"USGS, National Geological and Geophysical Data Preservation Program. NGGDPP Well Log Data (QA/QC guide). https://www.usgs.gov/programs/national-geological-and-geophysical-data-preservation-program/well-log-data. Page checked by Open Well Data on 2026-11-04. Found through Open Well Data (Delgado-Uriarte, 2026), https://openwelldata.org/source/usgs-nggdpp-well-logs-guide/."},"record_type":"record","id":"usgs-nggdpp-well-logs-guide","name":"NGGDPP Well Log Data (QA/QC guide)","url":"https://www.usgs.gov/programs/national-geological-and-geophysical-data-preservation-program/well-log-data","country":"United States","operator":"USGS, National Geological and Geophysical Data Preservation Program","category":"standard","disciplines":["wireline_logs"],"formats":["TIFF","LAS","DLIS","DPK","PDS"],"n_wells":"not applicable","time_range":"not stated","volume":"not stated","access":"open","api":"not stated","requires_js":false,"license":"not stated","license_url":"","redistribution":"not_stated","declared_channels":["PDF LAS QA-QC Utilities Jupyter Notebook"],"status":"web_verified","evidence":[{"url":"https://www.usgs.gov/programs/national-geological-and-geophysical-data-preservation-program/well-log-data","cita":"Geophysical well logs in paper format are scanned, saved, and distributed in tagged image file format (TIFF)."}],"notes":"Contains no well data: it describes the Kentucky Geological Survey process from TIFF to LAS and typical LAS problems (duplicated columns, depths without zero), with LASIO, Welly and LAS Certify. The URL provided is still live. Only the page image carries Public Domain.","verification":{"page_status":"ok","what_it_is":"USGS NGGDPP guide on scanning and converting paper well logs to LAS (KGS workflow) with a \"LAS QA-QC Utilities\" Jupyter notebook","page_type":"other","access_as_written":"open","license_as_written":"“Public Domain” (image credit)","formats_as_written":"TIFF, LAS, DLIS, DPK, PDS, ipynb","relevance":"medium","date":"2026-11-04","method":"Web reader: one page per source, read without downloading data."},"data_types":["geology","standards","wireline_logs"],"data_types_method":"rules v1 (scripts/clasifica_tipos.py), 4 Nov 2026","declared_variables":[],"declared_variables_method":"rules v1 (scripts/variables_fuentes.py), explicit mentions in the record, 4 Nov 2026","country_inferred":false,"catalogue_license":"CC-BY-NC-4.0 (Open Well Data catalogue, dictionaries, coverage tables and derived files; each listed source keeps its own licence). Free for non-commercial use with credit; any use by or for a company needs permission: https://danieldelgadouriarte.com"}