Steven J. Groves Toni R. Rozinek Christina A. DeVera 20251208 tabular digital data Denver, CO U.S. Geological Survey https://doi.org/10.5066/P1WNUHWO The U.S. Geological Survey (USGS) has compiled the Energy Geochemistry Database (EGDB), containing 3,619,149 analytical results for 111,791 samples collected by the Energy Resources Program (ERP) to develop an understanding of the physical and geochemical processes responsible for hydrocarbon formation. It also serves as a tool to assess oil and gas potential for sedimentary basins in both national and international settings (USGS Geochemistry Database, 2024). The EGDB is a compilation of inorganic and organic analytical data currently being captured in the ERP Laboratory Information Management System (LIMS), historic databases, and data compiled from literature and unpublished public domain sources. The EGDB is a relational database comprised of a Samples table and an Analysis table. The Samples table contains information pertaining to the location where the samples were collected and geologic information about the samples. The Analysis table contains records of analysis results from the analyses performed on the samples. Several predefined queries are included to assist with extracting data. The queries can be modified to fit user defined criteria. The EGDB is a compilation of data from historic and current databases to be used for energy resource assessments and research. This is part of the USGS effort to make all data publicly available. This database integrates historical analyses and newly generated analytical results. Sample and analyses records were selected based on the completion date of analyses, proprietary status, and submitter consent for data release. Contributors are provided a two-year period from the date of analysis completion to publish their data prior to inclusion in this system. This database is available in an Access database format and in a series of .csv files. This data release includes a data dictionary which provides definitions for the analyses, latitude/longitude (Lat/Lon) qualifiers, matrices, ranks, and descriptions for each field in the tables. Also provided is a Method_Procedures folder which contains previously unreleased methods. Within this folder, there is an Open File Report 02-389, which contains analytical methods used for the analysis of coal and coal combustion byproducts. The Gas Chromatography Methodology file, the GCMS_Methods file, and the Selected Methods of the Organic Geochemistry Laboratory file all contain methods which were used prior to 2013. Energy Geochemistry Laboratory (EGL) methods were established in 2013 and were in use until 2018. ERP-PGRL methods currently being followed are listed in the PGRL Method References file. EGDB contains data records from the Athena and Pluto historical databases, Geology, Geophysics, and Geochemistry Science Center's (GGGSC) National Geochemical database (NGDB), and the Central Energy Resources Science Center’s Organic Geochemistry Database (OGDB). These systems were migrated into the ERP LIMS in 2007 to provide a centralized location for capturing analysis data generated by ERP laboratories. The following is a summary of each database that was migrated: The Athena Geochemical database was maintained within the Mineral Resources Science Center's in-house Laboratory Information Management System (PLUTO/LIMS) from 1995-1997 (Geology, Geophysics, and Geochemistry Science Center, 2020) contained records with Laboratory IDs ranging from EA01-EC54 and sample IDs ranging from E000001-E004952. Sample types of coal, leachates, miscellaneous, rock, sediment, soil, water, blank, and standard were included in the data migrated to the ERP LIMS. The archived Pluto Geochemical database maintained by the former Branches of Analytical Laboratories and Geochemistry from 1979-1995 (Geology, Geophysics, and Geochemistry Science Center, 2020) contained records with Laboratory IDs ranging from F384 – CK55 and sample IDs ranging from D122194 – W259104. Sample types of coal, coal combustion, organic fuel, and rock were included in the data migrated to the ERP LIMS. The NGDB maintained by the GGGSC contained records for samples associated with the Energy Program. A subset of samples that were submitted by ERP personnel were migrated from the NGDB to the ERP LIMS in 2007. These records spanned several decades with multiple naming conventions for laboratory IDs and sample identification. The laboratory IDs of the migrated samples range from 12606-80245, AA89-WV82, I001-N695, MRP00631-MRP07718, and X0025-Z1082. Sample IDs range from C118874-C118936, D122194-D585158, LAS118-LDD965, M140272-M141786, W169814-W259104 with sample types of coal, leachate, miscellaneous, mudstone, peat, sandstone, siltstone, shale, and soil. The OGDB contained chemical analysis data for crude oil, natural gas, coal, water, rock, and laboratory altered samples analyzed by the USGS Energy Resources Science Center’s Geochemistry Laboratory, or by contracted-service laboratories. Data were also obtained from the literature and unpublished public domain sources. Job Numbers (captured in the OrderID field) consist of a 2-digit year, followed by 3-digit sequential number for jobs submitted in that year. Job numbers (OrderIDs) beginning with 80 were reserved for rescued data and data captured from literature. Sample IDs consist of the job number followed by a 3-digit sequential number ranging from 001 to 999. Starting in 2007, sample and analysis data have been captured in the ERP LIMS database. Data migrated from the above-mentioned databases were imported into the ERP LIMS. The Lab ID/Job Numbers and Sample ID formatting was preserved from the original databases. The ERP LIMS Job Numbers/Order IDs were formatted starting with the letter E followed by a 2-digit year, 2-digit month and a 2-digit sequential number for each batch of samples submitted during that month. Sample numbers consist of the job number followed by a dash and 3-digit sequential number for each sample. The database structure is comprised of the following tables: Samples – Contains information about each sample, including location, geology, geography, depths, etc. Analysis – Contains details on analyses performed and their results. Numerous Analyses records are provided for most samples. Lookup tables are included to describe in detail each attribute; refer to the entity and attribute overview section for further details. Unknown 2021 Supplemental Complete Annually -179.1833 179.3300 88.9405 -77.8167 ISO 19115 Topic Category geoscientific Information None geochemistry data U.S. Geological Survey USGS USGS Energy Resources Science Center USGS Central Energy Resources Science Center CERSC Energy Geochemistry Database EGDB analytical chemistry geochemistry energy resources USGS Metadata Identifier USGS:68a8a28fd4be026335793f26 None Afghanistan Arctic Ocean Argentina Armenia Australia Austria Azerbaijan Bangladesh Barbados Belgium Belize Bolivia Brazil Bulgaria Belarus Canada Chile China Colombia Costa Rica Croatia Cuba Czech Republic Estonia Ethiopia France Gabon Germany Greece Hungary India Indonesia Iran Iraq Ireland Israel Italy Japan Jordan Malaysia Mauritania Mexico Mongolia New Zealand Nigeria None Pakistan Peru Poland Portugal Puerto Rico Republic of Ireland Russia Rwanda Saudi Arabia Scotland Serbia Slovakia South Korea Spain St. Lucia Sweden Switzerland Tajikistan Tanzania Thailand Trinidad and Tobago Turkey Ukraine United Kingdom United States Venezuela Yugoslavia Zimbabwe None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata to understand appropriate use and data limitations. Steven J. Groves U.S. Geological Survey Information Technology Specialist mailing

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Denver Colorado 80225 United States 303-236-5239 energylabs@usgs.gov Microsoft Access Data compiled from historic databases and contracted-service laboratories have been reviewed for accuracy based on the information provided at the time it was imported into the current LIMS. Quality assurance and quality control (QAQC), sample collection, and documentation have varied over time. In many instances, latitude and longitude site location information for wells is derived from a USGS one-quarter mile grid system. Please note that because of the significant number of data sources, laboratory techniques, and reporting units included in this release, it is not possible for USGS to guarantee the precision or accuracy of any individual data point. Latitude and longitude values included from historic databases are as is and may not match other location information for a given sample. This database is derived from the Energy Resources Program's LIMS and contains data from historic databases as well as contracted-service laboratory analysis. Each record in the Samples and Analysis tables must have the following criteria: Each sample must have a unique OrderID Each sample must have a unique SampleNumber Each analytical determination must be linked to a unique OrderID Each analytical determination must be linked to a Test Each analytical determination must be linked to a Parameter All non-proprietary data in the LIMS with an analysis completion date prior to January 1, 2022 are included in this dataset. The completeness of the sample information is dependent on what sample submitters provided at the time of sample submittal. No proprietary data are included in this database. Horizontal Positional Accuracy Report: positional information was provided by sample submitters and no additional information regarding accuracy was captured other than LatLon_Qualifiers in some cases. Vertical Positional Accuracy Report: Depths were provided by sample submitters Select samples to append to the public database: EGDB consists of sample and analysis records that reside in the ERP LIMS. Sample and analysis records are selected based on the analysis completion date for each analysis, the proprietary status for each set of samples, and submitters approval to release the analysis results. Samples from historic databases and recovered data where the analysis completion date is unknown were included based on the dates when the databases were actively used by laboratories to capture data. 20240108 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

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Denver CO 80225 303-236-5239 energylabs@usgs.gov Data review for accuracy: Records selected for inclusion in the EGDB were reviewed for accuracy of sampling location, result values, and comments. These samples were analyzed by multiple laboratories and span multiple decades with varying techniques and precision, which made quality checks difficult to perform with any precision. It was determined that the analysis name, technique, and results would be reported as documented in the original database. Analysis results were screened for minimum and maximum values to eliminate values outside the expected range of results. Latitude values were checked to ensure all values were between -90 and 90 degrees. Latitude values were checked to ensure all values were between -180 and 180 degrees. Sampling location information was reviewed for errors, including latitude and longitude values that do not agree with country and state values. When a corrected sample location could be verified, based on additional information provided by the submitter, the corrected values were entered into the database. If a supposed corrected value could not be verified, the original values were not altered and were kept as provided. Result values were checked for minimum and maximum values that far exceeded the normal range of values for each parameter. Questionable data was referenced back to the original database for verification and the comments field was reviewed for additional information. Data values were only changed if there was a discrepancy between the original database value and the value exported from LIMS. 20250701 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

One Denver Federal Center, Building 810, Ent-11, MS 977

Denver CO 80225 303-236-5239 energylabs@usgs.gov Update proprietary latitude and longitude values: Records containing well information from proprietary commercial databases were altered so that no proprietary data are included. Latitude and longitude values derived from proprietary sources are altered based on a quarter mile center cell grid or are rounded to two decimal places for approximately half mile precision. The precision and source of the latitude and longitude values is recorded in the LatLon_Qualifier field in the Samples table. 20240701 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

One Denver Federal Center, Building 810, Ent-11, MS 977

Denver CO 80225 303-236-5239 energylabs@usgs.gov Add Analysis Group field: Various laboratories used different naming conventions for the same or similar analysis and techniques and these variations are reflected in the database. To assist with querying the analysis data, an AnalysisGroup field was added to the Analysis table to group similar analyses. The AnalysisGroup field can be used in data queries to filter similar analyses by using the analysis group name to filter records. 20240801 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

One Denver Federal Center, Building 810, Ent-11, MS 977

Denver CO 80225 303-236-5239 energylabs@usgs.gov Analysis method and procedure documentation: Collected documentation on the analysis processes and procedures used by multiple laboratories, including the ERP Organic Geochemistry Laboratory from 1989 to 2009, the ERP Energy Analytical Laboratory from 1995 to 2009, the Energy Geochemistry Laboratories between 2009 and 2017, and published Petroleum Geochemistry Research Laboratory methods beginning in 2017 under the Energy and Minerals Quality Management System. Additional method information is provided with the metadata files; see EGDB Methods Documentation folder. 20250301 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

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Denver CO 80225 303-236-5239 energylabs@usgs.gov Samples Table containing the records of samples, including sample collection location and geologic information related to the samples. authors of EGDB OrderID Unique Identification assigned to batches of samples authors of EGDB Identification assigned to batches of samples SampleNumber Unique identification assigned to each sample within an OrderID authors of EGDB Unique identification assigned to each sample within an OrderID FieldID Client sample identification name or number authors of EGDB Client sample identification name or number Matrix Sample Type authors of EGDB Sample Type SampleDelineation Additional sample identification information authors of EGDB Additional sample identification information Samples Table Comments Comments and special instructions pertaining to each sample authors of EGDB Comments and special instructions pertaining to each sample LatLon_Qualifier Source or accuracy of latitude and longitude values authors of EGDB Source or accuracy of latitude and longitude values Latitude Decimal latitude of sampling location authors of EGDB Decimal latitude of sampling location Longitude Decimal longitude of sample location authors of EGDB Decimal longitude of sample location Site Sampling site, Secondary ID, and Well Name concatenated authors of EGDB Sampling site, Secondary ID, and Well Name concatenated WELLN Well number for well samples only authors of EGDB Well number for well samples only API American Petroleum Institute (API) number (U.S. wells only) authors of EGDB American Petroleum Institute (API) number (U.S. wells only) FIELDN Oil/gas field name authors of EGDB Oil/gas field name FORMN Formation name authors of EGDB Formation name AGE Formation age based on local nomenclature, Geologic Time Scale-89, or as provided by sample submitter with no additional information available. authors of EGDB Formation age based on local nomenclature, Geologic Time Scale-89, or as provided by sample submitter with no additional information available. BED Coal bed name authors of EGDB Coal bed name BEDTH Bed thickness for coal samples authors of EGDB Bed thickness for coal samples ELEV Elevation in METERS of well or spot sampling location authors of EGDB Elevation in METERS of well or spot sampling location ELEVF Elevation in FEET of well or spot sampling location authors of EGDB Elevation in FEET of well or spot sampling location TOPDEPTH Top depth sampled in METERS authors of EGDB Top depth sampled in METERS TOPF Top depth sampled in FEET authors of EGDB Top depth sampled in FEET BOTDEPTH Bottom depth sampled in METERS authors of EGDB Bottom depth sampled in METERS BOTF Bottom depth sampled in FEET authors of EGDB Bottom depth sampled in FEET TD Total depth drilled in METERS authors of EGDB Total depth drilled in METERS TDF Total depth drilled in FEET authors of EGDB Total depth drilled in FEET LITHO1 Lithology description 1 authors of EGDB Lithology description 1 LITHO2 Lithology description 2 authors of EGDB Lithology description 2 LITHO3 Lithology description 3 authors of EGDB Lithology description 3 LITHPCT1 Lithology percentage 1 authors of EGDB Lithology percentage 1 LITHPCT2 Lithology percentage 2 authors of EGDB Lithology percentage 2 LITHPCT3 Lithology percentage 3 authors of EGDB Lithology percentage 3 RANK Coal rank refers to the degree of coalification. Ranks are provided by the sample submitter and no additional information on accuracy is available. authors of EGDB Coal rank refers to the degree of coalification. Ranks are provided by the sample submitter and no additional information on accuracy is available. SECTR Section, Township and Range of sampling location (U.S. only) authors of EGDB Section, Township and Range of sampling location (U.S. only) COUNTY County of sample location (U.S. only) authors of EGDB County of sample location (U.S. only) STATE/Province State or Province of sampling location authors of EGDB State or Province of sampling location COUNTRY Country of sampling location authors of EGDB Country of sampling location Publications DOI Number of publication authors of EGDB DOI Number of publication Analysis table containing records of analysis results from the analysis performed on the samples authors of EGDB OrderID Unique identification assigned to batches of samples authors of EGDB Unique identification assigned to batches of samples SampleNumber Unique identification assigned to each sample within a specific OrderID authors of EGDB Unique identification assigned to each sample within a specific OrderID AnalysisGroup Grouping of related analyses authors of EGDB Grouping of related analyses Matrix Sample type authors of EGDB Sample type Delineation Additional sample identification information authors of EGDB Additional sample identification information Analysis Analysis performed authors of EGDB Analysis performed Method Procedure followed to analyze a sample authors of EGDB Procedure followed to analyze a sample Param Parameter authors of EGDB Parameter Result Reported value for an analyzed parameter authors of EGDB Reported value for an analyzed parameter Units Reported units authors of EGDB Reported units Comments Analysis Comments authors of EGDB Analysis Comments GS ScienceBase U.S. Geological Survey mailing address

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata, and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P1WNUHWO None 20251208 Steve J Groves USGS - ROCKY MOUNTAIN REGION Information Technology Specialist mailing

One Denver Federal Center, Building 810, Ent-11, MS 977

Denver CO 80225 303-236-5239 energylabs@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999