Drilling, construction, geophysical data, and lithologic log for borehole USGS 150

In 2019, the U.S. Geological Survey (USGS) Research Drilling Program, based in Nevada, subcontracted with WOOD PLC to drill and construct borehole USGS 150 (USGS site 433521112581801). The borehole was continuously cored from approximately 18.3 to 1399 feet below land surface, with the primary objective of gathering geological, geophysical, and seismic data to enhance models for understanding geologic hazards near the Advanced Test Reactor Complex within the Idaho National Lab (INL). On August 8, 2019, after reaching the completion depth, the USGS INL Project Office collected multiple geophysical logs. Key geophysical data included natural gamma, caliper, neutron, neutron porosity, and gamma-gamma density. These data were analyzed synergistically with the available core material to identify contacts between basalt flows and to determine the location and thickness of sediment layers. Additionally, a gyroscopic deviation survey was conducted to assess the projected well bore path. The geophysical data were collected using Century™ multi-parameter logging probes, with selected logs displayed in a well log figure that includes the natural gamma and neutron probe (9057A), caliper probe (9074 and 8074A1), gamma-gamma density probe (0024C), and gyroscopic deviation probe (9095C1). All geophysical data, except for the caliper log, were collected through the drill rod, and the logs were run from the bottom up after reaching total unobstructed depth. Geophysical log data not represented in the figures can be accessed by downloading the attached LAS files or by visiting the USGS GeoLog Locator. After the removal of the rods, the borehole did not remain open. Despite attempts to re-open the well, efforts to grout and stabilize challenging sections were unsuccessful. Consequently, borehole USGS 150 was capped after data collection but remained open until July 10, 2023, when the decision was made to abandon it. The USGS collected specific geophysical data, daily drilling notes, and detailed core descriptions from the core collected to 1399 feet below land surface, which are included in this data release. Drilling field notes from the INL subcontractor WOOD PLC are also provided. The USGS Research Drilling Program (RDP) conducted the core drilling operations and well construction from June to October 2019. The borehole core from USGS 150 was transported to the USGS Lithologic Core Storage Library at the Central Facilities Area on the INL for storage and permanent archiving. The drill core was photographed and described using standardized methods, employing commercially available software and a procedure developed by the USGS INL Project Office. This standardized approach ensures comprehensive descriptions while minimizing interpretation.

[
  "010:12"
]

[
  "geospatial"
]