Geophysical and lithologic data for 12 boreholes in Raft River Valley, Idaho

In 2022, Cold Steel Mechanical, contracted by the Idaho Department of Water Resources (IDWR), drilled and constructed twelve wells in Raft River Valley, Idaho. The wells were drilled using compressed air, dual rotary methods and were fully cased to completed depths. The U.S. Geological Survey (USGS) collected groundwater level and select geophysical data at each well between November 15th and 18th, 2022. Geophysical data were collected using�Century?�multi-parameter logging probes and select logs are displayed in well log figures. Select geophysical logs include natural gamma, neutron, gamma-gamma density, specific conductance, and temperature. Geophysical data shown in well log figures were collected using the natural gamma, temperature, and specific conductance probe (9042A), neutron probe (9057A), and gamma-gamma density probe (0024C). All geophysical data were collected through cased wells. For each well, the primary 9042A probe survey was conducted from the top-down and repeat 9042A surveys were performed from the bottom up after reaching total unobstructed depth. With exception to Well 4, where all surveys were performed from the top-down, geophysical data collected with the 9057A and 0024C probes were performed from the bottom-up after reaching total unobstructed depth. Geophysical logs, driller reports, and regional geology were examined synergistically to identify lithologic units and contacts. Geophysical data can be obtained by downloading the attached LAS files or using the USGS GeoLog Locator and searching by well identifier.

2022年，受爱达荷州水资源部（Idaho Department of Water Resources, IDWR）委托，Cold Steel Mechanical公司在爱达荷州拉夫特河山谷（Raft River Valley）钻探并建成12口井。该批井采用压缩空气双回转钻进法施工，并下套管至完钻井深。2022年11月15日至18日期间，美国地质调查局（U.S. Geological Survey, USGS）对每一口井采集了地下水位及部分地球物理数据。地球物理数据采用Century多参数测井探头采集，部分测井成果展示于测井图件中。所采集的地球物理测井项包括自然伽马、中子、伽马-伽马密度、比电导及温度测井。测井图件中展示的地球物理数据，分别通过自然伽马、温度与比电导探头（9042A）、中子探头（9057A）以及伽马-伽马密度探头（0024C）采集得到。所有地球物理数据均通过套管井采集。对于每一口井，主9042A探头测量采用自上而下的方式进行，且在抵达全通井深后，自下而上开展重复9042A测量。除4号井的所有测量均采用自上而下方式外，采用9057A与0024C探头采集的地球物理数据，均在抵达全通井深后自下而上开展测量。研究人员协同分析了地球物理测井成果、钻井日志及区域地质资料，以识别岩性单元及地层接触界面。相关地球物理数据可通过下载附件中的LAS文件，或使用美国地质调查局GeoLog定位工具并按井号搜索获取。