Completion Report for Well Cluster ER-5-4

U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office ; Bechtel Nevada

Bechtel Nevada Corporation

关键词: Hydrology;    Nevada Test Site;    Water Wells;    Stratigraphy;    Well Completion;   

DOI  :  10.2172/840505
RP-ID  :  DOE/NV/11718--998
RP-ID  :  AC08-96NV11718
RP-ID  :  840505

美国|英语

来源: UNT Digital Library

【 摘 要 】

Well Cluster ER-5-4 was drilled for the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office, in support of the Nevada Environmental Restoration Project at the Nevada Test Site, Nye County, Nevada. The cluster consists of two wells, positioned about 30 meters apart on the same drill pad, constructed as part of a hydrogeologic investigation program for Frenchman Flat at the Nevada Test Site. Detailed lithologic descriptions with preliminary stratigraphic assignments for the well cluster are included in this report. These are based on composite drill cuttings collected every 3 meters, and 156 sidewall samples taken at various depths below 192 meters in both boreholes, supplemented by geophysical log data. Detailed petrographic, chemical, and mineralogical studies of rock samples were conducted on 122 samples. Well ER-5-4 penetrated approximately 1,120 meters of Quaternary and Tertiary alluvium before reaching total depth in Tertiary volcanic rocks at 1,137.5 meters. The deeper Well ER-5-4 No.2 penetrated 1,120.4 meters of alluvial sediments, and was terminated within Tertiary volcanic rocks at a depth of 2,133.6 meters, indicating that Paleozoic rocks are deeper than expected at this site.